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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 1355

An illustration from Collection of United States patents granted to Thomas A. Edison, 1869-1884, 1869, leaf 1355
r supporting boththe carbon and presser upon the diaphragm,substantially as set forth. 5. In a speaking-telephone, the combination, 5with the diaphragm, of carbon or similar ma-terial, a spring pressing upon the carbon, andmeans for adjusting the pressure and supportstherefor upon the diaphragm,… … United States Patent Office* THOMAS A. EDISON, OF MENLO PARK, NEW JERSEY.TELEPHONE. SPECIFICATION forming part of Letters Patent No. 266,022, dated October 17, 1882. Application filed August 0, 1879. To all whom it may concern: Be it known that I, Thomas A. Edison, ofMenlo Park, in the State of New…

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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