US4427881A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensor device for measuring a physical parameter
Assignee: Siemens Corp
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Filing: 1981-03-09
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Granted: 1984-01-24
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Expires: 2001-03-09
Abstract
Abstract A sensor for measuring a physical parameter at a first location which is remote from a second location. The sensor has a plurality of light transmitting fibers each having an input end for receiving light from a source and an output end for emitting the received light to a light detector and a lens for focusing light from the source on one of the input ends of the light transmitting fibers. The lens is displaced to project light to a specific one of the input ends of the fibers in accordance with the value of the physical parameter to be measured.
Inventors
- 👤 Hartwig Ruell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:55
CPC Classifications
G; G01; G01L; G01L1/00; G01L1/24; G01L1/242; G01D; G01D5/00; G01D5/26; G01D5/268; G01K; G01K1/00; G01K1/02; G01K1/024; G01K5/00; G01K5/48; G01K5/56; G01K5/62; G01K5/64; G01K5/68; G01K5/70
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
154 words
A sensor device for measuring a physical parameter, said device comprising in combination: (a) a source of light (b) a plurality of light-transmitting fibers each having an input end for receiving light and an output end for emitting the light received at said input end and conducted through said fiber; (c) a plurality of light detectors, each respectively associated with one of said output ends of said light-transmitting fibers, for receiving light therefrom and indicating the value of said physical parameter; (d) lens means for receiving light from said source and for focusing said light on one of said input ends of said light-transmitting fibers; (e) means for displacing said lens means with respect to said input ends of said light-transmitting fibers in dependence upon said physical parameter, said lens means projecting said light to a specific one of said input ends of said fibers in accordance with the value of said physical parameter.
Claim 2
Dependent Claim
154 words
A sensor device for measuring a physical parameter, said device comprising in combination: (a) a source of light (b) a plurality of light-transmitting fibers each having an input end for receiving light and an output end for emitting the light received at said input end and conducted through said fiber; (c) a plurality of light detectors, each respectively associated with one of said output ends of said light-transmitting fibers, for receiving light therefrom and indicating the value of said physical parameter; (d) lens means for receiving light from said source and for focusing said light on one of said input ends of said light-transmitting fibers; (e) means for displacing said lens means with respect to said input ends of said light-transmitting fibers in dependence upon said physical parameter, said lens means projecting said light to a specific one of said input ends of said fibers in accordance with the value of said physical parameter.
Claim 3
Dependent Claim
28 words
The sensor device according to claim 1, wherein said lens means is displaceable approximately perpendicularly with respect to the axes of said input ends of said light-transmitting fibers.
Claim 4
Dependent Claim
26 words
The sensor device according to claim 2, wherein said axes of said input ends of said secondary light-transmitting fibers are arranged in parallel to each other.
Claim 5
Dependent Claim
42 words
The sensor device according the claim 1, wherein said light source includes at least one light-transmitting fiber having an input end and an output end, and means for illuminating said input end, whereby said lens means receives light from said output end.
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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) | 1987-01-23 | 1987-07-25 | 1988-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-23 | 1991-07-25 | 1992-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-23 | 1995-07-25 | 1996-01-24 | $7700.00 | Window Closed / Lapsed |