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 1131
ar-mature provided with a core of magnetic metaland inductive portions, of an exciting-magnet Ihaving polar extensions chambered to receiveopposite portions of the armature, and reduced 35!in width on their approaching faces, substan-tially as set forth. This specification signed and witnessed… … WITNESSES: INVENTOR: on BY C\ ATTORNEYS. United States Patent Office. THOMAS A. EDISON, OF MENLO PARK, NEW JEESEY, ASSIGNOR TO THEEDISON ELECTRIC LIGHT COMPANY, OE NEW YORK, N. Y. COMMUTATOR FOR DYNAMO OR MAGNETO ELECTRIC MACHINES. SPECIFICATION forming part of Letters Patent No. 263,149, 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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