US3701069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric cartridge fuse
Assignee: GOLUD INC A DE CORP
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Filing: 1971-05-13
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Granted: 1972-10-24
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Expires: 1991-05-13
Abstract
Abstract An electric cartridge fuse includes a tubular main casing and a tubular sub-casing inside of the main casing. The latter is closed at least one one side thereby by an additional cover means resting against an axially outer edge of the sub-casing and held in position by a radially outwardly projecting bulge formed in the fusible element of the fuse and engaging the cover means adjacent the center thereof. Further disclosed are other applications of the fusible element bulge concept for positioning partitions in electric cartridge fuses.
Inventors
- 👤 Richard A Belcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:52
CPC Classifications
H; H01; H01H; H01H85/00; H01H85/02; H01H85/04; H01H85/041; H01H85/044; H01H85/045; H01H85/0458
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
267 words
An electric cartridge fuse including a. a tubular main casing; b. a pair of terminal elements arranged at the ends of said main casing and closing said main casing; c. fusible element means inside said main casing conductively interconnecting said pair of terminal elements; said fusible element means including a major fault current interrupting portion in ribbon form and an overload current interrupting portion; d. a body of pulverulent arc-quenching filler inside said main casing embedding said major fault current interrupting portion of said fusible element means; e. a tubular sub-casing inside said main casing housing said overload current interrupting portion of said fusible element means and separating said overload current interrupting portion of said fusible element means from said arc-quenching filler; f. perforated cover means at least at one of the end surfaces of said sub-casing closing said sub-casing and allowing passage of said fault current interrupting portion of said fusible element means; and g. fastener means abutting against said cover means for maintaining said cover means in position, said fastener means including a radially outwardly projecting mound-like bulge formed in said fault current interrupting portion of said fusible element means by transversely displaced metal thereof, said transversely displaced metal forming said mound-like bulge being unsevered at any point or points thereof from the fault current interrupting portIon of said fusible element, thus avoiding gap formation between said mound-like bulge and said fault current interrupting portion of said fusible element, and said mound-like bulge being bounded by a closed curve situated within the plane defined by said fault current interrupting portion of said fusible element means.
Claim 2
Dependent Claim
267 words
An electric cartridge fuse including a. a tubular main casing; b. a pair of terminal elements arranged at the ends of said main casing and closing said main casing; c. fusible element means inside said main casing conductively interconnecting said pair of terminal elements; said fusible element means including a major fault current interrupting portion in ribbon form and an overload current interrupting portion; d. a body of pulverulent arc-quenching filler inside said main casing embedding said major fault current interrupting portion of said fusible element means; e. a tubular sub-casing inside said main casing housing said overload current interrupting portion of said fusible element means and separating said overload current interrupting portion of said fusible element means from said arc-quenching filler; f. perforated cover means at least at one of the end surfaces of said sub-casing closing said sub-casing and allowing passage of said fault current interrupting portion of said fusible element means; and g. fastener means abutting against said cover means for maintaining said cover means in position, said fastener means including a radially outwardly projecting mound-like bulge formed in said fault current interrupting portion of said fusible element means by transversely displaced metal thereof, said transversely displaced metal forming said mound-like bulge being unsevered at any point or points thereof from the fault current interrupting portIon of said fusible element, thus avoiding gap formation between said mound-like bulge and said fault current interrupting portion of said fusible element, and said mound-like bulge being bounded by a closed curve situated within the plane defined by said fault current interrupting portion of said fusible element means.
Claim 3
Dependent Claim
105 words
An electric cartridge fuse as specified in claim 1 wherein a. said sub-casing houses a pair of separable, spring-biased, normally solder-means-restrained contacts, one of said pair of contacts closing one of the end surfaces of said sub-casing; and wherein b. said perforated cover means closes the other of the end surfaces of said sub-casing and abuts on one side thereof against the edge formed by the end of said sub-housing remote from said one of said pair of contacts and abuts on the other side thereof against an external mound-like bulge of said fault current interrupting portion in ribbon form of said fusible element means.
Claim 4
Dependent Claim
65 words
An electric cartridge fuse as specified in claim 1 wherein said perforated cover means is formed by a circular disc of electric insulating material having a straight radially extending slot for the passage of said fault current interrupting portion of said fusible element means, and wherein said outwardly projecting mound-like bulge engages said disc at a point immediately adjacent to the center of said slot.
Claim 5
Dependent Claim
39 words
An electric cartridge fuse as specified in claim 3 wherein the slope of said mound-like bulge is steeper at the side of said bulge adjacent said disc than at the side of said mound-like bulge remote from said disc.
Claim 6
Dependent Claim
142 words
In an electric cartridge fuse the combination of a. a tubular casing of electric insulating material; b. a fusible element in ribbon form arranged inside said casing; c. a plate of insulating material arranged at right angles to said casing and having a slit therein for the passage of said fusible element, said fusible element projecting from one side of said plate through said slit to the other side of said plate; and d. means for positioning said plate relative to said fusible element, said positioning means including a substantially mound-shaped abutment formed by transversely displaced fusible element metal unsevered at any point or points thereof from said fusible element and thus avoiding gap formation between said mound-shaped abutment and said fusible element, and said mound-shaped abutment being bounded by a closed curve situated within the plane defined by said fusible element.
Claim 7
Dependent Claim
142 words
In an electric cartridge fuse the combination of a. a tubular casing of electric insulating material; b. a fusible element in ribbon form arranged inside said casing; c. a plate of insulating material arranged at right angles to said casing and having a slit therein for the passage of said fusible element, said fusible element projecting from one side of said plate through said slit to the other side of said plate; and d. means for positioning said plate relative to said fusible element, said positioning means including a substantially mound-shaped abutment formed by transversely displaced fusible element metal unsevered at any point or points thereof from said fusible element and thus avoiding gap formation between said mound-shaped abutment and said fusible element, and said mound-shaped abutment being bounded by a closed curve situated within the plane defined by said fusible element.
Claim 8
Dependent Claim
16 words
An electric fuse as specified in claim 5 wherein said plate separates spaces containing different media.
Claim 9
Dependent Claim
115 words
An electric cartridge fuse as specified in claim 5 wherein a. said tubular casing is provided with terminal caps on the ends thereof; wherein b. said terminal caps are conductively interconnected by said fusible element; wherein c. said plate has the same diameter as the inner diameter of said casing and subdivides said casing into a pair of compartments; and wherein d. said means for positioning said plate relative to said fusible element include a pair of substantially mound-shaped abutments formed by transversely displaced fusible element metal and arranged to opposite sides of said plate, each of said mound-shaped abutments being bounded by a closed curve situated within the surface defined by said fusible element.
Claim 10
Dependent Claim
119 words
An electric cartridge fuse as specified in claim 5 wherein a. said tubular casing is arranged inside of another tubular casing of electric insulating material, said another casing having a larger inner diameter than the outer diameter of said casing; wherein b. said another casing is provided with terminal caps on the ends thereof and said terminal caps are conductively interconnected by said fusible element; and wherein c. said plate is positioned relative to said fusible element by abutting engagement on one side thereof by one of the rims formed by one of the ends of said casing and is further positioned relative to Said fusible element by engagement on the other side thereof by said substantially mound-shaped abutment.
Claim 11
Dependent Claim
156 words
An electric cartridge fuse as specified in claim 8 wherein a. said casing is closed on each of both ends thereof by one of a pair of plates of insulating material each having substantially the same diameter as the diameter of said casing; wherein b. one of said pair of plates is positioned relative to said fusible element by a pair of substantially mound-shaped abutments formed by transversely displaced fusible element metal each being bounded by a closed curve situated within the surface defined by said fusible element; and wherein c. the other of said pair of plates is in abutting engagement on one side thereof with one of the rims formed by one of the ends of said casing, and is engaged on the other side thereof by a substantially mound-shaped abutment formed by transversely displaced fusible element metal and being bounded by a closed curve situated within the surface defined by said fusible element.
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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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |