US3778758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transducer
Assignee: United States Department of the Navy
•
Filing: 1972-09-25
•
Granted: 1973-12-11
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Expires: 1992-09-25
Abstract
Abstract A high energy level acoustic transducer employs a reentrant tail mass structure. Dimensions and placement of the reentrant portion of the tail piece eliminate lateral or rocking vibration modes of the transducer in the operative bandpass.
Inventors
- 👤 D Carson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:13
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0644; B06B1/0655; B06B1/0607; B06B1/0611; B06B1/0618; G; G10; G10K; G10K11/00; G10K11/02; G10K11/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
106 words
An electroacoustic transducer comprising: a resonant piezoelectric cylinder; a head mass in contact with the resonant piezoelectric cylinder and configured to transfer acoustic energy therefrom to a suitable acoustic load; an external tail mass in contact with the resonant piezoelectric cylinder; biasing means joining the head mass and the external tail mass for holding the head mass, external tail mass, and resonant piezoelecTric cylinder in a unitary assembly, and; means effectively joined to the external tail mass and reentrantly extending within the center of the resonant piezoelectric cylinder concentric with and spaced from said biasing means for controlling lateral and rocking resonances of the unitary assembly.
Claim 2
Dependent Claim
106 words
An electroacoustic transducer comprising: a resonant piezoelectric cylinder; a head mass in contact with the resonant piezoelectric cylinder and configured to transfer acoustic energy therefrom to a suitable acoustic load; an external tail mass in contact with the resonant piezoelectric cylinder; biasing means joining the head mass and the external tail mass for holding the head mass, external tail mass, and resonant piezoelecTric cylinder in a unitary assembly, and; means effectively joined to the external tail mass and reentrantly extending within the center of the resonant piezoelectric cylinder concentric with and spaced from said biasing means for controlling lateral and rocking resonances of the unitary assembly.
Claim 3
Dependent Claim
24 words
An electroacoustic transducer according to claim 1 in which the biasing means is a resilient rod extending between the head and external tail masses.
Claim 4
Dependent Claim
23 words
An electroacoustic transducer according to claim 2 in which said reentrant controlling means comprises an integrally formed extension of said external tail mass.
Claim 5
Dependent Claim
19 words
An electroacoustic transducer according to claim 3 in which said extension is of nonuniform cross section throughout its length.
Claim 6
Dependent Claim
13 words
An electroacoustic transducer according to claim 3 in which said extension is cylindrical.
Claim 7
Dependent Claim
31 words
An electroacoustic transducer according to claim 5 in which said cylindrical extension is joined to the aforesaid external tail mass by a cylindrical neck of smaller diameter than the cylindrical extension.
Claim 8
Dependent Claim
31 words
An electroacoustic transducer according to claim 3 further including clamping means connected between said extension and the aforesaid biasing means for additional control of rocking or lateral oscillations of said extension.
Claim 9
Dependent Claim
64 words
An electroacoustic transducer according to claim 7 in which said clamping means includes: attachment means secured to the end of said extension for providing a mounting thereon; a collar attached to the aforesaid resilient rod; and flexible means connected to the attaching means and to the collar for permitting axial motion of the aforesaid reentrant means while restraining the lateral or rocking motion thereof.
Claim 10
Dependent Claim
15 words
An electroacoustic transducer according to claim 8 where said attachment means includes an annular ring.
Claim 11
Dependent Claim
17 words
An electroacoustic transducer according to claim 8 wherein said attachment means includes a plurality of spaced blocks.
Claim 12
Dependent Claim
15 words
An electroacoustic transducer according to claim 8 wherein said flexible means includes an annular diaphragm.
Claim 13
Dependent Claim
18 words
An electroacoustic transducer according to claim 8 wherein said flexible means includes a plurality of radially spaced strips.
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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |