Patent US4035761A successfully refreshed from Google Patents.
US4035761A
Expired / Lapsed
US
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Sonar transducer having inertial inductor
Assignee: Raytheon Co
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Filing: 1975-10-20
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Granted: 1977-07-12
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Expires: 1995-10-20
Abstract
Abstract A transducer assembly in which a transducer unit of a piezoelectric material which is rigidly held between a rear member and a front member, both of which are made to vibrate upon energizing the piezoelectric material. Inductive elements comprising copper conductors wound about iron cores and utilized in the tuning of the transducer assembly are rigidly connected to one or both of the members and may also be connected to the transducer unit itself to serve as a portion of the inertial mass which imparts a mechanical vibrational characteristic to the transducer assembly. In one embodiment of the invention, the rear member is provided with a void wherein there is nested an inductor having an inertia similar to that of the material removed from the rear member in forming the void.
Inventors
- 👤 Stanley L. Ehrlich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:07
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0607; B06B1/0611; B06B1/0618
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
129 words
A sonar transducer comprising: a transducer unit; a front member and a rear member positioned at opposite ends of said transducer unit; means for rigidly supporting said front member and said rear member and said transducer unit in mechanical contact with each other to provide a mechanically resonant system; an inductor having inductance for tuning the capacitance of said transducer unit; means for rigidly mounting said inductor to one of said members, the mass of said inductor plus the mass of said member to which said inductor is mounted being selected to provide a desired resonance frequency through a mechanical resonance, said member to which said inductor is mounted having a void, said inductor being nested in said void; and wherein said inductor has the form of a toroid.
Claim 2
Dependent Claim
129 words
A sonar transducer comprising: a transducer unit; a front member and a rear member positioned at opposite ends of said transducer unit; means for rigidly supporting said front member and said rear member and said transducer unit in mechanical contact with each other to provide a mechanically resonant system; an inductor having inductance for tuning the capacitance of said transducer unit; means for rigidly mounting said inductor to one of said members, the mass of said inductor plus the mass of said member to which said inductor is mounted being selected to provide a desired resonance frequency through a mechanical resonance, said member to which said inductor is mounted having a void, said inductor being nested in said void; and wherein said inductor has the form of a toroid.
Claim 3
Dependent Claim
48 words
A transducer according to claim 1 wherein said toroidal inductor has an axis coinciding with an axis of said transducer, and wherein said supporting means comprises rod means positioned along said axis and passing through said toroidal inductor for urging together said front member and said rear member.
Claim 4
Dependent Claim
41 words
A sonar transducer according to claim 1 wherein the mass of said inductor approximates the mass of a quantity of material of the member having said void, said quantity of material having a volume equal to the volume of said void.
Claim 5
Dependent Claim
32 words
A sonar transducer according to claim 1 wherein said mechanical contact is provided via an electrical insulator to prevent the dissipation of power via an induced current passing through said supporting means.
References Cited (Backward Citations)
US2963681A
Cited
US3185869A
Cited
US3283590A
Cited
US3374663A
Cited
US3389276A
Cited
US3427481A
Cited
US3460061A
Cited
US3716828A
Cited
US3769532A
Cited
US3794866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |