. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . ls at inter-vals with the main circuit and one connecting 105the low-resistance coils at intervals with theconsumption - circuit, the connections of themain and consumption circuits being changedor advanced simultaneously, substantially asset forth. no 4. The combination, with the main and con-sumption circuits, of the double-wound sta-tionary core or cores, the stationary commu-tator-cylinders connected at intervals with thewindings of such core or cores-, and the simul- iMtaneously-revolving commutator brushes ors
. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . ls at inter-vals with the main circuit and one connecting 105the low-resistance coils at intervals with theconsumption - circuit, the connections of themain and consumption circuits being changedor advanced simultaneously, substantially asset forth. no 4. The combination, with the main and con-sumption circuits, of the double-wound sta-tionary core or cores, the stationary commu-tator-cylinders connected at intervals with thewindings of such core or cores-, and the simul- iMtaneously-revolving commutator brushes orsprings connected with the main and consump-tion circuits, substantially as set forth. 5. The combination, with the main aud con-sumption circuits, of the double-wound core Mor cores, the commutator-cylinders, and theex-terior irou ring, substantially as set forth. This specification signed ind witnessed this7th day of July, 1882. THOMAS A. EDISON. Witnesses: Eichd. N. Dyer,Edwabd H. Pyatt. (No Model.) No. 278,419. T. A. EDISON. DYNAMO ELECTRIC MACHINE. Patented May 29, WITNESSES: INVENTOR: OTA BY ATTORNEY PETERS, Photo-Lithographer. Washirttftfrt. f> C. United States Patent Office THOMAS A. EDISON, OF MENLO PARK, NEW JERSEY, ASSIGNOR TO THEEDISON ELECTRIC LIGHT COMPANY. OF NEW YORK, N. Y. DYNAMO-ELECTRIC MACHINE. SPECIFICATION forming part of Letters Patent No. 278,419, dated May 29, 1883. Application filed August ?, 1882. (No 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 aud5 usefnl Improvement in Dynamo-Electric Ma-chines, (Case No. 388;) and I do hereby declarethat the following is a full and exact descrip-tion of the same, reference being had to the ac-companying drawings, and to the letters of ret-ro erence marked thereon. The object I have in view is to produce sim-ple and efficient means for regulating the gen-erative capacity of dynamo or magneto elec
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