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. (1916)
American Technical Society · Chicago : American Technical Society · leaf 160
irbiiie Interrupter large lead plate is made the negative i)ole, this action interruptingthe current periodically when the device is connected to a source of40 to 80 volts. Fig. 27 gives an idea of the device, showing one ofthe many modifications it has undergone in its commercial design.The… … RADKrrELEGRAPHIC APPARATUS 45
Electrical engineering
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