Patent US2657691A successfully refreshed from Google Patents.
US2737809A
Expired / Lapsed
US
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Double beam radiation pyrometer
Assignee: Leeds and Northrup Co
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Filing: 1950-02-07
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Granted: 1956-03-13
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Expires: 1970-02-07
Abstract
No abstract record available.
Inventors
- 👤 William G Fastie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:45
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/52; G01J5/53; G01J5/532
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
IN A SYSTEM FOR MEASURING THE TEMPERATURE OF AN OPAQUE BODY FROM WHICH RADIANT ENERGY IS EMITTED WHICH COMPRISES A RADIANT ENERGY DIRECTING ELEMENT, MEANS FOR HEATING SAID ELEMENT FOR EMISSION OF RADIANT ENERGY TO A LIMITED AREA OF THE SURFACE OF SAID OPAQUE BODY, MEANS SUPPORTING SAID DIRECTING ELEMENT WITH RESPECT TO SAID LIMITED AREA FOR MULTIPLE REFLECTION OF RADIANT ENERGY THEREBETWEEN EFFECTIVELY TO PRODUCE BLACK-BODY RADIATION FROM SAID LIMITED AREA, TWO RADIATION-RESPONSIVE MEANS EACH RECEIVING SEPARATE RADIANT ENERGY BEAMS RESPECTIVELY FROM SAID ELEMENT AND FROM SAID LIMITED AREA, STRUCTURE COOPERATING WITH ONE OF SAID BEAMS FOR CHANGING ITS NORMAL INTENSITY PRIOR TO RECEIPT BY SAID CORRESPONDING RADIATION-RESPONSIVE MEANS, MEANS FOR ADJUSTING SAID HEATING MEANS TO EQUALIZE THE RADIANT ENERGY BEAMS RECEIVED BY SAID RADIATION-RESPONSIVE MEANS FROM SAID ELEMENT AND FROM SAID LIMITE DAREA, AND TEMPERATURE-RESPONSIVE MEANS THERMALLY ASSOCIATED WITH SAID ELEMENT FOR MEASUREMENT OF THE TEMPERATURE THEREOF AS A MEASUREMENT OF THE TEMPERATURE OF SAID OPAQUE BODY WHEN THE INTENSITIES OF SAID BEAM OF RADIANT ENERGY ARE EQUAL.
Claim 2
Dependent Claim
170 words
IN A SYSTEM FOR MEASURING THE TEMPERATURE OF AN OPAQUE BODY FROM WHICH RADIANT ENERGY IS EMITTED WHICH COMPRISES A RADIANT ENERGY DIRECTING ELEMENT, MEANS FOR HEATING SAID ELEMENT FOR EMISSION OF RADIANT ENERGY TO A LIMITED AREA OF THE SURFACE OF SAID OPAQUE BODY, MEANS SUPPORTING SAID DIRECTING ELEMENT WITH RESPECT TO SAID LIMITED AREA FOR MULTIPLE REFLECTION OF RADIANT ENERGY THEREBETWEEN EFFECTIVELY TO PRODUCE BLACK-BODY RADIATION FROM SAID LIMITED AREA, TWO RADIATION-RESPONSIVE MEANS EACH RECEIVING SEPARATE RADIANT ENERGY BEAMS RESPECTIVELY FROM SAID ELEMENT AND FROM SAID LIMITED AREA, STRUCTURE COOPERATING WITH ONE OF SAID BEAMS FOR CHANGING ITS NORMAL INTENSITY PRIOR TO RECEIPT BY SAID CORRESPONDING RADIATION-RESPONSIVE MEANS, MEANS FOR ADJUSTING SAID HEATING MEANS TO EQUALIZE THE RADIANT ENERGY BEAMS RECEIVED BY SAID RADIATION-RESPONSIVE MEANS FROM SAID ELEMENT AND FROM SAID LIMITE DAREA, AND TEMPERATURE-RESPONSIVE MEANS THERMALLY ASSOCIATED WITH SAID ELEMENT FOR MEASUREMENT OF THE TEMPERATURE THEREOF AS A MEASUREMENT OF THE TEMPERATURE OF SAID OPAQUE BODY WHEN THE INTENSITIES OF SAID BEAM OF RADIANT ENERGY ARE EQUAL.
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) | 1959-03-13 | 1959-09-12 | 1960-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-13 | 1963-09-12 | 1964-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-13 | 1967-09-12 | 1968-03-13 | $7700.00 | Window Closed / Lapsed |