Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 295
crew, or it can be ar-ranged to be operated automatically by the load. ELECTRIC CRANES 2,949 The brake is released by running the motor in the directionfor lowering. As the motor releases the brake, the load tendsto put it on again; consequently the speed of descent dependsupon the speed of the… … Fig. 4,228.—Niles* crane construction: Mechanical load brake. It is of the double disc typewith hard bronze wearing surfaces. It is automatic in action and self-contained, allthrusts being taken up within itself. The brake will not permit the load to run downunless the motor is revolved by power in…
Electrical engineering
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