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 1025
l magnet com-posed of a helix and an electro-mag net as acore thereto, both included in one circuit de-rived from the main or supply circuit, and a5 movable contact-arm controlled by the mag-net and contacting with the resistance, sub-stantially as set forth. This specification signed and witnessed… … United States Patent Office. THOMAS A. EDISON, OF MENLO PARK, NEW JERSEY, ASSIGNOR TO THEEDISON ELECTRIC LIGHT COMPANY, OF NEW YORK, N. Y. REGULATOR FOR MAGNETO OR DYNAMO ELECTRIC MACHINES. SPECIFICATION forming part of Letters Patent No. 251,556, dated Decernber 27, 1881. Application filed October…
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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