Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 42
magnets in the motor,the differential mil-ammeter, the rheostat, and finally to the second terminal of the sourceof current. The energization of the magnets causes the formation of a magnetic fieldthrough the polepieces and yoke of the magnets and the teeth of the armature as shownby the dotted… … Page 4 Section 2 Multiplex System 263-C 5S
Telegraph
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