Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Tripping means
Reexamination Certificate
2008-02-18
2010-11-09
Enad, Elvin G (Department: 2832)
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Tripping means
C335S006000, C335S021000, C335S102000, C335S106000, C335S172000, C335S202000, C335S220000, C335S229000, C335S255000, C335S261000, C335S273000, C335S279000, C335S281000
Reexamination Certificate
active
07830231
ABSTRACT:
A circuit breaker includes separable contacts, an operating mechanism structured to open and close the contacts, and a trip unit cooperating with the operating mechanism to trip open the contacts. The trip unit includes a sensor structured to sense current flowing through the contacts, a processor structured to output a trip signal responsive to the sensed current, and a trip actuator. The trip actuator includes a housing including a recess, a coil within the recess, the coil having an opening therethrough, a magnet within the recess, a thermoplastic bushing including a conduit therethrough, the thermoplastic bushing being coupled to the housing, and an armature disposable within the opening of the coil and slidably disposed within the conduit of the thermoplastic bushing. The magnet attracts the armature toward the housing. A spring biases the armature away from the housing, in order to cause the operating mechanism to trip open the contacts.
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Carlino Harry James
Humbert Joseph Bell
Maloney Lloyd Allen
Suryani Martha
Eaton Corporation
Enad Elvin G
Moran Martin J.
Musleh Mohamad A
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