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 425
Plugs for ResistanceCoil Box. … Plug Switch. A switch composed of twocontact blocks, not touching each other andbrought into electrical connection by the inser-tion of a metallic plug. The latter is usuallyprovided with an insulating handle, and a seatis reamed out for it in the two faces of the contact blocks. Fig. 266.…
Electricity
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