Electricity: circuit makers and breakers – Contact moved by sudden release of stored energy
Reexamination Certificate
2005-03-08
2005-03-08
Lee, K. (Department: 2832)
Electricity: circuit makers and breakers
Contact moved by sudden release of stored energy,
C200S401000, C335S174000
Reexamination Certificate
active
06864450
ABSTRACT:
An improved circuit breaker includes an inertial time delay mechanism that permits a self-powered trip unit to become fully operational before inputting into the trip unit a signal indicating a change in the state of the circuit breaker. The time delay mechanism includes an inertia member, a first spring, and a second spring, and is activated upon the rotation of a lay shaft of an operating mechanism of the circuit breaker. The first spring extends between the inertia member and a housing of the circuit breaker and biases the inertia member from an initial position toward a terminal position. The second spring extends between the lay shaft and the inertia member and biases the inertia member toward the initial position when the circuit breaker is in an OFF condition. The combined action of the first and second springs on the inertia member provides a time delay using a relatively small inertial mass.
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Bottegal Paul Thomas
Chen Steven Zhenghong
Krevokuch Robert Nicklas
Palmieri Daniel Evan
Ricciuti Anthony Thomas
Eaton Corporation
Lee K.
Moran Martin J.
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