Patent US5043790A successfully refreshed from Google Patents.
US3201547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compensated thermomotive flasher
Assignee: Signal Stat Corp
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Filing: 1961-08-11
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Granted: 1965-08-17
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Expires: 1981-08-11
Abstract
No abstract record available.
Inventors
- 👤 Arthur F Bleiweiss
- 👤 Colombo George
- 👤 John B Dickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:11
CPC Classifications
H; H01; H01H; H01H61/00; H01H61/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
299 words
A THERMOMOTIVE CIRCUIT BREAKER COMPRISING, IN COMBINATION, AN INSULATING BASE, A SNAP ACTION ELEMENT SUPPORTED FROM SAID BASE AND NORMALLY CONSTRAINED TO ASSUME A PRE-SET RESTORED POSITION, A RELATIVELY ELONGATED HEAT EXPANSION ELECTRIC RESISTANCE ELEMENT SECURED TO SAID SNAP ACTION ELEMENT AND, IN ITS COLD AND CONTRACTED STATE, CONSTRAINING SAID SNAP ACTION ELEMENT SNAPPED TO A STRESSDEFORMED POSITION, SAID SNAP ACTION ELEMENT SNAPPING TO ITS RESTORED POSITION UPON PRE-SET EXPANSION OF SAID RESISTANCE ELEMENT, A PAIR OF LOAD CIRCUITS CONTROLLING CONTACTS IN ELECTRIC CIRCUIT CONNECTION WITH SAID RESISTANCE ELEMENT, ONE OF SAID CONTACTS BEING FIXEDLY MOUNTED WITH RESPECT TO SAID BASE, THE OTHER OF SAID CONTACTS BEING CLOSED TO SAID SNAP ACTION ELEMENT AND RESISTANCE ELEMENT ASSEMBLY FOR MOVEMENT THEREWITH, SAID CONTACTS BEING CLOSED IN ONE POSITION OF SAID SNAP ACTION ELEMENT, FOR FLOW OF CURRENT THROUGH SAID SNAP ACTION ELEMENT AND RESISTANCE ELEMENT ASSEMBLY, AND BEING OPEN IN THE OTHER POSITION OF SAID SNAP ACTION ELEMENT, AN INPUT TERMINAL CARRIED BY SAID BASE AND ELECTRICALLY CONNECTED TO SAID ONE OF SAID CONTACTS, A SHUNT CIRCUIT INCLUDING A FIXED RESISTANCE AND NORMALLY OPEN SWITCH MEANS IN SERIES WITH SAID FIXED RESISTANCE, SAID SHUNT CIRCUIT BEING ELECTRICALLY CONNECTED ACROSS SAID INPUT TERMINAL AND SAID SNAP ACTION ELEMENT, SAID SHUNT CIRCUIT OPERABLE, WHEN CLOSED, TO COMPLETE A CIRCUIT IN PARALLEL ELECTRIC CIRCUIT CONNECTION WITH SAID SNAP ACTION ELEMENT, SAID RESISTANCE ELEMENT AND SAID CONTACTS, SWITCH OPERATING MEANS OPERATIVELY ASSOCIATED WITH SAID SWITCH MEANS FOR CONTROLLING SAME, AND CIRCUIT MEANS INTERCONNECTING SAID SWITCH OPERATING MEANS AND SAID ONE OF SAID CONTACTS ANE EFFECTIVE TO APPLY TO SAID SWITCH OPERATING MEANS, A POTENTIAL PROPORTIONAL TO ANY POTENTIAL APPLIED ACROSS SAID CONTATS, SAID SWITCH OPERATING MEANS, WHEN SAID POTENTIAL EXCEEDS A PRE-SET VALUE, CLOSING SAID NORMALLY OPEN SWITCH MEANS TO COMPLETE SAID SHUNT CIRCUIT.
Claim 2
Dependent Claim
299 words
A THERMOMOTIVE CIRCUIT BREAKER COMPRISING, IN COMBINATION, AN INSULATING BASE, A SNAP ACTION ELEMENT SUPPORTED FROM SAID BASE AND NORMALLY CONSTRAINED TO ASSUME A PRE-SET RESTORED POSITION, A RELATIVELY ELONGATED HEAT EXPANSION ELECTRIC RESISTANCE ELEMENT SECURED TO SAID SNAP ACTION ELEMENT AND, IN ITS COLD AND CONTRACTED STATE, CONSTRAINING SAID SNAP ACTION ELEMENT SNAPPED TO A STRESSDEFORMED POSITION, SAID SNAP ACTION ELEMENT SNAPPING TO ITS RESTORED POSITION UPON PRE-SET EXPANSION OF SAID RESISTANCE ELEMENT, A PAIR OF LOAD CIRCUITS CONTROLLING CONTACTS IN ELECTRIC CIRCUIT CONNECTION WITH SAID RESISTANCE ELEMENT, ONE OF SAID CONTACTS BEING FIXEDLY MOUNTED WITH RESPECT TO SAID BASE, THE OTHER OF SAID CONTACTS BEING CLOSED TO SAID SNAP ACTION ELEMENT AND RESISTANCE ELEMENT ASSEMBLY FOR MOVEMENT THEREWITH, SAID CONTACTS BEING CLOSED IN ONE POSITION OF SAID SNAP ACTION ELEMENT, FOR FLOW OF CURRENT THROUGH SAID SNAP ACTION ELEMENT AND RESISTANCE ELEMENT ASSEMBLY, AND BEING OPEN IN THE OTHER POSITION OF SAID SNAP ACTION ELEMENT, AN INPUT TERMINAL CARRIED BY SAID BASE AND ELECTRICALLY CONNECTED TO SAID ONE OF SAID CONTACTS, A SHUNT CIRCUIT INCLUDING A FIXED RESISTANCE AND NORMALLY OPEN SWITCH MEANS IN SERIES WITH SAID FIXED RESISTANCE, SAID SHUNT CIRCUIT BEING ELECTRICALLY CONNECTED ACROSS SAID INPUT TERMINAL AND SAID SNAP ACTION ELEMENT, SAID SHUNT CIRCUIT OPERABLE, WHEN CLOSED, TO COMPLETE A CIRCUIT IN PARALLEL ELECTRIC CIRCUIT CONNECTION WITH SAID SNAP ACTION ELEMENT, SAID RESISTANCE ELEMENT AND SAID CONTACTS, SWITCH OPERATING MEANS OPERATIVELY ASSOCIATED WITH SAID SWITCH MEANS FOR CONTROLLING SAME, AND CIRCUIT MEANS INTERCONNECTING SAID SWITCH OPERATING MEANS AND SAID ONE OF SAID CONTACTS ANE EFFECTIVE TO APPLY TO SAID SWITCH OPERATING MEANS, A POTENTIAL PROPORTIONAL TO ANY POTENTIAL APPLIED ACROSS SAID CONTATS, SAID SWITCH OPERATING MEANS, WHEN SAID POTENTIAL EXCEEDS A PRE-SET VALUE, CLOSING SAID NORMALLY OPEN SWITCH MEANS TO COMPLETE SAID SHUNT CIRCUIT.
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) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |