US3240428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time proportioning control system
Assignee: Thermo Electric Co Inc
•
Filing: 1962-04-26
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Granted: 1966-03-15
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Expires: 1982-04-26
Abstract
No abstract record available.
Inventors
- 👤 Umrath Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:21
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/22; G05D23/1906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
IN COMBINATION, A SIGNAL RESPONSIVE CONTROLLER FOR MAINTAINING A CONDITION IN A PRESELECTED STATE; MEANS PROVIDING A FIRST SIGNAL WHICH VARIES IN MAGNITUDE AND SIGN WITH THE EXTENT OF DEPATURE OF THE CONDITION FROM THE PRESELECTED STATE; MEANS DERIVING FROM SAID FIRST SIGNAL A SECOND SIGNAL OF LIKE SIGN AND EQUAL INITIAL MAGNITUDE, WHICH SECOND SIGNAL DECREASES WITH TIME; MEANS NORMALLY APPLYING THE FIRST SIGNAL TO THE CONTROLLER FOR ACTUATION THEREOF TO EFFECT A CHANGE IN THE STATE OF THE CONDITION; AND SWITCH MEANS OPERATED UPON ACTUATION OF THE CONTROLLER TO APPLY THE SECOND SIGNAL TO THE CONTROLLER IN PLACE OF THE FIRST SIGNAL.
Claim 2
Dependent Claim
104 words
IN COMBINATION, A SIGNAL RESPONSIVE CONTROLLER FOR MAINTAINING A CONDITION IN A PRESELECTED STATE; MEANS PROVIDING A FIRST SIGNAL WHICH VARIES IN MAGNITUDE AND SIGN WITH THE EXTENT OF DEPATURE OF THE CONDITION FROM THE PRESELECTED STATE; MEANS DERIVING FROM SAID FIRST SIGNAL A SECOND SIGNAL OF LIKE SIGN AND EQUAL INITIAL MAGNITUDE, WHICH SECOND SIGNAL DECREASES WITH TIME; MEANS NORMALLY APPLYING THE FIRST SIGNAL TO THE CONTROLLER FOR ACTUATION THEREOF TO EFFECT A CHANGE IN THE STATE OF THE CONDITION; AND SWITCH MEANS OPERATED UPON ACTUATION OF THE CONTROLLER TO APPLY THE SECOND SIGNAL TO THE CONTROLLER IN PLACE OF THE FIRST SIGNAL.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |