Patent US6308059B1 successfully refreshed from Google Patents.
US3858142A
Expired / Lapsed
US
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Fuse and method of making same
Assignee: Olvis NV
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Filing: 1973-06-20
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Granted: 1974-12-31
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Expires: 1993-06-20
Abstract
Abstract A fuse comprising a fusible element mounted in a housing and carrying a plurality of relatively closely spaced activator cores. A method of making the fuse comprises the steps of punching discs from a strip of activator material, applying these discs to the fusible element in the desired spaced apart relationship, heating the fusible element carrying the discs so as to melt these discs to form the activator cores, and mounting this fusible element in the housing. An alternative method of making the fuse comprises the steps of applying a photoresist layer to the fusible element, locally exposing and etching the photoresist layer, selectively applying activator material to the fusible element by electroplating, and mounting this fusible element in the housing.
Inventors
- 👤 G Deelman
- 👤 J Kramer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:05
CPC Classifications
H; H01; H01H; H01H69/00; H01H69/02; H01H85/00; H01H85/02; H01H85/04; H01H85/05; H01H85/055; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49107
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
92 words
A method of making a fuse wherein small discs are punched from a strip of thinly rolled activator material, the discs then being disposed on a fusible wire in spaced apart relationship with the activator side facing the wire, the wire being previously provided with an adhesive coating, the wire with the discs being passed along a heating means so as to melt each disc to form an activator core on the fusible wire, whereafter a desired length of the fusible wire carrying the activator cores is mounted in an appropriate housing.
Claim 2
Independent Claim
92 words
A method of making a fuse wherein small discs are punched from a strip of thinly rolled activator material, the discs then being disposed on a fusible wire in spaced apart relationship with the activator side facing the wire, the wire being previously provided with an adhesive coating, the wire with the discs being passed along a heating means so as to melt each disc to form an activator core on the fusible wire, whereafter a desired length of the fusible wire carrying the activator cores is mounted in an appropriate housing.
Claim 3
Dependent Claim
42 words
A method according to claim 1, wherein the discs are punched with a substantially larger diameter than the diameter of the fusible wire and the discs are melted by absorption of infrared radiation, the fusible wire remaining at a relatively low temperature.
Claim 4
Dependent Claim
48 words
A method of making a fuse according to claim 1 wherein very small activator cores are provided on a fusible element by applying a photoresist layer to the fusible element, locally exposing and etching the photoresist layer and selectively applying activator material to the fusible element by electroplating.
Claim 5
Dependent Claim
80 words
A fuse comprising a fusible element mounted in a housing between two end terminals, the fusible element having the shape of a thin wire and including activator means, the activator means consisting of a plurality of small activator cores spaced apart on the fusible wire such that the axial position of the fusible element does not appreciably affect the limiting current of the fuse, wherein the fusible wire of the fusible element is wound about a core of insulating fibres.
Claim 6
Dependent Claim
80 words
A fuse comprising a fusible element mounted in a housing between two end terminals, the fusible element having the shape of a thin wire and including activator means, the activator means consisting of a plurality of small activator cores spaced apart on the fusible wire such that the axial position of the fusible element does not appreciably affect the limiting current of the fuse, wherein the fusible wire of the fusible element is wound about a core of insulating fibres.
References Cited (Backward Citations)
US1473284A
Cited
GB777125A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |