US3224676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic sprinkler control
Assignee: Individual
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Filing: 1963-11-08
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Granted: 1965-12-21
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Expires: 1983-11-08
Abstract
No abstract record available.
Inventors
- 👤 George P Rauchwerger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:29
CPC Classifications
G; G05; G05D; G05D22/00; G05D22/02; A; A01; A01G; A01G25/00; A01G25/16; A01G25/167; Y; Y10; Y10T; Y10T137/00; Y10T137/1842; Y10T137/1866; Y10T137/1939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN A SPRINKLER SYSTEM, A CONDUIT, A VALVE IN SAID CONDUIT, A SOLENOID OPENING AND CLOSING SAID VALVE, A SOURCE OF CURRENT, A RELAY CONTROLLING ENERGIZATION OF SAID SOLENOID TO SAID CURRENT AND HAVING A COIL, AND A CIRCUIT INCLUDING SAID COIL ENERGIZING BY SAID CURRENT AND COMPRISING A PHOTOCELL ARRANGED TO INTERRUPT SAID CIRCUIT IN DAYLIGHT, A PROBE IN SAD CIRCUIT HAVING TWO ELECTRODES AND HYGROSCOPIC MATERIAL BETWEEN SAID ELECTRODES IN CONTACT WITH SOIL IRRIGATED BY SAID SYSTEM CHARACTERIZED BY A CHANGE IN RESISTANCE OF SAID MATERIAL WHEN SAID SOIL IS WET, SAID PROBE ARRANGED TO OPEN SAID CIRCUIT WHEN SAID SOIL IS WET.
Claim 2
Dependent Claim
105 words
IN A SPRINKLER SYSTEM, A CONDUIT, A VALVE IN SAID CONDUIT, A SOLENOID OPENING AND CLOSING SAID VALVE, A SOURCE OF CURRENT, A RELAY CONTROLLING ENERGIZATION OF SAID SOLENOID TO SAID CURRENT AND HAVING A COIL, AND A CIRCUIT INCLUDING SAID COIL ENERGIZING BY SAID CURRENT AND COMPRISING A PHOTOCELL ARRANGED TO INTERRUPT SAID CIRCUIT IN DAYLIGHT, A PROBE IN SAD CIRCUIT HAVING TWO ELECTRODES AND HYGROSCOPIC MATERIAL BETWEEN SAID ELECTRODES IN CONTACT WITH SOIL IRRIGATED BY SAID SYSTEM CHARACTERIZED BY A CHANGE IN RESISTANCE OF SAID MATERIAL WHEN SAID SOIL IS WET, SAID PROBE ARRANGED TO OPEN SAID CIRCUIT WHEN SAID SOIL IS WET.
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) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |