US3815073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical fuse
Assignee: Siemens AG
•
Filing: 1972-10-12
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Granted: 1974-06-04
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Expires: 1992-10-12
Abstract
Abstract A fuse for protecting high voltage circuit elements, particularly capacitor units, the fuse elements including a conductive fuse wire wound in a helical configuration and enclosing thereby a hollow core. In a preferred embodiment, the coiled helix has a length which is approximately half the total length of fuse wire therein.
Inventors
- 👤 F Pollmeier
- 👤 P Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:53
CPC Classifications
H; H01; H01G; H01G2/00; H01G2/14
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
70 words
An electrical fuse apparatus comprising: an elongated portion of conductive fuse material wound in a helical configuration and having terminals associated therewith for electrically connecting said fuse material in an electrical circuit comprising a circuit element to be protected by said fuse, the helix formed by said helically wound fuse material having a coiled length approximately half the length of the total length of said portion of said fuse material.
Claim 2
Dependent Claim
70 words
An electrical fuse apparatus comprising: an elongated portion of conductive fuse material wound in a helical configuration and having terminals associated therewith for electrically connecting said fuse material in an electrical circuit comprising a circuit element to be protected by said fuse, the helix formed by said helically wound fuse material having a coiled length approximately half the length of the total length of said portion of said fuse material.
Claim 3
Dependent Claim
50 words
The fuse of claim 1, further comprising: a carrier bracket made of insulating material and having means for supportively suspending said fuse material, whereby, when said fuse material is suspended on said carrier bracket and immersed in a liquid, the liquid contacts virtually the entire surface of said fuse material.
Claim 4
Dependent Claim
13 words
The fuse of claim 2, said carrier bracket being of a U-shaped configuration.
Claim 5
Dependent Claim
33 words
The fuse of claim 1, further comprising: a rod of insulating material and being insertable into the core of said helically wound fuse material, whereby the mechanical rigidity of said fuse is enhanced.
Claim 6
Dependent Claim
10 words
The fuse of claim 4, said rod being flexibly resilient.
Claim 7
Dependent Claim
32 words
The fuse of claim 1, further comprising a tubular insulating element being suitable to accommodate in its bore said helically wound fuse material, whereby the mechanical rigidity of said fuse is enhanced.
Claim 8
Dependent Claim
12 words
The fuse of claim 6, said tubular insulating element being flexibly resilient.
Claim 9
Dependent Claim
118 words
In an electrical capacitor unit having at least one capacitor element disposed within a housing containing insulating liquid, each capacitor element being connected to an internal fuse having one end thereof connected to the capacitor element, the other end thereof being connected with a bus of the capacitor unit, the fuse including an elongated portion of conductive fuse material, the improvement comprising: the conductive fuse material being wound into a helical configuration and thereby defining a helix having a hollow core, the helix formed by said fuse material having a coiled length approximately half the length of the total length of the fuse material, whereby the mechanical strength and the magnetic blast effect of said fuse is enhanced.
Claim 10
Dependent Claim
118 words
In an electrical capacitor unit having at least one capacitor element disposed within a housing containing insulating liquid, each capacitor element being connected to an internal fuse having one end thereof connected to the capacitor element, the other end thereof being connected with a bus of the capacitor unit, the fuse including an elongated portion of conductive fuse material, the improvement comprising: the conductive fuse material being wound into a helical configuration and thereby defining a helix having a hollow core, the helix formed by said fuse material having a coiled length approximately half the length of the total length of the fuse material, whereby the mechanical strength and the magnetic blast effect of said fuse is enhanced.
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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) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |