US3894243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric transducer array
Assignee: United States Department of the Navy
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Filing: 1974-06-06
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Granted: 1975-07-08
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Expires: 1994-06-06
Abstract
Abstract An array of polymeric film transducers and method for making the array. The array consists of two sandwiches. The first comprises an array of identical areas of conductive film laid down on a sheet of permanently polarizable polymeric film. A second conductive film is laid down on the back of the polymeric sheet and the polymeric film is permanently polarized under each of the first set of conductive areas, thus forming an array of active transducing areas. Leads of conductive film are then laid down, one to each of the identical conductive areas. External leads are connected to each of the transducing area leads. A second sandwich is made which is identical to the first except that it is a mirror-image of the first and has no external leads. The two sandwiches are adhered together with the identical conductive areas and leads facing each other and in correspondence with each other.
Inventors
- 👤 Seymour Edelman
- 👤 Steven C Roth
- 👤 Carol F Vezzetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:12
CPC Classifications
G; G01; G01L; G01L1/00; G01L1/16; B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0688; B06B1/0692
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
200 words
An array of polymeric film transducers for sensing dynamic pressure and vibrations comprising: a first film sandwich comprising a sheet of permanently polarizable polymeric film coated with a plurality of geometrically shaped areas of electrically conductive material on one surface, said areas being laid down in a desired array configuration, said polymeric film being coated on the other surface with a conductive material which covers at least the same area covered on the first side by the geometrically shaped areas, the area of polymeric film under each geometrically shaped area being permanently poled, said first surface of said polymeric film further having leads of conductive material laid down thereon, a different lead being connected to and extending from each said geometrically shaped area; a second film sandwich which is a mirror image of the first, said second sandwich being placed in geometrical correspondence with the first with respect to the geometrically shaped areas and their leads which form the interface, the two sandwiches being adhered to each other to form a composite sandwich; electrical connection means making electrical contact with the leads in the interface area; and electrical connection means making electrical contact with both of said outer conductive coatings.
Claim 2
Dependent Claim
200 words
An array of polymeric film transducers for sensing dynamic pressure and vibrations comprising: a first film sandwich comprising a sheet of permanently polarizable polymeric film coated with a plurality of geometrically shaped areas of electrically conductive material on one surface, said areas being laid down in a desired array configuration, said polymeric film being coated on the other surface with a conductive material which covers at least the same area covered on the first side by the geometrically shaped areas, the area of polymeric film under each geometrically shaped area being permanently poled, said first surface of said polymeric film further having leads of conductive material laid down thereon, a different lead being connected to and extending from each said geometrically shaped area; a second film sandwich which is a mirror image of the first, said second sandwich being placed in geometrical correspondence with the first with respect to the geometrically shaped areas and their leads which form the interface, the two sandwiches being adhered to each other to form a composite sandwich; electrical connection means making electrical contact with the leads in the interface area; and electrical connection means making electrical contact with both of said outer conductive coatings.
Claim 3
Dependent Claim
30 words
An array as in claim 1, wherein each said lead carries a dot of conductive adhesive thereon, the electrical connection means for each lead making contact with its associated dot.
Claim 4
Dependent Claim
12 words
An array as in claim 1, wherein the conductive coatings are metallic.
Claim 5
Dependent Claim
33 words
An array as in claim 1, wherein the geometrically shaped coatings and their leads are formed from aluminum and the outer coatings from nickel, the nickel coatings being thin enough to be transparent.
Claim 6
Dependent Claim
44 words
An array as in claim 1, wherein a thick coating of pliable adhesive is placed over the composite sandwich to cover the area of connection of the electrical connection means to the leads, said adhesive also covering a part of the incoming connection means.
Claim 7
Dependent Claim
24 words
An array as in claim 1, wherein said electrical connection means making contact with said outer conductive coatings is an electrically conductive adhesive material.
Claim 8
Dependent Claim
13 words
An array as in claim 7, wherein said conduCtive coating is silver-filled epoxy.
Claim 9
Dependent Claim
16 words
An array as in claim 5, wherein said coating of adhesive is formed from epoxy resin.
Claim 10
Independent Claim
187 words
A method for making a polymeric film transducer array for sensing dynamic pressure and vibrations comprising the steps of: coating one surface of a sheet of permanently polarizable polymeric film with an electrically conductive film in the shape of geometrically shaped spaced areas which form a desired array configuration and with a different lead to each such area; coating the other side of the polymeric sheet with an electrically conductive film to cover at least the area covered by said geometrically shaped areas; permanently polarizing the areas of polymeric film underlying said geometrically shaped areas to form active transducing areas; forming another such transducing sandwich of conductive film-polymeric film-conductive film which is a mirror image of the first; connecting a different external electrical lead to each internal lead of the first sandwich; adhering both sandwiches together with the surfaces containing the geometrically shaped areas forming the interface, the geometrically shaped areas and leads of one surface being in geometrical correspondence with those of the other surface to form a composite sandwich; and connecting an electrical lead to both coatings on the outer surfaces of said composite sandwich.
Claim 11
Independent Claim
187 words
A method for making a polymeric film transducer array for sensing dynamic pressure and vibrations comprising the steps of: coating one surface of a sheet of permanently polarizable polymeric film with an electrically conductive film in the shape of geometrically shaped spaced areas which form a desired array configuration and with a different lead to each such area; coating the other side of the polymeric sheet with an electrically conductive film to cover at least the area covered by said geometrically shaped areas; permanently polarizing the areas of polymeric film underlying said geometrically shaped areas to form active transducing areas; forming another such transducing sandwich of conductive film-polymeric film-conductive film which is a mirror image of the first; connecting a different external electrical lead to each internal lead of the first sandwich; adhering both sandwiches together with the surfaces containing the geometrically shaped areas forming the interface, the geometrically shaped areas and leads of one surface being in geometrical correspondence with those of the other surface to form a composite sandwich; and connecting an electrical lead to both coatings on the outer surfaces of said composite sandwich.
Claim 12
Dependent Claim
12 words
A method as in claim 9, wherein said conductive coatings are metallic.
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) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |