US3600541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit breaker operating mechanism having torsion bar springs
Assignee: Allis Chalmers Corp
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Filing: 1969-11-06
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Granted: 1971-08-17
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Expires: 1989-11-06
Abstract
Abstract A circuit breaker operating mechanism comprises one or more supporting frame members on which a movable contact operating means, including a collapsible toggle linkage, is mounted. One or more torsion bars, each having a fixed end attached to a frame member and a rotatable working end, are mounted on the frame members. A pivotable member or crank on the frame members cooperates with the toggle linkage and the working end of the torsion bar. A manually operable handle or motor-driven cam moves the crank to a position wherein it allows the toggle linkage to assume its contact open position and wherein the crank charges the torsion bar. A releasable latching means holds the crank in such position until it is released, whereupon the torsion bar rotates the crank which, in turn, moves the toggle linkage to contact closed position.
Inventors
- 👤 Edwin C Goodwin Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:24
CPC Classifications
H; H01; H01H; H01H3/00; H01H3/22; H01H3/30; H01H3/3042
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
136 words
In a circuit breaker having supporting means comprising at least one frame member and movable crank means movable toward one position to effect movement of contact operating means in one direction, said crank means being movable to another releasably latchable position which allows the contact operating means to move in another direction, the combination of at least one torsion bar having at least one portion fixed with respect to said supporting means and having a rotatable portion for cooperation with said crank means, said torsion bar being chargeable by movement of said crank means to said other position and said torsion bar effecting movement of said crank means to said one position when the latter is released, said rotatable portion of said torsion bar being rotatable transversely to the direction in which said crank means moves.
Claim 2
Dependent Claim
136 words
In a circuit breaker having supporting means comprising at least one frame member and movable crank means movable toward one position to effect movement of contact operating means in one direction, said crank means being movable to another releasably latchable position which allows the contact operating means to move in another direction, the combination of at least one torsion bar having at least one portion fixed with respect to said supporting means and having a rotatable portion for cooperation with said crank means, said torsion bar being chargeable by movement of said crank means to said other position and said torsion bar effecting movement of said crank means to said one position when the latter is released, said rotatable portion of said torsion bar being rotatable transversely to the direction in which said crank means moves.
Claim 3
Dependent Claim
41 words
A circuit breaker according to claim 1 wherein said supporting means comprises a pair of spaced-apart frame members, wherein said contact operating means is disposed substantially between said frame members, and wherein said torsiOn bar is disposed between said frame members.
Claim 4
Dependent Claim
45 words
A circuit breaker according to claim 1 wherein said supporting means comprises a single frame member, wherein said contact operating means is disposed substantially on either side of said frame member, and wherein said torsion bar is disposed on one side of said frame member.
Claim 5
Dependent Claim
19 words
A circuit breaker according to claim 3 comprising two torsion bars disposed on opposite sides of said frame member.
Claim 6
Dependent Claim
28 words
A circuit breaker according to claim 2 wherein said torsion bar carries a roller on its working end for engagement with a trunnion block on said movable means.
Claim 7
Dependent Claim
30 words
A circuit breaker according to claim 4 wherein each of said torsion bars carries a roller on its working end for engagement with a trunnion block on said movable means.
Claim 8
Dependent Claim
26 words
A circuit breaker according to claim 3 wherein the working end of said torsion bar is connected to said movable means by at least one link.
Claim 9
Dependent Claim
50 words
A circuit breaker according to claim 7 wherein said link assumes an overcenter position with respect to said torsion bar and said movable means when said movable means is moved to said one position and further comprising unlocking means on said support for releasing said link from its overcenter position.
Claim 10
Dependent Claim
46 words
A circuit breaker according to claim 4 wherein the working end of each torsion bar is connected to said movable means by at least one link which assume overcenter positions and further comprising unlocking means on said support for releasing said links from their overcenter positions.
Claim 11
Dependent Claim
27 words
A circuit breaker according to claim 2 wherein the fixed end of said torsion bar is L-shaped and engages a hole in one of said frame members.
Claim 12
Dependent Claim
26 words
A circuit breaker according to claim 3 wherein the fixed end of said torsion bar is L-shaped and engages a hole in said single frame member.
Claim 13
Dependent Claim
34 words
A circuit breaker according to claim 3 wherein the fixed end of said torsion bar is U-shaped and engages two holes provided in a plate which is transversely attached to said single frame member.
Claim 14
Dependent Claim
49 words
A circuit breaker according to claim 3 including a plate transversely attached to said single frame member, a projection extending from said plate, an eyebolt extending from said plate, and another eyebolt extending from said projection, said eyebolts engaging the fixed end of said torsion bar which is U-shaped.
Claim 15
Dependent Claim
12 words
A circuit breaker according to claim 13 wherein said eyebolts are adjustable.
References Cited (Backward Citations)
US2430367A
Cited
US2794881A
Cited
US2919331A
Cited
US3193643A
Cited
US3291947A
Cited
US3327082A
Cited
US3492614A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |