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 527

An illustration from Collection of United States patents granted to Thomas A. Edison, 1869-1884, 1869, leaf 527
ng magnet or sounder 8, substan-tially as set forth. 7. The magnets 12 and 13, at opposite sidesof the vibrating reed, and iu the main-line cir-cuit, with tubes around the cores of one of themagnets, for the purposes set forth. 8. The magnet 15, with its cores in branchesof the mafti line, in… … N. PETERS, PNOTO-LITHOGftAPHER, WASHINGTON, D. C. 2 Sheets —Sheet 2. T. A. EDISON. TELEGRAPHIC ALARM AND SIGNAL APPARATUS.No. 186 548. Patented Jan. 23, 1877.

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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