Dynamo electric machinery; its design, construction, and operation; direct-current machines (1915)
Sheldon, Samuel, 1862-1920, Hausmann, Erich, 1886- joint author · New York, D. Van Nostrand Company; · leaf 172
MACHINERY. permanent horseshoe magnets. Fig. 92 shows a telephonemagneto-generator manufactured by the Western ElectricCompany. To the armature shaft is affixed a pinion whichmeshes with a gear wheel turned by hand. Such machinesare designed to ring a call-bell or telephone ringer throughan… … Fig. 92. with shunts, which afford a by-path of low resistancearound the armature when not in use, or devices whichnormally hold the armature circuits open and close themwhen the generators are operated. The air gaps of suchmachines may be as low as 0.01 inch without introducingoperative…
Electric machinery
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
