US3573845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improved acoustic image reproduction system using a piezoelectric printer and electrogasdynamics
Assignee: Energy Innovations Inc
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Filing: 1969-02-27
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Granted: 1971-04-06
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Expires: 1989-02-27
Abstract
Abstract An apparatus and method for printing an image of a pattern of sound waves on a dielectric sheet, such as paper or the like, comprising the use of a space charge cloud of ionized ink from an electrogasdynamic generator to develop an electrostatic charge image of the sound pattern which has been formed on the dielectric sheet using an acoustic image converter plate. By virtue of the high charge on the ink, a high quality image is developed on the sheet even though the sound wave patterns resulting from ultrasonic scanning of a test object or from the energizing of an acoustical transducer may be comparatively weak.
Inventors
- 👤 Meredith C Gourdine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:25
CPC Classifications
G; G01; G01H; G01H3/00; G01H3/10; G01H3/12; G01H3/125
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
17 words
Apparatus as claimed in claim 1 wherein said piezoelectric meAns comprises a member of piezoresistive semiconductor material.
Claim 2
Dependent Claim
14 words
Apparatus as claimed in claim 1 wherein said piezoelectric means comprises a quartz plate.
Claim 3
Dependent Claim
48 words
Apparatus as claimed in claim 1 comprising: e. electroluminescent means for producing light patterns in response to the patterns produced by said piezoelectric means; and f. xerographic means for producing patterns of electrically conductive areas on its surface in response to light patterns produced by said electroluminescent means.
Claim 4
Dependent Claim
42 words
Apparatus as claimed in claim 1 wherein said piezoelectric means comprises a plate having one surface in contact with a sound conducting medium and its other surface producing electrically conductive areas thereon in response to sound patterns impinging on said one surface.
Claim 5
Dependent Claim
16 words
Apparatus as claimed in claim 5 wherein said sound conducting medium is contained in an enclosure.
Claim 6
Independent Claim
83 words
A method of printing, comprising the steps of: a. depositing a uniform layer of charge on the surface of a dielectric sheet; b. bringing the charge layer in contact with the face of a piezoelectric member having a voltage pattern thereon resulting from the impressing of a pressure pattern on its opposite face thereby producing a latent electrostatic image of the pattern on the dielectric sheet; and c. developing the latent electrostatic image by means of an electrogasdynamically produced cloud of ionized particles.
Claim 7
Dependent Claim
14 words
The method as claimed in claim 7 wherein the pressure patterns are sound waves.
Claim 8
Dependent Claim
18 words
The method as claimed in claim 7 wherein the piezoelectric member is composed of a piezoresistive semiconductor material.
Claim 9
Dependent Claim
22 words
The method as claimed in claim 7 wherein the pressure pattern receiving face of said piezoelectric member is contained in an enclosure.
References Cited (Backward Citations)
US2753796A
Cited
US3121873A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |