Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1982-08-18
1984-12-11
Skudy, R.
Electrical generator or motor structure
Dynamoelectric
Rotary
310245, H02K 1300
Patent
active
044880782
ABSTRACT:
A brush wear detector comprised of an L-shaped leaf spring having the outer end of its longer leg mounted on a first insulating member in fixed relationship to a spring support for a self-winding, brush-biasing spring. A second dielectric member is secured to the leaf spring between the ends thereof and projects outward from the leaf spring into engagement with an uncoiled section of a brush-biasing spring. The free end of the leaf spring is held away from engagement with the brush-biasing spring support, thereby being electrically isolated from it, when a new brush is mounted in operating position under the brush-biasing spring. When the brush becomes worn a pre-determined amount the brush-biasing spring moves in a direction away from the second dielectric member and so enables the leaf spring to force its free end into electrically conducting engagement with the electrically energized spring support. Establishment of that conductive relationship produces a signal that actuates a brush wear indicating circuit that is operatively connected to the leaf spring.
REFERENCES:
patent: 2691114 (1954-10-01), Lykins
patent: 3523288 (1970-08-01), Thompson
patent: 4024525 (1977-05-01), Baumgartner
patent: 4166227 (1979-08-01), Guglielmo
patent: 4172988 (1979-10-01), Lowther
patent: 4272695 (1981-06-01), Buchwald
patent: 4329683 (1980-09-01), Kimberlin
patent: 4344009 (1982-08-01), Reynolds
patent: 4348608 (1982-09-01), Michael
Freedman Irving M.
General Electric Company
Myles Vale P.
Skudy R.
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