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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 281

An illustration from Collection of United States patents granted to Thomas A. Edison, 1869-1884, 1869, leaf 281
nnectedwith the earth and line in a chemical telegraphinstrument and adjusted by the rheostat m toneutralize earth currents, substantially as setforth. 2. The conductors i % connected with thebattery p, in combination with the stylus e ofa chemical receiving instrument, for the pur-poses and… … United States Patent Office, THOMAS A. EDISON, OF NEWARK, NEW JERSEY, ASSIGNOR TO HIMSELFAND GEORGE HARRINGTON, OF WASHINGTON, D. C. IMPROVEMENT IN ELECTRO-MAGNETIC ADJUSTERS. Specification forming part of Letters Patent No. 134,§6§, dated January 14, 1873. To all whom it may concern: Be it known…

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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