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US 5,293,522 AGranted
Ground fault circuit breaker with test spring/contacts directly mounted to test circuit of printed circuit board
AssigneeWestinghouse Electric Corp.
InventorsJoseph P. Fello, Umesh C. Patel, Michael J. Whipple, Garry B. Theadore
Life of this patent
Estimating the term…
Abstract
A ground fault circuit breaker in which both the fixed and movable contacts of the ground fault test switch are directly secured to the printed circuit board on which the ground fault detection circuit is implemented, with the movable contact also providing the spring bias for the test button.
Claims6
A ground fault circuit breaker comprising:
- at least one pair of separable power contacts;
- tripping means for tripping said separable power contacts open in response to selected current conditions;
- ground fault detection means including a printed circuit board, ground fault detection circuit means for detecting a ground fault condition and including a ground fault test circuit mounted on said printed circuit board, and actuating means responsive to detection of said ground fault conditions actuating said tripping means;
- and
- test means comprising:
- a fixed contact member directly mounted on and supported by said circuit board and electrically connected to said ground fault test circuit;
- a resiliently deformable movable contact member having a first end directly mounted on and supported by said printed circuit board and electrically connected to said ground fault test circuit;
- and
- a test button biased to an off position by said resiliently deformable movable contact member and depressible to resiliently deform said resiliently deformable movable contact member to contact said fixed contact member to complete said ground fault test circuit.
6 more elements
Dependencies are inferred from the claim text.