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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 717

An illustration from Collection of United States patents granted to Thomas A. Edison, 1869-1884, 1869, leaf 717
of contact, substantially asset forth. 9° 2. The case H, having an inclined bottomand adapted to receive several carbon rods, iucombination with the metallic rod B andmeans for guiding the carbon and maintain-ing the pressure thereof at the point of con- 95tact, substantially as set forth. Signed… … N. PETERS, PHOTO-LITHOGRAPHER. WASHINGTON, O G. United States Patent Office THOMAS A. EDISON, OP MENLO PAEK, NEW JEESEY.METHOD OF PREPARING AUTOGRAPHIC STENCILS FOR PRINTING. SPECIFICATION forming part of Letters Patent No. 224,665, dated February 17, 1880. Application filed March 17, 1879. To all…

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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