Cyclopedia of locomotive engineering, with examination questions and answers; a practical manual on the construction care and management of modern locomotives . er minute as possible, unless thecopper electrode burns off, when it should be reduceduntil the copper electrode does not burn. The Lamp. (Fig. 215)—is simple, durable and re-liable, and after a fewtrials it becomes an easymatter to trim the lamp inthe dark, should occasiondemand. In putting inthe top carbon, it is muchbetter to remove the car-bon holder from the slide.After securing the carbonin the holder, take it be-tween the thumb

- Image ID: 2AXFB5P
Cyclopedia of locomotive engineering, with examination questions and answers; a practical manual on the construction care and management of modern locomotives . er minute as possible, unless thecopper electrode burns off, when it should be reduceduntil the copper electrode does not burn. The Lamp. (Fig. 215)—is simple, durable and re-liable, and after a fewtrials it becomes an easymatter to trim the lamp inthe dark, should occasiondemand. In putting inthe top carbon, it is muchbetter to remove the car-bon holder from the slide.After securing the carbonin the holder, take it be-tween the thumb
The Reading Room / Alamy Stock Photo
Image ID: 2AXFB5P
Cyclopedia of locomotive engineering, with examination questions and answers; a practical manual on the construction care and management of modern locomotives . er minute as possible, unless thecopper electrode burns off, when it should be reduceduntil the copper electrode does not burn. The Lamp. (Fig. 215)—is simple, durable and re-liable, and after a fewtrials it becomes an easymatter to trim the lamp inthe dark, should occasiondemand. In putting inthe top carbon, it is muchbetter to remove the car-bon holder from the slide.After securing the carbonin the holder, take it be-tween the thumb and fore-finger and with the re-maining fingers resting onthe guide put it in place.If desired to clean the re-flector remove only thetop guide by loosening the thumb nut at the end ofthe upper arm, then remove the guide carbon andcarbon holder. The tension spring in the lamp is for two purposes.It brings together the points of the carbons, so as toestablish the arc when the dynamo is set in motion, forthere must be a complete circuit before there is anycurrent. If the carbons are separated only a smallfraction of an inch, the lamp will refuse to work,. Figure 215 434 LOCOMOTIVE ENGINEERING because the current will not jump across the separation.Sometimes there will be a deposit of scale on thepoint of the lower copper electrode which preventsthe top carbon touching the copper, and as the currentwill not go through this scale there will be no lightuntil this is removed. See that the point of copperis clean before each trip. Suppose all wires areconnected and the lamp properly trimmed, turn onsteam and set the armature in motion. The currententers the lamp and passing through or around thesolenoid magnet draws down the iron armature. Thisin turn separates the carbons, thus forming the arc orlight. It will be noticed that the spring is secured tothe end of the lever toward the carbons, or on theopposite end from the magnet and pulls against it.This prevents the solenoid from pu

Similar stock images