US3800262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuse cartridge
Assignee: Lucien Ferraz et Cie SA
•
Filing: 1971-12-28
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Granted: 1974-03-26
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Expires: 1991-12-28
Abstract
Abstract In a fuse cartridge of the kind comprising a tubular body, a pair of heads respectively disposed at the ends of this body to close same and to define therewith a non liquid-tight inner space, and fusible elements which connect the said heads with each other, there is provided within the latter pressure damping means to reduce the pressure peak which is applied to the outer body when the cartridge operates. These means may be in the form of a core and/or a sleeve of a flexible cellular material with closed cells, or of a deformable container filled with a gas under an appropriate pressure, or of calibrated holes which connect the inner space of the cartridge with the outside, the inner ends of such holes being covered by a grid which retains the arc quenching material in which the fusible elements of the cartridge are embedded. Such a cartridge is more particularly adapted for operation within an oil tank.
Inventors
- 👤 J Cinquin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:49
CPC Classifications
H; H01; H01H; H01H85/00; H01H85/02; H01H85/43; H01H85/0078; H01H85/0082; H01H85/0086
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
129 words
A fuse cartridge comprising: an outer tubular body having two open ends, an inner side and an outer side; a pair of terminal heads, each mounted at one end of said outer body to define therewith an inner space, with said body insulating electrically said heads from each other; fusible elements connecting said heads with each other within said inner space; a mass of arc quenching material in which said fusible elements are embedded within said inner space; and at least one cellular mass of a flexible material with closed cells also disposed within said inner space to damp the pressure wave which appears when said cartridge operates, said cellular mass being separated from said fusible elements by at least a portion of said mass of arc quenching material.
Claim 2
Dependent Claim
129 words
A fuse cartridge comprising: an outer tubular body having two open ends, an inner side and an outer side; a pair of terminal heads, each mounted at one end of said outer body to define therewith an inner space, with said body insulating electrically said heads from each other; fusible elements connecting said heads with each other within said inner space; a mass of arc quenching material in which said fusible elements are embedded within said inner space; and at least one cellular mass of a flexible material with closed cells also disposed within said inner space to damp the pressure wave which appears when said cartridge operates, said cellular mass being separated from said fusible elements by at least a portion of said mass of arc quenching material.
Claim 3
Dependent Claim
45 words
In a fuse cartridge as claimed in claim 1, said cellular mass being in the form of a substantially cylindrical core disposed substantially axially of said body, with said mass of arc quenching material and said fusible elements embedded therein being situated around said core.
Claim 4
Dependent Claim
46 words
In a fuse cartridge as claimed in claim 1, said cellular mass being in the form of a sleeve applied against the inner side of said outer body, with said mass of arc quenching material and said fusible elements embedded therein, being disposed within said sleeve.
Claim 5
Dependent Claim
75 words
In a fuse cartridge as claimed in claim 1, a first cellular mass in the form of a substantially cylindrical core disposed substantially axially of said body, a second cellular mass in the form of a sleeve applied against the inner side of said outer body and defining with said core an annular intermediate space, with said mass of arc quenching material and said fusible elements embedded therein being disposed in said annular intermediate space.
Claim 6
Dependent Claim
60 words
In a fuse cartridge as claimed in claim 4, said arc quenching material being granular; said heads having calibrated holes to form a communication between said intermediate annular space and the outside, said holes having an inner end and an outer end; and grids covering the inner ends of said holes to prevent said arc quenching material from escaping therethrough.
Claim 7
Dependent Claim
61 words
In a fuse cartridge as claimed in claim 1, said arc quenching material being granular; said heads having calibrated holes to form a communication between said inner space and the outside, with said holes having an inner end and an outer end; and grids covering the inner ends of said holes to prevent said granular arc quenching material from escaping therethrough.
Claim 8
Dependent Claim
128 words
A fuse cartridge comprising: an outer tubular body having two open ends, an inner side and an outer side; a pair of terminal heads, each mounted at one end of said outer body to define therewith an inner space, with said body insulating electrically said heads from each other; fusible elements connecting said heads with each other within said inner space; and at least one pressure contractable means disposed within said inner space to damp the pressure wave which appears when said cartridge operates; said contractable member being formed of a mass of a flexible cellular material with closed cells; and said mass being in the form of a sleeve applied against the inner side of said outer body, with said fusible elements being spaced from said sleeve.
Claim 9
Dependent Claim
128 words
A fuse cartridge comprising: an outer tubular body having two open ends, an inner side and an outer side; a pair of terminal heads, each mounted at one end of said outer body to define therewith an inner space, with said body insulating electrically said heads from each other; fusible elements connecting said heads with each other within said inner space; and at least one pressure contractable means disposed within said inner space to damp the pressure wave which appears when said cartridge operates; said contractable member being formed of a mass of a flexible cellular material with closed cells; and said mass being in the form of a sleeve applied against the inner side of said outer body, with said fusible elements being spaced from said sleeve.
Claim 10
Dependent Claim
174 words
A fuse cartridge comprising: an outer tubular body having two open ends, and an inner side and an outer side; a pair of terminal heads, each mounted at one end of said outer body to define therewith an inner space, with said body insulating electrically said heads from each other; fusible elements connecting said heads with each other within said inner space; and at least one pressure contractable means disposed within said inner space to damp the pressure wave which appears when said cartridge operates; a substantially first pressure contractable member in the form of a cylindrical core made of a flexible cellular material with closed cells, said core being disposed axially of said body between said heads, with said fusible elements being situated around said core while being spaced therefrom; and a second pressure contractable member in the form of a sleeve also made of a flexible cellular material with closed cells, said sleeve being applied against the inner side of said outer body with said fusible elements being spaced from said sleeve.
Claim 11
Dependent Claim
174 words
A fuse cartridge comprising: an outer tubular body having two open ends, and an inner side and an outer side; a pair of terminal heads, each mounted at one end of said outer body to define therewith an inner space, with said body insulating electrically said heads from each other; fusible elements connecting said heads with each other within said inner space; and at least one pressure contractable means disposed within said inner space to damp the pressure wave which appears when said cartridge operates; a substantially first pressure contractable member in the form of a cylindrical core made of a flexible cellular material with closed cells, said core being disposed axially of said body between said heads, with said fusible elements being situated around said core while being spaced therefrom; and a second pressure contractable member in the form of a sleeve also made of a flexible cellular material with closed cells, said sleeve being applied against the inner side of said outer body with said fusible elements being spaced from said sleeve.
Claim 12
Dependent Claim
29 words
In a fuse cartridge as claimed in claim 8, a mass of a granular arc quenching material disposed between said core aNd said sleeve to embed said fusible elements.
Claim 13
Dependent Claim
55 words
In a fuse cartridge as claimed in claim 9, calibrated holes provided in said heads to form a communication between said inner space and the outside, said holes having an inner end and an outer end ; and grids covering the inner ends of said holes to prevent said arc quenching material from escaping therethrough.
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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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |