Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 962
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 speedy 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 I 934 Steam Engineering feasibility of…
