Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 207
733. ELECTRIC THERMOSTAT. 734. Two strips of thin sheet steel andbrass are fastened together by soldering orriveting, and to a base with binding-postin an insulated frame. A cap, with bindingpost and adjusting screw and index plate,allows for electric contact of the springand screw at any required… … 735. TELEPHONE TRANS-MITTER. —A, A, thin irondiaphragm ; B, India rubber in con-tact with diaphragm and the ivorydisc, C ; D, platinum foil betweentheivorydisc,C,and the carbon disc,E; G, disc and screw for adjust-ment of carbon contact; H, ad-justing screw for diaphragm con-tact.
Mechanical movements
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