US5027101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sub-miniature fuse
Assignee: SCHURTER HOLDING AG
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Filing: 1990-05-24
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Granted: 1991-06-25
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Expires: 2010-05-24
Abstract
Abstract An electrical component, particularly a fuse for a surface-mount component, is formed by sputtering an aluminum conductor onto a square tube, sleeving the tube into an outer tube, filling the assembly with a room-temperature vulcanizing silicone sealant, cutting the assembly into segments, and metallizing the ends of each segment. In one embodiment, the sleeved tubes are mechanically separated from the surrounding silicone. In another embodiment, the silicone-coated tubes are mechanically separated from the outer tubes. In another embodiment fuses are made by sputtering the conductors onto a thin glass substrate, covering a link portion of the conductors with silicone adhesive, and dicing the substrate.
Inventors
- 👤 Vaughan Morrill, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:48
CPC Classifications
H; H01; H01H; H01H85/00; H01H85/02; H01H85/04; H01H85/041; H01H85/0411; H01H85/046; H01H1/00; H01H1/58; H01H2001/5888; H01H85/0013; H01H85/0021; H01H2085/0034; H01H85/003
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
64 words
An electric fuse comprising a dielectric sheet having a broad face with a length and breadth, the sheet having a thickness much less than either the length or breadth, an electrical conductor on the broad face of the sheet, the conductor including a fusible link, and a dielectric synthetic polymer adhesive over the link, the adhesive bonding to the link and to the sheet.
Claim 2
Dependent Claim
64 words
An electric fuse comprising a dielectric sheet having a broad face with a length and breadth, the sheet having a thickness much less than either the length or breadth, an electrical conductor on the broad face of the sheet, the conductor including a fusible link, and a dielectric synthetic polymer adhesive over the link, the adhesive bonding to the link and to the sheet.
Claim 3
Dependent Claim
71 words
The electric fuse of claim 1 wherein the conductor includes end portions, the fusible link differing from the end portions in at least one of cross-sectional area and composition, the dielectric adhesive covering the link and at least a part of the end portions of the conductor and isolating the link from ambient, the adhesive maintaining isolation of the link area from ambient when the link is exposed to overcurrent conditions.
Claim 4
Dependent Claim
31 words
The fuse of claim 2 wherein the adhesive covers only a part of the end portions of the conductors, exposed parts of the end portions being electrically connected to electrical terminals.
Claim 5
Dependent Claim
12 words
The fuse of claim 1 wherein the adhesive is a silicone elastomer.
Claim 6
Dependent Claim
23 words
The fuse of claim 4 wherein the link is formed of a material selected from the group consisting of aluminum and aluminum alloys.
Claim 7
Dependent Claim
17 words
The fuse of claim 1 wherein the dielectric adhesive is thickest above the center of the link.
Claim 8
Dependent Claim
12 words
The fuse of claim 1 wherein the sheet is made of glass.
Claim 9
Dependent Claim
85 words
An overcurrent protective fuse comprising a conductor including a fusible link part, the conductor being metallized onto a dielectric sheet having a broad face with a length and breadth, the sheet having a thickness much less than either the length or breadth, the conductor being metallized onto the broad face of the dielectric sheet, the fusible link part consisting essentially of a material selected from the group consisting of aluminum and aluminum alloys, and a coating of silicone elastomer in contact with the link part.
Claim 10
Dependent Claim
85 words
An overcurrent protective fuse comprising a conductor including a fusible link part, the conductor being metallized onto a dielectric sheet having a broad face with a length and breadth, the sheet having a thickness much less than either the length or breadth, the conductor being metallized onto the broad face of the dielectric sheet, the fusible link part consisting essentially of a material selected from the group consisting of aluminum and aluminum alloys, and a coating of silicone elastomer in contact with the link part.
Claim 11
Dependent Claim
21 words
The fuse of claim 8 wherein the silicone is an adhesive which adheres both to the sheet and to the link.
Claim 12
Dependent Claim
21 words
The fuse of claim 9 wherein the conductor includes a pair of end portions, the link part joining the end portions.
Claim 13
Dependent Claim
31 words
The fuse of claim 10 wherein at least one of the end portions extends around an end of the sheet to a lower face of the sheet opposite the broad face.
Claim 14
Dependent Claim
47 words
The fuse of claim 10 wherein the end portions of the conductor are at opposite ends of the length of the broad face of the sheet, the link being formed of the same material as the end portions and differing from the end portions in cross-sectional area.
Claim 15
Dependent Claim
28 words
The fuse of claim 12 wherein the breadth of the broad face is greater than its length, the breadth of the broad face being less than 0.1 inch.
Claim 16
Dependent Claim
22 words
The fuse of claim 10 wherein the fuse further includes a lead attached to one of the end portions of the conductor.
Claim 17
Dependent Claim
36 words
The fuse of claim 8 wherein the thickness of the sheet is less than 0.01 inch and the greater of the length and breadth of the broad face of the fuse is less than 0.1 inch.
Claim 18
Dependent Claim
47 words
The fuse of claim 2 wherein the end portions of the conductor are at opposite ends of the length of the broad face of the sheet, the link being formed of the same material as the end portions and differing from the end portions in cross-sectional area.
Claim 19
Dependent Claim
36 words
The fuse of claim 1 wherein the thickness of the sheet is less than 0.01 inch and the greater of the length and breadth of the broad face of the fuse is less than 0.1 inch.
Claim 20
Dependent Claim
49 words
An electric fuse comprising a dielectric substrate, an electrical conductor on the substrate, the conductor including a fusible link, and a dielectric synthetic polymer adhesive over the link, the adhesive bonding to the link and to the substrate, the adhesive being the sole barrier between the link and ambient.
Claim 21
Dependent Claim
49 words
An electric fuse comprising a dielectric substrate, an electrical conductor on the substrate, the conductor including a fusible link, and a dielectric synthetic polymer adhesive over the link, the adhesive bonding to the link and to the substrate, the adhesive being the sole barrier between the link and ambient.
Claim 22
Dependent Claim
88 words
The electric fuse of claim 18 wherein the conductor is metallized onto the substrate, the conductor including end portions, the fusible link differing from the end portions in at least one of cross-sectional area and composition, and wherein the dielectric adhesive is silicone, the dielectric silicone adhesive covering the link and at least a part of the end portions of the conductor and isolating the link from ambient, the dielectric silicone adhesive maintaining isolation of the link area from ambient when the link is exposed to overcurrent conditions.
Claim 23
Dependent Claim
49 words
The electric fuse of claim 19 wherein the substrate comprises a dielectric tube having ends and an outer axial surface between the ends, the conductor being metallized on the outer axial surface of the tube, the fuse having a diameter less than 0.1" and a length less than 0.05".
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-06-24 | 1994-12-24 | 1995-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-24 | 1998-12-24 | 1999-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-24 | 2002-12-24 | 2003-06-25 | $7700.00 | Window Closed / Lapsed |