US3353589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic control circuit for regulating temperature
Assignee: Whirlpool Corp
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Filing: 1965-10-22
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Granted: 1967-11-21
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Paul H Tope
- 👤 Burke J Crane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:19
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/1906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
APPARATUS FOR MAINTAINING A ZONE AT A PRESELECTED TEMPERATURE COMPRISING: MEANS FOR CHANGING THE TEMPERATURE IN SAID ZONE INCLUDING COOLING MEANS AND HEATING MEANS; MEANS FOR SENSING THE TEMPERATURE IN SAID ZONE; ELECTRICAL CIRCUIT MEANS FOR EFFECTING THE OPERATING OF SAID COOLING MEANS AND SAID HEATING MEANS; MEANS RESPONSIVE TO SAID SENSING MEANS FOR PROVIDING A VOLTAGE IN SAID CIRCUIT MEANS INFINITELY VARIABLE AS A FUNCTION OF A DEVIATION IN THE ZONE TEMPERTURE BELOW THE PRESELECTED TEMPERATURE; AND SEMICAONDUCTOR CONTROL MEANS RESPONSIVE TO SAID VARIABLE VOLTAGE IN SAID CIRCUIT FOR VARIABLY ENERGIZING SAID HEATING MEANS AS A DIRECT FUNCTION OF THE AMOUNT OF SAID TEMPERATURE VARIATION.
Claim 2
Dependent Claim
106 words
APPARATUS FOR MAINTAINING A ZONE AT A PRESELECTED TEMPERATURE COMPRISING: MEANS FOR CHANGING THE TEMPERATURE IN SAID ZONE INCLUDING COOLING MEANS AND HEATING MEANS; MEANS FOR SENSING THE TEMPERATURE IN SAID ZONE; ELECTRICAL CIRCUIT MEANS FOR EFFECTING THE OPERATING OF SAID COOLING MEANS AND SAID HEATING MEANS; MEANS RESPONSIVE TO SAID SENSING MEANS FOR PROVIDING A VOLTAGE IN SAID CIRCUIT MEANS INFINITELY VARIABLE AS A FUNCTION OF A DEVIATION IN THE ZONE TEMPERTURE BELOW THE PRESELECTED TEMPERATURE; AND SEMICAONDUCTOR CONTROL MEANS RESPONSIVE TO SAID VARIABLE VOLTAGE IN SAID CIRCUIT FOR VARIABLY ENERGIZING SAID HEATING MEANS AS A DIRECT FUNCTION OF THE AMOUNT OF SAID TEMPERATURE VARIATION.
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) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |