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 79
itch hook is hereshown. The arrows indicate how the alternating current produced by the turning of thehand generator at the subscribers station passes out over the line and through the signalcoil, thus energizing it and causing the signal to display its red surface. 15. Dented receiver diaphragm.… … ^^ p<~ CO <U n h rt .5 V*g*—+3 » oj 3 •S i5 p 2 cs-s•s « °^,£ > .|sl sjrs oS rt cu^fl co o O C 3 * V . CO (U H< co bo to 3 C o <u »a^ * O CO T3 ^.« o *»J5 O^-M CO CUT.S; »H TO t? C tO ** o) c- 5 ^>. h be . toU ^ o to ».£ c JS <u flu: o S eto ° * 8 __,C co to > • —g,G to o…
Electrical engineering
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