Claims
- 1. A transducer comprising:
- a first and a second spaced apart member for defining an inner spacing between the first and second member, each member having a corresponding spaced apart radiating surface, the radiating surface for generating a wave of energy in a transmitting medium in response to a driving force communicated to the first and second member;
- a plurality of containment means coupled to the first and second member and extending outwardly beyond at least one of the radiating surfaces, the containment means for communicating the driving force to the first and second member;
- a corresponding plurality of driving means respectively disposed within and coupled to the containment means, the driving means for generating the driving force in response to a change in a predetermined dimension of the driving means from influence by excitation energy; and
- sealing means connected to the first and second member, the sealing means for preventing transmitting fluid from entering the spacing between the first and second member.
- 2. The transducer as in claim 1, wherein the first and second member include a respective flat plate and the radiating surface includes a respective flat surface of the plate.
- 3. The transducer as in claim 2, wherein the containment means are coupled to each of the members for communicating the driving force to the first and second member and further wherein the containment means extend outwardly beyond each of the radiating surfaces.
- 4. The transducer as in claim 3, wherein the containment means include a protrusion extending outwardly from each radiating surface, each protrusion including a central cavity, a corresponding central cavity being mutually aligned for receiving the driving means.
- 5. The transducer as in claim 2, wherein the first and second plate are disposed with respect to each other such that the radiating surfaces are parallel to each other.
- 6. The transducer as in claim 5, wherein the containment means include a respective longitudinal axis and further wherein the longitudinal axis of the containment means is disposed perpendicular to the radiating surface of the first member.
- 7. The transducer as in claim 5, wherein the driving means include a respective longitudinal axis and further wherein the longitudinal axis of the driving means is disposed perpendicular to the radiating surface of the first member.
- 8. The transducer as in claim 5, wherein the longitudinal extent of the containment means is selectable so that the distance between the first and second member may be predeterminedly selected for operation at a predetermined bandwidth, the bandwidth inversely proportional to the value of the distance.
- 9. The transducer as in claim 5, wherein the distance between the first and second member is at a minimum acceptable distance so that the first and second members do not contact each other when the driving force is communicated to the first and second member, whereby a maximum bandwidth may be obtained.
- 10. The transducer as in claim 5, wherein the first and second plate include a respective cylindrical margin to define a disk, and further wherein the containment means are circumferentially spaced apart with respect to each other.
- 11. A transducer assembly having a selectable steepness of resonance and a corresponding selectable bandwidth, comprising:
- radiating means having a first and a second spaced apart surface, the first and second surface disposed at a first predetermined spacing with respect to each other and each surface for generating a wave of energy in response to a driving force;
- driving means coupled to the radiating means and extending beyond the first surface, the driving means having a quiescent longitudinal dimension, the driving means for changing the size of the longitudinal dimension in response to excitation energy, wherein a change in longitudinal dimension imparts a component of the driving force transverse the first and second surface, and further wherein the bandwidth is inversely proportional to the value of the predetermined spacing; and
- sealing means connected to the radiating means, the sealing means for preventing transmitting fluid from entering the spacing between the first and second surface,
- wherein the radiating means include a first and second flat disk, the first surface being disposed on the first disk and the second surface being disposed on the second disk and the driving means include a plurality of circumferentially spaced apart containment means connected to the first and second disk, the containment means for coupling the component of the driving force to the first and second disk.
- 12. A method for selecting the bandwidth of a transducer, comprising:
- providing a spaced apart first and a second member to form a space therebetween, the first and second member having a respective radiating surface for generating a wave of energy in a transmitting medium in response to a driving force;
- disposing plurality of containment means to extend outwardly beyond at least one of the radiating surfaces for communicating the driving force to the first and second member;
- coupling one of a corresponding plurality of driving means to a respective one of the containment means for generating the driving force in response to a change in a predetermined dimension of the driving means; and
- sealing the space between the first and second member against invasion by transmitting medium,
- wherein the bandwidth of the transducer is inversely proportional to the distance between the respective radiating surfaces.
- 13. The method as in claim 12, wherein the step of disposing further includes disposing the plurality of containment means to extend outwardly beyond both of the radiating surfaces.
- 14. The method as in claim 12, wherein the first and second member include a respective flat plate and further wherein:
- the step of providing includes disposing first and second plate so that the respective radiating surfaces are parallel each other; and
- the step of disposing includes disposing the plurality of containment means so that a longitudinal axis thereof is perpendicular one of the radiating surfaces.
- 15. The method as in claim 12, wherein the first and second member include a respective flat plate and further wherein:
- the step of providing includes disposing first and second plate so that the respective radiating surfaces are parallel each other; and
- the step of coupling includes coupling so that a longitudinal axis of the one of a corresponding plurality of driving means is disposed perpendicular one of the radiating surfaces.
Parent Case Info
This application is a continuation-in-part of copending patent application entitled "Moment Bender Transducer" filed on Dec. 24, 1990 having a Ser. No. 07/633,142 and assigned to the same assignee as hereof, now abandoned.
US Referenced Citations (2)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
633142 |
Dec 1990 |
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