US3808567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit breaker with improved resettable latch and trip means
Assignee: Individual
•
Filing: 1973-01-30
•
Granted: 1974-04-30
•
Expires: 1993-01-30
Abstract
Abstract A circuit breaker comprises a stored-energy mechanism and an improved resettable roller-type latch means latching the storedenergy mechanism. The latch means is operable upon the occurrence of overload current conditions to release the stored-energy mechanism to thereby trip the breaker. The latch means may also be manually operated to trip the breaker.
Inventors
- 👤 A Maier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:01
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/50; H01H71/505; H01H2071/506; H01H2071/508; H01H71/12; H01H71/128
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
163 words
A circuit breaker comprising a pair of contacts, a latched releasable member releasable to effect opening of said contacts, latch means latching said releasable member, said latch means comprising a first latch member, first pivot support means in proximity to one end of said first latch member supporting said first latch member for pivotal movement, a first roller means on one of said releasable and first latch members, said first roller means being positioned in proximity to the other end of said first latch member, said first roller means latching said releasable member, a second latch member, a second pivot support means supporting said latch member for pivotal movement, a second roller means on one of said first and second latch members latching said first latch member in proximity to said other end of said first latch member, and means operable to release said second latch member whereupon said second latch member releases said first latch member to thereby release said releasable member.
Claim 2
Dependent Claim
163 words
A circuit breaker comprising a pair of contacts, a latched releasable member releasable to effect opening of said contacts, latch means latching said releasable member, said latch means comprising a first latch member, first pivot support means in proximity to one end of said first latch member supporting said first latch member for pivotal movement, a first roller means on one of said releasable and first latch members, said first roller means being positioned in proximity to the other end of said first latch member, said first roller means latching said releasable member, a second latch member, a second pivot support means supporting said latch member for pivotal movement, a second roller means on one of said first and second latch members latching said first latch member in proximity to said other end of said first latch member, and means operable to release said second latch member whereupon said second latch member releases said first latch member to thereby release said releasable member.
Claim 3
Dependent Claim
33 words
A circuit breaker according to claim 1, and said first roller means comprising a roller member supported on said first latch member in proximity to said other end of said first latch member.
Claim 4
Dependent Claim
30 words
A circuit breaker according to claim 2, and said second roller means being supported on said first latch member in proximity to said other end of said first latch member.
Claim 5
Dependent Claim
80 words
A circuit breaker according to claim 3, said first latch member comprising a pair of spaced arm portions, said first roller member being supported on said spaced arm portions between said spaced arm portions, said second roller means comprising a pair of second rollers supported on the outer sides of said spaced arm portions, and said second latch member comprising a pair of spaced arm portions engaging said second rollers to latch said first latch member in the latched position.
Claim 6
Dependent Claim
93 words
A circuit breaker according to claim 1, a third latch member in a latching position engaging said second latch member to latch said second latch member, said third latch member being operable to an unlatching position, upon movement of said third latch member to the unlatching position said third latch member releasing said second latch member to release said first latch member to thereby release said releasable member, and means operable upon the occurrence of overload current conditions above a predetermined value to automatically move said third latch member to the unlatching position.
Claim 7
Dependent Claim
39 words
A circuit breaker according to claim 5, said circuit breaker comprising an insulating housing, and manually accessible means accessible from outside of said insulating housing and being manually operable to move said third latch member to said unlatching position.
Claim 8
Dependent Claim
93 words
A circuit breaker according to claim 2, a third latch member in a latching position engaging said second latch member to latch said second latch member, said third latch member being movable to an unlatching position, upon movement of said third latch member to the unlatching position said third latch member releasing said second latch member to release said first latch member to thereby release said releasable member, and means operable upon the occurrence of overload current conditions above a predetermined value to automatically move said third latch member To an unlatching position.
Claim 9
Dependent Claim
47 words
A circuit breaker according to claim 7, said circuit breaker comprising an insulating housing, said insulating housing having an opening therein, a manually operable member accessible at sais opening, and said manually operable member being manually operable to move said third latch member to said unlatching position.
Claim 10
Dependent Claim
80 words
A circuit breaker according to claim 3, a third latch member in a latching position engaging said second latch member to latch said second latch member, said third latch member being movable to an unlatching position to release said second latch member to thereby release said first latch member to thereby release said releasable member, and means operable upon the occurrence of overload current conditions above the predetermined value to automatically move said third latch member to said unlatching position.
Claim 11
Dependent Claim
38 words
A circuit breaker according to claim 9, said circuit breaker comprising an insulating housing, and manually operable means accessible from outside of said housing and being manually operable to move said third latch member to said unlatching position.
References Cited (Backward Citations)
US2794881A
Cited
US3460075A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-29 | 1977-10-29 | 1978-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-29 | 1981-10-29 | 1982-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-29 | 1985-10-29 | 1986-04-30 | $7700.00 | Window Closed / Lapsed |