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 539
such character, by pro-longing the normal duration of one of the saidalternate currents, whether positive or nega-tive. 3. The combination of the safety-stops d dwith the stops i i and armature-lever D, sub-stantially as and for the purpose specified. In testimony that we claim the foregoingwe have… … N.PETERS, PHOTO-LITHOGRAPHER, WASHINGTON, D C. United States Patent Office. THOMAS A. EDISON, OF NEWARK, NEW JERSEY, ASSIGNOR TO HIMSELF ANDGEORGE HARRINGTON, OF WASHINGTON, DISTRICT OF COLUMBIA. IMPROVEMENT IN AUTOMATIC TELEGRAPHS. Specification forming part of Letters Patent No. 195,751, dated…
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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