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 479

An illustration from Collection of United States patents granted to Thomas A. Edison, 1869-1884, 1869, leaf 479
ofthe cylinder, and as the latter revolves thepulsations of electricity are made to indicatethe letter of the key. We claim as our invention— 1. The combination, with thesegmeutal cir-cuit-closing weight, of the switch /, for thepurposes set forth. 2. The combination, with the… … N, PETERS, PHOTO-LITHOGRAPHER, WASHINGTON. D C. United States Patent Office. THOMAS A. EDISON, OF NEWARK, NEW JERSEY, ASSIGNOR TO HIMSELFAND GEORGE HARRINGTON, OF WASHINGTON, D. 0. IMPROVEMENT IN TELEGRAPH APPARATUS. Specification forming part of Letters Patent No. 171,273, dated December 21, 1875…

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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