Patent US3569786A successfully refreshed from Google Patents.
US3569786A
Expired / Lapsed
US
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High voltage arrester
Assignee: Sankosha Co Ltd
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Filing: 1969-01-13
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Granted: 1971-03-09
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Expires: 1989-01-13
Abstract
Abstract A safety device for safeguarding communications equipment and other electrical machines and instruments when an abnormal voltage is impressed on a system of lines lightening or other phenomena. The safety device comprises two arresters of different capacities for withstanding discharge contained in an arrester casing as a unit and connected in parallel between a line and ground whereby the safety device can cope with a wide range of abnormal voltages.
Inventors
- 👤 Takashi Kunugi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:01
CPC Classifications
H; H01; H01T; H01T4/00; H01T4/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
260 words
A safety device comprising an elongate metal casing adapted to provide a ground connection, said casing being closed at one end and open at the other; a carbon arrester within said casing and electrically insulated therefrom, a conductive spring located intermediate the closed end of said casing and one electrode of said carbon arrester to provide an electrical connection therebetween; a gas-filled arrester positioned within said casing adjacent the open end thereof, said gas-filled arrester including a pair of electrodes secured to the opposite open ends of an insulating tube, a ground connection conductor in contact with one of said electrodes of the gas-filled arrester remote from said open end of said casing, an insulating plate placed against said ground connection conductOr, and a channel-shaped conductive member having its one limb bearing against said insulating plate and its other limb bearing against the other of said electrodes to hold the insulating plate, the ground connection conductor and the gas filled arrester together integrally in abutting relationship, said conductive member being in electrical contact with the other electrode of the carbon arrester and being electrically insulated from the casing, said ground connection conductor having a pair of limbs extending in a direction away from said insulating plate and flaring out to resiliently bear against the diametrically opposite walls of said casing, whereby said both arresters are resiliently held in place within said casing and said conductor is in electrical contact with said casing, said conductive member being adapted to be electrically connected with an electrical line or apparatus to be protected.
Claim 2
Dependent Claim
260 words
A safety device comprising an elongate metal casing adapted to provide a ground connection, said casing being closed at one end and open at the other; a carbon arrester within said casing and electrically insulated therefrom, a conductive spring located intermediate the closed end of said casing and one electrode of said carbon arrester to provide an electrical connection therebetween; a gas-filled arrester positioned within said casing adjacent the open end thereof, said gas-filled arrester including a pair of electrodes secured to the opposite open ends of an insulating tube, a ground connection conductor in contact with one of said electrodes of the gas-filled arrester remote from said open end of said casing, an insulating plate placed against said ground connection conductOr, and a channel-shaped conductive member having its one limb bearing against said insulating plate and its other limb bearing against the other of said electrodes to hold the insulating plate, the ground connection conductor and the gas filled arrester together integrally in abutting relationship, said conductive member being in electrical contact with the other electrode of the carbon arrester and being electrically insulated from the casing, said ground connection conductor having a pair of limbs extending in a direction away from said insulating plate and flaring out to resiliently bear against the diametrically opposite walls of said casing, whereby said both arresters are resiliently held in place within said casing and said conductor is in electrical contact with said casing, said conductive member being adapted to be electrically connected with an electrical line or apparatus to be protected.
References Cited (Backward Citations)
US2728016A
Cited
US2789254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |