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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 1577

An illustration from Collection of United States patents granted to Thomas A. Edison, 1869-1884, 1869, leaf 1577
r more independent steam-engines oper-Wating such dynamo or magneto electric ma- 1chines, means for varying the electro-motive ^1force of all the machines simultaneously hide* ■pendent of the speed, and translating devices^connected in multiple arc with said circuit,substantially as set forth. This… … WITNESSES: INVENTOR: BY ■ , Attorneys. N. PETEBS. Ptolo-lilhog^pter. Wa«tongt,>n. D. C. - United States Patent Officeg THOMAS A. EDISON, OF MENLO PAEK, NEW JEESEY, ASSIGNOE TO THEEDISON ELECTEIC LIGHT COMPANY, OP NEW YORK, N. Y. WEBERM ETER. SPECIFICATION forming- part of Letters Patent No.…

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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