Patent US4308516A successfully refreshed from Google Patents.
US4308516A
Expired / Lapsed
US
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Plug-in fuse assembly
Assignee: Nissan Motor Co Ltd
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Filing: 1980-02-19
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Granted: 1981-12-29
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Expires: 2000-02-19
Abstract
Abstract A plug-in fuse assembly is disclosed which includes a fuse element made up of a pair of elongated current-carrying portions in spaced relationship and a fuse-forming link portion extending between the current-carrying portions. The fuse element is placed in an insulating casing with its terminal portions projecting therefrom. Means is provided for providing a fuse opening indication in response to heat generated from the fuse-forming link portion when it opens up.
Inventors
- 👤 Yukio Shimada
- 👤 Syuichi Otani
- 👤 Susumu Hashimoto
- 👤 Michio Kasamatsu
- 👤 Teruo Suda
- 👤 Noriyasu Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:30
CPC Classifications
H; H01; H01H; H01H85/00; H01H85/02; H01H85/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
146 words
A plug-in fuse assembly comprising: (a) an insulating casing formed therein with a cavity; (b) a fuse element placed in said cavity of said casing, said fuse element made up of a pair of elongated current-carrying portions in spaced relationship, and a fuse-forming link portion extending between said current-carrying portions, said current-carrying portions having their bottom end portions extending from the bottom margin of said casing and their top end portions extending through the top wall of said casing; and (c) a resistance member placed on the outer surface of the top wall of said casing in contact with the top ends of said current-carrying portions to form a shunt electric circuit with said fuse-forming link portion, said member having a high resistance with its color changed when exposed to high temperature caused by current flow through said resistance member when said link portion is open.
Claim 2
Dependent Claim
146 words
A plug-in fuse assembly comprising: (a) an insulating casing formed therein with a cavity; (b) a fuse element placed in said cavity of said casing, said fuse element made up of a pair of elongated current-carrying portions in spaced relationship, and a fuse-forming link portion extending between said current-carrying portions, said current-carrying portions having their bottom end portions extending from the bottom margin of said casing and their top end portions extending through the top wall of said casing; and (c) a resistance member placed on the outer surface of the top wall of said casing in contact with the top ends of said current-carrying portions to form a shunt electric circuit with said fuse-forming link portion, said member having a high resistance with its color changed when exposed to high temperature caused by current flow through said resistance member when said link portion is open.
Claim 3
Dependent Claim
26 words
A plug-in fuse assembly according to claim 1, wherein said member is formed of a high-resistance metal plate having on its surface a heat responsive coat.
Claim 4
Dependent Claim
18 words
A plug-in fuse assembly according to claim 1, wherein said member is formed of a heat responsive semiconductor.
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) | 1984-12-28 | 1985-06-29 | 1985-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-28 | 1989-06-29 | 1989-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-28 | 1993-06-29 | 1993-12-29 | $7700.00 | Window Closed / Lapsed |