US3673474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for generating (a source of) surface and bulk elastic wares
Assignee: United States Department of the Navy
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Filing: 1970-09-25
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Granted: 1972-06-27
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Expires: 1990-09-25
Abstract
Abstract A source of high frequency elastic waves are generated by placing a Gunn effect oscillator in close proximity to a piezoelectric or an electrostrictive solid. The device creates a moving source of sound near the surface of the solid. The sound will be radiated from the surface of the solid as bulk or surface elastic waves. Elastic waves can be generated from both surfaces in certain situations.
Inventors
- 👤 Richard M White
- 👤 Robert E Lee
- 👤 Charles W Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:14
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/125; H03H9/145; H03H9/14502; B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0644; G; G10; G10K; G10K15/00; G10K15/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
132 words
A means for generating elastic waves in an electrostrictive solid comprising in combination: a. an electrostrictive solid having a polished surface; b. a uniformly shaped oscillating means comprising a bias means and a pair of ohmic contacts; c. said oscillating means positioned adjacent said polished solid; d. said oscillating means having a cross sectional shape uniform in the direction normal to said ohmic contacts to form an interface between said oscillating means and said polished surface; e. said oscillating means having said ohmic contacts perpendicular to said polished surface of said electrostrictive solid; f. a voltage source operatively connected to said oscillating means to apply a voltage to drive said oscillating means in one direction wherein said oscillating means generates elastic waves in said polished solid when said voltage source is actuated.
Claim 2
Dependent Claim
132 words
A means for generating elastic waves in an electrostrictive solid comprising in combination: a. an electrostrictive solid having a polished surface; b. a uniformly shaped oscillating means comprising a bias means and a pair of ohmic contacts; c. said oscillating means positioned adjacent said polished solid; d. said oscillating means having a cross sectional shape uniform in the direction normal to said ohmic contacts to form an interface between said oscillating means and said polished surface; e. said oscillating means having said ohmic contacts perpendicular to said polished surface of said electrostrictive solid; f. a voltage source operatively connected to said oscillating means to apply a voltage to drive said oscillating means in one direction wherein said oscillating means generates elastic waves in said polished solid when said voltage source is actuated.
Claim 3
Dependent Claim
15 words
The apparatus recited in claim 1 wherein the oscillating means is a Gunn effect diode.
Claim 4
Dependent Claim
14 words
The apparatus recited in claim 1 wherein the oscillating means is a piezoelectric solid.
Claim 5
Dependent Claim
22 words
The apparatus recited in claim 1 where the amplitude of said bias is changed by varying the voltage of said voltage source.
Claim 6
Dependent Claim
15 words
The apparatus recited in claim 2 wherein the polarity of said bias means is changed.
Claim 7
Dependent Claim
38 words
The apparatus recited in claim 1 wherein the cross sectional shape of said diode is not uniform to said ohmic contacts wherein the amplitude of said bias means is varied by varying the voltage of said voltage source.
Claim 8
Dependent Claim
31 words
Apparatus recited in claim 1 wherein said electrostrictive solid having a polished surface is positioned adjacent said oscillating means to form an interface surface between said solid and said oscillating means.
Claim 9
Dependent Claim
34 words
Apparatus recited in claim 7 wherein the said interface surface of said oscillating means is serrated to form raised areas and relieved areas so that said raised areas are in contact with said solid.
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |