Inside Out Library

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 89

An illustration from Collection of United States patents granted to Thomas A. Edison, 1869-1884, 1869, leaf 89
ntiallyas specified. 2. An electro-magnet of less than an inch inlength, with a permanent magnet and swing-ing tongue to make and break the circuit inan automatic telegraph, substantially as andfor the purposes set forth. 3. The electro-magnet, permanent magnet,and a tongue that swings toward and… … (ilititcft Statis, patent #fi%t THOMAS A. EDISON, OF NEWARK, NEW JERSEY, ASSIGNOR TO HIMSELFAND MARSHALL LEFFERTS, OF NEW YORK CITY. Letters Patent No. 114,658, dated May 9,1871. IMPROVEMENT IN ELECTRO-MAGNETS FOR TELEGRAPH INSTRUMENTS. The Schedule referred to in these Letters Patent and making…

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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