Patent US3916259A successfully refreshed from Google Patents.
US3916259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuse holder assembly
Assignee: Kuhlman Corp
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Filing: 1974-04-08
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Granted: 1975-10-28
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Expires: 1994-04-08
Abstract
Abstract A fuse holder assembly which is particularly adapted to be utilized in conjunction with the protection system for the primary side of an oil-filled transformer assembly, wherein the fuse holder is mounted on a plate, the plate being supported on the face of the transformer casing. The fuse holder extends from the plate through an aperture in the transformer housing to support the fusing elements below the level of the cooling liquid within the transformer housing. The fusing elements are a current limiting fuse and a weaklink fuse which are mechanically supported by the fuseholder and which can both be withdrawn from the transformer casing with the fuseholder, to permit inspection and replacement.
Inventors
- 👤 William H Russell
- 👤 Peter Mayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:59
CPC Classifications
H; H01; H01H; H01H85/00; H01H85/54; H01F; H01F27/00; H01F27/40; H01F27/402; H01F27/404; H01F27/406
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
275 words
In a transformer assembly having a housing having a line terminal, a winding assembly supported in the housing and having a primary winding terminal, and a cooling liquid within the housing for cooling the winding, the combination of means defining a separate fuse assembly accepting opening in said housing above the level of the cooling liquid spaced from the line terminal, means removably attachable to said housing for closing said opening, a fuse holder member, first securing means on said fuse holder for detachably securing thereon a current limiting fuse, second securing means for removably supporting a separate weaklink fuse on the combination of said fuse holder member and the current limiting fuse, said first and second securing means permitting separate replacement of the current limiting fuse and of the weaklink fuse, support and guide means rigidly supported in said housing in a fixed position and adjacent said opening, said fuse holder member and said support and guide means supporting the current limiting and the weaklink fuses below the level of and immersed in the cooling liquid, means for detachably electrically interconnecting the current limiting and the weaklink fuses, means for permitting the withdrawal of said fuse holder member including the current limiting and weaklink fuses from the housing through the opening therein, and means including said support and guide means for guiding said fuse holder member including the separate current limiting and weaklink fuses during the withdrawal, reinsertion and use thereof, said means for permitting the withdrawal of said fuse holder member comprising an eye on said fuse holder engageable by a hotstick only after said means for closing said opening has been removed.
Claim 2
Dependent Claim
275 words
In a transformer assembly having a housing having a line terminal, a winding assembly supported in the housing and having a primary winding terminal, and a cooling liquid within the housing for cooling the winding, the combination of means defining a separate fuse assembly accepting opening in said housing above the level of the cooling liquid spaced from the line terminal, means removably attachable to said housing for closing said opening, a fuse holder member, first securing means on said fuse holder for detachably securing thereon a current limiting fuse, second securing means for removably supporting a separate weaklink fuse on the combination of said fuse holder member and the current limiting fuse, said first and second securing means permitting separate replacement of the current limiting fuse and of the weaklink fuse, support and guide means rigidly supported in said housing in a fixed position and adjacent said opening, said fuse holder member and said support and guide means supporting the current limiting and the weaklink fuses below the level of and immersed in the cooling liquid, means for detachably electrically interconnecting the current limiting and the weaklink fuses, means for permitting the withdrawal of said fuse holder member including the current limiting and weaklink fuses from the housing through the opening therein, and means including said support and guide means for guiding said fuse holder member including the separate current limiting and weaklink fuses during the withdrawal, reinsertion and use thereof, said means for permitting the withdrawal of said fuse holder member comprising an eye on said fuse holder engageable by a hotstick only after said means for closing said opening has been removed.
Claim 3
Dependent Claim
67 words
The combination of claim 1 further including connector means for connecting the current limiting fuse to one of the transformer terminals, and connector means for connecting the weaklink fuse to the other one of the transformer terminals, and in which both of said connector means are quick detachable connector means for automatically effecting detachment when said fuse holder member is withdrawn from said support and guide means.
Claim 4
Dependent Claim
31 words
The combination of claim 2 further including means for insuring re-engagement of said quick detachable connector means upon the replacing of said fuse holder member in said support and guide means.
Claim 5
Dependent Claim
22 words
The combination of claim 3 in which said means for insuring re-engagement includes said eye and said means for closing said opening.
Claim 6
Dependent Claim
263 words
In a transformer assembly having a housing having a line terMinal, a winding assembly supported in the housing and having a primary winding terminal, and a cooling liquid within the housing for cooling the winding, the combination of means defining a separate fuse assembly accepting opening in said housing above the level of the cooling liquid spaced from the line terminal, means removably attachable to said housing for closing said opening, a fuse holder member, first securing means on said fuse holder for detachably securing thereon a currect limiting fuse, second securing means for removably supporting a separate weaklink fuse on the combination of said fuse holder member and the current limiting fuse, said first and second securing means permitting separate replacement of the current limiting fuse and of the weaklink fuse, support and guide means rigidly supported in said housing in a fixed position, said fuse holder member and said support and guide means supporting the current limiting and the weaklink fuses below the level of and immersed in the cooling liquid, means for detachably electrically interconnecting the current limiting and the weaklink fuses, means for permitting the withdrawal of said fuse holder member including the separate current limiting and weaklink fuses from the housing through the opening therein, and means including said support and guide means for guiding said fuse holder member including the current limiting and weaklink fuses during the withdrawal, reinsertion and use thereof, said support and guide means comprising a rigid tubular insulative member supported by the housing, and said fuse holder being insertable in said tubular member.
Claim 7
Dependent Claim
263 words
In a transformer assembly having a housing having a line terMinal, a winding assembly supported in the housing and having a primary winding terminal, and a cooling liquid within the housing for cooling the winding, the combination of means defining a separate fuse assembly accepting opening in said housing above the level of the cooling liquid spaced from the line terminal, means removably attachable to said housing for closing said opening, a fuse holder member, first securing means on said fuse holder for detachably securing thereon a currect limiting fuse, second securing means for removably supporting a separate weaklink fuse on the combination of said fuse holder member and the current limiting fuse, said first and second securing means permitting separate replacement of the current limiting fuse and of the weaklink fuse, support and guide means rigidly supported in said housing in a fixed position, said fuse holder member and said support and guide means supporting the current limiting and the weaklink fuses below the level of and immersed in the cooling liquid, means for detachably electrically interconnecting the current limiting and the weaklink fuses, means for permitting the withdrawal of said fuse holder member including the separate current limiting and weaklink fuses from the housing through the opening therein, and means including said support and guide means for guiding said fuse holder member including the current limiting and weaklink fuses during the withdrawal, reinsertion and use thereof, said support and guide means comprising a rigid tubular insulative member supported by the housing, and said fuse holder being insertable in said tubular member.
Claim 8
Dependent Claim
41 words
The combination of claim 5 in which said fuse holder has a tubular portion for sheathing a portion of the current limiting fuse and contact means within said tubular portion for removably securing one of the fuses within said tubular portion.
Claim 9
Dependent Claim
270 words
In a transformer assembly having a housing having a line terminal, a winding assembly supported in the housing and having a primary winding terminal, and a cooling liquid within the housing for cooling the winding, the combination of means defining a separate fuse assembly accepting opening in said housing above the level of the cooling liquid spaced from the line terminal, means removably attachable to said housing for closing said opening, a current limiting fuse, a fuse holder member, first securing means on said fuse holder for detachably securing thereon said current limiting fuse, a weaklink fuse, second securing means for removably supporting said separate weaklink fuse on the combination of said fuse holder member and said current limiting fuse, said first and second securing means permitting separate replacement of said current limiting fuse and of said weaklink fuse, support and guide means rigidly supported in said housing in a fixed position, said fuse holder member and said support and guide means supporting said current limiting and said weaklink fuses below the level of and immersed in the cooling liquid, means for detachably electrically interconnecting said current limiting and said weaklink fuses, means for permitting the withdrawal of said fuse holder member including said separate current limiting and weaklink fuses from the housing through the opening therein, and means including said support and guide means for guiding said fuse holder member including said current limiting and weaklink fuses during the withdrawal, reinsertion and use thereof, said support and guide means comprising a rigid tubular insulative member supported by the housing, and said fuse holder being insertable in said tubular member.
Claim 10
Dependent Claim
270 words
In a transformer assembly having a housing having a line terminal, a winding assembly supported in the housing and having a primary winding terminal, and a cooling liquid within the housing for cooling the winding, the combination of means defining a separate fuse assembly accepting opening in said housing above the level of the cooling liquid spaced from the line terminal, means removably attachable to said housing for closing said opening, a current limiting fuse, a fuse holder member, first securing means on said fuse holder for detachably securing thereon said current limiting fuse, a weaklink fuse, second securing means for removably supporting said separate weaklink fuse on the combination of said fuse holder member and said current limiting fuse, said first and second securing means permitting separate replacement of said current limiting fuse and of said weaklink fuse, support and guide means rigidly supported in said housing in a fixed position, said fuse holder member and said support and guide means supporting said current limiting and said weaklink fuses below the level of and immersed in the cooling liquid, means for detachably electrically interconnecting said current limiting and said weaklink fuses, means for permitting the withdrawal of said fuse holder member including said separate current limiting and weaklink fuses from the housing through the opening therein, and means including said support and guide means for guiding said fuse holder member including said current limiting and weaklink fuses during the withdrawal, reinsertion and use thereof, said support and guide means comprising a rigid tubular insulative member supported by the housing, and said fuse holder being insertable in said tubular member.
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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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |