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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 1751

An illustration from Collection of United States patents granted to Thomas A. Edison, 1869-1884, 1869, leaf 1751
y asset forth. 6. The combination, with a dynamo-elec-tric machine, of a driving-pulley partly of5 magnetic and partly of non-magnetic mate-rial, and a spring opposing the attraction ofsaid pulley by the field-magnet of the ma-chine, substantially as set forth. This specification signed and… … N. PETERS, Photo-Lithegnpher, Washington, D. United States Patent Office. THOMAS A. EDISON, OF MENLO PAEK, NEW JERSEY, ASSIGNOR TO THEEDISON ELECTRIC LIGHT COMPANY, OP NEW YORK, N. Y. METHOD OF TREATING CARBONS FOR ELECTRIC LIGHTS. SPECIFICATION forming part of Letters Patent No. 298,679, dated May…

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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