US3710212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disconnector for surge arresters
Assignee: Cooper Industries LLC
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Filing: 1971-07-29
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Granted: 1973-01-09
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Expires: 1991-07-29
Abstract
Abstract A disconnector is attached to and electrically in series with a surge arrester. The disconnector has a breakable shell that is broken by explosion of a cartridge within the shell when excessive current flows across an arcing gap. The disconnector has a top electrode and a bottom electrode with the top electrode connected to the surge arrester and the bottom electrode connectable to a connector wire. An annular electrically conductive elastomer gasket is compressed between the upper and lower electrode to provide a high resistance current path around the arcing gap and also to seal the cartridge from the outside atmosphere.
Inventors
- 👤 J Marek
- 👤 S Kershaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:11
CPC Classifications
H; H01; H01T; H01T1/00; H01T1/14
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
114 words
A disconnector for surge arresters comprising: a breakable insulating housing having an opening; upper and lower electrically conductive electrodes connected to the housing and having respective arcing surfaces spaced apart from each other to form an arcing chamber at least in part within the opening; a cartridge adjacent to one of the arcing surfaces adapted to explode when current through the disconnector exceeds a preselected level to thereby break the housing and separate the electrodes; and an electrically conductive elastomer gasket having a selected electrical resistance compressed between the upper and lower electrode to thereby seal the arcing chamber and cartridge from the atmosphere and provide a high resistance current path between said electrodes.
Claim 2
Dependent Claim
114 words
A disconnector for surge arresters comprising: a breakable insulating housing having an opening; upper and lower electrically conductive electrodes connected to the housing and having respective arcing surfaces spaced apart from each other to form an arcing chamber at least in part within the opening; a cartridge adjacent to one of the arcing surfaces adapted to explode when current through the disconnector exceeds a preselected level to thereby break the housing and separate the electrodes; and an electrically conductive elastomer gasket having a selected electrical resistance compressed between the upper and lower electrode to thereby seal the arcing chamber and cartridge from the atmosphere and provide a high resistance current path between said electrodes.
Claim 3
Dependent Claim
14 words
A disconnector according to claim 1 wherein said elastomer gasket is an annular gasket.
Claim 4
Dependent Claim
13 words
A disconnector according to claim 1 wherein said electrodes are within the opening.
Claim 5
Dependent Claim
30 words
A disconnector according to claim 3 wherein said housing opening has a threaded portion and said upper electrode has a threaded extension adapted to be screwed into said threaded portion.
Claim 6
Dependent Claim
106 words
An electrical disconnector for connection to a surge arrester in an electrical circuit comprising: a breakable insulating housing having an opening therethrough; a first and a second electrical connecting electrode retained adjacent at least part of said opening and each having respective arcing surfaces spaced apart from each other; an electrically conductive elastomer gasket having a selected electrical resistance compressed between the arcing surfaces of the upper and lower electrodes to form a sealed chamber with said electrodes; and a cartridge adjacent said chamber adapted to explode when current through the disconnector exceeds a preselected level to thereby break the housing and open the electrical circuit.
Claim 7
Dependent Claim
106 words
An electrical disconnector for connection to a surge arrester in an electrical circuit comprising: a breakable insulating housing having an opening therethrough; a first and a second electrical connecting electrode retained adjacent at least part of said opening and each having respective arcing surfaces spaced apart from each other; an electrically conductive elastomer gasket having a selected electrical resistance compressed between the arcing surfaces of the upper and lower electrodes to form a sealed chamber with said electrodes; and a cartridge adjacent said chamber adapted to explode when current through the disconnector exceeds a preselected level to thereby break the housing and open the electrical circuit.
Claim 8
Dependent Claim
67 words
A disconnector according to claim 5 wherein said breakable insulating housing opening has an upper portion and a lower portion of smaller diameter with a shoulder at the top of said lower portion and said second conducting electrode is adapted to pass through the lower opening of the insulating housing and has a flange near the upper end thereof adapted to seat upon the insulating housing shoulder.
Claim 9
Dependent Claim
35 words
A disconnector according to claim 6 wherein said breakable insulating housing opening has an upper threaded portion and said first conducting electrode has a threaded extension adapted to be screwed into said upper threaded portion.
Claim 10
Dependent Claim
27 words
A disconnector according to claim 7 wherein said extension is recessed at its lower end to form at least part of the chamber around an annular lip.
Claim 11
Dependent Claim
27 words
A disconnector according to claim 8 wherein said second conducting electrode has a recess adapted to receive the cartridge and wherein said cartridge is in said recess.
Claim 12
Dependent Claim
25 words
A disconnector according to claim 9 wherein said conductive elastomer gasket is annular and is compressed between the annular lip and the lower electrode flange.
Claim 13
Dependent Claim
36 words
A disconnector according to claim 10 wherein said second electrode has a cylindrical extension above the flange, said elastomer gasket surrounds said cylindrical extension, and said recess is at the upper end of said cylindrical extension.
Claim 14
Dependent Claim
27 words
An electrical disconnector according to claim 5 wherein said first electrode extends through one end of the opening and the second electrode extends through the other end.
Claim 15
Dependent Claim
44 words
An electrical disconnector according to claim 12 wherein said opening in the housing is threaded at one end and said first elEctrode has a threaded extension adapted to screw into said threaded portion and is adapted to be electrically connected into the electrical circuit.
Claim 16
Dependent Claim
21 words
An electrical disconnector according to claim 5 wherein said elastomer gasket is annular to form the sealed chamber within the gasket.
References Cited (Backward Citations)
US2548112A
Cited
US3100246A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |