Patent US3169508A successfully refreshed from Google Patents.
US3169508A
Expired / Lapsed
US
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Elastic wave generator
Assignee: Northern Industries Inc
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Filing: 1963-01-16
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Granted: 1965-02-16
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Expires: 1983-01-16
Abstract
No abstract record available.
Inventors
- 👤 Stanley R Rich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:48
CPC Classifications
G; G10; G10K; G10K5/00; G10K5/02; Y; Y10; Y10S; Y10S116/00; Y10S116/18; Y10S116/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN APPARATUS FOR GENERATING ELASTIC WAVES IN A GASEOUS MEDIUM WITH AN ACOUSTIC RESONATOR CAVITY, AN OPENING AT ONE END OF SAID CAVITY AND MEANS TO PROPEL A STREAM OF GAS AT SAID OPENING FOR GENERATING SAID WAVES, THE IMPROVEMENT COMPRISING, A CONICALLY SHAPED WALL MEANS IN SAID CAVITY OPPOSITE SAID OPENING, SAID WALL MEANS PROVIDING A VENT COLUMN OF GENERALLY UNIFORM CROSS-SECTION SMALLER THAN THE CROSS-SECTION OF SAID CAVITY AND EXTENDING AWAY FROM THE WALL MEANS IN SAID CAVITY OPPOSIRE SAID OPENING FOR DRAINING LIQUID FROM SAID RESONATOR, SAID CROSS-SECTION OF SAID VENT COLUMN BEING SO SMALL THAT SAID VENT COLUMN FUNCTIONS AS AN ACOUSTIC INDUCTANCE, WITH RESPECT TO SAID WAVES, OF WHICH THE REACTANCE JWM IS LARGE COMPARED WITH THE ACOUSTIC IMPEDANCE OF SAID RESONATOR CAVITY, WHERE "W"=2$F; "F"=THE FREQUENCY OF SAID WAVES; AND "M"=MASS OF GAS IN SAID VENT COLUMN.
Claim 2
Dependent Claim
143 words
IN APPARATUS FOR GENERATING ELASTIC WAVES IN A GASEOUS MEDIUM WITH AN ACOUSTIC RESONATOR CAVITY, AN OPENING AT ONE END OF SAID CAVITY AND MEANS TO PROPEL A STREAM OF GAS AT SAID OPENING FOR GENERATING SAID WAVES, THE IMPROVEMENT COMPRISING, A CONICALLY SHAPED WALL MEANS IN SAID CAVITY OPPOSITE SAID OPENING, SAID WALL MEANS PROVIDING A VENT COLUMN OF GENERALLY UNIFORM CROSS-SECTION SMALLER THAN THE CROSS-SECTION OF SAID CAVITY AND EXTENDING AWAY FROM THE WALL MEANS IN SAID CAVITY OPPOSIRE SAID OPENING FOR DRAINING LIQUID FROM SAID RESONATOR, SAID CROSS-SECTION OF SAID VENT COLUMN BEING SO SMALL THAT SAID VENT COLUMN FUNCTIONS AS AN ACOUSTIC INDUCTANCE, WITH RESPECT TO SAID WAVES, OF WHICH THE REACTANCE JWM IS LARGE COMPARED WITH THE ACOUSTIC IMPEDANCE OF SAID RESONATOR CAVITY, WHERE "W"=2$F; "F"=THE FREQUENCY OF SAID WAVES; AND "M"=MASS OF GAS IN SAID VENT COLUMN.
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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) | 1968-02-16 | 1968-08-17 | 1969-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-16 | 1972-08-17 | 1973-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-16 | 1976-08-17 | 1977-02-16 | $7700.00 | Window Closed / Lapsed |