A dictionary of electrical words, terms and phrases (1898)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W. J. Johnston company · leaf 64
same. In order to protect the remaining devices fromvariations in the current on the extinguishment ofany of the devices, automatic cut-outs are pro-vided, which divert the current thus cut offthrough a resistance equivalent to that of thedevice. A variety of distribution boxes are in use.… … Fig. 58. District Call Box. A system of district calls includes a number ofcall boxes connected by telegraphic lines with acentral station. A wheel, or its equivalent, set in motion by the pulling of a lever, makes andbreaks an electric circuit and sends over the linea succession of electric…
Electricity · Electrical engineering
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