Cyclopedia of applied electricity : a practical guide for electricians, mechanics, engineers, students, telegraph and telephone operators, and all others interested in electricity (1905)
American School (Chicago, Ill.) · Chicago : American School of Correspondence · leaf 72
for the primary and secondary circuits asin the series telephone. The permanently bridged ringer does not interfere with theaction of the receiving circuit, since its coils have a resistance ofabout 1600 ohms, and are wound so that their self-induction islarge. Thus they offer a liigli impedance to… … 60 ELEMENTS OF ELECTKIdTY. 53 There are three general methods of constructing lines, namely,the grounded circuit, the metallic circuit, and the common return.In the common return the circuit is completed through a copperwire instead of through the ground as in the grounded system,thus eliminating…
Electrical engineering
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