Electrical and scientific instruments and apparatus : november 20th, 1899 (1899)
Elmer G. Willyoung & Co · New York : E.G. Willyoung · leaf 65
m- ^ … 111Fig. 59. W4356. Fig. 60. W435T. W4356. Single Contact Key on hard rubber base ^^^.^^ g ^5 ^J W4357. Double ,! B ^8 00 W4358. Short Circuit B 5 75 W4359. and Single Contact Key with im-proved eccentric hold down ,. r, o nn The hard rubber eccentric is held by a friction spring washer. Varyingthe…
Electric apparatus and appliances · Equipment and supplies
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