Patent US3128362A successfully refreshed from Google Patents.
US3128362A
Expired / Lapsed
US
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Heater control system
Assignee: ConocoPhillips Co
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Filing: 1962-05-25
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Granted: 1964-04-07
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Expires: 1982-05-25
Abstract
No abstract record available.
Inventors
- 👤 Fred V Clark
- 👤 Blount C Trice
- 👤 Geraldene Y Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:49
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/2451; G05D23/2456
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
196 words
A CONTROL SYSTEM FOR AN ELECTRICALLY HEATED OVEN HAVING A PROPORTIONATELY CONTROLLED HEATING ELEMENT AND A BOOSTER HEATING ELEMENT, THE CONTROL SYSTEM COMPRISING: A CONTROL CIRCUIT HAVING MEANS FOR PRODUCING A CURRENT THEREIN PROPORTIONAL TO THE DIFFERENCE BETWEEN THE ACTUAL TEMPERATURE AND THE DESIRED OPERATING TEMPERATURE OF THE OVEN; MEANS RESPONSIVE TO THE CURRENT IN THE CONTROL CIRCUIT FOR DELIVERING ELECTRICAL POWER TO THE PROPORTIONATELY CONTROLLED HEATING ELEMENT IN PROPORTION TO SAID CURRENT IN THE CONTROL CIRCUIT; A SOURCE OF POWER; RELAY MEANS HAVING A FIRST POSITION FOR DELIVERING FULL SOURCE POWER TO THE BOOSTER HEATING ELEMENT RESPONSIVE TO SAID CURRENT IN THE CONTROL CIRCUIT, AND HAVING A SECOND POSITION WHEN SAID RELAY IS DE-ENERGIZED; CIRCUIT MEANS FOR ENERGIZING SAID RELAY MEANS TO SAID FIRST POSITION TO DELIVER POWER TO THE BOOSTER HEATING ELEMENT UNTIL THE OVEN IS HEATED TO THE DESIRED OPERATING TEMPERATURE AND CURRENT NO LONGER FLOWS IN THE CONTROL CIRCUIT CAUSING SAID RELAY TO DE-ENERGIZE TO SAID SECOND POSITION; AND MEANS FOR PREVENTING SUBSEQUENT ENERGIZATION OF THE RELAY MEANS UPON CURRENT SUBSEQUENTLY BEING PRODUCED IN THE CONTROL CIRCUIT DUE TO A DIFFERENCE IN ACTUAL TEMPERATURE AND THE DESIRED OPERATING TEMPERATURE OF THE OVEN.
Claim 2
Dependent Claim
196 words
A CONTROL SYSTEM FOR AN ELECTRICALLY HEATED OVEN HAVING A PROPORTIONATELY CONTROLLED HEATING ELEMENT AND A BOOSTER HEATING ELEMENT, THE CONTROL SYSTEM COMPRISING: A CONTROL CIRCUIT HAVING MEANS FOR PRODUCING A CURRENT THEREIN PROPORTIONAL TO THE DIFFERENCE BETWEEN THE ACTUAL TEMPERATURE AND THE DESIRED OPERATING TEMPERATURE OF THE OVEN; MEANS RESPONSIVE TO THE CURRENT IN THE CONTROL CIRCUIT FOR DELIVERING ELECTRICAL POWER TO THE PROPORTIONATELY CONTROLLED HEATING ELEMENT IN PROPORTION TO SAID CURRENT IN THE CONTROL CIRCUIT; A SOURCE OF POWER; RELAY MEANS HAVING A FIRST POSITION FOR DELIVERING FULL SOURCE POWER TO THE BOOSTER HEATING ELEMENT RESPONSIVE TO SAID CURRENT IN THE CONTROL CIRCUIT, AND HAVING A SECOND POSITION WHEN SAID RELAY IS DE-ENERGIZED; CIRCUIT MEANS FOR ENERGIZING SAID RELAY MEANS TO SAID FIRST POSITION TO DELIVER POWER TO THE BOOSTER HEATING ELEMENT UNTIL THE OVEN IS HEATED TO THE DESIRED OPERATING TEMPERATURE AND CURRENT NO LONGER FLOWS IN THE CONTROL CIRCUIT CAUSING SAID RELAY TO DE-ENERGIZE TO SAID SECOND POSITION; AND MEANS FOR PREVENTING SUBSEQUENT ENERGIZATION OF THE RELAY MEANS UPON CURRENT SUBSEQUENTLY BEING PRODUCED IN THE CONTROL CIRCUIT DUE TO A DIFFERENCE IN ACTUAL TEMPERATURE AND THE DESIRED OPERATING TEMPERATURE OF THE OVEN.
References Cited (Backward Citations)
US1183925A
Cited
US2805311A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |