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 171
et havingsufficient merit in some cases to warrant their adoption. INDUCTION COILS 151 In the plain vibrator, the circuit is broken at the instant thespring begins to move, hence, the operation must be compara-tively slow. In order to render the break more abrupt some vibrators havetwo moving… … .Fig. 146.—A hammer vibrator. When at rest, the upward tension of the spring, whichcarries the armature A, holds the platinum points in contact and causes the upper springC, to leave shoulder of adjusting screw D, and rest against the heavy brass plate aboveit. When the iron core B, attracts the…
Electrical engineering
Internet Archive · Brigham Young University · Public Domain Mark 1.0. Free to use for anything.
