US4306213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Layered plastic fuse
Assignee: General Electric Co
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Filing: 1980-01-28
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Granted: 1981-12-15
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Expires: 2000-01-28
Abstract
Abstract This invention relates to fuses for electrical plugs and more particularly to a high and low overcurrent stratified fuse for use in a low power electrical circuit. The fuse has a layered construction in which a particulate conductive link is cooperatively applied and adhered to a heat deformable substrate. The substrate in a further preferred embodiment is thermally isolated by an insulating layer abutting the substrate on the side opposite the conductive link. The conductive link melts or disintegrates in response to high over current conditions. The substrate deforms and breaks the conductive link applied thereto in response to low over current conditions.
Inventors
- 👤 John A. Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:54
CPC Classifications
H; H01; H01H; H01H85/00; H01H85/02; H01H85/04; H01H85/041; H01H85/046; H01R; H01R13/00; H01R13/66; H01R13/68; H01H85/0039; H01H85/0073
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
43 words
A layered fuse comprising a conductive link applied and cooperatively adhered to a non-oriented plastic substrate, wherein said substrate deforms and fractures said conductive link in response to lower over current conditions and said conductive link disintegrates in response to high over currents.
Claim 2
Dependent Claim
43 words
A layered fuse comprising a conductive link applied and cooperatively adhered to a non-oriented plastic substrate, wherein said substrate deforms and fractures said conductive link in response to lower over current conditions and said conductive link disintegrates in response to high over currents.
Claim 3
Dependent Claim
13 words
The layered fuse of claim 1 wherein said substrate is a thermoplastic material.
Claim 4
Dependent Claim
18 words
The layered fuse of claim 1 wherein said substrate is selected from the class containing polyester and polystyrene.
Claim 5
Dependent Claim
15 words
The layered fuse of claim 1 wherein said substrate is 0.001 to 0.01 inches thick.
Claim 6
Dependent Claim
23 words
The layered fuse of claim 1 wherein said conductive link is approximately 0.0075-0.002 inches thick; is 0.020-0.280 inches wide and 0.200 inches long.
Claim 7
Dependent Claim
28 words
The layered fuse of claim 1 wherein said fuse is enclosed with a plug on a mounting plate, said mounting plate having a cavity beneath the fuse elements.
Claim 8
Dependent Claim
23 words
The layered fuse of claim 1 wherein said fuse further includes a thermally insulating backing layer on the side opposite the conductive link.
Claim 9
Dependent Claim
15 words
The layered fuse of claim 7 wherein said backing layer is secured to said substrate.
Claim 10
Dependent Claim
15 words
The layered fuse of claim 7 wherein said backing layer comprises a polyurethane foam material.
Claim 11
Dependent Claim
16 words
The layered fuse of claim 9 wherein said backing has a density of approximately 20 lbs/cu.ft.
Claim 12
Dependent Claim
33 words
The layered fuse of claim 7 wherein said backing layer supports said substrate in resilient compression within a plug housing, and said conductive link is in pressure contact with a pair of terminals.
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) | 1984-12-14 | 1985-06-15 | 1985-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-14 | 1989-06-15 | 1989-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-14 | 1993-06-15 | 1993-12-15 | $7700.00 | Window Closed / Lapsed |