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 241
ally thetension spring only is in operation. When the trolley rope is jerked,a centrifugal force is applied to a weight or governor which connectsthe reel with the retrieving spring and releases the latter. Whenthe trolley wheel is replaced on the wire the conductor draws out therope and winds the… … Fig. lOS. Trolley Catcher with Spiral Groove Heaters. Electric cars are heated by electric heaters (coilsof wire of fairly high resistance) and by hot water. The formermethod, although wasteful of power, is preferred in city cars onaccount of its convenience. Electric. Electric heaters are of the…
Electrical engineering
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