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US 5,012,495 AGranted
Switch and circuit breaker combination device
AssigneeEagle Electric Mfg. Co., Inc.
InventorsRonald G. Munroe, Christopher J. Sedlmayr
Life of this patent
Estimating the term…
Abstract
An improved device for protecting an electrical load from a current overload combines an electrical switch and a re-settable circuit breaker in a single housing. The device avoids the use of gate plates, visually alerts an operator to the existence of a tripped conditions, and provides automatically self-aligning, evenly-wearing contacts for the switch.
Claims15
A device for protecting an electrical load from electrical current overload, comprising:
- (a) a housing;
- (b) electrical switching means on the housing and including an actuatable switch element movable between open and closed positions to respectively prevent and enable electrical current to flow through the switching means;
- (c) resettable circuit breaker means in the housing for interrupting current flow to the load in response to a current overload, and for preventing resumption of the current flow until the breaker means is reset, said breaker means being electrically connected in series with the switching means and including a latch element and a resettable trip element, said latch element being movable along a path in response to the current overload from a latched position to a tripped position in which the latch and trip elements are respectively latched and unlatched relative to each other;
- (d) actuator means for resetting the trip element from the tripped to the latched position, and for simultaneously moving the switch element from the closed to the open position to prevent current from flowing to the load during resetting, said actuator means being further operative for moving the switch element from the open to the closed position while maintaining the trip element in the latched position to enable current to resume flowing to the load after resetting, said actuator means including an actuator mounted on the housing for manual displacement;
- (e) means for mounting the switch element on the actuator for joint displacement therewith;
- and
- (f) means for mounting the trip element on the actuator for joint displacement therewith during resetting, said trip element being biasingly urged for displacement relative to the actuator away from said path to the tripped position and maintained at a distance from and out of engagement with, the latch element until the breaker means is reset.
4 more elements
An electrical switch, comprising:
- (a) a housing;
- (b) an actuator mounted on the housing for displacement therewith;
- (c) a stationary electrically conductive contact mounted on the housing;
- and
- (d) an actuatable switch element movable by the actuator between open and closed positions to respectively prevent and enable electrical current to flow through the switch, said switch element including a plurality of movable arms extending along respective arcs and terminating in linear edge contact regions that wipingly engage the stationary contact in the closed position, said arms being constituted of an electrically conductive, erodable material that wears due to electrical arcing at the linear edge contact regions when the element is moved to the open position, thereby aligning the linear edge contact regions, said aligned and worn linear edge contact regions being mutually co-linear.
2 more elements
Dependencies are inferred from the claim text.