Rotary contact assembly for high ampere-rated circuit breakers
First Claim
Patent Images
1. A circuit breaker moveable contact assembly comprising:
- a circular rotor having a rotor aperture through a central portion thereof;
a moveable contact arm having a moveable contact arranged on opposite ends and a contact aperture through a central portion thereof;
a pivot pin extending through said rotor aperture and said contact aperture for allowing rotation of said movable contact arm with respect to said rotor; and
a first linkage having a first end and a second end, for preventing re-closure of the movable contact with a fixed contact, pivotally attached to said contact arm at first end and to said rotor at the second end for connecting said contact arm to said rotor.
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Accused Products
Abstract
A circuit breaker rotary contact assembly employs a common pivot between the rotor assembly and the rotary contact arm. A pair of off-center expansion springs directly engage the rotor at one end and engage the rotary contact arm via a linkage arrangement at an opposite end thereof.
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Citations
44 Claims
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1. A circuit breaker moveable contact assembly comprising:
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a circular rotor having a rotor aperture through a central portion thereof; a moveable contact arm having a moveable contact arranged on opposite ends and a contact aperture through a central portion thereof; a pivot pin extending through said rotor aperture and said contact aperture for allowing rotation of said movable contact arm with respect to said rotor; and a first linkage having a first end and a second end, for preventing re-closure of the movable contact with a fixed contact, pivotally attached to said contact arm at first end and to said rotor at the second end for connecting said contact arm to said rotor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A circuit breaker movable contact assembly comprising:
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a rotor having first and second slots formed thereon, a movable contact arm having a movable contact at one end arranged for moving in and out of contact with a fixed contact and a pivot at an opposite end, said pivot being movable attached to said rotor; a linkage having a first end and a second end, for preventing re-closure of the movable contact with a fixed contact, attached to a top part of said movable contact arm at the first end and having the second end attached to a first pin arranged in said first slot within said rotor; and an expansion spring extending between said first and second slots, said spring being attached to said first pin at one end and to a second pin within said second slot at an opposite end thereof. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A circuit breaker comprising:
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a case and a cover; a rotor assembly within said case interconnecting with an operating mechanism and a movable contact arm having a first contact at one end and a second contact at an opposite end thereof, said first movable contact being arranged for moving in and out of contact with a corresponding first fixed contact and said second movable contact being arranged for moving in and out of contact with a corresponding fixed second contact; said rotor assembly including a circular rotor having a rotor aperture through a central portion thereof; a moveable contact arm having a moveable contact arranged on opposite ends and a contact aperture through a central portion thereof; a pivot pin extending through said rotor aperture and said contact aperture for allowing rotation of said movable contact arm with respect to said rotor; and a first linkage having a first end and a second end, for preventing re-closure of the movable contact with a fixed contact, pivotally attached to said contact arm at the first end and to said rotor at the second end for connecting said contact arm to said rotor. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A circuit breaker comprising:
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a case and a cover; a rotor assembly within said case interconnecting with an operating mechanism and a movable contact arm having a movable contact at one end thereof and a pivot at an opposite end, said pivot being movable attached to said rotor, said movable contact being arranged for moving in and out of contact with a corresponding fixed contact, said rotor including a first and second slot on opposing perimeters; a linkage having a first end and a second end, for preventing re-closure of the movable contact with a fixed contact, attached to a top part of said movable contact arm at the first end and having the second end attached to a first pin arranged in said first slot within said rotor; and
an expansion spring extending between said first and second slots, said spring being attached to said first pin at one end and to a second pin within said second slot at an opposite end thereof. - View Dependent Claims (39, 40, 41, 42, 43, 44)
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Specification