US3611239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-voltage fuse having inner core and outer shell fuse links
Assignee: GOLUD INC A DE CORP
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Filing: 1970-06-05
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Granted: 1971-10-05
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Expires: 1990-06-05
Abstract
Abstract A high-voltage fuse has ribbon fuse links forming a radially inner core of fuse links and has ribbon fuse links forming a radially outer shell of fuse links. The inner core fuse links are provided with long overload current interrupting neck portions positioned substantially midway between the terminal elements of the fuse. The outer shell fuse links are provided with long overload current interrupting neck portions positioned relatively close to one of the terminal elements of the fuse. The long overload current interrupting neck portions of contiguous outer shell fuse links are arranged in staggered relation.
Inventors
- 👤 Frederick J Kozacka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:53
CPC Classifications
H; H01; H01H; H01H85/00; H01H85/02; H01H85/04; H01H85/05; H01H85/055; H01H85/143; H01H85/157
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
199 words
An electric high-voltage fuse including: a. a tubular casing of insulating material; b. a pulverulent arc-quenching filler inside said casing; c. a pair of electroconductive terminal elements closing the ends of said casing; d. a first plurality of ribbon fuse links embedded in said arcquenching filler, conductively interconnecting said pair of terminal elements and arranged in the center region of said casing, each of said first plurality of fuse links having a plurality of serially related relatively short neck portions and a relatively long neck portion positioned substantially midway between said pair of terminal elements; and e. a second plurality of ribbon fuse links embedded in said arcquenching filler, conductively interconnecting said pair of terminal elements, arranged in the peripheral region of said casing and surrounding the constituent fuse links of said first plurality of fuse links, each of said second plurality of fuse links having a plurality of serially related relatively short neck portions and a relatively long neck portion positioned relatively close to one and relatively remote from the other of said pair of terminal elements, and said relatively longneck portion of contiguous fuse links of said second plurality of fuse links being arranged in staggered relation.
Claim 2
Dependent Claim
199 words
An electric high-voltage fuse including: a. a tubular casing of insulating material; b. a pulverulent arc-quenching filler inside said casing; c. a pair of electroconductive terminal elements closing the ends of said casing; d. a first plurality of ribbon fuse links embedded in said arcquenching filler, conductively interconnecting said pair of terminal elements and arranged in the center region of said casing, each of said first plurality of fuse links having a plurality of serially related relatively short neck portions and a relatively long neck portion positioned substantially midway between said pair of terminal elements; and e. a second plurality of ribbon fuse links embedded in said arcquenching filler, conductively interconnecting said pair of terminal elements, arranged in the peripheral region of said casing and surrounding the constituent fuse links of said first plurality of fuse links, each of said second plurality of fuse links having a plurality of serially related relatively short neck portions and a relatively long neck portion positioned relatively close to one and relatively remote from the other of said pair of terminal elements, and said relatively longneck portion of contiguous fuse links of said second plurality of fuse links being arranged in staggered relation.
Claim 3
Dependent Claim
163 words
An electric high-voltage fuse as specified in claim 1 wherein a. said pair of terminal elements is formed by a pair of plugs inserted into the ends of said casing; wherein b. each of said first plurality of fuse links and each of said second plurality of fuse links is straight and has ends bent 90* and arranged in abutting engagement with the axially inner end surfaces of said pair of plugs; wherein c. a plurality of screws projecting with the shanks thereof at right angles into said axially inner end surfaces of said pair of plugs clamp with the heads thereof said ends of each of said first plurality of fuse links and said ends of said second plurality of fuse links against said axially inner end surfaces of said pair of plugs; and wherein d. the heads of each of said plurality of screws and said axially inner end surfaces of said pair of plugs form gaps being filled with solder.
Claim 4
Dependent Claim
36 words
An electric fuse as specified in claim 1 wherein the constituent ribbon fuse links of said first plurality of fuse links and the constituent fuse links of said second plurality of fuse links are angularly displaced.
Claim 5
Dependent Claim
77 words
An electric fuse as specified in claim 1 wherein the constituent ribbon fuse links of said first plurality of fuse links are arranged in a first substantially cylindrical surface having a relatively small diameter, wherein the constituent ribbon fuse links of said second plurality of fuse links are arranged in a second substantially cylindrical surface having a relatively large diameter, and wherein said first surface and said second surface are arranged in coaxial relation to said casing.
Claim 6
Dependent Claim
25 words
An electric fuse as specified in claim 1 wherein said pulverulent arc-quenching filler is quartz sand excluding any pulverulent arc-quenching filler other than quartz sand.
Claim 7
Dependent Claim
59 words
An electric fuse as specified in claim 6 wherein a link-severing overlay of a low fusing point metal is arranged on both ends of said relatively long neck portion of each of said first plurality of ribbon fuse links and on both ends of said relatively long neck portion of each of said second plurality of ribbon fuse links.
Claim 8
Dependent Claim
44 words
An electric fuse as specified in claim 1 wherein the ratio of the number of ribbon fuse links in said first plurality of ribbon fuse links to the number of ribbon fuse links in said second plurality of ribbon fuse links is about 1:2.
Claim 9
Dependent Claim
64 words
An electric fuse as specified in claim 5 wherein said relatively long neck portion of each of said first plurality of rIbbon fuse links and said relatively long neck portion of each of said second plurality of ribbon fuse links is formed by a pair of round parallel-connected wires provided adjacent the ends thereof with a link-severing overlay of a low fusing point metal.
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) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |