US3723915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic surface wave device
Assignee: Zenith Electronics LLC
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Filing: 1971-05-10
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Granted: 1973-03-27
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Expires: 1991-05-10
Abstract
Abstract A variable transmission apparatus for translating signals between a source and a load comprises a substrate propagative of acoustic surface waves. An input transducer coupled to a surface of the substrate and responsive to applied signals serves to launch acoustic waves. An output transducer is coupled to a portion of the surface spaced from the input transducer and, in response to the launched waves, derives output signals having a delay, relative to the input signals, that corresponds to the spacing between the transducers. Means are included for flexing the substrate to alter the surface wave phase velocity.
Inventors
- 👤 R Adler
- 👤 Vries A De
- 👤 F Dias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:09
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/46; H03H9/64; H03H9/6423; H03H9/6433; H03H9/6436; H03B; H03B5/00; H03B5/30; H03B5/32; H03B5/326; H03D; H03D3/00; H03D3/02; H03D3/06; H03D3/16; H03D3/34; H03H9/02; H03H9/02535; H03H9/0296; H03H9/70; H03H9/72; H03K; H03K3/00; H03K3/02; H03K3/04; H03K3/16; H04; H04N; H04N9/00; H04N9/64; H04N9/647; H04N9/77; H04N9/78
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
In a wave signal apparatus for translating signals between a source and a load, variable transmission apparatus compRising: a substrate propagative of acoustic surface waves; an input transducer coupled to a surface of said substrate and responsive to applied signals for launching acoustic surface waves on said surface; means for applying signals to said input transducer; an output transducer coupled to a portion of said surface spaced from said input transducer and responsive to said waves for deriving, for application to a load, output signals having a delay relative to said input signals corresponding to the spacing between said transducers; and means for flexing said substrate to alter the surface-wave phase velocity, thereof.
Claim 2
Dependent Claim
113 words
In a wave signal apparatus for translating signals between a source and a load, variable transmission apparatus compRising: a substrate propagative of acoustic surface waves; an input transducer coupled to a surface of said substrate and responsive to applied signals for launching acoustic surface waves on said surface; means for applying signals to said input transducer; an output transducer coupled to a portion of said surface spaced from said input transducer and responsive to said waves for deriving, for application to a load, output signals having a delay relative to said input signals corresponding to the spacing between said transducers; and means for flexing said substrate to alter the surface-wave phase velocity, thereof.
References Cited (Backward Citations)
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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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |