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 78
bell. Effect: Can call central but central cannot ring subscriber althoughboth can talk. 6. Open receiver. 7. Open receiver cord. 8. Open secondary coil THE TELEPHONE 2,171 9. Open switch hook contact.10. Receiver diaphragm missing. Effect: Can hear central ring but cannot hear talking with… … r% Signal BallWhen Operated i Position of Armature When Operated Generator Armature. \ W/////ffl Line ¥ ^.
Electrical engineering
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