US3122316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plural stage temperature control
Assignee: Stone J and Co Ltd
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Filing: 1961-04-20
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Granted: 1964-02-25
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Expires: 1981-04-20
Abstract
No abstract record available.
Inventors
- 👤 Leigh Bertram Robert
- 👤 Thomas Leonard George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:35
CPC Classifications
B; B61; B61D; B61D27/00; B61D27/0036; B61D27/0045; B60; B60L; B60L1/00; B60L1/02; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1906; G05D23/1912; G05D23/20; G05D23/24; B60L2200/00; B60L2200/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
196 words
A SYSTEM ADAPTED FOR THE CONTROL OF ELECTRICAL APPARATUS, DIVIDED INTO AT LEAST TWO PARTS, TO BE SWITCHED ON IN SUCCESSION, FOR INFLUENCING TEMPERATURE, SAID SYSTEM COMPRISING, FOR EACH PART, SWITCHING MEANS ADAPTED TO CONTROL THE SWITCHING ON AND OFF OF THE PART, A THERMOSTATIC DEVICE CONNECTED WITH THE SWITCHING MEANS FOR A FIRST PART AND ARRANGED TO CONTROL THAT SWITCHING MEANS, A TEMPERATURE-SENSITIVE RESISTANCE ELEMENT CONNECTED WITH THE SWITCHING MEANS FOR A SECOND PART AND ARRANGED TO CONTROL THAT SWITCHING MEANS, THE SAID RESISTANCE ELEMENT BEING OF THE KIND HAVING A LOW RESISTANCE AT ITS WORKING TEMPERATURE AND A HIGH RESISTANCE AT NORMAL AMBIENT TEMPERATURE, AND A BIAS HEATER PROVIDED ON THE SAID RESISTANCE ELEMENT AND ARRANGED TO BE DE-ENERGISED AND ENERGISED BY THE SAID SWITCHING MEANS FOR A FIRST PART WHEN THE SAID SWITCHING MEANS OPERATES TO SWITCH ON AND SWITCH OFF THAT PART, THE TIME REQUIRED BY THE SAID BIAS HEATED RESISTANCE ELEMENT TO COOL DOWN AND HEAT UP RESPECTIVELY PRODUCING A DELAY BETWEEN THE OPERATION OF THE SWITCHING MEANS FOR THE PARTS BOTH ON THEIR SUCCESSIVE OPERATION FOR SWITCHING ON THE PARTS AND ON THEIR SUCCESSIVE OPERATION FOR SWITCHING OFF THE PARTS.
Claim 2
Independent Claim
196 words
A SYSTEM ADAPTED FOR THE CONTROL OF ELECTRICAL APPARATUS, DIVIDED INTO AT LEAST TWO PARTS, TO BE SWITCHED ON IN SUCCESSION, FOR INFLUENCING TEMPERATURE, SAID SYSTEM COMPRISING, FOR EACH PART, SWITCHING MEANS ADAPTED TO CONTROL THE SWITCHING ON AND OFF OF THE PART, A THERMOSTATIC DEVICE CONNECTED WITH THE SWITCHING MEANS FOR A FIRST PART AND ARRANGED TO CONTROL THAT SWITCHING MEANS, A TEMPERATURE-SENSITIVE RESISTANCE ELEMENT CONNECTED WITH THE SWITCHING MEANS FOR A SECOND PART AND ARRANGED TO CONTROL THAT SWITCHING MEANS, THE SAID RESISTANCE ELEMENT BEING OF THE KIND HAVING A LOW RESISTANCE AT ITS WORKING TEMPERATURE AND A HIGH RESISTANCE AT NORMAL AMBIENT TEMPERATURE, AND A BIAS HEATER PROVIDED ON THE SAID RESISTANCE ELEMENT AND ARRANGED TO BE DE-ENERGISED AND ENERGISED BY THE SAID SWITCHING MEANS FOR A FIRST PART WHEN THE SAID SWITCHING MEANS OPERATES TO SWITCH ON AND SWITCH OFF THAT PART, THE TIME REQUIRED BY THE SAID BIAS HEATED RESISTANCE ELEMENT TO COOL DOWN AND HEAT UP RESPECTIVELY PRODUCING A DELAY BETWEEN THE OPERATION OF THE SWITCHING MEANS FOR THE PARTS BOTH ON THEIR SUCCESSIVE OPERATION FOR SWITCHING ON THE PARTS AND ON THEIR SUCCESSIVE OPERATION FOR SWITCHING OFF THE PARTS.
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) | 1967-02-24 | 1967-08-26 | 1968-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-24 | 1971-08-26 | 1972-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-24 | 1975-08-26 | 1976-02-25 | $7700.00 | Window Closed / Lapsed |