The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 327
& end, separated by an insulating fibre washer, as shown. The 298 PRACTICAL TELEPHONE HANDBOOK outside windings at each end are connected to the insidewindings to form one coil, and the two intermediate windingsto form another, so that all the four coils may be of an … Fig. 302.—Repeater Rack and Fuse Panel equal resistance and inductance. The outer case is a soft-iron tube with iron end pieces. Two fibre plugs are driven inthe ends so as to compress the thin iron core wires firmlyagainst the iron end pieces. A PPA RA T US-ROOM 299 What are known as the No. 11a…
Telephone
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