Identifier: CollectionUnitev1Edis (find matches)
Title: Collection of United States patents granted to Thomas A. Edison, 1869-1884
Year: 1869 (1860s)
Authors: 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
Subjects: Catalogs Patents Edison, Thomas A. (Thomas Alva), 1847-1931 Inventions Telegraph Electric machinery Electric apparatus and appliances Phonograph Telephone Motors Catalogs Patents Catalogs Patents Catalogs
Publisher: Washington, D.C. : U.S. Patent Office
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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nner as is shown inmy application No. 156, filed October 14,1878. The incandescent conductor made in thismanner may be of any desired shape. I claim as my invention— 1. For electric lighting, a conductor of elec-tricity formed of finely-divided metal incor-porated with a non-conductor of electricity,substantially as set forth. 2. A rigid electric-light-giving body havinga longitudinal incision or separation from thebase to near the end, for insuring the circula-tion of the electric current through the entirebody, substantially as set forth. 3. In combination with a rigid light-givingbody having a longitudinal incision, an ex-pansive thermal-circuit regulator to control thestrength of the current by the heat developed,substantially as set forth. Signed by me this 3d day of December, A.D. 1878. THOMAS A. EDISON. Witnesses: Stockton L. Griffin,Geo. E. Carman. T. A. EDISON, Assignor of one-half interest to G. B. Prescott. Quadruplex-Telegraph Repeater.No. 8,906, Reissued Sept. 23, 1879.
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N_ PETERS. Photo-Lithographer. Wastwngtort, 0 C. United States Patent Office THOMAS A* EDISON, OF MEMO PARK, NEW JERSEY, ASSIGNOR OF ONE-HALF INTEREST TO GEORGE B. PRESOOTT. IMPROVEMENT IN QUADRUPLEX-TELEGRAPH REPEATERS. Specification forming part of Letters Patent No. 209,241, dated October 22, 1878; Keissue No. §,906. datedSeptember 23, 1879 ; application filed November 16, 1&78. To all ivliom lb may concern: Be it known that I, Thomas A. Edison,now of Menlo Park, in the county of Middle-sex and State of New Jersey, have inventedcertain new and useful Improvements in Quad -ruplex Telegraphs, which impro\ ements arefully set forth in the following specification,reference being had to the accompanying draw-ings. My present invention consists in certain im-provements upon the apparatus described inmy application for Letters Patent filed on orabout the 1st day of September, A. D. 1874,for improvement in duplex telegraphs, anddesignated as Case 99; and has for its object,first, to p

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