A dictionary of electrical words, terms and phrases (1896)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W.J. Johnston company · leaf 664
ht an electric lamp, and conversely,on the approach of daylight and the consequentincrease of solar illumination, to turn off thelight. Switch, D. B. -A contraction for double-break switch. (See Switch, Double-Break?) Switch, D. P. A contraction for double-pole switch. (See Switch, Double-Pole?)… … Fig. 581. Flush Key Switch. A form of flush switch is shown in Fig. 581in which a removable key, instead of the ordinary,fixed key, is employed for opening and closing theswitch. Swi. 653 [Sys. Switch, Four-Way A term some-times employed in place of four-point switch.(See Switch, Four-Point)…
Electricity · Electrical engineering
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