US3587005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transducer array for elastic wave transmission
Assignee: AT&T Inc
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Filing: 1968-01-03
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Granted: 1971-06-22
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Expires: 1988-01-03
Abstract
Abstract This application describes an improved transducer array for elastic wave transmission having reduced capacitance and reduced noise. In accordance with the invention, the ground and grating electrodes coextend on opposite sides of the transducer body only over the region coincident with the grating array. In addition, one or both electrodes are adapted to extend around the transducer body in a manner to shield it. By this means, the electrode capacitance and the generation of spurious, nondispersive signals are minimized. The improved structure also permits bonding of both contacts to their respective electrodes thereby producing a more reliable connection to the transducer.
Inventors
- 👤 Irvin E Fair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:08
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/30; H03H9/40
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
117 words
A transducer array for elastic wave transmission comprising: a body of transducer material having upper and lower parallel surfaces; a first electrode comprising an upper portion including a grating array disposed upon the upper surface of said transducer body, an edge portion extending over an edge of said body, and a lower portion extending over a portion of the lower surface of said transducer body; and a second electrode comprising a lower portion extending over a portion of the lower surface of said transducer body which coextends with the upper portion of said first electrode across said transducer body only in said grating region and which extends to cover substantially the remaining portion of said transducer body.
Claim 2
Dependent Claim
117 words
A transducer array for elastic wave transmission comprising: a body of transducer material having upper and lower parallel surfaces; a first electrode comprising an upper portion including a grating array disposed upon the upper surface of said transducer body, an edge portion extending over an edge of said body, and a lower portion extending over a portion of the lower surface of said transducer body; and a second electrode comprising a lower portion extending over a portion of the lower surface of said transducer body which coextends with the upper portion of said first electrode across said transducer body only in said grating region and which extends to cover substantially the remaining portion of said transducer body.
Claim 3
Dependent Claim
44 words
An elastic wave delay cell comprising a delay medium in combination with a transducer array according to claim 2 wherein the lower portion of said first electrode extends beyond the edges of said transducer body and contacts the delay medium of said delay cell.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |