. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . , PHOTO-LITHOGRAPHER, United States Patent Officec THOMAS A. EDISON, OF MENLO PARK, NEW THE GENERATION OF ELECTRIC CURRENTS. SPECIFICATION forming part of Letters Patent No. 239,374, dated March 29, 1881. Application filed January 11,1881. (No model.) To all whom it may concern : Be it known that I, Thomas A. Edison, ofMeulo Park, in the county of Middlesex andState of New Jersey, have invented a new anduseful Method and Means for Regulating- theGeneration of Electric Currents; and I dohere
. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . , PHOTO-LITHOGRAPHER, United States Patent Officec THOMAS A. EDISON, OF MENLO PARK, NEW THE GENERATION OF ELECTRIC CURRENTS. SPECIFICATION forming part of Letters Patent No. 239,374, dated March 29, 1881. Application filed January 11,1881. (No model.) To all whom it may concern : Be it known that I, Thomas A. Edison, ofMeulo Park, in the county of Middlesex andState of New Jersey, have invented a new anduseful Method and Means for Regulating- theGeneration of Electric Currents; and I dohereby declare that the following is a full andexact description of the same, reference beinghad to the accompanying drawings, and too the letters of reference marked thereon. When a number of generators are used tofurnish the current for a system of generationand translation—such, for instance, as shownand explained by me in a prior application fora patent by me made—it is necessary to pro-vide some means for controlling the genera-tion, so that it may be in accord with th
Size: 893px × 2797px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcentury1800, booksubjectinventions, booksubjecttelephone
