Patent US3216403A successfully refreshed from Google Patents.
US3216403A
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Method for controlling a once-through boiler and controlling system for performing the method
Assignee: Burmeister and Wain AS
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Filing: 1963-08-26
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Granted: 1965-11-09
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Expires: 1983-08-26
Abstract
No abstract record available.
Inventors
- 👤 Kollerup Vagn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:17
CPC Classifications
F; F22; F22B; F22B35/00; F22B35/06; F22B35/10; F22D; F22D11/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
IN THE OPERATION OF A ONCE-THROUGH BOILER, EMPLOYING WATER AS THE WORKING MEDIUM THEREIN, SAID BOILER BEING CONTROLLED BY ADJUSTMENT OF THE RATE OF AT LEAST ONE OF TWO DECISIVE FACTORS, VIZ. THE FEED WATER INPUT AND THE INPUT OF HEATING CALORIES, IN RESPONSE TO HEAT CONTENT OF THE WORKING MEDIUM, THE METHOD WHICH COMPRISES MEASURING THE TEMPERATURE OF A QUANTITY OF THE WORKING MEDIUM TAKEN FROM A POINT IN THE BOILDER WHERE THE SAID MEDIUM AT LEAST PARTIALLY IS IN THE FORM OF VAPOUR, THE PRESSURE OF SAID QUANTITY OF SAID WORKING MEDIUM HAVING BEEN REDUCED TO A PREDETERMINED CONSTANT VALUE, SUPPLYING SAID QUANTITY OF MEDIUM WITH A QUANTITY OF HEAT TO BRING SAID TEMPERATURE TO A PREDETERMINED CONSTANT VALUE, THE PRESSURE OF THE SAID MEASURED QUANTITY BEING MAINTAINED AT SAID REDUCED VALUE, AND CONVERTING SAID QUANTITY OF HEAT INTO AN ADJUSTMENT OF THE RATE OF INPUT OF AT LEAST ONE OF SAID DECISIVE FACTORS.
Claim 2
Dependent Claim
156 words
IN THE OPERATION OF A ONCE-THROUGH BOILER, EMPLOYING WATER AS THE WORKING MEDIUM THEREIN, SAID BOILER BEING CONTROLLED BY ADJUSTMENT OF THE RATE OF AT LEAST ONE OF TWO DECISIVE FACTORS, VIZ. THE FEED WATER INPUT AND THE INPUT OF HEATING CALORIES, IN RESPONSE TO HEAT CONTENT OF THE WORKING MEDIUM, THE METHOD WHICH COMPRISES MEASURING THE TEMPERATURE OF A QUANTITY OF THE WORKING MEDIUM TAKEN FROM A POINT IN THE BOILDER WHERE THE SAID MEDIUM AT LEAST PARTIALLY IS IN THE FORM OF VAPOUR, THE PRESSURE OF SAID QUANTITY OF SAID WORKING MEDIUM HAVING BEEN REDUCED TO A PREDETERMINED CONSTANT VALUE, SUPPLYING SAID QUANTITY OF MEDIUM WITH A QUANTITY OF HEAT TO BRING SAID TEMPERATURE TO A PREDETERMINED CONSTANT VALUE, THE PRESSURE OF THE SAID MEASURED QUANTITY BEING MAINTAINED AT SAID REDUCED VALUE, AND CONVERTING SAID QUANTITY OF HEAT INTO AN ADJUSTMENT OF THE RATE OF INPUT OF AT LEAST ONE OF SAID DECISIVE FACTORS.
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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |