US4533794A
Expired / Lapsed
US
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Electrode for electrostatic transducer
Assignee: ALEXANDER MICHAEL T
•
Filing: 1983-05-23
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Granted: 1985-08-06
•
Expires: 2003-05-23
Abstract
Abstract An electrode (13) has a nonconductive substrate (15) and a conductive layer (16) having a first plurality of holes (18) applied to the substrate which is then coated with a dielectric layer (20) wherein the dielectric layer has a relatively low resistivity (e.g. 10 11 ohm cm). A second and third plurality of holes (700,710), concentric with but of smaller diameter than the first plurality of holes (18), are formed through the dielectric layer (20) and the nonconductive substrate (15), thereby providing a recess spacing (19) between the conductive layer holes (18) and the holes (700,710). In one embodiment of an electrostatic transducer (11), two electrodes (13) are spaced from a diaphragm (12) positioned therebetween. An electrostatic transducer (40) having multiple diaphragms (12,21) is made by incorporating two types of electrodes (13,28). One type of electrode (13) has one side of a nonconductive substrate (15) coated with a conductor (16) and a dielectric layer (20). The other type of electrode (28) has two sides of a nonconductive substrate (17) coated first with a conductive layer (60,61) and then with a dielectric layer (100,101).
Inventors
- 👤 Harold N. Beveridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:16
CPC Classifications
H; H04; H04R; H04R19/00; H04R19/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49005
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
84 words
An electrode for use in an electrostatic transducer, comprising: planar nonconductive means having a plurality of first holes; a conductive layer on a first side of said planar member, said conductive layer having a plurality of second holes; and a dielectric layer having a volume resistivity of not more than 10 13 ohm cm on said first side of said planar member to sandwich said conductive layer between said planar member and said dielectric layer, said dielectric layer having a plurality of third holes.
Claim 2
Dependent Claim
84 words
An electrode for use in an electrostatic transducer, comprising: planar nonconductive means having a plurality of first holes; a conductive layer on a first side of said planar member, said conductive layer having a plurality of second holes; and a dielectric layer having a volume resistivity of not more than 10 13 ohm cm on said first side of said planar member to sandwich said conductive layer between said planar member and said dielectric layer, said dielectric layer having a plurality of third holes.
Claim 3
Dependent Claim
23 words
An electrode as described in claim 1 wherein said dielectric layer has a volume resistivity of no more than 10 11 ohm cm.
Claim 4
Dependent Claim
17 words
An electrode as described in claim 1 wherein said dielectric layer is comprised of a polyamide material.
Claim 5
Dependent Claim
15 words
An electrode as described in claim 3 wherein said dielectric layer is comprised of nylon.
Claim 6
Dependent Claim
31 words
An electrode as described in claim 1 wherein said dielectric layer is in a range from 3-15 mils thick and is laminated onto said conductive layer and said first planar member.
Claim 7
Dependent Claim
39 words
An electrode as described in claim 1 wherein said first holes are concentric with said second holes, and wherein said first holes in said planar nonconductive means are of smaller diameter than said second holes in said conductive layer.
Claim 8
Dependent Claim
15 words
An electrode as described in claim 1 wherein said conductive layer is comprised of copper.
Claim 9
Dependent Claim
46 words
An electrode as described in claim 1, further comprising: a second conductive layer on a second side of said planar member; and a second dielectric layer having a volume resistivity of not more than 10 13 ohm cm covering said second side of said planar member.
Claim 10
Dependent Claim
121 words
An electrostatic transducer, comprising: first and second electrodes, each electrode being comprised of: planar nonconductive means having a plurality of first holes; a conductive layer on a first side of said planar member, said conductive layer having a plurality of second holes; and, a dielectric layer having a volume resistivity of not more than 10 13 ohm cm on said first side of said planar member to sandwich said conductive layer between said planar member and said dielectric layer, said dielectric layer having a plurality of third holes; diaphragm means bonded to and spaced from said first and second electrodes; and nonconductive bonding and spacing means for bonding and spacing said diaphragm means to and between said first and second electrodes.
Claim 11
Dependent Claim
121 words
An electrostatic transducer, comprising: first and second electrodes, each electrode being comprised of: planar nonconductive means having a plurality of first holes; a conductive layer on a first side of said planar member, said conductive layer having a plurality of second holes; and, a dielectric layer having a volume resistivity of not more than 10 13 ohm cm on said first side of said planar member to sandwich said conductive layer between said planar member and said dielectric layer, said dielectric layer having a plurality of third holes; diaphragm means bonded to and spaced from said first and second electrodes; and nonconductive bonding and spacing means for bonding and spacing said diaphragm means to and between said first and second electrodes.
Claim 12
Dependent Claim
20 words
An electrostatic transducer as described in claim 9 wherein said bonding and spacing means is comprised of an elastomeric material.
Claim 13
Dependent Claim
19 words
An electrostatic transducer as described in claim 10 wherein said bonding and spacing elastomeric material is a silicone rubber.
Claim 14
Dependent Claim
17 words
An electrostatic transducer as described in claim 9 wherein said diaphragm is coated with a conductive coating.
Claim 15
Dependent Claim
16 words
An electrostatic transducer as described in claim 12 wherein said diaphragm is comprised of aluminized Mylar.
Claim 16
Dependent Claim
17 words
An electrostatic transducer as described in claim 12 wherein said diaphragm has a high resistance coating thereon.
Claim 17
Dependent Claim
24 words
An electrostatic transducer as described in claim 9 wherein said dielectric layer has a volume resistivity of not more than 10 11 ohm cm.
Claim 18
Dependent Claim
158 words
A multiple diaphragm electrostatic transducer comprising: a first electrode having a nonconductive substrate with one side coated first with a conductive layer and next coated with a dielectric layer having a volume resistivity of not more than 10 13 ohm cm; a first diaphragm bonded to and spaced from said first electrode; a second electrode bonded to and spaced from said first diaphragm, said second electrode having a nonconductive substrate with each of two sides first coated with a conductive layer and next coated with a dielectric layer having a volume resistivity of not more than 10 13 ohm cm; a second diaphragm bonded to and spaced from said second electrode; and, a third electrode bonded to and spaced from said second diaphragm, said third electrode having a nonconductive substrate with one side first coated with a conductive layer and next coated with a dielectric layer having a volume resistivity of not more than 10 13 ohm cm.
Claim 19
Dependent Claim
158 words
A multiple diaphragm electrostatic transducer comprising: a first electrode having a nonconductive substrate with one side coated first with a conductive layer and next coated with a dielectric layer having a volume resistivity of not more than 10 13 ohm cm; a first diaphragm bonded to and spaced from said first electrode; a second electrode bonded to and spaced from said first diaphragm, said second electrode having a nonconductive substrate with each of two sides first coated with a conductive layer and next coated with a dielectric layer having a volume resistivity of not more than 10 13 ohm cm; a second diaphragm bonded to and spaced from said second electrode; and, a third electrode bonded to and spaced from said second diaphragm, said third electrode having a nonconductive substrate with one side first coated with a conductive layer and next coated with a dielectric layer having a volume resistivity of not more than 10 13 ohm cm.
Claim 20
Dependent Claim
26 words
A multiple diaphragm electrostatic transducer as described in claim 16 wherein said dielectric layer has a volume resistivity of not more than 10 11 ohm cm.
Claim 21
Dependent Claim
96 words
An electrode for use in an electrostatic transducer, comprising: planar nonconductive means having a plurality of first holes; a conductive layer on a first side of said planar member, said conductive layer having a plurality of second holes; and a dielectric layer on said first side of said planar member to sandwich said conductive layer between said planar member and said dielectric layer, said dielectric layer having a plurality of third holes; wherein said dielectric layer is made from material selected from the group consisting of polyamide, polyvinylchloride, cellulose nitrate, cellulose acetate, or cellulose acetate butyrate.
Claim 22
Dependent Claim
96 words
An electrode for use in an electrostatic transducer, comprising: planar nonconductive means having a plurality of first holes; a conductive layer on a first side of said planar member, said conductive layer having a plurality of second holes; and a dielectric layer on said first side of said planar member to sandwich said conductive layer between said planar member and said dielectric layer, said dielectric layer having a plurality of third holes; wherein said dielectric layer is made from material selected from the group consisting of polyamide, polyvinylchloride, cellulose nitrate, cellulose acetate, or cellulose acetate butyrate.
Claim 23
Dependent Claim
13 words
An electrode as described in claim 18 wherein said polyamide is a nylon.
Claim 24
Dependent Claim
133 words
An electrostatic transducer, comprising: first and second electrodes, each electrode being comprised of: planar nonconductive means having a plurality of first holes; a conductive layer on a first side of said planar member, said conductive layer having a plurality of second holes; and, a dielectric layer on said first side of said planar member to sandwich said conductive layer between said planar member and said dielectric layer, said dielectric layer having a plurality of third holes; diaphragm means bonded to and spaced from said first and second electrodes; and nonconductive bonding and spacing means for bonding and spacing said diaphragm means to and between said first and second electrodes; wherein said dielectric layer is made from material selected from the group consisting of polyamide, polyvinylchloride, cellulose nitrate, cellulose acetate, or cellulose acetate butyrate.
Claim 25
Dependent Claim
133 words
An electrostatic transducer, comprising: first and second electrodes, each electrode being comprised of: planar nonconductive means having a plurality of first holes; a conductive layer on a first side of said planar member, said conductive layer having a plurality of second holes; and, a dielectric layer on said first side of said planar member to sandwich said conductive layer between said planar member and said dielectric layer, said dielectric layer having a plurality of third holes; diaphragm means bonded to and spaced from said first and second electrodes; and nonconductive bonding and spacing means for bonding and spacing said diaphragm means to and between said first and second electrodes; wherein said dielectric layer is made from material selected from the group consisting of polyamide, polyvinylchloride, cellulose nitrate, cellulose acetate, or cellulose acetate butyrate.
Claim 26
Dependent Claim
14 words
An electrostatic transducer as described in claim 20 wherein said polyamide is a nylon.
Claim 27
Dependent Claim
146 words
A multiple diaphragm electrostatic transducer comprising: a first electrode having a nonconductive substrate with one side coated first with a conductive layer and next coated with a dielectric layer; a first diaphragm bonded to and spaced from said first electrode; a second electrode bonded to and spaced from said first diaphragm, said second electrode having a nonconductive substrate with each of two sides first coated with a conductive layer and next coated with a dielectric layer; a second diaphragm bonded to and spaced from said second electrode; and a third electrode bonded to and spaced from said second diaphragm, said third electrode having a nonconductive substrate with one side first coated with a conductive layer and next coated with a dielectric layer; wherein said dielectric layers are made from materials selected from the group consisting of polyamide, polyvinylchloride, cellulose nitrate, cellulose acetate, or cellulose acetate butyrate.
Claim 28
Dependent Claim
146 words
A multiple diaphragm electrostatic transducer comprising: a first electrode having a nonconductive substrate with one side coated first with a conductive layer and next coated with a dielectric layer; a first diaphragm bonded to and spaced from said first electrode; a second electrode bonded to and spaced from said first diaphragm, said second electrode having a nonconductive substrate with each of two sides first coated with a conductive layer and next coated with a dielectric layer; a second diaphragm bonded to and spaced from said second electrode; and a third electrode bonded to and spaced from said second diaphragm, said third electrode having a nonconductive substrate with one side first coated with a conductive layer and next coated with a dielectric layer; wherein said dielectric layers are made from materials selected from the group consisting of polyamide, polyvinylchloride, cellulose nitrate, cellulose acetate, or cellulose acetate butyrate.
Claim 29
Dependent Claim
16 words
A multiple diaphragm electrostatic transducer as described in claim 22 wherein said polyamide is a nylon.
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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) | 1988-08-05 | 1989-02-04 | 1989-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-05 | 1993-02-04 | 1993-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-05 | 1997-02-04 | 1997-08-06 | $7700.00 | Window Closed / Lapsed |