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 622
Fig. 377. Regulating Sockets. or a choking coil, the action of which may be controlled bya key or knob, so that the brilliancy of the lamp is varied. Relay, Double Balanced. A combination of two relays on onebase, with their armatures so adjusted that either a very slight … Fig. 378. Double Balanced Relay. increase or decrease in the line current will close the local circuit.It is used in burglar alarm systems. Relay, Marconis. An instrument for receiving messages sentbv a system of high-frequency electric waves. It consists of asmall glass tube 4 cm. long, into which…
Electricity
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer01inte-26-5.webp)