The standard electrical dictionary; a popular dictionary of words, terms, and phrases, used in the practice of electrical engineering (1897)
Sloane, T. O'Conor (Thomas O'Conor), 1851-1940 · New York, H. W. Henley & co. · leaf 319
sitionthe galvanometer G is in circuit with the opposite coatings of thecondenser C. On depressing the contact S2 is broken and S1 ismade. This brings the battery B in circuit with the condensercoatings. On releasing the key it springs up and the galvanometerreceives the effect of the charge of the… … Fig. 207. Kempes Discharge Key. Key, Double Tapper. A telegraph key giving contacts alter-nately for currents in opposite directions, used in needle telegraphy. Key, Increment. A key for use in duplex and quadruplextelegraphy. Its action is to increase the line current, not merely tosuddenly turn…
Electricity
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