The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 484
Fig. 430.—Universal Shunt Box ELECTRICAL MEASUREMENTS 455 Ayrton & Mather, which has the advantage that it can beused with any galvanometer. Fig. 430 shows a rotaryswitch form, and Fig. 431the plan and connectionsof a peg switch form of theinstrument. G is the gal-vanometer, and r a resist-ance… … part of the resistance of r,and the current passingthrough splits into pro-portional parts, one part Fig. 431.—Connections of Universalgoing only through the Shunt Box fraction of r, and the other part passing through the remain-ing fraction of r and the galvanometer. The resistance of rmay be any…
Telephone
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