US3692415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photometric analyzer employing fiber optic light transmitting means
Assignee: Combustion Engineering Inc
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Filing: 1971-03-22
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Granted: 1972-09-19
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Expires: 1991-03-22
Abstract
Abstract Photometric analyzer having a reaction chamber for exciting samples by thermal, chemical or other energy to emit characteristic light, the reaction chamber usually being operated at elevated temperature. A photometric light sensor is located remotely from the chamber away from the influence of heat therefrom. Characteristic light is transmitted from the chamber to the photometric light sensor by a fiber optic bundle.
Inventors
- 👤 John W Shiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:21
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/62; G01N21/71; G01N21/72
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
126 words
Analytical apparatus of the photometric type comprising a reaction chamber having means for exciting a sample to be analyzed to cause emission of light characteristic of a particular composition of said sample, means responsive to light to produce a signal indicative of the intensity of said light, said light responsive means being located remotely from said reaction chamber so as to be substantially removed from the influence of heat from said chamber, and flexible fiber optic means for transmitting light from said chamber and for substantially blocking the transmission of heat therefrom, said fiber optic means having an entrance end exposed to receive light from said chamber and an exit end positioned to direct light transmitted by said fiber optic means upon said light responsive means.
Claim 2
Dependent Claim
126 words
Analytical apparatus of the photometric type comprising a reaction chamber having means for exciting a sample to be analyzed to cause emission of light characteristic of a particular composition of said sample, means responsive to light to produce a signal indicative of the intensity of said light, said light responsive means being located remotely from said reaction chamber so as to be substantially removed from the influence of heat from said chamber, and flexible fiber optic means for transmitting light from said chamber and for substantially blocking the transmission of heat therefrom, said fiber optic means having an entrance end exposed to receive light from said chamber and an exit end positioned to direct light transmitted by said fiber optic means upon said light responsive means.
Claim 3
Dependent Claim
21 words
Apparatus as claimed in claim 1 wherein said reaction chamber and said light responsive means are maintained at substantially different temperatures.
Claim 4
Dependent Claim
53 words
Apparatus as claimed in claim 1 with additionally a light filter interposed in the path of light transmitted by said fiber optic means, said filter passing a spectral band of interest and rejecting other light whereby said light responsive means is exposed only to light characteristic of a particular composition of said sample.
Claim 5
Dependent Claim
67 words
Apparatus as claimed in claim 1 wherein said fiber optic means possesses a limited acceptance angle at said entrance end and wherein said entrance end of said fiber optic means is oriented with respect to said reaction chamber to accept and transmit only light emanating from a particular zone within said chamber and to reject light emanating from zones in said chamber other than said particular zone.
References Cited (Backward Citations)
US3374950A
Cited
US3489498A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |