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 199
s powerful the poles 1c should be closerto the armature, and if feeble the poles shouldbe further removed. I claim as my invention— The balancing-X-)oles 1c, energized by inducedmagnetism from the cores i of the electro-mag-net, and acting in opposite direction to suchelectro magnet, substantially… … ♦ 2 Sheets — Sheet 2. T. A. EDISON.Improvement in Rheotomes or Circuit-Directors. No. 131,334. Patented Sep. 17, 1872.
Trade catalogs · Patents · Edison, Thomas A. (Thomas Alva), 1847-1931 · Inventions · Telegraph · Electric machinery · Electric apparatus and appliances · Phonograph · Telephone · Motors
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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