US4376302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric polymer hydrophone
Assignee: United States Department of the Navy
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Filing: 1978-04-13
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Granted: 1983-03-08
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Expires: 1998-04-13
Abstract
Abstract A piezoelectric polymer hydrophone including a single flexible sheet of a ezoelectric polymer having a plurality of electrode strips on the top and bottom of the sheet. The electrode strips at the top are staggered by one half the width of a strip relative to the corresponding strips at the bottom of the sheet. The polymer sheet can be rolled into a helix without losing its acoustic sensitivity.
Inventors
- 👤 Harry B. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:01
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0688; B06B1/0696; H; H04; H04R; H04R17/00; H04R17/005; Y; Y10; Y10S; Y10S310/00; Y10S310/80
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
133 words
A device for converting acoustic signals into electric voltage signals comprising: at least one relatively thin sheet of a piezoelectric polymer having a first plurality of metalized strips on the top surface thereof, having adjacent members separated by a first group of insulating spaces; and a second plurality of metalized strips at the bottom surface thereof, having adjacent members separated by a second group of insulating spaces; the members of said first plurality of metalized strips being staggered from the corresponding members of said second plurality of metalized strips; adjacent strips of said polymer sheet associated with said first plurality of metalized strips and said second plurality of metalized strips having been polarized and being automatically and inherently electrically connected in series for generating electric voltage signals in response to the acoustic signals.
Claim 2
Independent Claim
133 words
A device for converting acoustic signals into electric voltage signals comprising: at least one relatively thin sheet of a piezoelectric polymer having a first plurality of metalized strips on the top surface thereof, having adjacent members separated by a first group of insulating spaces; and a second plurality of metalized strips at the bottom surface thereof, having adjacent members separated by a second group of insulating spaces; the members of said first plurality of metalized strips being staggered from the corresponding members of said second plurality of metalized strips; adjacent strips of said polymer sheet associated with said first plurality of metalized strips and said second plurality of metalized strips having been polarized and being automatically and inherently electrically connected in series for generating electric voltage signals in response to the acoustic signals.
Claim 3
Dependent Claim
17 words
The device of claim 1 wherein said adjacent strips of polymer sheet are polarized in alternate directions.
References Cited (Backward Citations)
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Cited
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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) | 1986-03-07 | 1986-09-06 | 1987-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-07 | 1990-09-06 | 1991-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-07 | 1994-09-06 | 1995-03-08 | $7700.00 | Window Closed / Lapsed |