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 143

An illustration from Collection of United States patents granted to Thomas A. Edison, 1869-1884, 1869, leaf 143
out of action by releasing thepressure of said roller i, as set forth. 3. A series of automatic telegraph instru-ments in one main telegraph-line, with lock-ing mechanism and indicators, operated byelectro-magnets, and arranged, substantiallyas set forth, so as to throw into action the de-sired… … JH. PHOTO-LITtlOeKAPMIC CO. MY. I OSBORHt, rXOCESS. f 134,800 United States Patent Office. THOMAS A. EDISON, OF NEWARK, NEW JEESET, ASSIGNOR TO HIMSELFAND GEORGE HARRINGTON, OF WASHINGTON, D. C. IMPROVEMENT IN TELEGRAPHIC RECORDING INSTRUMENTS. Specification forming part of Letters Patent No.…

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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