. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . (No Model.) No. 297,583. T. A. EDISON. DYNAMO ELECTRIC MACHINE. Patented Apr. 29, United States Patent Office, THOMAS A. EDISON, OF MENLO PABK, NEW MACHINE. SPECIFICATION forming part of Letters Patent No. 297,583, dated April 29, 1884. Application filed October 10, 1883. (No rucdel) To all whom it may concern: Be it known that I, Thomas A. Edison, ofMenlo Park, in the comity of Middlesex andState of New Jersey, have invented a new and5 useful Improvement in Dynamo-Electric Ma-chines, (
. Collection of United States patents granted to Thomas A. Edison, 1869-1884 . (No Model.) No. 297,583. T. A. EDISON. DYNAMO ELECTRIC MACHINE. Patented Apr. 29, United States Patent Office, THOMAS A. EDISON, OF MENLO PABK, NEW MACHINE. SPECIFICATION forming part of Letters Patent No. 297,583, dated April 29, 1884. Application filed October 10, 1883. (No rucdel) To all whom it may concern: Be it known that I, Thomas A. Edison, ofMenlo Park, in the comity of Middlesex andState of New Jersey, have invented a new and5 useful Improvement in Dynamo-Electric Ma-chines, (Case No. 587,) of which the followingis a specification. This invention relates to the bearings inwhich the armature-shaft of a dynamo-electric io machine is supported, my objects being toproduce an even wear upon the journals, pre-venting grooves from being worn therein; toproduce also an even wear upon the commu-tator-cylinder of the machine; to produce an 15 effectual lubrication by distributing the oilover the whole length of the journals, and toretain the surplus oil which runs down fromthe bearings, instead of allowing it to drip overthe sides of the pill
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