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 259
176 ELEVATORS therefore, the makers have resorted to mechanical means for operat-ing the brake and switches on the controller, while the cheaper andslower types are operated by hand cable or lever device at the car.An electric engine of this type, Fig. 130, corresponds in everyrespect to that shown… … Fig. 130. Freight and Passenger Machine for Alternating CurrentCourtesy of Kaestner and Jlecht Company troller 2, also shown in Fig. 131, are mechanically operated and themotor is of the alternating-current type. To operate the controller, one-quarter revolution of the operat-ing sheave 3 causes…
Electrical engineering
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