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 282
t wheel. As the largegear turns counter-clockwise, the finger A rides on the ratchet,gradually drawing the hammer away from the bell against thetension of the hammer spring. As the finger rides off the pointB, the hammer is suddenly released and strikes the bell a powerful ELECTRIC BELLS 2,373… … multi-strike: position manual control leverone strike position SPRINGCONTROL LEVER PIVOT --DETENT WHEEL LARGEGEAR PAWLWHEEL SMALL GEARRETARDATION AIR VANE STRONG HAMMER SPRING AMMER Fig. 3,254.—Elementary electro-mechanical bell or gong. In this bell an electrically con-trolled clockwork actuated…
Electrical engineering
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