Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Contact-actuating means
Patent
1985-07-12
1987-01-06
Goldberg, E. A.
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Contact-actuating means
335147, 335 16, 200147R, H01H 300
Patent
active
046350144
ABSTRACT:
The electromagnetic forces tending to force open the contacts of an electromagnetic contactor are reduced by providing a current flow path having a geometry that tends to minimize the magnetically produced forces acting upon the movable contact of an electromagnetic contactor. A contactor has a frame, a stationary contact attached to the frame, a first conductor supplying the stationary contact, an armature rotatably mounted in the frame, a movable contact attached to the armature, and a second conductor supplying the movable contact. An arm has a first arm end supporting the movable contact and a second arm end attached to the armature. A rod conductor is attached to the frame at a point near to the movable contact when the movable contact is in an open position, a flexible link having a first link end is attached to the arm near the second arm end, and is attached at a second link end to the rod conductor located near the movable contact so that current flow through the arm is substantially anti-parallel to current flow through the flexible link thereby permitting at least a partial cancellation of magnetic forces generated by current flow from the arm, through the flexible link, and through the rod conductor.
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Erb Fred
Orosz Miklos J.
Donovan Lincoln D.
Goldberg E. A.
Johnston A. Sidney
Square D Company
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