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 968
atures of comparatively low cost. The usual safety devices installed in connection withmodern high grade apparatus are used with this type ofelevator, including speed governors, wedge clamp safetydevices for gripping the rails in case of the car attainingexcessive speed, and potential switches.… … Fig. 382 OTIS DIRECT CURRENT TRACTION MACHINE FOR OVERHEAD INSTAL-LATION ing the cables direct from the motor without the interven-tion of retarding rigging, showed so conclusively the meritsof that principle that the question naturally arose as to the 934 Steam Engineering feasibility of employing…
