US4924203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wire bonded microfuse and method of making
Assignee: Cooper Industries LLC
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Filing: 1988-06-29
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Granted: 1990-05-08
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Expires: 2008-06-29
Abstract
Abstract A microfuse (10) with a ceramic chip (12), thick film pads (14), fusible wire (16), attached to pads (14) without solder or flux, in an insulating enclosure or fuse tube (40). Ferrules (42) are attached to metallized areas (14) with solder (44). Performance and manufacturing of fuse (10) is improved by utilizing a wire bonding technique to improve the quality of the manufacturing process and increase the reliability of the fuse, and to reduce manufacturing cost.
Inventors
- 👤 Leon Gurevich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:54
CPC Classifications
H; H01; H01H; H01H85/00; H01H85/02; H01H85/04; H01H85/041; H01H85/0411; H01H69/00; H01H69/02; H01H85/20; H01H85/201; H01H2069/025; H01H2069/027; H01H85/0013; H01H85/0021; H01H2085/0034; H01H2085/0412; H01H2085/0414; H01H85/003
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
90 words
A fuse subassembly comprising: a flat insulating substrate; a first end of said substrate; a second end of said substrate; a metallized area on said first end and a metallized area on said second end of said substrate; a fusible element attached to said metallized areas in a manner not employing solder or flux; an enclosure, having a first end and a second end, said enclosure surrounding said substrate, metallized area, and fusible element; and, a ferrule attached to each of said metallized area and said ends of said enclosure.
Claim 2
Dependent Claim
90 words
A fuse subassembly comprising: a flat insulating substrate; a first end of said substrate; a second end of said substrate; a metallized area on said first end and a metallized area on said second end of said substrate; a fusible element attached to said metallized areas in a manner not employing solder or flux; an enclosure, having a first end and a second end, said enclosure surrounding said substrate, metallized area, and fusible element; and, a ferrule attached to each of said metallized area and said ends of said enclosure.
Claim 3
Dependent Claim
20 words
A fuse subassembly as in claim 1 wherein said fusible element is attached to said metallized areas using ultrasonic bonding.
Claim 4
Dependent Claim
16 words
A fuse subassembly as in claim 1 wherein said enclosure does not contact said fusible element.
Claim 5
Dependent Claim
25 words
A fuse subassembly as in claim 1 wherein an arc quenching material covers at least a portion of said substrate, metallized areas, and fusible element.
Claim 6
Dependent Claim
13 words
A fuse subassembly as in claim 4 wherein said arcquenching material is ceramic.
Claim 7
Dependent Claim
29 words
A fuse subassembly as in claim 4 wherein an insulating means covers said arc-quenching material wherein said insulating means is located between said arch quenching material and said enclosure.
Claim 8
Dependent Claim
13 words
A fuse subassembly as in claim 6 wherein said insulating means is plastic.
Claim 9
Dependent Claim
19 words
A fuse subassembly as in claim 1 wherein said ferrule is notched to support an end of said substrate.
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) | 1993-05-07 | 1993-11-06 | 1994-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-07 | 1997-11-06 | 1998-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-07 | 2001-11-06 | 2002-05-08 | $7700.00 | Window Closed / Lapsed |