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 397
in the shunt-circuit 4, andshould be adjustable, so that the electric en-ergy from the battery d may balance that fromthe line 2, and prevent decomposition in thechemical paper, When the stylus or roller of the transmitterenters a perforation in the strip of paper, thenthe short circuit 3 from the… … N. PETERS. Photo-Lithographer. Wathington. D. C. United States Patent Office. THOMAS A. EDISON, OF NEWARK, NEW JEESEY.IMPROVEMENT IN DUPLEX TELEGRAPHS. Specification forming part of Letters Patent No. 147,917, dated February 24, 1874; application filed June 27,1873. To all whom U may concern: Be it…
Trade catalogs · Patents · Edison, Thomas A. (Thomas Alva), 1847-1931 · Inventions · Telegraph · Electric machinery · Electric apparatus and appliances · Phonograph · Telephone · Motors
Internet Archive Book Images · Smithsonian Libraries · No known copyright restrictions (public domain). Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten20unit-275-109.webp)
