US4590535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Static charge dissipation circuit with electroconductive wicks
Assignee: PPG Industries Ohio Inc
•
Filing: 1983-02-04
•
Granted: 1986-05-20
•
Expires: 2003-02-04
Abstract
Abstract A device for dissipating static charge collected on the surface of a laminated aircraft window having an outboard plastic ply includes a plurality of electroconductive static charge collecting wicks extending through the thickness of the outboard ply from the outboard surface of the ply to its inboard surface where the wicks are interconnected by wire runs adapted for connection to ground. The device may be laminated to additional transparent structural plies to form a composite aircraft transparency. The device is advantageously used to protect heating facilities in a composite transparency from static discharge damage, as well as to prevent damage to the plies of the transparency from static discharge through the plies.
Inventors
- 👤 Raymond L. Mang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:59
CPC Classifications
B; B64; B64D; B64D45/00; B64D45/02; H; H05; H05F; H05F3/00; H05F3/02
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
113 words
A device for dissipating static charge comprising: a substrate having a first surface and a second opposite surface; a plurality of electroconductive members mounted in said substrate for electrically interconnecting said first surface and said second surface, each of said members defined by at least two electroconductive filaments between said first and second surfaces of said substrate and having an end portion adjacent said second surface; and a plurality of electroconductive wires electrically connecting said end portions of selected members to one another to form a plurality of individual electroconductive member and electroconductive wire assemblies, said wires having a first end and a second end wherein said first end is to be grounded.
Claim 2
Independent Claim
113 words
A device for dissipating static charge comprising: a substrate having a first surface and a second opposite surface; a plurality of electroconductive members mounted in said substrate for electrically interconnecting said first surface and said second surface, each of said members defined by at least two electroconductive filaments between said first and second surfaces of said substrate and having an end portion adjacent said second surface; and a plurality of electroconductive wires electrically connecting said end portions of selected members to one another to form a plurality of individual electroconductive member and electroconductive wire assemblies, said wires having a first end and a second end wherein said first end is to be grounded.
Claim 3
Dependent Claim
37 words
The device as in claim 1, wherein each of said members includes at least one loop of wire having a closed end adjacent said first surface and an open end accessible for connection with said electroconductive wires.
Claim 4
Dependent Claim
19 words
The device as set forth in claim 2, wherein said plurality of members is arranged in rows and columns.
Claim 5
Dependent Claim
76 words
The device as set forth in claim 3 wherein said electroconductive wire includes a longitudinal wire run for interconnecting the electroconductive members in a row, and further including a transverse wire run electrically connecting each of the second ends of alternate and adjacent longitudinal wire runs so as to have a plurality of individual conductive paths of at least two longitudinal wire runs and wherein said first ends of said wire runs are to be grounded.
Claim 6
Dependent Claim
13 words
The device as set forth in claim 4, wherein said substrate is transparent.
Claim 7
Dependent Claim
24 words
The device as set forth in claim 5, wherein said members pass through the thickness of said substrate and said members are secured therein.
Claim 8
Dependent Claim
32 words
The device as set forth in claim 6, wherein said members in said rows and said columns are spaced between about 1/2 inch (1.27 cm) and about 41/2 inches (11.4 cm) apart.
Claim 9
Dependent Claim
25 words
The device as set forth in claim 7, wherein said members in said rows and said columns are spaced about 3 inches (7.62 cm) apart.
Claim 10
Dependent Claim
109 words
The device as set forth in claim 1 wherein said substrate is a first substrate and further including: a second substrate with a first major surface secured to said second surface of said first substrate; means for electrically heating one of said substrates said heating means mounted on said first major surface of said second substrate wherein said first substrate is secured to and overlies said second substrate with a portion of said heating means between said second surface of said first substrate and said first surface of said second substrate; and further including: means for electrically insulating said electroconductive member and electroconductive wire assemblies from said heating means.
Claim 11
Dependent Claim
34 words
The device as set forth in claim 9, wherein said electrically insulating means includes a nonconductive substrate interposed between said second surface of said first substrate and said first surface of said second substrate.
Claim 12
Dependent Claim
47 words
The device as set forth in claim 10, wherein said first and said second substrates are transparent substrates and further including one or more additional transparent substrates secured to a second major surface of said second substrate to form a composite transparency suitable for an aircraft window.
Claim 13
Independent Claim
107 words
A method of providing a nonconductive substrate with means for dissipating static electric charge comprising the steps of: providing a plurality of spaced wire members, through the thickness of the substrate to electrically interconnect a first surface of the substrate with a second surface of the substrate each of said wire members having at least two electroconductive filaments; electrically interconnecting selected members with one another adjacent said second surface of said substrate so as to form a plurality of individual interconnected wire member assemblies; and grounding each of said interconnected wire member assemblies whereby charged collected on each of said assemblies moves through the assembly to ground.
Claim 14
Independent Claim
107 words
A method of providing a nonconductive substrate with means for dissipating static electric charge comprising the steps of: providing a plurality of spaced wire members, through the thickness of the substrate to electrically interconnect a first surface of the substrate with a second surface of the substrate each of said wire members having at least two electroconductive filaments; electrically interconnecting selected members with one another adjacent said second surface of said substrate so as to form a plurality of individual interconnected wire member assemblies; and grounding each of said interconnected wire member assemblies whereby charged collected on each of said assemblies moves through the assembly to ground.
Claim 15
Dependent Claim
38 words
The method as set forth in claim 12, wherein the substrate is transparent and said providing step includes providing said wire members at a spacing of between about 1/2 inch (1.27 cm) and about 41/2 inches (11.4 cm).
Claim 16
Dependent Claim
26 words
The method as set forth in claim 13, wherein said providing step includes providing said wire members at a spacing of about 3 inches (7.62 cm).
Claim 17
Dependent Claim
44 words
The method as set forth in claim 14, wherein said providing step includes providing a plurality of spaced loops of wire each having a closed end adjacent said first surface and an open end accessible from said second surface for said selectively interconnecting step.
References Cited (Backward Citations)
US2416202A
Cited
US2456373A
Cited
US2457299A
Cited
US3386001A
Cited
US3740281A
Cited
US3721595A
Cited
US3755713A
Cited
US3895433A
Cited
US4057671A
Cited
US4078107A
Cited
US4128448A
Cited
US4323946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-19 | 1989-11-18 | 1990-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-19 | 1993-11-18 | 1994-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-19 | 1997-11-18 | 1998-05-20 | $7700.00 | Window Closed / Lapsed |