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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 1713

An illustration from Collection of United States patents granted to Thomas A. Edison, 1869-1884, 1869, leaf 1713
oller composed of a pivoted bar, mercury- 1cups in which the circuit is made and broken, a mercury-cup for constantly maintaining elec-trical connection with the moving bar, anda tube partly filled with liquid, for throwing i^mthe bar to the limits of its movements, sub-stantially as set forth.… … N. PETERS. Photo-Uttograptier. Washington. D. C. United States Patent Office. THOMAS A. EDISON, OF MENLO PARK, NEW JERSEY.TYPE-WRITER. SPECIFICATION forming part of Letters Patent No. 295,990, dated April 1, 1884. Application filed December 9, 1878. Benewed May 25, 1883. (Model.) Patented in…

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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