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 300
he fact that theone revolution tor with Spring Utiurn of the motor, the 262 ELEVAT^ORS 213 drum being keyed directly on the armature shaft, which is extendedfor the purpose, and an acUHtional or outside bearing provided forits support. A machine of this type is shown in Fig. 168. A motor of… … Fig. 168. Gearless Traction Elevator -nith One-to-One RopingCourtesy of Otis Elevator Company speed. A motor running at either of these speeds and a drum of,say, 34-inch diameter will produce a car speed of from 300 to 450f. p. m., and with a little higher motor speed, say 60 to 70 r. p. m., acar…
Electrical engineering
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