Patent US1211380A successfully refreshed from Google Patents.
US3575641A
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Precipitation detector
Assignee: National Aeronautics and Space Administration
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Filing: 1969-02-05
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Granted: 1971-04-20
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Expires: 1989-02-05
Abstract
Abstract A precipitation detector and mechanism used to shut down a load during precipitation and activate a load upon completion of precipitation. The detector has thermistors in a bridge circuit. One of the thermistors is exposed to the elements and cooled upon being contacted with precipitation. This causes an imbalance in the bridge circuit the output of which actuates a relay that shuts down the load. Termination of precipitation allows the thermistor to warm up balancing the bridge circuit and the relay closes activating the load.
Inventors
- 👤 Harold R Long
- 👤 Martin J Menges
- 👤 Samuel W Mugler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:46
CPC Classifications
G; G01; G01W; G01W1/00; G01W1/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
45 words
A precipitation detEctor and mechanism actuator as in claim 1 wherein said pairs of first and second heat-conductive plates are substantially larger than said first and second thermistors; and insulation means positioned between said pairs of first and second heat-conductive plates and surrounding said thermistors.
References Cited (Backward Citations)
US2904995A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |