DOUGLAS A DUNBAR
Engineers in Erie, PA
License number
Pennsylvania PE032597E
Category
Engineers
Type
Professional Engineer
Address
Address
Erie, PA 16508
Personal information
See more information about DOUGLAS A DUNBAR at radaris.comName
Address
Phone
547 Northbrook Rd, West Chester, PA 19382
7600 Stenton Ave APT J6, Philadelphia, PA 19118
1330 Weaver St, Philadelphia, PA 19150
1842 Mary Ln, Carlisle, PA 17013
2007 Quill Ln, Oreland, PA 19075
Professional information
See more information about DOUGLAS A DUNBAR at trustoria.com
Method And System For Measuring Irregularities In The Surface Of A Commutator
Method And System For Measuring Irregularities In The Surface Of A Commutator
US Patent:
5301545, Apr 12, 1994
Filed:
Oct 5, 1992
Appl. No.:
7/956525
Inventors:
James A. Meyer - Erie PA
James R. Christensen - North East PA
Douglas A. Dunbar - Erie PA
James R. Christensen - North East PA
Douglas A. Dunbar - Erie PA
Assignee:
General Electric Company - Erie PA
International Classification:
G01B 734
US Classification:
73105
Abstract:
Irregularities in the outer surface of a commutator are identified and measured while the commutator is in the motor by removing a brush from its brush holder, and securing a jig in the brush holder. The jig has a sensor which generates electrical signals in response to movement of a profiling foot at an end of the sensor. The sensor is adjusted so that the profiling foot touches the commutator surface, and the commutator is then rotated at least one full revolution. By measuring movement of the profiling foot as the commutator turns, as observed through the output signals of the sensor, irregularities in the commutator surface can be identified and measured. The output signals of the sensor can be recorded or otherwise stored for analysis. The profiling foot is pivoted so that it rests flat against the commutator contacts, even if the brush holder is not properly aligned with the commutator.