US3215977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic transducer
Assignee: Clevite Corp
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Filing: 1960-07-27
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Granted: 1965-11-02
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Expires: 1980-07-27
Abstract
No abstract record available.
Inventors
- 👤 Alfred L W Williams
- 👤 Halley H Hamlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:10
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0644; B06B1/0655; H; H04; H04R; H04R17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
223 words
AN ACOUSTIC TRANSDUCER COMPRISING, IN COMBINATION, FIRST AND SECOND SUBSTANTIALLY DISH-SHAPED HOSING SECTIONS EACH OF GIVEN THICKNESS AND FORMED OF MATERIAL SUCH THAT WHEN IT IS EXCITED AT ACOUSTIC FREQUENCIES IN THE RANGE UP TO AT LEAST 15,000 CYCLES PER SECOND EACH HOUSING SECTION MOVES AS A PISTON, TUBULAR PIEZOELECTRIC CERAMIC ELEMENT MEANS OF THE EXPANDER TYPE LOCATED BETWEEN AND IN DRIVING ENGAGEMENT WITH BOTH OF SAID DISH-SHAPED HOUSING SECTIONS FOR TRANSDUCING MOTION IN A DIRECTION PARALLEL TO THE AXIS OF SAID HOUSING SECTIONS, FASTENER MEANS EXTENDING THROUGH SAID TUBULAR ELEMENT MEANS RIGIDILY FASTENING SAID TWO HOUSING SECTIONS TOGETHER FACETO-FACE DEFINING A CAVITY CONTAINING SAID PIEZOELECTRIC ELEMENT MEANS AND WITH SAID PIEZOELECTRIC ELEMENT MEANS LIMITING THE MOTION OF SAID HOUSING SECTIONS TOWARD EACH OTHER WHEREBY THERE IS APPLIED TO SAID PIEZOELECTRIC ELEMENT MEANS A COMPRESSIVE BIAS, THE LENGTH OF SAID PIEZOELECTRIC ELEMENT MEANS IN THE DIRECTION OF ITS EXPANSION AND CONTRACTION BEING RELATED TO THE DEPTH OF THE DISHSHAPED HOUSING SECTIONS TO ESTABLISH CLEARANCE BETWEEN THE PERIPHERAL EDGES OF THE TWO HOUSING SECTIONS WHEREBY DURING THE PISTON MOTION OF THE TWO SECTIONS THEY ARE FREE OF ENGAGEMENT WITH EACH OTHER, THE STIFFNESS OF SAID FASTENER MEANS IN TENSION BEING LOW COMPARED TO THE STIFFNESS OF SAID PIEZOELECTRIC ELEMENT MEANS, AND COMPLAINT SEALING MEANS SEALING AROUND THE PERIPHERAL EDGES OF SAID TWO HOUSING SECTIONS.
Claim 2
Dependent Claim
223 words
AN ACOUSTIC TRANSDUCER COMPRISING, IN COMBINATION, FIRST AND SECOND SUBSTANTIALLY DISH-SHAPED HOSING SECTIONS EACH OF GIVEN THICKNESS AND FORMED OF MATERIAL SUCH THAT WHEN IT IS EXCITED AT ACOUSTIC FREQUENCIES IN THE RANGE UP TO AT LEAST 15,000 CYCLES PER SECOND EACH HOUSING SECTION MOVES AS A PISTON, TUBULAR PIEZOELECTRIC CERAMIC ELEMENT MEANS OF THE EXPANDER TYPE LOCATED BETWEEN AND IN DRIVING ENGAGEMENT WITH BOTH OF SAID DISH-SHAPED HOUSING SECTIONS FOR TRANSDUCING MOTION IN A DIRECTION PARALLEL TO THE AXIS OF SAID HOUSING SECTIONS, FASTENER MEANS EXTENDING THROUGH SAID TUBULAR ELEMENT MEANS RIGIDILY FASTENING SAID TWO HOUSING SECTIONS TOGETHER FACETO-FACE DEFINING A CAVITY CONTAINING SAID PIEZOELECTRIC ELEMENT MEANS AND WITH SAID PIEZOELECTRIC ELEMENT MEANS LIMITING THE MOTION OF SAID HOUSING SECTIONS TOWARD EACH OTHER WHEREBY THERE IS APPLIED TO SAID PIEZOELECTRIC ELEMENT MEANS A COMPRESSIVE BIAS, THE LENGTH OF SAID PIEZOELECTRIC ELEMENT MEANS IN THE DIRECTION OF ITS EXPANSION AND CONTRACTION BEING RELATED TO THE DEPTH OF THE DISHSHAPED HOUSING SECTIONS TO ESTABLISH CLEARANCE BETWEEN THE PERIPHERAL EDGES OF THE TWO HOUSING SECTIONS WHEREBY DURING THE PISTON MOTION OF THE TWO SECTIONS THEY ARE FREE OF ENGAGEMENT WITH EACH OTHER, THE STIFFNESS OF SAID FASTENER MEANS IN TENSION BEING LOW COMPARED TO THE STIFFNESS OF SAID PIEZOELECTRIC ELEMENT MEANS, AND COMPLAINT SEALING MEANS SEALING AROUND THE PERIPHERAL EDGES OF SAID TWO HOUSING SECTIONS.
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) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |