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US3775816A
Expired / Lapsed
US
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Method of making a molded piezoelectric transducer assembly
Assignee: United States Atomic Energy Commission
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Filing: 1972-07-27
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Granted: 1973-12-04
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Expires: 1992-07-27
Abstract
Abstract A piezoelectric transducer assembly consisting of a molded inner body securing a piezoelectric crystal, one electrical conductor and the electrical connection therebetween. The surface of the body is plated with a conductive film to provide an electrical connection between the exposed face of the crystal and a second electrical conductor. A molded housing is disposed about the inner body to protect the conductive surface and provide the final configuration for the assembly. Also disclosed is a method for making the described transducer assembly.
Inventors
- 👤 N Gordon
- 👤 H Pedersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:13
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0644; B06B1/0662; B06B1/0681; Y; Y10; Y10T; Y10T29/00; Y10T29/42
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
164 words
A method of making a piezoelectric transducer assembly from a piezoelectric crystal having inner and outer opposite faces and from a cable having first and second conductors comprising: a. connecting electrically the first conductor of said cable to the inner face of said crystal; b. molding an inner body about said crystal and said first conductor, while permitting the outer face of said crystal to remain exposed in the surface of said inner body, thus forming a transducer unit; c. plating a metal coating on said transducer unit and the outer face of said crystal, thus providing an electrically conductive surface; d. connecting electrically the second conductor of the cable with the metal coating thus providing an electrical connection between the outer face of the crystal and the second conductor; and e. molding a housing about the metal coating on the inner body, while permitting the second side of the crystal to remain exposed, thus protecting the metal coating and forming the transducer assembly.
Claim 2
Independent Claim
164 words
A method of making a piezoelectric transducer assembly from a piezoelectric crystal having inner and outer opposite faces and from a cable having first and second conductors comprising: a. connecting electrically the first conductor of said cable to the inner face of said crystal; b. molding an inner body about said crystal and said first conductor, while permitting the outer face of said crystal to remain exposed in the surface of said inner body, thus forming a transducer unit; c. plating a metal coating on said transducer unit and the outer face of said crystal, thus providing an electrically conductive surface; d. connecting electrically the second conductor of the cable with the metal coating thus providing an electrical connection between the outer face of the crystal and the second conductor; and e. molding a housing about the metal coating on the inner body, while permitting the second side of the crystal to remain exposed, thus protecting the metal coating and forming the transducer assembly.
Claim 3
Dependent Claim
27 words
The method of claim 1 wherein the transducer unit is etched by contacting the unit with a solution of concentrated NaOH before plating the metal coating thereon.
Claim 4
Dependent Claim
17 words
The method of claim 2 wherein the etched transducer unit is plated with a coating of copper.
Claim 5
Dependent Claim
18 words
The method of claim 3 wherein the copper-plated transducer unit is also plated with a coating of nickel.
References Cited (Backward Citations)
US2636134A
Cited
US3427481A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |