US3922572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroacoustical transducer
Assignee: United States Department of the Navy
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Filing: 1974-08-12
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Granted: 1975-11-25
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Expires: 1994-08-12
Abstract
Abstract A reversible electroacoustical transducer, having a circular configuration generated about a longitudinal axis, is disclosed as incorporating a backing plate disposed normal to said longitudinal axis. A first plastic washer is disposed around said longitudinal axis and spatially disposed from said backing plate. A trio of piezoelectric ceramic energy converter rings, having similar outside diameters and different inside diameters, is spatially disposed around and along said longitudinal axis. Another plastic washer is disposed around said longitudinal axis and spatially disposed from said trio of piezoelectric ceramic energy converter rings. And, with the exception of the aforesaid backing plate, all of the aforesaid elements are encapsulated and potted in a polyurethane material, the latter of which is bonded to said backing plate.
Inventors
- 👤 Rufus L Cook
- 👤 James H Elkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:04
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0607
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
362 words
An electroacoustical transducer, comprising in combination: a substantially rigid backing plate means, having at least one hole therethrough; first washer means, having a predetermined inside diameter and a predetermined outside diameter, spatially disposed from said substantially rigid backing plate means; a first ring-shaped piezoelectric means, having a first inside diameter and a first outside diameter, spatially disposed from said first washer means, for producing a first acoustical energy in proportional response to electrical energy supplied thereto and vice versa; a second ring-shaped piezoelectric means, having a second inside diameter that is different from the first inside diameter of said first ring-shaped piezoelectric means and a scond outside diameter that is similar to the first outside diameter of said first ring-shaped piezoelectric means, for producing a second acoustical energy in proportional response to electrical energy supplied thereto and vice versa; a third ring-shaped piezoelectric means, having a third inside diameter that is different from the first and second inside diameters of said first and second ring-shaped piezoelectric means and a third outside diameter that is similar to the first and second outside diameters of said first and second ringshaped piezoelectric means, for producing a third acoustical energy in proportional response to electrical energy supplied thereto and vice versa; a second washer means having a predetermined inside diameter and a predetermined outside diameter, spatially disposed from said third ring-shaped piezoelectric means; electrical conductor means connected to said first, second, and third ring-shaped piezoelectric means and effectively passing through said at least one hole in said substantially rigid backing plate means for effecting the electrical connection thereof in a predetermined electrical circuit arrangement; a plurality of polyurethane spacer means having inside diameters greater than the largest of the inside diameters of said first, second, and third ring-shaped piezoelectric means and outside diameters smaller than the outside diameters thereof respectively disposed between adjacent ones of said first, second and third ring-shaped piezoelectric means and the aforesaid first and second washer means; and acoustically clear means connected to each of the aforesaid means for effecting the holding thereof in the aforesaid spatial dispositions, respectively, for the containment thereof as an encapsulated unit of predetermined external geometrical configuration.
Claim 2
Dependent Claim
362 words
An electroacoustical transducer, comprising in combination: a substantially rigid backing plate means, having at least one hole therethrough; first washer means, having a predetermined inside diameter and a predetermined outside diameter, spatially disposed from said substantially rigid backing plate means; a first ring-shaped piezoelectric means, having a first inside diameter and a first outside diameter, spatially disposed from said first washer means, for producing a first acoustical energy in proportional response to electrical energy supplied thereto and vice versa; a second ring-shaped piezoelectric means, having a second inside diameter that is different from the first inside diameter of said first ring-shaped piezoelectric means and a scond outside diameter that is similar to the first outside diameter of said first ring-shaped piezoelectric means, for producing a second acoustical energy in proportional response to electrical energy supplied thereto and vice versa; a third ring-shaped piezoelectric means, having a third inside diameter that is different from the first and second inside diameters of said first and second ring-shaped piezoelectric means and a third outside diameter that is similar to the first and second outside diameters of said first and second ringshaped piezoelectric means, for producing a third acoustical energy in proportional response to electrical energy supplied thereto and vice versa; a second washer means having a predetermined inside diameter and a predetermined outside diameter, spatially disposed from said third ring-shaped piezoelectric means; electrical conductor means connected to said first, second, and third ring-shaped piezoelectric means and effectively passing through said at least one hole in said substantially rigid backing plate means for effecting the electrical connection thereof in a predetermined electrical circuit arrangement; a plurality of polyurethane spacer means having inside diameters greater than the largest of the inside diameters of said first, second, and third ring-shaped piezoelectric means and outside diameters smaller than the outside diameters thereof respectively disposed between adjacent ones of said first, second and third ring-shaped piezoelectric means and the aforesaid first and second washer means; and acoustically clear means connected to each of the aforesaid means for effecting the holding thereof in the aforesaid spatial dispositions, respectively, for the containment thereof as an encapsulated unit of predetermined external geometrical configuration.
Claim 3
Dependent Claim
23 words
The device of claim 1, wherein said substantially rigid backing plate is a circular metallic backing plate having a plurality of holes therethrough.
Claim 4
Dependent Claim
23 words
The device of claim 1, wherein said substantially rigid backing plate is a circular aluminum backing plate having a plurality of holes therethrough.
Claim 5
Dependent Claim
39 words
The device of claim 1, wherein said first washer means has an inside diameter that is similar to the inside diameter of said first ring-shaped piezoelectric means and an outside diameter that is greater than the outside diameter thereof.
Claim 6
Dependent Claim
41 words
The device of claim 1, wherein said second ring-shaped piezoelectric means has an inside diameter that is greater than the inside diameter of said first ring-shaped piezoelectric means and has an outside diameter that is similar to the outside diameter thereof.
Claim 7
Dependent Claim
25 words
The device of claim 1, wherein said first ring-shaped piezoelectric means has an inside diameter of 3.000 inches and an outside diameter of 3.100 inches.
Claim 8
Dependent Claim
25 words
The device of claim 1, wherein said second ring-shaped piezoelectric means has an inside diameter of 2.900 inches and an outside diameter of 3.100 inches.
Claim 9
Dependent Claim
25 words
The device of claim 1, wherein said third ring-shaped piezoelectric means has an inside diameter of 2.950 inches and an outside diameter of 3.100 inches.
Claim 10
Dependent Claim
23 words
The device of claim 1, wherein the spaces between said first, second, and third spatially disposed ring-shaped piezoelectric means are each 0.032 inches.
Claim 11
Dependent Claim
59 words
The device of claim 1, wherein said third ring-shaped piezoelectric means has an inside diameter that is smaller than the inside diameter of said second ring-shaped piezoelectric means and larger than the inside diameter of said first ring-shaped piezoelectric means and an outside diameter that is similar to the outside diameter of said first and second ring-shaped piezoelectric means.
Claim 12
Dependent Claim
35 words
The device of claim 1, wherein each of said first, second, and third ring-shaped piezoelectric means comprises a lead zirconate-lead titanate ceramic ring and a pair of silver electrodes connected to opposite side surfaces thereof.
Claim 13
Dependent Claim
39 words
The device of claim 1, wherein said second washer means has an inside diameter that is similar to the inside diameter of said third ring-shaped piezoelectric means and an outside diameter that is greater than the outside diameter thereof.
Claim 14
Dependent Claim
33 words
The device of claim 1, wherein said acoustically clear means connected to each of the aforesaid means for effecting the holding thereof in the aforesaid spatial dispositions comprises a substantially resilient polyurethane material.
Claim 15
Dependent Claim
85 words
The device of claim 1, wherein said electrical conductor means comprises: a pair of electrodes connected to opposite surface sides of each of said first, second, and third ring-shaped piezoelectric means; and a pair of electric wires respectively connected to each of the similar side electrodes of the pair of electrodes connected to opposite surface sides of each of said first, second, and third ring-shaped piezoelectric means for effecting the connection of said first, second, and third ring-shaped piezoelectric means in predetermined electrical circuit arrangement.
Claim 16
Dependent Claim
15 words
The device of claim 14, wherein said predetermined electrical circuit arrangement is in electrical parallel.
Claim 17
Dependent Claim
15 words
The device of claim 14, wherein said predetermined electrical circuit arrangement is in electrical series.
Claim 18
Dependent Claim
28 words
The device of claim 14, wherein said predetermined electrical circuit arrangement is such that said first, second, and third ring-shaped piezoelectric means are connected in electrically independent arrangement.
Claim 19
Dependent Claim
75 words
The device of claim 1, wherein said acoustically clear means connected to each of the aforesaid means for effecting the holding thereof in the aforesaid spatial disposition is further disposed in such manner as to encapsulate said first washer means, said first, second, and third ring-shaped piezoelectric means, said second washer means, and is connected to said substantially rigid backing plate means in such manner to be securely attached thereto as effectively an extension thereof.
Claim 20
Dependent Claim
68 words
The invention of claim 18, further characterized by a substantially rigid forwarding plate disposed in abutment with that external surface portion of the aforesaid acoustically clear encapsulating means that is adjacent to said second washer means; and means connected between said substantially rigid backing and forwarding plate means for holding said encapsulated first washer means, first, second, and third ring-shaped piezoelectric means, and said second washer means therebetween.
Claim 21
Dependent Claim
32 words
The invention of claim 19, wherein said means connected between said substantially rigid backing and forwarding plate means comprises at least one threaded bolt and a nut screwed on the end thereof.
Claim 22
Dependent Claim
64 words
The invention of claim 19, wherein said means connected between said substantially rigid backing and forwarding plate means comprises: an end threaded bolt extending through said substantially rigid backing plate means, said encapsulated first washer, first, second, and third ring-shaped piezoelectric means, second washer means, and said substantially rigid forwarding plate means; and a nut tightly screwed on the threaded end of said bolt.
Claim 23
Dependent Claim
62 words
The invention of claim 20, further characterized by: a first compartment connected to the rear end of said substantially rigid backing plate means adapted for housing a predetermined electronic utilization apparatus that is electrically connected to the aforesaid electrical conductor means; and a second compartment, having a substantially streamlined nose configuration, connected to the front of said substantially rigid forwarding plate means.
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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |