Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise .. (1916)
Swingle, Calvin F. (Calvin Franklin), b. 1846 · Chicago, F.J. Drake & company · leaf 1334
eed likely that the development of high-ten-sion transmission of power would have been very seriouslyhampered but for the invention of the oil switch. This use of oil has made it possible to rupture easily andsafely, circuits carrying heavy currents at high voltage and,further, to open these… … Fig. 605type d westinghouse oil switch By means of these relays, used in connection with oil circuit-breakers, perfect protection can be secured for the apparatusto which they are applied. The term switch is given to those pieces of apparatusin which the contacts are similar to the ordinary…
