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Collection of United States patents granted to Thomas A. Edison, 1869-1884 (1869)

Edison, Thomas A. (Thomas Alva), 1847-1931, Peters, N. (Norris), lithographer, Hammer, William Joseph, 1858-1934, former owner. DSI, Edison, Thomas A. (Thomas Alva), 1847-1931, inscriber. DSI, United States. Patent Office · Washington, D.C. : U.S. Patent Office · leaf 1623

An illustration from Collection of United States patents granted to Thomas A. Edison, 1869-1884, 1869, leaf 1623
tion, with a dynamo or mag-neto electric machine, of the galvanometer incircuit therefrom, the pivoted arm carryingcontacts controlled by the galvanometer, theelectro-magnets working such arm, and the re- ,511 3 sistance adjusted by such arm, substantiallyas set forth. This specification signed and… … PETERS. Phoio-UthoRrapW. Washington. D. C. (No Model.) 2 Sheets—Sheet 2. T. A. EDISON. DYNAMO ELECTRIC MACHINE. No. 287,512. Patented Oct. 30, 1883.

Trade catalogs · Patents · Edison, Thomas A. (Thomas Alva), 1847-1931 · Inventions · Telegraph · Electric machinery · Electric apparatus and appliances · Phonograph · Telephone · Motors

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