. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . (No Model.) T. A. EDISON. DYNAMO ELECTRIC MACHINE. No. 297,587. Patented Apr. 29, N. PETERS. Photo-Lithographer, Washington, D. C. United States Patent Office. THOMAS A. EDISON, OF MENLO PABK, NEW MACHINE. SPECIFICATION forming part of Letters Patent No. 297,587, dated April 29, 1884. Application filed December 12, 188:3. (Xo model.) To all xvliom it may concern: Be it known that I, Thomas A. Edisok, ofMenlo Park, in the county of Middlesex andState of New Jersey, have invented a new an
. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . (No Model.) T. A. EDISON. DYNAMO ELECTRIC MACHINE. No. 297,587. Patented Apr. 29, N. PETERS. Photo-Lithographer, Washington, D. C. United States Patent Office. THOMAS A. EDISON, OF MENLO PABK, NEW MACHINE. SPECIFICATION forming part of Letters Patent No. 297,587, dated April 29, 1884. Application filed December 12, 188:3. (Xo model.) To all xvliom it may concern: Be it known that I, Thomas A. Edisok, ofMenlo Park, in the county of Middlesex andState of New Jersey, have invented a new and5 useful Improvement in Dynamo-Electric Ma-chines, (Case No. 597,) of which the followingis a specification. In. my application No. 587 (SerialNo,108,556) I have set forth means for balancing io the armature-shaft of a dynamo-electric ma-chine in its bearings, so that it is free to movelongitudinally in either direction, whereby theefficient lubrication of the bearings and theeven wearing of the journals and the commu- 15 tator-cylinder are secured. This invention relates to other means for ac-complishing the same object. In the presentcase, as in that above r
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