The standard electrical dictionary : a popular encyclopaedia of words and terms used in the practice of electrical engineering (1898)
Sloane, T. O'Conor (Thomas O'Conor), 1851-1940 · London : Crosby Lockwood and Son · leaf 521
n as th,e A side,that on the right as the B side of the apparatus. Al, the reversing key, reverses the direction of the current. K^is a simple key, known as the increment key; it is used simply toincrease the strength of the current. The way in which the keys K^ and K^ combine their action isshown… … I <^? • ?^ 9 m ..^ 0- 6 op 6 ^ { -hi^ t.|ly Fig. 320. QuADRUPLEX Telegraph Connections. whole combined battery will be 3.3 E-^. The negative pole of E^is connected to z and z^ of K-^, and the positive pole of E^ to a ofK^ through a resistance coil s. A wire, called the tap wire, con-nects the…
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