. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . ation, with a dynamo-electricmachine, of translating devices located in mul-tiple-arc circuits therefrom, the field-magnet 125coils of the machine, also in a multiple-arc cir-cuit from the circuit supplied by the machine, an adjustable resistance in said field-circuit,electrically-operated devices adjusting suchresistance, and a galvanometer located in a 13c 2§T multiple-are circuit and controlling the cir-cuits to such electrically-operated devices,substantially as set forth. 8. The combination, with a dynamo or ma
. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . ation, with a dynamo-electricmachine, of translating devices located in mul-tiple-arc circuits therefrom, the field-magnet 125coils of the machine, also in a multiple-arc cir-cuit from the circuit supplied by the machine, an adjustable resistance in said field-circuit,electrically-operated devices adjusting suchresistance, and a galvanometer located in a 13c 2§T multiple-are circuit and controlling the cir-cuits to such electrically-operated devices,substantially as set forth. 8. The combination, with a dynamo or mag-neto electric machine, of the galvanometer incircuit therefrom, the pivoted arm carryingcontacts controlled by the galvanometer, theelectro-magnets working such arm, and the re- ,511 3 sistance adjusted by such arm, substantiallyas set forth. This specification signed and witnessed this25th day of June, 1883. THOS. A. EDISON. Witnesses: H. W. Seely,Edward H. Pyatt. (No Model.) 2 Sheets—Sheet 1. T. A. EDISON. DYNAMO ELECTRIC MACHINE. No. 287,512. Patented Oct. 30, PETERS. Phoio-UthoRrapW. Washington. D. C. (No Model.) 2 Sheets—Sheet 2. T. A. EDISON. DYNAMO ELECTRIC MACHINE. No. 287,512. Patented Oct. 30, 1883.
Size: 1292px × 1934px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcentury1800, booksubjectinventions, booksubjecttelephone
