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 522
itsstrength, while that of K2 is to strengthen it, whatever its direction.The resistance coil s, of ioo° resistance, is called a spark coil,because it prevents the high electro-motive force of the wholebattery from damaging the points of contact by sparking or formingan arc across when signals are… … Fig. 321. Quadruplex Telegraph. AY and Bl (Fig. 320) are the relays which are used to respond tothe changes in the currents sent by the keys KY and K2 at thedistant station. AY is a simple polarized relay wound differentially, each wirehaving a resistance of 200 oj, and so connected up as to…
Electricity
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