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 299
ring. This system has been in useto a limited extent for some years. ELECTRIC CRANES 2,953 Collector Gear,—To convey current from the mains to themoving crane a collector gear, generally similar to that used forelectric tramway work, is employed. For overhead cranes copperwires about one-quarter to… … Figs. 4,233 to 4,235.—Niles crane construction: Contact type limit switch. It consists of aworm wheel with machined teeth actuated by a turned steel worm which is attacheddirectly to the hoisting drum shaft. The body of the switch has heavy soapstone sidesbetween which are located the worm and…
Electrical engineering
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