US3292118A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit breakers with improved trip mechanisms
Assignee: Cutler Hammer Inc
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Filing: 1964-12-21
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Granted: 1966-12-13
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Expires: 1984-12-21
Abstract
No abstract record available.
Inventors
- 👤 Alexander J Pastene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:30
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/12; H01H71/14; H01H71/16; H01H71/1072
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
IN A CIRCUIT BREAKER OF THE TYPE HAVING A SPRING BIASED MECHANISM FOR OPERATING THE BREAKER BETWEEN CIRCUIT-CLOSED AND CIRUCIT-OPEN CONDITIONS AND AN OPERATING LEVER FOR ACTUATING SAID OPERATING MECHANISM, THE COMBINATION COMPRISING: LATCH MEANS ACTING ON SAID OPERATING MECHANISM TO MAINTAIN THE LATTER IN ITS CIRCUIT-CLOSED CONDITION AND BEING RELEASABLE IN RESPONSE TO AN ABNORMAL ELECTRICAL CONDITION TO TRIP SAID OPERATING MECHANISM TO ITS CIRCUIT-OPEN CONDITION; A THERMAL RESPONSIVE DEVICE HAVING A PORTION WHICH MOVES WHEN HEATED UNDER THE INFLUENCE OF AN EXCESSIVE ELECTRO-THERMAL CONDITION IN THE BREAKER; AND MEANS COUPLING SAID MOVABLE PORTION TO SAID LATCH MEANS FOR EFFECTING THE RELEASE OF THE LATTER UPON PREDETERMINED MOVEMENT AND BEING NORMALLY EFFECTIVE TO APPLY A BIAS TENDING TO SEPARATE SAID MOVABLE PORTION OF SAID THERMAL RESPONSIVE DEVICE FROM SAID LATCH MEANS TO PREVENT LOST MOTION THEREBETWEEN WHEN SAID MOVABLE PORTION STARTS TO MOVE AND COMPRISING: MEANS IN SAID COUPLING MEANS RESPONSIVE TO MOVEMENT OF SAID MOVABLE PORTION FOR DECREASING SAID BIAS THEREBY TO REDUCE UPON TRIGGING THE STRESS IMPOSED ON SAID THERMAL RESPONSIVE DEVICE WHEN IT IS HOT.
Claim 2
Dependent Claim
179 words
IN A CIRCUIT BREAKER OF THE TYPE HAVING A SPRING BIASED MECHANISM FOR OPERATING THE BREAKER BETWEEN CIRCUIT-CLOSED AND CIRUCIT-OPEN CONDITIONS AND AN OPERATING LEVER FOR ACTUATING SAID OPERATING MECHANISM, THE COMBINATION COMPRISING: LATCH MEANS ACTING ON SAID OPERATING MECHANISM TO MAINTAIN THE LATTER IN ITS CIRCUIT-CLOSED CONDITION AND BEING RELEASABLE IN RESPONSE TO AN ABNORMAL ELECTRICAL CONDITION TO TRIP SAID OPERATING MECHANISM TO ITS CIRCUIT-OPEN CONDITION; A THERMAL RESPONSIVE DEVICE HAVING A PORTION WHICH MOVES WHEN HEATED UNDER THE INFLUENCE OF AN EXCESSIVE ELECTRO-THERMAL CONDITION IN THE BREAKER; AND MEANS COUPLING SAID MOVABLE PORTION TO SAID LATCH MEANS FOR EFFECTING THE RELEASE OF THE LATTER UPON PREDETERMINED MOVEMENT AND BEING NORMALLY EFFECTIVE TO APPLY A BIAS TENDING TO SEPARATE SAID MOVABLE PORTION OF SAID THERMAL RESPONSIVE DEVICE FROM SAID LATCH MEANS TO PREVENT LOST MOTION THEREBETWEEN WHEN SAID MOVABLE PORTION STARTS TO MOVE AND COMPRISING: MEANS IN SAID COUPLING MEANS RESPONSIVE TO MOVEMENT OF SAID MOVABLE PORTION FOR DECREASING SAID BIAS THEREBY TO REDUCE UPON TRIGGING THE STRESS IMPOSED ON SAID THERMAL RESPONSIVE DEVICE WHEN IT IS HOT.
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |