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 268
Fig. 4,192.—Tandem worm drive machine with independent concave face gears meshing withthe worm as shown by the portions of the larger gears cut away above the worms. Asshown, there are four gear wheels bolted together in pairs, the two larger ones meshingwith each other, and the two smaller ones… … worms- fig. 4 193.—Reedy tandem worm drive. This type differs essentially from the single wormdrive in that intermeshing right and left hand gears are used in place of the single gear.The use of the double gear has the advantage of dividing the pressure between the wormand gear so that greater…
Electrical engineering
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