US3437822A
Expired / Lapsed
US
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Method and apparatus for measuring radiation absorption employing a feedback amplifier to control the lamp supply
Assignee: Vickers Ltd
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Filing: 1966-04-12
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Granted: 1969-04-08
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Expires: 1986-04-12
Abstract
No abstract record available.
Inventors
- 👤 Alan Edward Fitzsimmons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:04
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/255; G01J; G01J1/00; G01J1/10; G01J1/16; G01J1/20; G01J1/28; G01J1/30; G01N21/27; G01N21/274; G01N21/276
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A RADIATION-ABSORPTION MEASURING DEVICE COMPRISING: (A) A RADIATION SOURCE FOR SUPPLYING RADIATION AT A VARIABLE SOURCE OUTPUT POWER TO A SAMPLE OF A SUBSTANCE TO BE INVESTIGATED; (B) A RADIATION-SENSITIVE MEMBER FOR RECEIVING RADIATION TRANSMITTED THROUGH A SAMPLE FROM SAID SOURCE AND CONNECTED FOR PROVIDING AN ELECTRIC CURRENT DEPENDENT UPON THE INTENSITY OF SUCH TRANSMITTED RADIATION; AND (C) MEANS OPERATIVE SELECTIVELY BETWEEN: (I) A FIRST CONDITION IN WHICH SAID MEANS OPERATES TO STABILIZE THE MAGNITUDE OF SUCH ELECTRIC CURRENT BY CONTROLLING SAID RADIATION SOURCE IN DEPENDENCE THEREUPON, AND
Claim 2
Dependent Claim
88 words
A RADIATION-ABSORPTION MEASURING DEVICE COMPRISING: (A) A RADIATION SOURCE FOR SUPPLYING RADIATION AT A VARIABLE SOURCE OUTPUT POWER TO A SAMPLE OF A SUBSTANCE TO BE INVESTIGATED; (B) A RADIATION-SENSITIVE MEMBER FOR RECEIVING RADIATION TRANSMITTED THROUGH A SAMPLE FROM SAID SOURCE AND CONNECTED FOR PROVIDING AN ELECTRIC CURRENT DEPENDENT UPON THE INTENSITY OF SUCH TRANSMITTED RADIATION; AND (C) MEANS OPERATIVE SELECTIVELY BETWEEN: (I) A FIRST CONDITION IN WHICH SAID MEANS OPERATES TO STABILIZE THE MAGNITUDE OF SUCH ELECTRIC CURRENT BY CONTROLLING SAID RADIATION SOURCE IN DEPENDENCE THEREUPON, AND
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) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |