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 111
rough the magnet, substantially as specified. 2. Tbe double electro-magnet, armatures, and stops,arranged substantially as specified, so that a currentof one polarity shall allow one armature to vibrate andblock the other, and the reverse, as set forth. Signed by me this 22d day of June, A. D.… … AM. PHOTO-LITHOGRAPHIC CO N. Y (OSBORNCS PHOCSSS.J
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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