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US 5,844,457 AGranted
Electromagnetically operated electric switching apparatus
AssigneeEaton Corporation
InventorsKurt V. Eckroth, David S. Hunter
Life of this patent
Estimating the term…
Abstract
A pair of pivoted links positioned at opposite sides of a movable armature and reversely oriented with respect to each other, have a pivotal connection at their opposite ends to a movable contact carrier and intermediate their ends to the armature whereby movement of the armature is amplified in movement of the contact carrier to permit reduction in the air gap between the armature and electromagnet core without incurring a corresponding reduction in contact carrier movement.
Claims12
Electromagnetically operated electric switching apparatus comprising:
- an insulating housing;
- an electromagnet mounted in said housing;
- stationary contacts mounted in said housing in spaced apart relation;
- a movable contact carrier guided for reciprocal movement in said housing;
- movable contacts mounted on said contact carrier for movement therewith into and out of bridging engagement with said stationary contacts;
- a magnetic armature movable toward said electromagnet upon energization of said electromagnet;
- and
- an amplification drive mechanism connecting said contact carrier and said armature, said amplification drive mechanism comprising a pair of links respectively disposed on opposite sides of said armature, said links each having pivotal connection at one end thereof to said housing and at opposite ends thereof to said contact carrier, and having pivotal connection to said armature intermediate said one end and said opposite end, said amplification drive mechanism effecting greater movement of said contact carrier than said armature as said armature moves toward said electromagnet.
5 more elements
In an electromagnetic contactor having:
- spaced stationary contacts;
- a movable contact carrier;
- movable contacts carried by said contact carrier and movable therewith into and out of bridging engagement with said stationary contacts;
- an electromagnet comprising a fixed core, a coil, and an armature movable into and out of engagement with said core;
- the improvement comprising an amplification drive system connecting said movable contact carrier to said armature, said drive system being driven by said armature for amplifying movement of said carrier relative to movement of said armature.
2 more elements
Dependencies are inferred from the claim text.