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 1675
th. 4. In a dynamo or magneto electric ma- 95chine, the combination, with the armature, ofthe convergent polar extensions, the fiat soft-iron magnet-cores provided with separatewindings and two polar extensions, to whichsaid cores are attached, substantially as set 100forth. This specification… … N. PETERS. Photo-Lithographer, Vasriington. D. C. United States Patent Office THOMAS A. EDISON, OF MENLO PARK, NEW JERSEY, ASSIGNOR TO THEEDISON ELECTRIC LIGHT COMPANY, OP NEW YORK, N. Y. REGULATOR FOR DYNAMO-ELECTRIC MACHINES. SPECIFICATION- forming part of Letters Patent No. 287,524, dated…
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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