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 258
nically-Operated Type.When an alternating current is used for operating the elevator, differ-ent types of motor and controller are necessary. Only two- andthree-phase motors have been found applicable to this problem, asno succ/:ssful reversing alternating-current motor of the single-phasetype has… … 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…
Electrical engineering
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