Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise .. (1916)
Swingle, Calvin F. (Calvin Franklin), b. 1846 · Chicago, F.J. Drake & company · leaf 972
the load in the elevator car, hence good stops under allconditions are easily obtained. To meet the demands in districts where alternating cur-rent is in use, the same apparatus described is furnished Electric Elevators 937 except that the direct current motor and controller giveplace to an… … Fig. 384 otis alternating current double screw traction machineDesigned for Basement Installations stallations. The brake is slightly different in appearancebut performs the same functions as does the direct currentbrake. The safeties used on the Otis Traction Elevators arefound on the geared…
