US3774126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-pole type fuseless circuit breaker
Assignee: Toshiba Corp
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Filing: 1972-11-09
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Granted: 1973-11-20
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Expires: 1992-11-09
Abstract
Abstract A multi-pole type fuseless circuit breaker comprising a molded casing made of insulating material, a plurality of switching mechanisms mounted in the casing and having a common manually operable handle, and automatic trip devices respectively combined with the corresponding switching mechanisms. Each of the automatic trip devices respectively includes an actuator member secured to a latching member thereof and extending toward a latching member of an adjacent automatic trip device. The actuator member has a free end which is normally separated from the adjacent actuator through a gap and is engageable with the adjacent actuator member to cause successive tripping thereof when the former has finished its tripping operation prior to the latter being actuated.
Inventors
- 👤 Y Araki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:57
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/1009; H01H71/1027; H01H2071/1036
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
245 words
A multi-pole type fuseless circuit breaker comprising: a molded casing constructed of an insulating material; at least two stationary contacts mounted in said casing; at least two movable contact assemblies mounted in said casing and respectively having a movable contact to make and break a corresponding one of said stationary contacts; a manually operable handle mounted in said casing to move said movable contact assemblies between circuit closed and open positions; at least two releasable members mounted in said casing and respectively having one end pivotally supported on said casing; tension springs respectively stretched between each of said releasable members and a corresponding one of said movable contact assemblies to maintain contact pressure between said movable and stationary contacts thereof; at least two automatic trip devices mounted in said casing and respectively having a swingable member with one end pivotally supported on said casing; each of said swingable members having a recess for latching the other end of said releasable member to hold said movable contact assembly in a contact closed position; each of said swingable members also having an actuator member extending toward an adjacent swingable member of an adjacent automatic trip device; each of said actuator members having a free end normally separated through a gap from said adjacent swingable member; whereby said free ends of said actuator members are capable of engagement with an adjacent swingable member to cause successive tripping thereof when a trip operation of a preceding trip device occurs.
Claim 2
Dependent Claim
245 words
A multi-pole type fuseless circuit breaker comprising: a molded casing constructed of an insulating material; at least two stationary contacts mounted in said casing; at least two movable contact assemblies mounted in said casing and respectively having a movable contact to make and break a corresponding one of said stationary contacts; a manually operable handle mounted in said casing to move said movable contact assemblies between circuit closed and open positions; at least two releasable members mounted in said casing and respectively having one end pivotally supported on said casing; tension springs respectively stretched between each of said releasable members and a corresponding one of said movable contact assemblies to maintain contact pressure between said movable and stationary contacts thereof; at least two automatic trip devices mounted in said casing and respectively having a swingable member with one end pivotally supported on said casing; each of said swingable members having a recess for latching the other end of said releasable member to hold said movable contact assembly in a contact closed position; each of said swingable members also having an actuator member extending toward an adjacent swingable member of an adjacent automatic trip device; each of said actuator members having a free end normally separated through a gap from said adjacent swingable member; whereby said free ends of said actuator members are capable of engagement with an adjacent swingable member to cause successive tripping thereof when a trip operation of a preceding trip device occurs.
Claim 3
Dependent Claim
62 words
A multi-pole type fuseless circuit breaker according to claim 1, wherein said actuator members of said swingable members respectively have an L-shaped configuration and are secured to said swingable member with an arm thereof extending toward an adjacent swingable member and having a free end overlapping a projection laterally projected from said adjacent swingable member with an air gap normally disposed therebetween.
Claim 4
Dependent Claim
63 words
A multi-pole type fuseless circuit breaker according to claim 1, wherein said actuator member of at least one of said swingable members has a Z-shaped configuration and a pair of arms extending laterally and oppositely therefrom, said arms of Z-shaped actuator member respectively having a free end overlapping a projection projected laterally from adjacent swingable members with an air gap normally provided therebetween.
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 |