US3967234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Depth-of-field arc-transducer and sonar system
Assignee: Westinghouse Electric Corp
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Filing: 1974-03-06
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Granted: 1976-06-29
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Expires: 1994-03-06
Abstract
Abstract A large depth-of-field arc-transducer for use in sonar systems is provided in which at least one transducer element is positioned to lie along the arc of a circle of radius R. The active faces of the transducer elements are directed to a point that lies on a line normal to the plane of the arc and passes through the center thereof. The radius R is equal to between 0.3 to 0.6 Rs and, preferably about 0.5 Rs, where Rs is the distance from said point to the midpoint of the arc-transducer. An improved depth-of-field sonar system is provided where at least two arc-transducers are used having different radii, and preferably, where each radius R is equal to between 0.3 to 0.6 Rs.
Inventors
- 👤 Charles H. Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:49
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/18; G10K11/26; G10K11/32
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
101 words
A large depth-of-field transducer for use in sonar systems, said transducer comprising at least one transducer element positioned along an arc of a circle having a radius R and having an arc length L, said transducer element having an active face along its length including a midpoint, said face being directed toward a point lying on a line normal to the plane defined by the arc and passing through the center of said arc, said point being spaced from said midpoint by a distance R s , and said radius R being equal to about 0.3 to 0.6 R s .
Claim 2
Dependent Claim
101 words
A large depth-of-field transducer for use in sonar systems, said transducer comprising at least one transducer element positioned along an arc of a circle having a radius R and having an arc length L, said transducer element having an active face along its length including a midpoint, said face being directed toward a point lying on a line normal to the plane defined by the arc and passing through the center of said arc, said point being spaced from said midpoint by a distance R s , and said radius R being equal to about 0.3 to 0.6 R s .
Claim 3
Dependent Claim
16 words
A transducer as set forth in claim 1 wherein R is about 0.5 R s .
Claim 4
Dependent Claim
24 words
A transducer as set forth in claim 1 wherein said transducer element comprises a plurality of individual elements adapted to be driven in phase.
Claim 5
Dependent Claim
41 words
A transducer as set forth in claim 3 for transmitting signals in sonar systems including means for feeding signals of equal phase to each of said elements, said signals having a progressively reduced amplitude from said center to said end elements.
Claim 6
Dependent Claim
56 words
An arc-transducer as set forth in claim 1 having a symmetrical shading function wherein the maximum power output of said element is from said midpoint to a distance of about 10 percent of its length on either side of said midpoint to minimum output of about 25 percent of said maximum at each of its ends.
Claim 7
Dependent Claim
34 words
A sonar system having at least two transducers as set forth in claim 1 wherein each of said transducers have transducer elements lying on the arc of a circle of a different radius R.
Claim 8
Dependent Claim
111 words
A large depth-of-field sonar transducer system, said system comprising at least two transducers, each of said transducers having at least one transducer element positioned along an arc of circle having a different radius R, said transducer element of each transducer having an active face along its length including a mid-point, each transducer face being directed to a point lying on a line normal to the plane defined by respective arc and passing through the center of its respective arc, said arcs lying in the same plane, and the radius R of each transducer is equal to between 0.3 to 0.6 R s where R s is equal to the slant range.
Claim 9
Dependent Claim
111 words
A large depth-of-field sonar transducer system, said system comprising at least two transducers, each of said transducers having at least one transducer element positioned along an arc of circle having a different radius R, said transducer element of each transducer having an active face along its length including a mid-point, each transducer face being directed to a point lying on a line normal to the plane defined by respective arc and passing through the center of its respective arc, said arcs lying in the same plane, and the radius R of each transducer is equal to between 0.3 to 0.6 R s where R s is equal to the slant range.
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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) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |