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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 647

An illustration from Collection of United States patents granted to Thomas A. Edison, 1869-1884, 1869, leaf 647
d instead. A large cone may be inserted in the mouth-piece B, for collecting extraneous sounds andcausing them to move the diaphragm. This apparatus is useful for giving motionto clocks and other small apparatus requiringminute power. I claim as my invention— A vocal engine consisting of a… … N. PETERS, PHOTO-LITHOGRAPHER, WASHINGTON. D C. I 2 Sheets—Sheet 2. T. A. EDISON.Automatic-Telegraph. No. 213,554. Patented Mar. 25, 1879. tier.

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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