Cyclopedia of applied electricity - a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric (14593681510)

Identifier: cyclopediaofappl05amer (find matches)

Title: Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc.

Year: 1916 (1910s)

Authors: American Technical Society

Subjects: Electric engineering

Publisher: Chicago : American Technical Society

Contributing Library: Northeastern University, Snell Library

Digitizing Sponsor: Northeastern University, Snell Library

Text Appearing Before Image:

is not liable tooccur, nevertheless, as an addi-tional precaution, safety hooks arearranged so as to act in case thewheels should leave the wires. Thewheels of the carriage serve, ofcourse, as collectors, and by the useof two wheels on each wire all spark-ing is eliminated. Connection be-tween the trolley carriage and thecar is established by means of aflexible cable. This cable is attachedto a vertical pole on top of the carand to a drum mounted in thevestibule, Fig. 8; by means of stiff springs which operate this drum,the cable is kept under a certain tension and at the same time a largeradius of action is provided. It is possible by this arrangement forthe cars to run out of their way 30 to 35 feet on either side, thususing the whole width of the street and passing vehicles withoutdifficulty. The cables are further provided with plugs by means ofwhich the trolley carriage and cable may be detached from their cars.It is possible, therefore, if two cars meet on the same circuit, for

Text Appearing After Image:

Fig. S. Details of Trolley CableWinding Drum 388 TRACKLESS TROLLEY TRACTION 9 the plugs to be pulled out and the carriages exchanged, with but aloss of about ten to twenty seconds of time. It is sometimes noteven necessary for the cars to stop, the cables being exchangedwhile the cars are running by virtue of their own momentum. Motors. The motors of these cars are unique and very inter-esting, being entirely embedded in the wheels or, more properly, theythemselves make up the wheels, for the field magnets of each motorare the hubs of the wheel and the armature rotates around them, Fig. 9.The motors are of the direct-current series-wound type, of about 20

cyclopedia of applied electricity 1916 book illustrations electric power history of technology engineering electricity electric engineering encyclopedias and dictionaries images from internet archive

1916

Northeastern University, Snell Library

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public domain