United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 420
mo-tor circuit. 8. A phonograph arm supporting a dia-phragm, the slide-rest contact of which is inthe motor electrical circuit of the phonograph, locin combination with a slide-rest providedwith a conducting bar or part also in the elec-trical motor circuit, and with a non-conduct-ing part or… … LITHOGRAPMINQ COMPANY.W ASH I NATO N. O. O. (No Model.) 4 Sheets—Sheet 2. A. K. KELLER. ATTACHMENT FOR OPERATING PHONOGRAPHS. No. 518,190. Patented Apr. 10, 1894.
Phonograph · Patents
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