Patent US3249913A successfully refreshed from Google Patents.
US3249913A
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Ultrasonic underwater sound generator
Assignee: National Research Council Canada
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Filing: 1963-05-08
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Granted: 1966-05-03
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Expires: 1983-05-08
Abstract
No abstract record available.
Inventors
- 👤 Henry L R Smyth
- 👤 David M Makow
- 👤 Stanley K Keays
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:53
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/004; G10K11/006; G01; G01S; G01S1/00; G01S1/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
AN ULTRASONIC UNDERWATER SOUND GENERATOR COMPRISING: (A) A CAUSING HAVING AT LEAST ONE OPENING FOR THE ENTRANCE OF WATER, (B) A WATER TIGHT CONTAINER SHOCK MOUNTED IN SAID CASING TO DEFINE AN ANNULAR SPACE BETWEEN SAID CONTAINER AND THE INNER SURFACE OF SAID CASING, (C) A CYLINDRICAL ULTRASONIC TRANSDUCER ENCIRCLING SAID CONTAINER AND MOUNTED IN SAID ANNULAR SPACE BY SHOCK ABSORBENT MEANS SUCH THAT THE TRANSDUCER IS FREE TO GENERATE ULTRASONIC SIGNALS WHEN IMMERSED AND EXCITED, (D) A TRANSISTORIZED OSCILLATOR CIRCUIT WITH SELF-CONTAINED POWER SUPPLY RIGIDLY MOUNTED IN SAID CONTAINER, (E) CONNECTINS FROM THE OUTPUT OF THE SAID OSCILLATOR CIRCUIT TO THE SAID TRANSDUCER, (F) SWITCH MEANS CONNECTED TO SAID OSCILLATOR CIRCUIT SUCH THAT WHEN THE SOUND GENERATOR IS IN AIR THE OSCILLATOR IS INOPERATIVE AND WHEN THE SECOND GENERATOR IS SUBMERGED IN WATER THE OSCILLATOR IS OPERATIVE.
Claim 2
Dependent Claim
138 words
AN ULTRASONIC UNDERWATER SOUND GENERATOR COMPRISING: (A) A CAUSING HAVING AT LEAST ONE OPENING FOR THE ENTRANCE OF WATER, (B) A WATER TIGHT CONTAINER SHOCK MOUNTED IN SAID CASING TO DEFINE AN ANNULAR SPACE BETWEEN SAID CONTAINER AND THE INNER SURFACE OF SAID CASING, (C) A CYLINDRICAL ULTRASONIC TRANSDUCER ENCIRCLING SAID CONTAINER AND MOUNTED IN SAID ANNULAR SPACE BY SHOCK ABSORBENT MEANS SUCH THAT THE TRANSDUCER IS FREE TO GENERATE ULTRASONIC SIGNALS WHEN IMMERSED AND EXCITED, (D) A TRANSISTORIZED OSCILLATOR CIRCUIT WITH SELF-CONTAINED POWER SUPPLY RIGIDLY MOUNTED IN SAID CONTAINER, (E) CONNECTINS FROM THE OUTPUT OF THE SAID OSCILLATOR CIRCUIT TO THE SAID TRANSDUCER, (F) SWITCH MEANS CONNECTED TO SAID OSCILLATOR CIRCUIT SUCH THAT WHEN THE SOUND GENERATOR IS IN AIR THE OSCILLATOR IS INOPERATIVE AND WHEN THE SECOND GENERATOR IS SUBMERGED IN WATER THE OSCILLATOR IS OPERATIVE.
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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |