US3254494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature control apparatus
Assignee: E H SARGENT AND CO
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Filing: 1964-11-10
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Granted: 1966-06-07
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Expires: 1984-11-10
Abstract
No abstract record available.
Inventors
- 👤 Elie S Chartouni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:44
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/1919
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
IN COMBINATION, A REVERSIBLE SOLID STATE THERMOELECTRIC HEAT PUMP TO REMOVE HEAT FROM A GIVEN MEDIUM WHEN CURRENT FLOWS THERETHROUGH IN ONE DIRECTION AND TO SUPPLY HEAT TO THE MEDIUM DURING THE OPPOSITE DIRECTION OF CURRENT FLOW THERETHROUGH, TEMPERATURE RESPONSIVE CIRCUIT MEANS FOR PROVIDING A SIGNAL OF ONE PHASE WHEN THE TEMPERATURE OF SAID MEDIUM IS ABOVE A GIVEN REFERENCE TEMPERATURE AND FOR PROVIDING A SIGNAL OF OPPOSITE PHASE TO SAID ONE PHASE WHEN THE TEMPERATURE OF SAID MEDIUM IS BELOW SAID REFERENCE TEMPERATURE, CONTROL CIRCUIT MEANS RESPONSIVE TO SAID SIGNAL OF ONE PHASE FOR DIRECTING A SUBSTANTIALLY STEADY CURRENT IN ONE DIRECTION THROUGH SAID HEAT PUMP TO EFFECT REMOVAL OF HEAT FROM SAID MEDIUM AND RESPONSIVE TO SAID SIGNAL OF OPPOSITE PHASE FOR DIRECTING A PULSING CURRENT IN SAID OPPOSITE DIRECTION THERETHROUGH TO ADD HEAT TO SAID MEDIUM.
Claim 2
Dependent Claim
139 words
IN COMBINATION, A REVERSIBLE SOLID STATE THERMOELECTRIC HEAT PUMP TO REMOVE HEAT FROM A GIVEN MEDIUM WHEN CURRENT FLOWS THERETHROUGH IN ONE DIRECTION AND TO SUPPLY HEAT TO THE MEDIUM DURING THE OPPOSITE DIRECTION OF CURRENT FLOW THERETHROUGH, TEMPERATURE RESPONSIVE CIRCUIT MEANS FOR PROVIDING A SIGNAL OF ONE PHASE WHEN THE TEMPERATURE OF SAID MEDIUM IS ABOVE A GIVEN REFERENCE TEMPERATURE AND FOR PROVIDING A SIGNAL OF OPPOSITE PHASE TO SAID ONE PHASE WHEN THE TEMPERATURE OF SAID MEDIUM IS BELOW SAID REFERENCE TEMPERATURE, CONTROL CIRCUIT MEANS RESPONSIVE TO SAID SIGNAL OF ONE PHASE FOR DIRECTING A SUBSTANTIALLY STEADY CURRENT IN ONE DIRECTION THROUGH SAID HEAT PUMP TO EFFECT REMOVAL OF HEAT FROM SAID MEDIUM AND RESPONSIVE TO SAID SIGNAL OF OPPOSITE PHASE FOR DIRECTING A PULSING CURRENT IN SAID OPPOSITE DIRECTION THERETHROUGH TO ADD HEAT TO SAID MEDIUM.
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) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |