Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Automatic circuit-interrupting devices
Reexamination Certificate
2005-01-11
2005-01-11
Donovan, Lincoln (Department: 2832)
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Automatic circuit-interrupting devices
C335S174000, C335S023000
Reexamination Certificate
active
06842096
ABSTRACT:
A magnet assembly for actuating a trip latch in a circuit breaker. The magnet assembly includes a core and an armature. The core is disposed around a conductor forming a primary current path in the circuit breaker, and includes an end forming a pole face. The armature is biased by a force acting in a direction away from the pole face. The armature includes a generally planar surface and a projection extending from the generally planar surface toward the pole face. The generally planar surface is separated from the pole face by a first air gap, and the projection is separated from the pole face by a second air gap. The first air gap is larger than the second air gap.
REFERENCES:
patent: 4479101 (1984-10-01), Checinski
patent: 4503408 (1985-03-01), Mrenna et al.
patent: 4504807 (1985-03-01), Nar
patent: 4616199 (1986-10-01), Oster
patent: 6218919 (2001-04-01), Ciarcia et al.
Brignoni Luis
Ciarcia Ronald
Kim Samuel Stephen
Macha Narender
Subramanian Anantharam
Cantor & Colburn LLP
Donovan Lincoln
General Electric Company
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