US3319218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic beam forming system
Assignee: General Dynamics Corp
•
Filing: 1965-06-28
•
Granted: 1967-05-09
•
Expires: 1985-06-28
Abstract
No abstract record available.
Inventors
- 👤 Arthur H Zefting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:07
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/18; G10K11/26; G10K11/34; G10K11/341; G10K11/346; Y; Y10; Y10S; Y10S367/00; Y10S367/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
AN ACOUSTIC SYSTEM FOR FORMING AN ACOUSTIC BEAM COMPRISING: (A) A HYDROPHONE ARRAY INCLUDING FOUR HYDROPHONES EACH SUPPORTED AT DIFFERENT CORNERS OF AN IMAGINARY SQUARE HAVING DIAGONALS THE LENGTHS OF WHICH ARE A FRACTIONAL PART OF A GIVEN WAVELENGTH AT A GIVEN OPERATING FREQUENCY, (B) CARDIOID MEANS CONNECTED TO SAID HYDROPHONE ARRAY FOR GENERATING TWO OUTPUT SIGNALS WHICH RESPECTIVELY CORRESPOND TO TWO CARDIOID PATTERNS 180* OUT OF PHASE WITH EACH OTHER, AND (C) A THRESHOLD GATING MEANS CONNECTED TO SAID CARDIOID MEANS FOR DERIVING AN OUTPUT SIGNAL ONLY WHEN ONE OF ASID TWO OUTPUT SIGNALS IS AT A GREATER VOLTAGE LEVEL THAN THE OTHER THEREOF.
Claim 2
Dependent Claim
105 words
AN ACOUSTIC SYSTEM FOR FORMING AN ACOUSTIC BEAM COMPRISING: (A) A HYDROPHONE ARRAY INCLUDING FOUR HYDROPHONES EACH SUPPORTED AT DIFFERENT CORNERS OF AN IMAGINARY SQUARE HAVING DIAGONALS THE LENGTHS OF WHICH ARE A FRACTIONAL PART OF A GIVEN WAVELENGTH AT A GIVEN OPERATING FREQUENCY, (B) CARDIOID MEANS CONNECTED TO SAID HYDROPHONE ARRAY FOR GENERATING TWO OUTPUT SIGNALS WHICH RESPECTIVELY CORRESPOND TO TWO CARDIOID PATTERNS 180* OUT OF PHASE WITH EACH OTHER, AND (C) A THRESHOLD GATING MEANS CONNECTED TO SAID CARDIOID MEANS FOR DERIVING AN OUTPUT SIGNAL ONLY WHEN ONE OF ASID TWO OUTPUT SIGNALS IS AT A GREATER VOLTAGE LEVEL THAN THE OTHER THEREOF.
References Cited (Backward Citations)
US2987700A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-08 | 1970-11-07 | 1971-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-08 | 1974-11-07 | 1975-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-08 | 1978-11-07 | 1979-05-09 | $7700.00 | Window Closed / Lapsed |