US 12,003,067 B2
System and method for monitoring the status of one or more components of an electrical machine
Robert S. Cutsforth, Bellingham, WA (US); Dustin L. Cutsforth, Leawood, KS (US); Douglas Christopher Bruey, Seattle, WA (US); Michael Lee Schaaf, Seattle, WA (US); and David William Drury Harrison, Seattle, WA (US)
Assigned to CUTSFORTH, INC., Minneapolis, MN (US)
Filed by CUTSFORTH, INC., Minneapolis, MN (US)
Filed on Nov. 18, 2021, as Appl. No. 17/529,521.
Application 17/529,521 is a continuation of application No. 16/592,269, filed on Oct. 3, 2019, granted, now 11,211,757.
Claims priority of provisional application 62/741,152, filed on Oct. 4, 2018.
Prior Publication US 2022/0077641 A1, Mar. 10, 2022
Int. Cl. H01R 39/58 (2006.01); G01B 21/22 (2006.01); H01R 39/26 (2006.01); H01R 39/38 (2006.01); H02K 11/20 (2016.01)
CPC H01R 39/58 (2013.01) [G01B 21/22 (2013.01); H01R 39/26 (2013.01); H01R 39/38 (2013.01); H02K 11/20 (2016.01)] 20 Claims
OG exemplary drawing
 
1. A system for monitoring the wear state of a carbon brush of a brush holder assembly in an electrical device, comprising:
a wear state monitor positionable within a coiled portion of a spring of the brush holder assembly, the wear state monitor including:
a cylindrical housing;
a sensor disposed within the housing of the wear state monitor; and
a power source disposed within the housing of the wear state monitor;
wherein the sensor is configured to measure an angular displacement of the wear state monitor as the wear state monitor rotates;
wherein the measured angular displacement of the wear state monitor correlates to a diminution in length of the carbon brush during use.