Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Tripping means
Patent
1998-05-07
1999-03-23
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Tripping means
335167, 335253, H01H 900
Patent
active
058866051
ABSTRACT:
An actuator assembly for an electrical power switch apparatus, the actuator assembly having a housing and a plunger positioned within the housing where the plunger is movable between a set position and an actuated position. The plunger includes a compression spring to provide a pre-load thereto that biases the plunger away from the set position and toward the actuated position. A magnet contained in the housing and positioned proximate to the plunger establishes a magnetic force which overcomes the pre-load of the compression spring and maintains the plunger in a set position. A coil assembly, that when energized, produces an electromagnetic force which bucks the magnetic force established by the magnet allowing the plunger to be propelled by the compression spring to the actuated position. A screw extends through an opening in the plunger for engagement with the compression spring so that rotation of the screw results in the adjustment or calibration of the pre-load of the compression spring.
REFERENCES:
patent: 5162765 (1992-11-01), DiVincenzo et al.
patent: 5453724 (1995-09-01), Seymour et al.
patent: 5503366 (1996-04-01), Zabeck et al.
Ulerich Phillip L.
Wafer John A.
Donovan Lincoln
Eaton Corporation
Moran Martin J.
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