US3745309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically heated transparent panel
Assignee: General Electric Co
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Filing: 1972-10-31
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Granted: 1973-07-10
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Expires: 1992-10-31
Abstract
Abstract An electrically heated transparent panel is described for a laminated safety glass window construction having a clear polymer inner layer with a pattern of wrinkled resistance wires oriented in a three-dimensional non-parallel random fashion so as to reduce glare from the wires when the window is used in automative and other type vehicles. The individual resistance wires are partially embedded in the polymer sheet by a technique utilizing shrinkage of a thermoplastic polymer from its original dimensions when heated to an elevated temperature together with having the individual wires change configuration when relaxed from tension forces on the wire when first assembled with the polymer sheet. An improved form of bus-bar electrode means are connected at each end of the individual resistance wires by heat-bonding directly to the thermoplastic polymer sheet to provide the composite panel which can thereafter be handled and assembled by conventional further heat-bonding as the inner layer of a laminated safety glass construction.
Inventors
- 👤 G Gruss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:25
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10036; B32B17/10165; B32B17/10293; B32B17/10376; B32B17/10385; B32B17/1055; B32B17/10761; H; H05; H05B; H05B3/00; H05B3/84; H05B3/86; B32B2307/00; B32B2307/20; B32B2307/202; B32B2307/40; B32B2307/412; B32B2307/70; B32B2307/732; B32B2307/734; B32B2307/736; B32B2315/00; B32B2315/08; B32B2398/00; B32B2398/20; H05B2203/00; H05B2203/014; H05B2203/016
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
180 words
In a laminated safety glass member which comprises a pair of glass outer layers having a composite inner layer integrally bonded thereto, said composite inner layer comprising a sheet of transparent thermoplastic polymer which has been heat shrunk from its original dimensions by heating to an elevated temperature having partially embedded in one major surface a plurality of wrinkled resistance wires which lie in closely spaced relationshIp and are oriented with respect to one another in nonparallel random fashion so that portions of said individual resistance wires protrude from said major surface of the thermoplastic polymer layer, and bus-bar electrode means connected at each end of the individual resistance wires, the improvement wherein said bus-bar electrode means consist of a thin foil strip having a segmented construction which is secured by heat-bonding directly to the thermoplastic polymer layer at each end of the individual resistance wires with a continuous foil strip of greater width and thickness which overlays the subjacent segmented strip and is also heat-bonded directly to the thermoplastic polymer layer at each end of said individual resistance wires.
Claim 2
Dependent Claim
180 words
In a laminated safety glass member which comprises a pair of glass outer layers having a composite inner layer integrally bonded thereto, said composite inner layer comprising a sheet of transparent thermoplastic polymer which has been heat shrunk from its original dimensions by heating to an elevated temperature having partially embedded in one major surface a plurality of wrinkled resistance wires which lie in closely spaced relationshIp and are oriented with respect to one another in nonparallel random fashion so that portions of said individual resistance wires protrude from said major surface of the thermoplastic polymer layer, and bus-bar electrode means connected at each end of the individual resistance wires, the improvement wherein said bus-bar electrode means consist of a thin foil strip having a segmented construction which is secured by heat-bonding directly to the thermoplastic polymer layer at each end of the individual resistance wires with a continuous foil strip of greater width and thickness which overlays the subjacent segmented strip and is also heat-bonded directly to the thermoplastic polymer layer at each end of said individual resistance wires.
Claim 3
Dependent Claim
43 words
A laminated safety glass member as in claim 1 wherein the continuous foil strip is in direct contact with the inner surface of one glass outerlayer and the individual resistance wires are positioned between said continuous foil strip and the subjacent segmented strip.
Claim 4
Dependent Claim
28 words
A laminated safety glass member as in claim 1 wherein the continuous foil strip is in direct physical contact with both resistance wires and the subjacent segmented strip.
Claim 5
Dependent Claim
81 words
A laminated safety glass member as in claim 1 wherein the continuous foil strip is in direct contact with the inner surface of one glass outerlayer, the individual resistance wires are positioned between said continuous foil strip and the subjacent segmented strip which has been partially deformed by heat-bonding to envelop the exterior surface portion of said individual resistance wires, and the opposite major surface of the thermoplastic polymer layer is heat-bonded to the inner surface of the other glass outerlayer.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |