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 292
d thegrab, after being lowered a given distance, discharges it contents. Themotor is again reversed, thus hoisting the grab upto the carriage, to whichit locks itself and frees the trigger. 2,946 HAWKINS ELECTRICITY On reversing the motor, the carriage runs down the beam, and atthe bottom end is… … Figs. 4,222 to 4,224.—Northern low junior and express type electric crane, floor controlled.Figs. 4,222 and 4,223 showing over mounted trolley; fig. 4,224, under mounted trolley. Ans. From one-half to one minute. Ques. What is the grab load? Ans. From one to one and one-half tons. ELECTRIC CRANES…
Electrical engineering
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