US3166246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of temperature on multiple processes
Assignee: Fielden Electronics Ltd
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Filing: 1962-02-07
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Granted: 1965-01-19
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Expires: 1982-02-07
Abstract
No abstract record available.
Inventors
- 👤 John E Fielden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:23
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/2451; G05D23/2456; G05D23/1927; G05D23/193; G05D23/1932; G05D23/1934
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
MEANS FOR THE CONTROL OF TEMPERATURE ON MULTIPLE PROCESSES, COMPRISING A MULTIPLICITY OF RANDOM VALUE RESISTANCES, ALL OF THE SAME THERMAL CO-EFFICIENT OF ELECTRICAL RESISTANCE, EACH POSITIONED AT A SEPARATE HEAT ZONE TO BE CONTROLLED, A SIMILAR MULTIPLICITY OF ADJUSTABLE RESISTANCES EACH CONNECTED IN SERIES WITH A SAID RANDOM RESISTANCE, AN ELECTRICL SOURCE ACROSS WHICH ALL OF THE SERIES COMBINATIONS OF RANDOM RESISTANCES AND ADJUSTABLE RESISTANCES ARE CONNECTED, AND A SOURCE OF REFERENCE VOLTAGE, THE VALUE OF WHICH CORRESPONDS TO THE DESIRED TEMPERATURE OF ALL THE ZONES, THE RANGE OF ADJUSTMENT OF EACH ADJUSTABLE RESISTANCE BEING SUCH THAT THE VOLTAGE DROPS ACROSS THE RANDOM RESISTANCE MAY BE MADE EQUAL IRRESPECTIVE OF THEIR INDIVIDUAL RESISTANCE VALUES, THE VOLTAGE AT EACH JUNCTION OF RANDOM RESISTANCE AND ADJUSTABLE RESISTANCE BEING COMPARED WITH THE REFERENCE VOLTAGE AND THE RESULTANT SIGNAL BEING USED TO CONTROL A HEATER AT THE RESPECTIVE HEAT ZONE TO MAINTAIN SAID DESIRED TEMPERATURE.
Claim 2
Dependent Claim
152 words
MEANS FOR THE CONTROL OF TEMPERATURE ON MULTIPLE PROCESSES, COMPRISING A MULTIPLICITY OF RANDOM VALUE RESISTANCES, ALL OF THE SAME THERMAL CO-EFFICIENT OF ELECTRICAL RESISTANCE, EACH POSITIONED AT A SEPARATE HEAT ZONE TO BE CONTROLLED, A SIMILAR MULTIPLICITY OF ADJUSTABLE RESISTANCES EACH CONNECTED IN SERIES WITH A SAID RANDOM RESISTANCE, AN ELECTRICL SOURCE ACROSS WHICH ALL OF THE SERIES COMBINATIONS OF RANDOM RESISTANCES AND ADJUSTABLE RESISTANCES ARE CONNECTED, AND A SOURCE OF REFERENCE VOLTAGE, THE VALUE OF WHICH CORRESPONDS TO THE DESIRED TEMPERATURE OF ALL THE ZONES, THE RANGE OF ADJUSTMENT OF EACH ADJUSTABLE RESISTANCE BEING SUCH THAT THE VOLTAGE DROPS ACROSS THE RANDOM RESISTANCE MAY BE MADE EQUAL IRRESPECTIVE OF THEIR INDIVIDUAL RESISTANCE VALUES, THE VOLTAGE AT EACH JUNCTION OF RANDOM RESISTANCE AND ADJUSTABLE RESISTANCE BEING COMPARED WITH THE REFERENCE VOLTAGE AND THE RESULTANT SIGNAL BEING USED TO CONTROL A HEATER AT THE RESPECTIVE HEAT ZONE TO MAINTAIN SAID DESIRED TEMPERATURE.
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) | 1968-01-19 | 1968-07-20 | 1969-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-19 | 1972-07-20 | 1973-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-19 | 1976-07-20 | 1977-01-19 | $7700.00 | Window Closed / Lapsed |