US3588795A
Expired / Lapsed
US
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Assignee: Rule Industries LLC
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Filing: 1969-02-27
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Granted: 1971-06-28
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Expires: 1989-02-27
Abstract
Abstract A SOLID-STATE INDICATOR FOR INDICATING A DEPTH OF WATER FEARUTING A DIGITAL READOUT DISPLAY WHICH IS ACCURATE, EASILY READ, AND DRAWS A MINIMUM AMOUNT OF CURRENT. THE INDICATOR INCLUDES AN AUTOMATIC GAIN THAT IS AUTOMATICALLY STEPPED UPWARDLY TOGETHER WITH A NEWLY TRANSMITTED SOUND WAVE WHEN A PREVIOUS SOUND WAVE HAS STILL NOT BEEN RECEIVED. ALSO PROVIDED IS AN AUTOMATIC ALARM THAT IS SIMPLY ACTUATED BY CONNECTING THE ALARM TO THE DIGITAL OUTPUTS OF THE COUNTERS. THE ALARM IS SET AT A PARTICULAR DEPTH AND IS SOUNDED WHENEVER THE COUNTERS ARE STOPPED BY A REFLECTED SOUND WAVE AT A DEPTH OF WATER BELOW THIS SETTING.
Inventors
- 👤 Stathis G Linardos
- 👤 Richard F Elmhurst
- 👤 William A Elmhurst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:24
CPC Classifications
G; G01; G01S; G01S15/00; G01S15/02; G01S15/06; G01S15/08; G01S15/10; G01S15/14; G01S7/00; G01S7/52; G01S7/523; G01S7/526; G01S7/529
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |