. /Si I §, V *V ' # 'V" ' jr fSr e •£ -i 'SfciJ a -'-o- m / £ f I SF TF£ umvERsiTr SF luimis THE Motorman’s Guide A Practical Treatise on Street Railway Motors. Car Wiring. — The Proper Way to Cut Out Motors. — Operation and Care of K Controllers. — Short Circuits and How to Locate Them. — Incan- descent Light Circuits. — Westing- house Motors. — General Electric 800 Railway Motor, and Ser- ies Parallel Control- ler, Etc., Etc. DESCRIPTIVE ILLUSTRATIONS AND DIAGRAMS. By J. W. Gayetty. CHICAGO: LAI R D <& LEE, Entered according to Act of Congress in the year 1896, By J. W. Gayetty, at the office of the Librarian of Congress d% Washington, D. C. Copyright 1898, by Wm. H. Lee. £2f.33 \ ALTRELD HALL STACKS INDEX. PAGE Car Wiring 12 Conclusion 115 Description First and Second Notches 93 Description Third Notch 95 Description Fourth Notch. 97 Description Fifth and Sixth Notches 99 Economy is Wealth Ill Electric Motor Force, or How Armature Ro- tation is Obtained 48 General Electric Company’s Series Parallel Controller 88 General Electric 800 Railway Motors 80 General Information on Westinghouse Motors 53 How to Locate Trouble in a Car While Run- ning on the Road 17 How to Locate Trouble in a Reversing Switch and How to Overcome it 24 . How to Reverse a Car in Order to Obtain Best Effects 26 How to Increase the Speed of a Motor by Changing Two Connections 53 Illustration of T. & H. Car Wiring, 114 Information on Incandescent Light Circuits.. 41 679348 PAGE Instructions for Operating and Care of K Controllers 22 Introduction 5 Information on Open Circuits and Sparking Brushes 65 Points of Interest to All 73 Points About Motors that Should be Exam- ined Often 30 Proper Methods for the Government of Mo- tors 103 Short Circuits — What a Short Circuit Means and How to Locate It 34 Some Questions Which You May be Called Upon to Answer . . . 68 Terminal or Field Wires 16 The Proper Way to Cut Out Different Mo- tors ... 19 Westinghouse Fuse Block 61 Westinghouse Lightning Arrester 62 Westinghouse Lamp Circuit 63 Westinghouse Series Parallel Controllers. . . . 106 Introduction. In presenting this pocket edition to the public I will say that it has been the author's intention to confine himself exclusively to points of interest to the Motormen of the country, realizing, as I do, that there is not, nor has there ever been, anything written which would dis- close to this class the knowledge they seek. In order to do this it is my intention to define everything pertaining to street R. R. Motors in the simplest manner, omitting all algebraic and other terms such as have served in all books previously written, to prevent you from comprehending their meaning. And if strict attention is paid to the teachings 5 and instructions herein contained, you will be able to withstand the most rigid examination from your Superintendent real or anticipated, as well as to make an intelligible report of the defects and the work to be done on your car and motors. It is not generally known, but it is a fact, nevertheless, that all Motormen on all street railways are to be examined by a State Board of Examiners yet to be ap- pointed by the Governor of each State, as to their qualifications and capabilities to hold the positions they are now filling. It stands to reason that those found wanting will have to go, and those who have devoted a little of their leisure time to profitable study, will succeed them. It is in order, right here, to state that the man of influence is going to have some hard studying and become posted, or step down and out, as the pull cannot hold him. He must possess a thorough knowledge of his business, or those who do will certainly succeed him. It is indeed necessary to repeat here 6 that old adage, “a still tongue makes a wise head;” and what is meant by using the saying is, what you learn keep to yourself; or in other words, do not lend your book to anyone, for as the saying goes, “one man prospers by his fellow- man’s downfall.” So do not assist in your own downfall. Recognizing the fact that not one Motorman in twenty thoroughly under- stands his motors, I feel that I am giving them great value for their money, and at the same time furnishing them with the means of holding a position on any line they may be employed on. While serv- ing as foreman in different car houses, the author has been able to gain a great many pointers that will come up on the examination of Motormen and conductors, and having possessed these, together with my knowledge of electricity, I feel perfectly safe in stating that they cannot ask you any question that I have not hon- estly and correctly answered in this little book. If you wish to learn the value of this 7 book, go to your electrician, or man in charge of your motors, and ask him for in- formation, and then, and not until then, will you learn the true value of this book. It has always been understood by all elec- tricians or foremen of car houses; that no information of any importance be given to anyone outside of their class, and con- sequently most men running cars to-day are ignorant of their motors . Now that I have dissolved partnership with that class of people, I am at liberty to impart to Motormen and conductors how to thoroughly understand and man their machines, regardless of what my brother electricians may deem fit to say or think about me. I have honestly served my time, and think I have a right to suit my own pleasure in regard to what use I make of my experience. Having been a Motorman myself I know how insignificant a man is and how small he feels when running a car with no knowledge whatever of his motors. It has been my experience to see hun- 8 dreds of cars turned in off the road by Motormen who were asked by housemen what the trouble was. Well, of course their answer would be, simply “I don't know.” And they should not be held responsi-i ble for what they have had no chance or' opportunity to learn. It will be well for me state here that it is the earnest desire of every company owning and operating electric roads to have each and everyone of their em- ployees thoroughly understand the com- plete workings of their motors, for it) would be a saving of thousands of dollars) each year to them. On the other hand it is the same amount of money in the different electric companies' pockets to keep the men in ignorance. Now, then, you are aware that neither of the companies will protect you in ignorance, so it behooves you to work out your own salvation, and the sooner 9 you grasp the opportunity, the better for you and your family. I propose to write this book just as I .have learned it from actual experience land hard work on motors, and it will be more valuable to you than a book written by highly educated electricians where nothing but highly electrical terms and phrases are used. There are a number of such books now on the market that Motormen have bought at fancy prices and after reading they are just as much in the dark as before they read them. In fact they sel- dom look at them the second time, for the simple reason that the Motormen of to-day are totally unprepared for such works, and cannot understand them. It is foreign reading to them and was never intended to give them any informa- tion of what they ought to know. Knowing the above statement to be facts, I propose to write this book in plain Motorman’s language, starting in from the very beginning the same as if 10 you had never seen a car, and carry you right along through, explaining in detail every part of a street car motor, and will confine myself to actual information necessary to the Motorman. \ 11 JL Practical PQotorniaij. Gar Hlirirjg. It is very necessary that each and every Motorman should thoroughly un- derstand how a car is wired, and then in case one of the connections break, he can readily find it and repair it. You will find in this pocket edition a complete drawing of the wiring of a car with two motors wired in multiple. By following very closely the explana- tion here given with your drawing before you, it will be very easy to understand it, and it will enable you to trace your cur- rent from the trolley wire through the different parts of your car to the ground. Commencing at the trolley head, or wheel, it is received from the trolley wire 12 thence down the trolley pole to trolley stand, there you will find the first con- nection made connecting your trolley with the car wire. Your current and wire leads from the trolley stand to the front over-head cut-out box, where two connections are made; crossing same, returns along roof of car to rear over- head cut-out box, where also two connec- tions are found; crossing cut-out box, wire runs down corner post of car to the fuse box with two more connections, it runs to the lightning arrester crossing^ with two connections. After leaving the lightning arrester it runs along the flooring of your car to che controller, or resistance coils, which receives it with one connection and dis- patches it with another. Leaving resistance coils it runs direct to your field coils through what is termed the end wire, where a connection is made. Passing through the field coils it re- turns out of the same through the field 13 ground-wire where a connection is made with the fields and field ground-wire. It next runs direct to the reverse switch; connecting with same it crosses and connects with the positive brush lead, which conducts it to the commuta- tor where a connection is made on to the brush or carbon holder. It is then received by the armature from the commutator. Passing through the armature it returns through and is received by the negative brush lead and conducted back to the reverse switch with same connections made as when crossing before. Crossing reverse switch, it is received by the motor ground- wire which runs to and is connected on to the front end of motor casing. The above is a correct illustration of car wiring and current tracing, and when reading, by frequent reference to the accompanying cut or drawing, can be readily understood. The high speed or loop wire takes the 14 same course as the end wire connected to your controller, with all resistance cut on! it runs direct to the field coils, side by side with your end wire, passing through field coils, returns through and out field ground wire; there is only one field ground-wire and consequently the fields discharge the current received from both the loop and end wire through the same wire. It must also be borne in mind that the field coils receive current from one wire at a time; when receiving from the end wire the loop is cut out, also when receiving from the loop wire the end wire is cut out. The current received by the field coils through the loop or high-speed wire returns out the field ground-wire, and runs direct to the reverse switch, cross- ing same, to positive brush lead, thence to commutator, into armature. Out of armature, through negative brush lead, back to reverse switch, crossing to motor ground-wire to the casing on motor. 15 Terminal or Field Wires There are three wires leading into the field-coils, and it is very necessary for a Motorman to know and be able to distin- guish one from another, which is very easily done if you will pay strict attention to the following description. The inside wire on each field coil is the end wire. To be more sure and explicit, we will say the wire nearest the gearing, on the opposite motor, is the end wire. The location of the end wire can be more readily understood after we locate the loop and field ground-wire. The loop or high-speed wire is the cen- ter or middle wire. The outside wire on each machine is the field ground wire, or the wire nearest the ends of the car. By referring to the car-wiring cut with the above explanation you can post your- self thoroughly, and know positively which wires to disconnect in case one of your motors becomes disabled. 16 How to Locate Trouble in a Car while Running on the Road This, perhaps, is the most difficult prob- lem a Motorman is called upon to solve, and one which occurs to him almost daily. It does not matter whether a motor is new or old, there is quite a num- ber of things could happen to it at any moment, and you want to be posted so as to be able to locate and fix it quickly and make time. If your car, while on the road, should lose the power, and fail to respond to your -controller, first ascertain if the trouble is at the power station by trying your light circuit. If your lamps light you know the trouble is in your car; such being the case, you will examine the overhead cutout switches, as some mis- chievous person may have thrown one of them off. Finding both switches O. K., examine your fuse, as they often melt off. Finding this O. K., next examine your reversing switch by throwing switch both 17 ways, as quite often cars will throw the reverse on the center while rounding a curve, especially cars equipped with cable controllers. I have seen quite a number of cars laid out on the road from this cause aloe, the Motorman having exam- ined the car thoroughly, and overlooking this particular part. Finding this O. K., it is then necessary for you to run over all connections, as one of them may have broken off. If you find them all intact, you have performed all the duty that is expected of you, for if the trouble is not found by the above inspection, it lies in your motors, and is beyond your reach, consequently you will not be held respon- sible. A Motorman cannot be too thorough in his investigations, for he can easily overlook a broken feed wire, which if found after his reporting everything O. K. would place him in an unfavorable light with the electrician or house foreman in charge. It is very easy for every man to famil- iarize himself with every connection on or 18 about his car, as you have an abundance of time while on the road or at the car house. Practice makes perfect, and if you will study a little along with your practice, you will be rewarded for so doing, as a man who thoroughly under- stands his car and its workings is soon found out and receives more than ordin- ary attention both from his employer and his fellow men. The Proper Way to Cut Out Dif- ferent Motors There are a great many Motormen who do not know how to intelligently cut a motor out of circuit in case it gets dis- abled, and this information is intended for those who do not know; who have tried to get it in vain. I have seen cars brought in off the road with every wire disconnected that the Motorman could find about the machine. In such cases the men are only guessing at the result 19 and consequently are scared half to death for fear they have done something that will incur the displeasure of the electric- ian in charge. There are different ways of cutting out a motor. . One way is simple and quick: remove the carbons or brushes. But it will be well for me to state that removing the brushes will not be allowed by some electricians, as it is not the safest plan on account of some brush holders coming in too close contact with your commutator. If you can get permission from your elec- trician in charge to cut out a motor by removing the brushes, it would be easier for you and would exonerate you in case of trouble. The proper and safest way is to discon- nect the end and loop wires from the terminal board, which makes you abso- lutely safe. This can be done very quickly if you have a small wrench at hand. Remove the small bolts or screws that hold the wires to the field coils or terminal board. After removing bolts or 20 screws, bend wire back and away from connections, replace bolts and your motor is dead and free from harm. The above method of cutting out a motor only pertains to the general electric system equipped with the rheostat controller, but may be applied to the J controller, providing you are close to the car house and do not have a very great distance to travel, as cutting out a motor equipped with the J con- troller by removing the brushes* your motor in circuit will not respond until the third speed notch is reached, which gives a heavy jerk to your machinery. All controllers on cars equipped with the general electric system are fast being supplanted by their latest type of con- troller, known as form K, and it seems to meet a more universal approval than any other yet devised. The controller known as form K can be used with a single equipped motor if desired, but it has been designed for use where double motor equipments are used. At the base of 21 each controller will be found two double throw switches, by which either motor can be cut out of circuit. When it is desired that both motors should be in circuit, as is ordinarily the case, both switches should be down. To cut out motor number one (which is motor near- est fuse box) throw up left-hand switch, leaving right-hand switch down; to cut out motor number two (which is the motor farthest from fuse box) throw up right-hand switch, leaving left-hand switch down. Instructions for Operating and Care of K Controllers When using this controller at one end of the car the position of cut-out switch in the other controller is immaterial if the idle controller is at “off” position. The following method will inform you bow to keep this controller in good con- dition. To examine this controller, open 22 cover, remove bolt with wrench attached and swing around the pole piece of the magnet, which will expose to your view the cylinder contacts, which should always be kept clean. The reversing cylinder is also accessi- ble as soon as the cover has been swung open. ^ The cylinder plates and fingers resting on them should be given par- ticular attention, and their surface kept in good condition. A little vaseline should be used on cylinder contacts to prevent them from cutting. All bearings should be kept lubricated. In operating this controller the handles should be steadily moved from notch to notch. The position of cylinder is indicated by a pointer moving over a dial, which is placed on top of controller, and the posi- tion can be felt also as the cylinder moves from notch to notch. The motors are in series, with resistance on first and second points, which should be used only for starting. On fifth point motors are par- allel with resistance. This point is de- 23 signed merely to smooth action of con- trollers, and should not be used as a running point under any consideration. To secure best efficiency for continuous operation use points 3, 4, 6 or 7, as at these points resistance is entirely short circuited. Observe the above rules and you will have no trouble with this most popular controller. How to Locate Trouble in a Reverse Switch, and how to Overcome it. In using the rheostat controller, your controlling cable often gets caught on the reversing cable, which throws it on the center, thus breaking the connection. This same trouble is liable to happen on double truck cars. The reversing cable being slack, gets caught on the truck, and when rounding a curve the truck will pull it on the center. A Motorman will do well to watch this closely. 24 In other and later devices of car con- trollers* the reversing switch is not so liable to trouble; but nevertheless do not fail to examine your reverse switch, in case your car is dead, for ofttimes the trouble lies there. Your reverse cable or rods, whichever your car may be equipped with, sometimes become broken or disconnected at the reverse switch, and you are unable to reverse your car with the reversing handles. Should this happen to you, get under your car to the reverse switch and pull it into the desired position with your hands, or perhaps you may have to use a pry to accomplish it. In either case, don’t fail to reverse it, for it will go to show that you understand your business. On roads of any length it is necessary for you to know how to reverse your car in spite and independent of your reverse switch. In some cases the reverse contact plates become soldered together, which makes it impossible for a Motorman out on the road to use it in any manner. If 25 such a case should happen when out on the road, and you could not use your reverse, proceed to disconnect your four brush leads from the brush holders and cross them, which will answer the same purpose as your reverse switch, and will carry you safely to the car house. If your car has only one motor, the same rule will work. Cross the brush leads and the car is reversed. This must be practiced only in extreme cases, such as are mentioned above, and must be done correctly. How to Reverse a Car in Order to Obtain Best Effects. How to reverse your car in case of accidents, to produce the best effects. As a general rule a Motorman, while running on the road, is not looking for an accident. In most cases where accidents take place, they come so quickly that the 26 Motorman is totally unprepared for them, and consequently, before he can grasp the entire situation, he has run into the object in question. From experience I have found the following mode of reversing to be most effective: When you see that quick action on your part is necessary to avert an accident, which compels you to reverse your motor, first, before pulling your reverse handle, pull your brake on with your right hand as far as it will go with one pull; which being done will retard the momentum of your armature, and will better enable it to receive the current when you throw the reverse. At the same time you pull on your brake, release the current with your left hand. By that time you have your right hand free to throw your reverse. Your left hand being on the controller, you turn on current. Turn on very little current, for } r ou can easily turn on too much, which would have the effect of throwing out the breakers at 27 the house, or blow your fuse. In either case your power is losfc: Turning on too much power would not have the desired effect, (if your fuse did not burn out, and the breakers at the power station remain intact)for the simple reason that it would send your drive wheels spinning on the rail without check- ing the momentum of your car. So it stands to reason that the slower your wheels turn, the better service they will render in stopping your car. In most cases where accidents cause a Motorman to reverse his car, as soon as he throws the reverse, he immediately turns his controller right on to the loop, which sets the wheels to spinning so fast that his car goes ahead without seeming to mind the reverse. Of course he is at a loss to know why she don’t hold. Some Motormen condemn the car and say it is the fault of the machines, when rightfully the fault lies with them. There are extreme cases where a Motor- man does not have evei: time to release 28 his current. In such cases a Motorman needs no enlightenment. All he can do is to pull his reverse. That will show that he is alive to the situation, and will save being censured by the Superintendent, who would certainly ask him why he did not reverse his car. A Motorman who has acted in that capacity for any length of time, has had it thoroughly drilled into him that up to this date, as a general rule, the brakes on electric cars are inadequate in cases of emergency. As the lives of passengers as well as his own safety depend solely upon his prompt action, he ought to be exceedingly care- ful, and prompt himself on every detail in connection with his reversing device, for unless you know how to reverse a car you will get very poor results. By thoroughly understanding the above method, you will have more chance for safety than if you go at it blind and by guess. 29 Points about Motors that should be Examined Often It is much cheaper to present accidents than to repair damages. The liability to accidents may be reduced and the profits of the road correspondingly increased by careful inspection of the apparatus at regular intervals, and this should be insisted upon. The saving in repairs will more than equal the cost of the in- spection. A Motor man should, on arriv- ing at the end of the road, examine cer- tain parts of his car without fail. To do this correctly, and feel safe when starting on your return trip that everything is in perfect working order, you will first examine your armatured bearings and see that the compound lubricating cups are filled, or enough compound in them to insure their safe running, for it is often the case that armature bearings become hot and melt the compound, which will soon wind you up in a disabled condition, 30 whereas timely inspection will prevent this trouble. The next part to be examined is your carbons or brushes. These very often become broken or cracked, which will cause them to arc, and if they are run in that condition for any length of time will cause your commutator to become so hot that it will short circuit, or may ground your brush holder. In either case your motor will have to be cut out of circuit. Brushes should make good contact with the commutator. Reach down and take out each brush in order to ascertain whether it moves freely in the brush holder. They should not bind, as this might cause poor contact. In putting brushes back, get the same brush in the same holder and have the same side up. They will make better contact if put back exactly in the same position as they were found. Notice the temperature of the field coils and armature. A loose or bro- ken connection might interfere with the proper distribution of current between 31 the two motors. Do not allow the fields or armature on one motor to become warmer than the other motor, for in such case it is doing more than its share of the work. If you cannot remedy the trouble on the road report to car inspector. The next part to be examined is your gearings. See that they are not running dry. Examine your wheel boxes, and if you find any of them running hot, lubri- cate them with oil. Next see that your brakes are perfect and that all shoes make good contact with the wheels. Next see that your trolley wheel is true with the trolley wire, and keep the wheel well oiled. The life of a trolley wheel will depend upon the quality of the metal of which it is made and upon the number of miles it travels. New wheels should be put in as soon as the wear of the old ones is suffi- cient to cause them to make a rattling noise when running, and to flash badly when passing the trolley supports. Wheels should be oiled every night or morning, and the Motorman should oil 32 them during the day if found necessary. The more frequently they are oiled the longer they will last. The tension of the springs in the base of the trolley should be sufficient to keep the trolley wheel firmly pressed against the wire at any speed which the car may reach. If there is a flashing between the wheel and wire when the car is running fast, this is caused by the springs being too weak, and they should be tightened. It has been my experience to see trolley wheels become hot, wear off, and drop to the ground, which causes any amount of trouble and annoyance; for in such case the conductor is compelled to mount the roof of the car and hold the trolley pole against the wire until the car house is reached. By timely and frequent inspec- tion this trouble can very often be avoided. Motormen having examined their cars as above directed will merit the approval of their superintendent, and have hon- estly discharged the duties of a first-class Motorman. 33 Short Circuits — What a Short Cir- cuit Means— How to Locate it. Perhaps there is no other electrical term so much used as the term short circuit There are a great many Motormen who have heard the term, but have never had it explained satisfactorily. As a conse- quence they call every little trouble that comes along a “ short circuit.” For example, during my employment on one of the most popular electric railways on the Pacific coast, of which I was foreman, I was called out on the road one night by one of the oldest Motormen. On arriving at his car, I asked the usual questions as to what was the trouble. His answer was. “I think there is a short circuit in one of my motors.” I examined the motor and found the feed wire which runs to the controller, burned off. As a matter of fact, his car was dead, and as he didn’t know what else to say in reply to my question, he gave it as his opinion that his car was “ short circuited.” 34 Now, one would not think that a man who had run a motor for three years, would be so ignorant of his machine as that, but nevertheless it is a fact. Now, there are different ways in which a motor can be “ short circuited;” but the term means that the current has been thrown out of its regular channel at some point before reaching its destination. For example, some of the lead wires come in contact with another wire, and the insu- lation becomes worn off, causing a “ short circuit,” and causing your motor to jump and jerk. It is always very easy to locate it, as it will cause an “ arc ” when the cur- rent is applied. Or you may have a short circuit in your armature, which will always show up in the same way. You can most always find it by having your conductor apply a little current while you raise the trap-door and watch your motor. Such short circuits are generally caused by the insulation being knocked off of one or more of the armature coils at the 35 point where the wire is bent over the end of the armature core, as it comes in very close contact with the motor frame or case during its rotation, and once it is bare, it takes but a short time to burn out a coil, and sometimes more, which incurs quite an expense to your company to repair it. You should use every effort in your power to prevent it, by releasing your current as soon as a jerk or jump is felt. Bo not proceed until you have found the cause of it. Again, if you should run through a pool of water deep enough to come up into your motor case, it will most invar- iably “ short circuit” your motors by making a contact clear around your com- mutator, which is supposed to be insu- lated, one bar from another. So, when you come to a pool of water on your track, always give your car speed enough to carry it through the water by gravity, or release your current before striking the water. Also open your overhead cut- out box thus preventing the current from 36 contact with the water, and you are usu- ally carried over in safety. There are a great many other things which might be mentioned on this sub- ject, but as space is limited, I think there has been enough said to teach you the difference between a short circuit and a feed wire being burned off. It comes in line, however, while treat- ing on cc short circuits,” to call your atten- tion to the trouble caused by your cur- rent becoming grounded, which acts in many cases much the same as a short circuit. Ground circuits are even more severe and effectual in causing your car to come to a sudden stop, or blowing the circuit-breaker at the power station, than a short circuit, for if any of your feed wires become bare of insulation, and should come in direct contact with any portion of the trucks, you will experience quite a sudden jar in your speed, which will lead you to think that you have run up against a brick wall, or something of that sort, and at the same time generally 37 knocks out a circuit-breaker at the power station, and blows the fuse in your car. ’In the majority of cases it is not a fre- quent occurrence, but nevertheless it occurs occasionally that your commutator becomes grounded onto the armature shaft. In such cases the motor thus affected will refuse to work. Sometimes it will cause a flash or “ arc,” but in most cases it will just jump and jerk, and you will see smoke arising from your motor casing. Should you have a car that is equipped with a single motor, in most cases it will not move when the current is applied, but stand still, and if you should allow the current to remain turned on for a minute or so, you will bo abl6 to smell that some- thing is burning. But in such cases, never try to run your car until you first cut out your motor that is grounded. Remember, as I have already explained to you, that while a short circuit is, in some ways, very much like a grounded circuit, and often causes very similar 38 effects, still they are two separate and distinct interferences, and should be handled with great care, as in either case you are liable to damage your motor ser- iously if you fail to cut out the disabled one before proceeding on your trip. Then there is burning out of field coils, which is quite a frequent occurrence on roads where there are heavy grades, or where high speed motors are used. This is caused, principally, by an over-taxation of the fields, which will cause them to become overheated, and this unnatural heat will, in time, cause the insulation on the field wires to become charred, which finally allows the current to jump across from one wire to another, thus causing a short circuit in the field, which will burn it out in short order. Now if your motor should show any of the above mentioned disorders, and you are not able to locate it at once, a very quick and reliable way to locate it is by cutting out one of the motors — that is if you have a car equipped with two. After 39 you have cut one out, try it by applying the current, and if you find that the one you have in circuit refuses to run, or jerks when the current is applied, then it is reasonable to believe that the trouble lies in that motor, and that the other one is all right. Cut out the disabled motor, and after cutting the other one in you may proceed to the car house. But I would not advise you to run any further than is necessary without first reporting the trouble at headquarters, as you are liable to damage the other motor by so doing, as you are now mak- ing one motor do the work that is intended for both motors to do. But if you should try both of your motors by cutting them out as described above, and find that your car still jerks, then it is reasonable to believe that your trouble is caused by a short circuit or ground in some of your wires. But you can usually determine as to that by the way she acts. 40 Information on Incandescent Light Circuits It may be of some value to you to know how to prevent yourself from being left in the dark in case your light circuit gives out on you daring your run, which is a very common occurrence. Every man who has ever worked on an electric road for any length of time, has either had his lights go out in his own car, or has seen some other car going along in total darkness. As we all know, it is very dangerous to run a car at night without a headlight, and it is also against the laws of most cities to do so. There- fore it behooves you to educate yourself on this branch of street railroading suffici- ently to be able to cope successfully with any little trouble which may occur to you while running a car. By so doing you will avoid being looked upon with disgust by your foreman or electrician in charge, as it is really disgusting to a house-man 41 to be called away from his work to go out on the road to fix a light circuit for a man who has probably run three or four miles without any light, and on investigating it finds that possibly the only trouble is a lamp burned out. All cars are equipped with a three-way switch. Should your lights go out on you, begin your investigation by trying your switch both ways. If your lights still refuse to work, then investigate the lamps on the inside of your car, for if it is one on either end of your car, or more properly speaking, if it is one of the hood lamps that is broken, they will light up when you throw your switch the opposite way from what it was when they went out. After trying your switch both ways and they still refuse to light, then take each lamp from its socket, and if you have no other light to see by, light a match and hold the lamp up between you and the light and you can see whether or not the carbon filament is burned off. Try each 42 one thus until you have found the one burned out — that, is providing the trouble is caused by a burned out lamp. Should you find one burned out, replace it with a new one if you have one with you. But if you have not do not give up and run in the dark. If your car is wired so as to cut out the front hood lamp of your car, then take out that lamp and put it in place of the burned out one, and when you get to the end of the line change the hood lamp from the front end of your car to the rear end, and thus you can run until turning in time without bothering the men at the car house for a lamp. But should your car be wired in such a way that all your lamps are burning at the same time, (except of course you always have a spare lamp in your headlight — that is if you use electric headlights) but that is too unhandy to change at each end, so take the lamp that has been burned out, break the glass globe and take the two small wires which lead through the butt of the lamp and twis/ 43 them together, and then you have what is called a plug. Keplace it in the socket where you took the burned out lamp from and turn on your switch, which will give you a much brighter light than you had before, as you now have only four lamps burning on your circuit, and of course your lamps burn at a higher volt- age. Now remember I only recommend this to be done in case of emergency, and you should always send word to the car house for them to send you a lamp as soon as possible, or get one from a passing car, as you are liable to burn all your lamps out by burning them at so high a voltage, if you do not replace the burned out one in a reasonable length of time. But I consider that it would be even more reasonable, and meet with a more universal approval, even should you burn out all of your lamps, than to undertake to run in the dark without a light, and thereby cause the death of some human being, or even smash a wagon. 44 Here is another little point that may become useful to you in locating trouble in light circuits. After you have examined all of your lamps and have failed to find any of them that show anything wrong, then examine your light circuit switch, as one of the contact plates may become twisted or bent out of place. If you find such to be the case, pull down your trolley and take your screw- driver or your pliers, and straighten it out so as to make it come in contact with the revolving portion of the switch, then all is O. K. But if you find your contact O. K., then examine the wires leading into the switch, and see that none of them are broken or burned off. Next go on top of the car and see that the connection at the trolley base is not broken off. Then follow the wires along the roof of car, as in some cases the trol- ley will jump off while running at a high rate of speed, and strike a span wire and rebound to the roof of the car, the flanges of the trolley wheel strike one of the 45 small wires and cut it so as to cause it to burn off after a little. If* after all this, you fail to find anything wrong, (of course always ascertaining that the fuse is not gone,) then you should return to the lamps, as you are most sure you will find the trouble there. Often a lamp will become useless and refuse to illuminate, and still the carbon or wire in it will look all right. An incandescent lamp must be air-tight or it is no good; and sometimes a lamp that is not perfect in construction will work all right for a time and then all at once will become useless, caused by a small leak somewhere around the butt where the globe is fastened to it. You can locate a lamp that is disabled in this way by taking a lamp out of the socket and take your screwdriver and make a connection in the socket by placing your screwdriver so as to touch both sides of the socket at once. Any kind of metal will do if you have no screwdriver. When you come to the affected lamp and remove it and 46 make the contact in socket, as above described, the rest of your lamps will light up. Then you can fix the disabled lamp as described above. By following up these instructions you will seldom be compelled to call for help in case of trouble with your lights, nor will you have to run your car without lights. An incandescent light circuit is a very simple thing, and you should learn enough about it to be able to care for your lamps, as there is seldom anything seriously wrong with them. 47 Electric Motor Force, or How Ar- mature Rotation is Obtained, etc. During my experience as foreman of different electric car houses, I have had the question asked me hundreds of times by Motormen, as to how the “rotation of an armature was caused. It is a ques- tion that is frequently asked by men who are ambitious to learn, and it is a ques- tion you seldom can secure an answer to. And while I do not consider myself com- petent to give you a very thorough ex- planation of it, still I will endeavor to give you an idea sufficiently plain to en- able you to understand how it is accomp- lished. All magnet bars have what is called a north and a south pole, or, more plainly 48 speaking, a positive and a negative end. One end is the positive, the other the negative. If you take two straight magnet bars and place them on a stand with the bear- ings exactly in the center, so that they will swing on this pivoted stand, then place them as close together as you can, so as to allow them to pass each other without striking; then place them at right angles to each other, give them a little start and you will find that they will con- tinue to revolve, as the north pole of one will draw the south pole of the other, and when the two opposite ends come to- gether, the speed of the bars (together with their weight), will carry them on past each other, and then the two opposite ends are acted upon in the same manner, and in that way motion is kept up. When a heavy current of electricity passed from the trolley wire through the coils of insulated wire which surround these magnet bars, to the ground, the 49 attractive power of the magnet bars is greatly increased. I give this illustration to start with because it is so simple; and still it may assist you to comprehend the principle of armature rotation, as the armature rota- tion is also procured principally from magnetism, and all magnetism is on the same principle, although it may be brought about in entirely different forms. In a motor of the single reduction type there is but one field coil. This field coil, (which is the magnet coil), is placed around what is termed the pole piece. This pole piece is placed on the inside of the motor case, and is as near the arma- ture as will permit its rotation without causing friction. The current passing through this coil which is wound around the pole piece converts the pole piece into a very powerful magnet. The cur- rent passing through the armature also causes it to become magnetized, and the positive side of the armature is attracted or drawn to the pole piece. I say the 50 positive side of the armature because one of the brushes is the positive and the other the negative, all the time, and con- sequently the corresponding side of the armature is the same. Now, I have given you an illustration of how the negative side or end will attract the positive end of a bar, and the same rule will apply to the rotation of an armature; and the power of a motor is obtained, to a certain extent, by the field magnet having the advantage over the armature, by having a leverage on the pinion which is connected to the ends of the armature shaft, which works on the large gear wheel on the axle. This lever- age can be ascertained by measuring the circumference of the pinion and the cir- cumference of the armature, as the differ- ence in size is the amount of leverage which the magnetism of the field coils and the armature combined has over the pin- ion; and then another reduction in the draft is made in the difference between the size of the gearing. Without the ad- 51 vantage of this leverage, the electric motor force would be insufficient to pro- pel the cars. This illustration has been given with a view to make it as plain to you as possible how electric motor force is obtained. Realizing, as I do, that heretofore any explanation pertaining to this subject has always been kept beyond your reach, I have thought it best to make it as plain and simple as possible, that men with a limited amount of comprehending ability may be able to grasp the idea. 52 How to Increase the Speed of a Oar by Changing two Connec- tions. It is the ambition of every Motorman to understand thoroughly every little detail in connection with his car, and while it is my intention to impart to them in full everything practical and possible it will be better for them not to practice the following, as I am only giving this as information, and “ where ignorance is bliss, ’tis folly to be wise.” As I have hinted before, what you learn keep to yourself, as in most cases proffered infor- mation creates a very disagreeable odor. I feel as though my readers ought to be lenient with me, and not practice anything that I impart to them that is intended 53 only for information, or that which is calculated to educate them in their line of work. Motormen understand that the speed of a motor is gauged by the winding in the armature and the size of the gearings. While this is true, there is still another and simple way of increasing the speed of your car by disconnecting your ground and end wire from your terminal board, or more plainly speaking, from the field coils, and cross them and connect again. That is, connect your end wire in the ground wire place, and the ground wire in the end wire place. Remember that the end and ground wires are the outside wires, the middle one being the loop. This being done correctly will increase the speed. 54 General Information on Westing- house Motors. As there are a vast number of these popular machines in use in the United States, I feel that this little book would not be complete without treating upon a few of the most important points; and if you practice the following instructions, you will be able to handle a single reduc- tion Westinghouse motor with perfect safety. The Westinghouse electrical equipments for a car consist of the mot- ors, controlling stands or platform switches, two overhead cut-out switches, diverters, motor cut-out, lightning ar- rester, fuse block, trolley, lamp circuit and wire cables. Motormen and conduc- tors should be thoroughly familiar with the equipments, so as to be able to suc- 55 cessfully cope with any trouble that may arise while on the road. There are five points or notches to the controller, each of which gives a corresponding speed. It is not necessary to look at the switch when operating it, for the notches are determined by feeling only. On the first notch the four sections of the diverter, the field coils and the armature are all in series. The succeeding notches cut out the diverter sections in their order as numbered, and the fifth notch leaves only the field coils and the armature in the circuit, and gives the highest speed. The upper and lower bearings of the cylinder and the small wheel at the upper end should be oiled occasionally. Use very little oil, and don’t allow it to run down on the cylinder. The cylinder contacts, or rings, should be rubbed off and very slightly moistened with grease to keep them from becoming dry and cutting. The Westinghouse controllers are con- structed and designed to give the car a forward motion when the handle is moved 56 from “oft” in the same manner as the hands of a watch go; and if they do not do so, it is because they are connected up wrong. Moving the controller in the opposite direction reverses the car. In cutting off the current, be very careful not to throw the handle beyond “ off ” position, as this would reverse the mot- ors, The handle of the controller should always be at “off ” position when the car is standing still, even if the trolley is not on the wire. When one switch is in use, the other one should be at “ off.” Don't try any experiment to see what would happen if both switches were used at the same time. Before placing trolley on the wire, always examine both switches and see that they are at “off” position. Always leave switches in this position and remove handle when leaving your car. If at any time the controller should not work freely, pull down trolley and remove cover of controller. An inspection will probably show the trouble due to the want of oil, roughness of contacts, or something of 57 jxind. To start tbe car forward, .^row the handle to the left from “off” to the first notch. Allowing the car to start before moving to second notch, make a pause and then move to third, and so on. Do not move suddenly from “ off ” to second notch. To run backward observe the same rules, but move handle from “ off” to the right. Be careful to throw handle to first notch with the first move. Do not merely move it far enough to make contact, as it will burn your cylinder contacts and make your control- ler work hard. Never reverse your motors when the car is running forivard , except in cases of extreme necessity, such as avoid- ing a collision, or to save life. If there is not time to stop your car with your brakes, reverse to the first or second notch, and keep the handle there until your car begins to move backwards. Don’t move it beyond the second notch, for then the wheels might spin around backwards, and your car would not stop as quickly as if they kept revolving in a forward direction. 58 Reversing is a severe strain on the n and should not be resorted to except wli^ absolutely necessary. When switching on current, never jump notches. For instance, do not throw the handle from the first notch to the third, without mak- ing a pause at the second, but when switching the current off, throw the handle quickly and with a single motion to “off” position. Don’t go beyond this point, however. When going up grade, it is advisable to work at the fifth notch most of the time, as this is the most econ- omical position; and besides, the diverter coils are not designed to be used contin- uously when the car is heavily loaded, although they will stand it with safety for a considerable time. Go through all curves slowly, using first or second notch. It is better not to stop on very heavy grades or in curves, if it can be avoided. Run slowly through flooded places in the track, and when examining motors, never allow water to drip from your clothing or hat upon the motor. And always re- 59 member that any electrical trouble can be quickly stopped by pulling the trolley down or by throwing overhead switch. The Westinghouse company have a very simple and easy device for cutting a motor out of circuit. They recognized the fact that the old style of disconnecting wires sometimes confuses Motormen, and have equipped their motors with a cut-out device, which is located inside the car, under the seats, about the middle of the car, a small trap-door being cut in the panel of the seat to permit it to be easily reached. You will find two plugs, pulling out either of which will cut out the motor on the respective sides. That is, pull out the plug nearest the motor that is to be cut out, and your motor is dead. 60 Westinghouse Fuse Block. A fuse is placed on the car as a protec- tion to the motors. This fuse is connected into the wire running to the trolley, and is situated in any convenient position on the car. The fuse is not intended to melt or blow with ordinary, or even heavy loads, but is inserted as a precaution in case any of the wires of the car should become grounded or crossed. The capacity of this fuse should be deter- mined usually by the conditions of the road. Extra fuses should be carried on the car in a convenient place, and also a screwdriver, if the latter is required to replace a fuse. Before putting in a new fuse, pull trolley down from wire. With a single motor equipment use a 50 ampere fuse; with double equipments use a 75 ampere fuse. Always pull trolley down when working at the switches, lamp cir- cuit, lightning arrester or fuse block, as you are absolutely safe if you take this precaution. 61 The Westinghouse Lightning Arrester. Being* entirely automatic in its action, it requires no adjustment after each discharge. Tt should be examined, however, after each storm as a matter of precaution. By remov- ing triangular plate which closes the front of the arrester, the whole interior may be in- spected. The swinging arms must pass freely through the holes into the air chamber, and the carbon tips should touch the carbon blocks, and when pressed in, should move them one-sixteenth of an inch before the flange strikes the marble. The air space be- tween the toothed carbons should not be more than one-sixteenth of an inch. The screws should be firmly set, especially those holding the plate on the window in the air chamber. 62 Westinghouse Lamp Circuit. The lamp, or lighting circuit of the car usually consists of five 100 volt lamps connected in series. Where oil head lights are used, three lamps are in a group in the middle of the car, and one on each platform. In this case a small double break switch is provided for cutting the current off from the lights. Where elec- tric head lights are used, each platform lamp is connected in multiple with a head light connecting block; and a two-way switch inside of the car makes it possible to throw either the platform lamp or the head light into the circuit. The lamps may sometimes refuse to light. This will probably be found to be due to one of the following causes: a broken or burned 63 out lamp, poor contact between one of the lamps and its socket, poor contact in the switch, a loose or broken wire, or a blown fuse. The remedies being, in the first case, to replace the defective lamp with a new one; in the second, to try every lamp, pushing it more firmly into the socket; in the third, to remove the cover of the switch and tighten contacts. If the trouble is not found to be due to any of the above causes, you should resort to the advice given in another part of this book, under the heading of “ Information on Incandescent Light Circuits,” which will help you out of your difficulty. 64 Information on Open Circuits and Sparking Brushes. The sparking of brushes will not be noticed if the armature brushes and brush holder are in good condition. If there is any sparking it may be taken as an indication that something is wrong, and may be due to any of the following causes: poor contact between the brushes and the commutator. See that there is no looseness about the brush holder, and that the springs exert proper pressure. The brushes should fit closely upon the commutator, and not make contact only at one corner. See that the brushes are not wedged in the holders, that the com- mutator is clean, and that good brushes are used. An open circuit in the arma- 65 ture connections of one motor will cause a heavy current to pass through the other armature, and this may produce a steady flare of the commutator. A weak mag- netic field, caused by open circuit or short circuit, or wrong connections in the field coils, will also produce a steady flare, due to the heavy current. If the field circuit of a motor is not complete, owing to a broken wire, a very heavy current will pass through the armature, sufficient to blow the fuse on the car or to burn out the armature. An open circuit in the armature will produce a greenish flashy which will appear to run around the com- mutator; while a short circuit in an arm- ature will be made evident either by the fuse blowing, or by a jerky motion of the car. If allowed to go on for any length of time, two bars of the commutator, about 1803 apart, to which the ends of the open circuited coil are attached, will gradually burn down flat, and the insulation between them and the adjacent bars will be par- tially destroyed. 66 The marks on the commutator will serve to show which coil has the open circuit, and this should be corrected at the ear- liest possible moment. There are two ways of doing this, one being to replace the defective coil with a new one, the other being to put on a jumper. To do this, the canvas cap at the commutator end is removed, the two ends of the defective coil disconnected from the com- mutator, and an insulated wire of the same size soldered into the two bars, thus connecting them directly together. The coil itself is not disturbed, the ends merely being cut off and insulated. This will not visibly affect the running of the motor, and this jumper may be left on until it is convenient to make more com- plete repairs. A flat bar, or bars, will cause sparking and blackening of com- mutator, and should be remedied as soon as found, by smoothing down with a file, or turning the commutator off a slight cut and smoothing with fine emery cloth. 67 Some Questions Which You May toe Called Upon to Answer. As it is an assured fact that all Motor- men running electric cars must sooner or later pass an examination before a Board of Examiners, I will now give you a syn- opsis of the questions you will be asked, and the answers, all of which you will find in this book. “ Forewarned is fore- armed/’ So, if you fail in the examina- tion you will have no one to blame but yourself, for they cannot ask you anything that does not actually pertain to your car and its workings, as you are not paid to know anything not pertaining to your car. G8 Some of these questions require very lengthy answers, but are very simple when you learp them by heart, and by a very little study on your part there is no reason why you cannot pass an honorable examination. You will be asked to define in part the term “ short circuit,” which has been sufficiently treated in this book. You will be asked what causes elec- tricity to heat. There is only one proper answer to this question, and that is “ resistance.*’ Electricity must be resisted in order to cause heat. You will be asked to explain the term* “ ground ” or “grounded,” and its causes. This has been explained in another part of this book. You will be asked what kind of motor you are or have been running, their names, and the amount of electricity they are built for. This you will have to learn from your Superintendent or the elec- trician in charge, as I have no means of 69 knowing what particular make of motors you are running. You will be asked in case you could not reverse your car with the reversing device, what you would do. This question has also been fully treated of previously. You will be asked in case certain parts of your car should become disabled, what course you would pursue. This question you could answer correctly by memoriz- ing the teachings of this book. You will be asked to trace out the cur- rent, beginning at the trolley wire and ending with the ground wire, naming every part of your car and motor as you proceed. As I have been very careful and accurate in my explanations of the current tracing, you have no reason for not being able to answer correctly. You will be asked what you would do in case your car becomes groundedbe- cause of dirty rails. Most Motormen can answer this question, but for the benefit of those who have not had experience, I will say: connect the rail with any part 70 of your wheel or truck, with a piece of wire or any piece of iron you may have handy, and your car will start. All that is necessary is to get a clean connection with the rail. * You may be asked what you would do in case your controlling cable should break on a car equipped with a rheostat controllor, and you were unable to use the controlling device. The answer is, throw off one of your overheads and gather up your broken cable and tie it up so that it will not come in contact with any other working part of your car. Then pull your traveler one-third of the way around on your rheostat, and control your car with the overhead switch. Take advantage of all down grades and run by gravity, so as not to heat your rheostat any more than possible. The traveler left in one place on the rheostat for any length of time, will become red-hot, and consequently burns out the resistance. You will be asked how you determine 71 how many miles per hour you are travel- ing. This question will be asked for various reasons. For instance, in case of an accident that would result in the Motorman’s arrest, he would be called upon to state the rate of speed he was running at the time of the apcident. The manner of determining the rate of speed a car is traveling, is very simple. All you have to do is to count the number of rails you pass over in twenty seconds, and it gives you the number of miles per hour. You also have orders from your Super- intendent not to run faster than a certain rate of speed over different parts of the road, therefore you should keep this rule in mind. Other questions may be asked you, all of which you can easily answer by keep- ing this book constantly with you and by frequently referring to it. 72 t -xo M CM 3 J 2 i/> u u g * . a «iJ 2 e* £ ^ o 6 S g> § c« i-4 .S . i-4 D C * s|-a p 4 S h 3 01-0 O , 5 j • 3 ■m C/2 ^ o ™ 3 ’5 5 0 2 w *, ^ c “ ^ ^3 *55 i_ ] 01 .SP £ « « £ Pi 2 OOUIIL Conclusion. In writing this book it has been the authors intention, as has been previously mentioned, to confine himself exclusively to the working of street R. R. motors and while I have not endeavored to ex- plain each different type of motor (of which their are a great many) separately, still I think I have given you just such information as you need, and such as you have been searching for in vain. This book has been written so as to be utterly devoid of all theoretical or scien- tific explanations, as it is not intended for that class of men. It is gotten up for Motormen only, written in Motormen’s phrases, and confined to the principles of these most popular machines, and as the fundamental principles of all street R, R. motors are controlled by the same rules* I think I am giving you something in this book that will prove beneficial to you no matter what type of motor you may be handling. And as a conclusion I would say that, if you will commit the contents of this little book to memory, and allow your- selves to be governed by its teachings, that you will, in the majority of cases, meet with success in your attempts to locate and overcome little troubles such as most frequently present themselves to you. And in connection with these teach- ings, keep yourselves familiar at all times with the rules and orders of your superintendent, (which are usually posted on the bulletin board), and there is little doubt in my mind but what you will be able to gain the endorsement of any su- perintendent in whose employment you may be, and at the same time you need not fear the consequences of any examina- tion which you may be subjected to as to your ability as a Motorman. In writing this edition it is the author’s intention to make it indispensable to every man running an electric car; to make his duty more of a pleasure than a task. As the author has served as an em- ployee of several different companies, and in all capacities, he feels competent, and at the same time it is his duty to com- municate to street railway employees the following method of behavior and obe- dience to their employer. Speaking from experience, if you follow these suggestions, you cannot fail to hold your position. It is true that companies owning and operating electric railways are becoming very strict, and consequently keep their employees in a state of constant fear of being discharged, which makes their duty doubly arduous. Every time an obnoxious order is posted upon the bulletin board, or an order that will seemingly make their duties more unpleasant, there is a general kick among the men, and knowing that they have to submit or step down and out, puts a rov- ing disposition into their heads, thinking they can find another road that is not so strict. But this is a mistake, for you will find them all the same. Nine-tenths of all the men running on cars are always looking for and trying to locate the superintendent or his assistant, and I don’t know of a case where any good came of this, for if you know the exact location of these distinguished gentlemen, you will commit yourself a thousand times to a spotter, thinking you are O. K. The ends of every street car line are seemingly left unguarded, and are, so far as the superintendent is concerned. But don’t forget that he has the means of knowing every move you make, while you think you are safe. Therefore, if you wish to retain your position, or even if you do not wish to retain it, you had better adhere to the following rules, and you can always obtain another position in case you wish a change. Kemember that when a com- pany employs you, it does not only em- ploy you to run its cars, but to run them according to its plans and dictation, and knowing that you have to conform to its rules and regulations or leave, I will say go to the bulletin board and familiarize yourself perfectly with all rules and orders, and when you start out of the car house with your car, you do so with the knowledge that you are going out to work for your family or yourself, at so much an hour, or a monthly salary, as the case may be. Go out resolved to live up to every order and rule laid down by the company. Lay all ideas and notions of your own of running a car aside, and adhere strictly to their way, and the way they pay you for. By so doing you have dispensed with all fear of being discharged for dis- obedience of orders, for they certainly cannot discharge you for obeying their own orders. If you discharge your duties accord- ing to this doctrine, you can face the Su- perintendent at any time without fear of having incurred his displeasure. If you should in the discharge of your duties commit yourself, or do something that you feel that you are to blame for, at your first opportunity go to the Sup- erintendent and tell him the exact truth of the matter, or trouble in question, and if there is a spark of manhood in him he will set you right by requesting you to be careful in the future. THE Mechanical Arts Simplified 500 Pages New and Improved Edition Edited by D. B. Dixon Appropriately Illustrated A Thorough and Original W ork of Reference f or Architects, IronWorkers, Ice Makers, Boiler Makers, Contractors, Civil and Mechanical Engineers, Firemen, Foremen of Machine Shops, Etc. .....FOR THE....# USE OF WORKERS IN ALL TRADES The New, Enlarged Edition contains, besides other ......valuable matter, many ...... 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Laird & Lee’s Vest-Pocket Practical Compend —OF— Electricity ELECTRICITY EXPLAINED IN ALL ITS Branches and Applications Thoroughly Plain and Practical Language 119 Specially=Engraved Illustrations The very latest Inventions in this Great Science Wireless Telegraphy, X Rays, Trolley and Underground Motors, Dynamos, Telephone, the New Phonogragh, How to Wire and Light Houses and Estimates of Cost, Electricity Applied to Medicine and Surgery, Vocabulary of Technical Terms, etc. The first work of its kind ever attempted. In fact and name a 20th CENTURY BOOK. Cloth, special design, 25c. Full leather, full gilt, 50c. LIVE, ENERGETIC AGENTS Wanted in every locality to sell this splendid book. Liberal terms on application. For sa 1 e everywhere , or sent, postpaid, on receipt of price , by LAIRD & LEE, Publishers, 263-265 Wabash a ve., Chicago The Mechanic's Complete in one 576 pages,„illustrated Mechanics inaNutshell Statistics of all Kinds# Rules, Processes, Tables, Data of Untold Value. Curious Facts Greatest Buildings Described, Glossary of Technical Terms, How to Make Batteries, Etc. Etc, THE VERY LATEST INFORMATION In Twenty Different Trades With each book we give a copy of our copyrighted Chart for Setting Gear Teeth PRICES Handsomely bound in silk cloth, red edged, head banded,,, $1,00 Full morocco, marbled edges, head banded,,, $L50 ••Wouldn’t sell it for $10.00 if I couldn’t replace it.” —Engineer in a Chicago Skyscraper- EDISON J S Handy Encyclopaedia ...OF... General Information Contains 512 pages cram full of facts on over 2,000 subjects, and will be found to be of great value and practical utility to Merchants, Bankers, Lawyers Bookkeepers, Politicians, Lum« bermen, Physicians, Surgeons, Farmers, Printers, Real Estate Men, Manufacturers, Engineers, Masons, Carpenters, Chemists, Scientific Men; also in the Home, on the Farm, and in the Factory. Its Mechanical Department is of Special Value, as it Contains Rules, Processes, Trade Secrets, Methods and Calculated Results for Mechanics of Every Trade. PRICES: Bound in Limp Cloth, 25c. Bound in Stiff Cloth, Gold Stamped, . 50c« LAIRD & LEE, 263 Wabash Ave., CHICAGO, Standard Works The New Century Standard Letter-Writer For Business, Family, and Social Correspond= ence. An entirely original and practical work of inestimable value to all. Illustrated. Cloth, 75c. Boards, cloth back, 50c. Vest-Pocket Practical Compend of Electricity Electricity in all its branches and applications de- scribed in plain and practical language. The very latest discoveries. Methods and estimates for wiring and lighting houses. £3 illustrations. Silk cloth, 25c. Full leather, full gilt, 50c. Edison’s Handy Encyclopedia 1901 Edition. Thoroughly revised to date. Election results, Census matter, etc. Two thousand subjects of highest value to all, Carefully classified. Evety coun- try in the world fully described. More than 500,000 Sold. Limp cloth, 25c. Silk cloth, gold stamped, 50c. The Modern Webster Dictionary An entirely new book. Printed from new type. 60,000 words and definitions. 432 pages. Illustrated. Handy School Edition. Strongly recommended by college presidents and superintendents. Full cloth, 25c. Stiff cloth, indexed, 50c. Leather, gilt, $1.00. Stevens’ Mechanical Catechism Machinery and Toots fully described. Questions and answers for civil service examination. Indispens- able to engineers and mechanics. New and up to date. Cloth, $1.00. Leather, $1 .50. AGENTS WANTED f? raos . t compete line of Dictionaries, Mechan- EYERYWHERE ical, Technical and General Ref- erence Works on the American market. Steady employment for all who wish to help themselves. No experience required. Write for terms and description of 30 other titles. 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