US3773995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor advanced spring charging pawl and ratchet mechanism with spring assist
Assignee: Westinghouse Electric Corp
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Filing: 1972-10-27
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Granted: 1973-11-20
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Expires: 1992-10-27
Abstract
Abstract A circuit breaker operating mechanism characterized by a crank shaft, a closing spring connected to the crank shaft, motoroperating structure for driving the crank shaft to charge the closing spring, a ratchet wheel mounted on the crank shaft, a reciprocating pawl structure supported to drive the ratchet wheel, a motor comprising an output shaft and cam means or driving means on the output shaft operable upon each revolution of the output shaft to operate the pawl structure to advance the ratchet wheel to thereby charge the closing spring, the cam means being operable in directions toward and away from the reciprocating pawl structure, and spring means attached to the output shaft for urging the reciprocating pawl structure only in the direction of advancement of the ratchet wheel.
Inventors
- 👤 N Davies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:30
CPC Classifications
H; H01; H01H; H01H3/00; H01H3/22; H01H3/30; H01H3/3005; H01H3/3021; H01H2003/3063
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
132 words
A circuit breaker comprising a stationary contact, a movable contact, a crank shaft, a closing spring operatively connected to said crank shaft, a ratchet wheel on the crank shaft rotatable with the crank shaft, a reciprocating member having a pawl thereon and being supported to operate the pawl to advance the ratchet wheel upon reciprocation thereof, a motor comprising an output shaft, cam means on the output shaft operable upon rotation of the output shaft to operate the reciprocating member to advance the ratchet wheel to thereby charge the closing spring, the cam means being operable in directions toward and away from the reciprocating member, and spring means attached to one of the reciprocating members and output shaft for urging said member only in the direction of advancement of the ratchet wheel.
Claim 2
Dependent Claim
132 words
A circuit breaker comprising a stationary contact, a movable contact, a crank shaft, a closing spring operatively connected to said crank shaft, a ratchet wheel on the crank shaft rotatable with the crank shaft, a reciprocating member having a pawl thereon and being supported to operate the pawl to advance the ratchet wheel upon reciprocation thereof, a motor comprising an output shaft, cam means on the output shaft operable upon rotation of the output shaft to operate the reciprocating member to advance the ratchet wheel to thereby charge the closing spring, the cam means being operable in directions toward and away from the reciprocating member, and spring means attached to one of the reciprocating members and output shaft for urging said member only in the direction of advancement of the ratchet wheel.
Claim 3
Dependent Claim
17 words
The circuit breaker of claim 1 in which the spring means is attached to the output shaft.
Claim 4
Dependent Claim
27 words
The circuit breaker of claim 2 in which the spring means comprises a tension spring on the side of the cam means corresponding to the reciprocation member.
Claim 5
Dependent Claim
28 words
The circuit breaker of claim 2 in which the spring means comprises a compression spring on the side of the cam means opposite that of the reciprocation member.
Claim 6
Dependent Claim
17 words
The circuit breaker of claim 1 in which the spring means is attached to the reciprocation member.
Claim 7
Dependent Claim
36 words
The circuit breaker of claim 5 in which the spring means comprises a tension spring on the side of the cam means corresponding to the direction of movement of the cam means toward the reciprocating member.
Claim 8
Dependent Claim
136 words
A stored energy mechanism for actuating a load between first and second positions comprising a crank shaft, a closing spring operatively connected to said crank shaft, a ratchet wheel on the crank shaft rotatable with the crank shaft, a reciprocating member having a pawl thereon and being supported to operate the pawl to advance the ratchet wheel upon reciprocation thereof, a motor comprising an output shaft, cam means on the output shaft operable upon rotation of the output shaft to operate the reciprocating member to advance the ratchet wheel to thereby charge the closing spring, the cam means being operable in directions toward and away from the reciprocating member, and spring means attached to one of the reciprocating members and output shaft for urging said member only in the direction of advancement of the ratchet wheel.
Claim 9
Dependent Claim
136 words
A stored energy mechanism for actuating a load between first and second positions comprising a crank shaft, a closing spring operatively connected to said crank shaft, a ratchet wheel on the crank shaft rotatable with the crank shaft, a reciprocating member having a pawl thereon and being supported to operate the pawl to advance the ratchet wheel upon reciprocation thereof, a motor comprising an output shaft, cam means on the output shaft operable upon rotation of the output shaft to operate the reciprocating member to advance the ratchet wheel to thereby charge the closing spring, the cam means being operable in directions toward and away from the reciprocating member, and spring means attached to one of the reciprocating members and output shaft for urging said member only in the direction of advancement of the ratchet wheel.
Claim 10
Dependent Claim
16 words
The mechanism of claim 7 in which the spring means is attached to the output shaft.
Claim 11
Dependent Claim
16 words
The mechanism of claim 7 in which the spring mEans is attached to the reciprocating member.
Claim 12
Dependent Claim
26 words
The mechanism of claim 8 in which the spring means comprises a tension spring on the side of the cam means corresponding to the reciprocating member.
Claim 13
Dependent Claim
27 words
The mechanism of claim 8 in which the spring means comprises a compression spring on the side of the cam means opposite that of the reciprocating member.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |