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 462
or wooden box of such proportions andsize as to reinforce the sound. This enables a relay to act as asounder, its weak sounds being virtually magnified so as to beaudible. Relay Connection. A connection used in telegraphy, includinga local battery, with a short circuit normally open, but closed by…
Electricity
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