. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . ATTEST: Va 1NVEN T OR: N. PETERS. Photo-Uthographsr. WaWirngtdn, D. C. ■ (No Model.) 2 Sheets—Sheet 2. T. A. EDISON. ELEOTEIO REGULATOE. No. 287,511. Patented Oct. 30, N. PETERS. Photo-Lithographer. Wswhirtgtoo. D. C. United States Patent Office. THOMAS A. EDISON, OF MENLO PARK, NEW REGULATOR. SPECIFICATION forming part of Letters Patent No. 287,511, dated October 30, 1883. Application filed Jnne 29,1883. (Xo model.) To all whom, it may concern. Be it known that I, Thomas A. Edison, ofMenlo Pa
. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . ATTEST: Va 1NVEN T OR: N. PETERS. Photo-Uthographsr. WaWirngtdn, D. C. ■ (No Model.) 2 Sheets—Sheet 2. T. A. EDISON. ELEOTEIO REGULATOE. No. 287,511. Patented Oct. 30, N. PETERS. Photo-Lithographer. Wswhirtgtoo. D. C. United States Patent Office. THOMAS A. EDISON, OF MENLO PARK, NEW REGULATOR. SPECIFICATION forming part of Letters Patent No. 287,511, dated October 30, 1883. Application filed Jnne 29,1883. (Xo model.) To all whom, it may concern. Be it known that I, Thomas A. Edison, ofMenlo Park, in the county of Middlesex andState of New Jersey, have invented a new and5 useful Improvement in Electrical Regulators,(Case No. 583,) of which the following is aspecification. The object I have in view is to obtain sim-ple and efficient means for producing move-o ment by variations in the electro-motive forceof the current of an electrical circuit, whichmeans will be exceedingly sensitive in their• action, responding with great exactness tothe variations in the electro-motive force of 15 the current; and my object herein is more es-pecially to provide simple, efficient, and sen-sitive means for regulating, automatically, theelectro-motiv
Size: 1308px × 1911px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcentury1800, booksubjectinventions, booksubjecttelephone
