US3171019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature control system
Assignee: Motors Liquidation Co
•
Filing: 1961-04-26
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Granted: 1965-02-23
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Expires: 1981-04-26
Abstract
No abstract record available.
Inventors
- 👤 John W Riddel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:16
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/1906; G05D23/1909
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A TEMPERATURE CONTROL CIRCUIT COMPRISING A POWER SUPPLY, A FIRST RESISTOR AND A RELAY COIL IN SERIES THEREWITH, SAID RESISTOR BEING SUBJECT TO THE TEMPERATURE TO BE CONTROLLED AND HAVING ITS VALUE DEPENDENT THEREON, SAID RELAY HAVING CONTACTS OPENED AT A FIRST LEVEL OF COIL CURRENT AND CLOSED AT A SECOND LEVEL OF COIL CURRENT, AND MEANS FOR CHANGING THE COIL CURRENT FROM ONE LEVEL TO A VALUE CLOSE TO THE OTHER LEVEL UPON ACTUATION OF THE CONTACTS INCLUDING A SECOND RESISTOR ACROSS THE RELAY CONTACTS AND IN SERIES WITH THE FIRST RESISTOR.
Claim 2
Dependent Claim
93 words
A TEMPERATURE CONTROL CIRCUIT COMPRISING A POWER SUPPLY, A FIRST RESISTOR AND A RELAY COIL IN SERIES THEREWITH, SAID RESISTOR BEING SUBJECT TO THE TEMPERATURE TO BE CONTROLLED AND HAVING ITS VALUE DEPENDENT THEREON, SAID RELAY HAVING CONTACTS OPENED AT A FIRST LEVEL OF COIL CURRENT AND CLOSED AT A SECOND LEVEL OF COIL CURRENT, AND MEANS FOR CHANGING THE COIL CURRENT FROM ONE LEVEL TO A VALUE CLOSE TO THE OTHER LEVEL UPON ACTUATION OF THE CONTACTS INCLUDING A SECOND RESISTOR ACROSS THE RELAY CONTACTS AND IN SERIES WITH THE FIRST RESISTOR.
References Cited (Backward Citations)
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US2229432A
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US2768274A
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US2713130A
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US2976463A
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US2866067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |