US3569710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for improving the signal-to-noise ratio of the wheatstone bridge type bolometer
Assignee: National Aeronautics and Space Administration
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Filing: 1968-10-01
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Granted: 1971-03-09
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Expires: 1988-10-01
Abstract
Abstract An improvement in the signal-to-noise ratio of a Wheatstone bridge type radiation measuring instrument. The improvement consists of replacing the shielded element in the bridge by an identical element except that it is K times as large and has K times as much resistance and replacing the voltage source adjacent to the replaced element by a power source producing K times as many volts where K is greater than one.
Inventors
- 👤 Antony Jalink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:17
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/10; G01J5/20; G01J5/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
A method for improving the signal-to-noise ratio of an instrument for measuring radiation of the type in which a first piece of material that changes in resistance when it is exposed to radiation, a second piece of material exactly like said first piece, a first battery, and a second battery that produces the same number of volts as said first battery are connected as a Wheatstone bridge whereby when said first piece of material is exposed to the radiation to be measured and the second piece is shielded from the radiation the output of the bridge is proportional to the radiation said method comprising the steps of replacing said second piece of material with an identical piece of material except that its resistance is K times as large and replacing said second battery with a battery that produces K times as many volts where K is greater than one.
Claim 2
Independent Claim
149 words
A method for improving the signal-to-noise ratio of an instrument for measuring radiation of the type in which a first piece of material that changes in resistance when it is exposed to radiation, a second piece of material exactly like said first piece, a first battery, and a second battery that produces the same number of volts as said first battery are connected as a Wheatstone bridge whereby when said first piece of material is exposed to the radiation to be measured and the second piece is shielded from the radiation the output of the bridge is proportional to the radiation said method comprising the steps of replacing said second piece of material with an identical piece of material except that its resistance is K times as large and replacing said second battery with a battery that produces K times as many volts where K is greater than one.
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) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |