US3211214A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature control circuit
Assignee: Robertshaw Controls Co
•
Filing: 1963-10-02
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Granted: 1965-10-12
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Expires: 1983-10-02
Abstract
No abstract record available.
Inventors
- 👤 William W Chambers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:21
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/30; G05D23/303
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
204 words
A SYSTEM FOR CONTROLLING THE TEMPERATURE OF A GIVEN ENVIRONMENT TO A PREDETERMINED TEMPERATURE COMPRISING: FIRST AND SECOND CONTROLLED RECTIFIERS EACH HAVING AN ANODE, A CATHODE AND A CONTROL ELECTRODE FOR REGULATING THE FIRING OF SAID RECTIFIER WHEN SAID CONTROLLED RECTIFIER IS FORWARDLY BIASED; MEANS CONNECTING THE CATHODE ELECTRODES OF SAID CONTROLLED RECTIFIERS; MEANS FOR ALTERNATELY FORWARD BIASING SAID FIRST AND SECOND CONTROLLED RECTIFIERS, MEANS CONNECTED TO THE CONTROL ELECTRODE OF SAID FIRST CONTROLLED RECTIFIER FOR FEEDING BACK A SIGNAL THERETO RESONSIVE TO THE TEMPERATURE OF SID GIVEN ENVIRONMENT, SAID MEANS CAUSING SAID CONTROLLED RECTIFIER TO PERIODICALLY FIRE DURING INTERVALS OF FORWARD BIAS WHEN THE ENVIRONMENTAL TEMPERATURE IS LOWER THAN SAID PREDETERMINED TEMPERATURE, MEANS CONNECTED TO THE CONTROL ELECTRODE OF SAID SECOND CONTROLLED RECTIFIER FOR FEEDING BACK A SIGNAL THERETO RESPONSIVE TO THE TEMPERATURE OF SAID GIVEN ENVIRONMENT, SAID MEANS CAUSING SAID CONTROLLED RECTIFIER TO PERIODICALLY FIRE DURING INTERVALS OF FORWARD BIAS WHEN THE TEMPERATURE OF SAID ENVIRONMENT IS ABOVE SAID PREDETERMINED TEMPERATURE, MEANS FOR CONTROLLING A HEATING SOURCE CONNECTED IN CIRCUIT WITH THE ANODE AND CATHODE ELECTRODES OF SAID FIRST CONTROLLED RECTIFIER, AND MEANS FOR CONTROLLING A COOLING SOURCE CONNECTED IN CIRCUIT WITH THE AODE AND CATHODE ELECTRODES OF SAID SECOND CONTROLLED RECTIFIER.
Claim 2
Independent Claim
204 words
A SYSTEM FOR CONTROLLING THE TEMPERATURE OF A GIVEN ENVIRONMENT TO A PREDETERMINED TEMPERATURE COMPRISING: FIRST AND SECOND CONTROLLED RECTIFIERS EACH HAVING AN ANODE, A CATHODE AND A CONTROL ELECTRODE FOR REGULATING THE FIRING OF SAID RECTIFIER WHEN SAID CONTROLLED RECTIFIER IS FORWARDLY BIASED; MEANS CONNECTING THE CATHODE ELECTRODES OF SAID CONTROLLED RECTIFIERS; MEANS FOR ALTERNATELY FORWARD BIASING SAID FIRST AND SECOND CONTROLLED RECTIFIERS, MEANS CONNECTED TO THE CONTROL ELECTRODE OF SAID FIRST CONTROLLED RECTIFIER FOR FEEDING BACK A SIGNAL THERETO RESONSIVE TO THE TEMPERATURE OF SID GIVEN ENVIRONMENT, SAID MEANS CAUSING SAID CONTROLLED RECTIFIER TO PERIODICALLY FIRE DURING INTERVALS OF FORWARD BIAS WHEN THE ENVIRONMENTAL TEMPERATURE IS LOWER THAN SAID PREDETERMINED TEMPERATURE, MEANS CONNECTED TO THE CONTROL ELECTRODE OF SAID SECOND CONTROLLED RECTIFIER FOR FEEDING BACK A SIGNAL THERETO RESPONSIVE TO THE TEMPERATURE OF SAID GIVEN ENVIRONMENT, SAID MEANS CAUSING SAID CONTROLLED RECTIFIER TO PERIODICALLY FIRE DURING INTERVALS OF FORWARD BIAS WHEN THE TEMPERATURE OF SAID ENVIRONMENT IS ABOVE SAID PREDETERMINED TEMPERATURE, MEANS FOR CONTROLLING A HEATING SOURCE CONNECTED IN CIRCUIT WITH THE ANODE AND CATHODE ELECTRODES OF SAID FIRST CONTROLLED RECTIFIER, AND MEANS FOR CONTROLLING A COOLING SOURCE CONNECTED IN CIRCUIT WITH THE AODE AND CATHODE ELECTRODES OF SAID SECOND CONTROLLED RECTIFIER.
References Cited (Backward Citations)
US3028473A
Cited
US3051815A
Cited
US3114025A
Cited
US3051813A
Cited
US3062942A
Cited
US3050611A
Cited
US3071676A
Cited
US3097314A
Cited
US3161759A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |