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| Number | Title | Issue Date |
| 5113306 | Non-fragmenting arrester with staged pressure relief mechanism A non-fragmenting surge arrester with a staged pressure relief mechanism includes a liner with outlets formed in the walls thereof, a gas expansion chamber within the liner and a housing having weakened-wall regions adjacent to the outlets in the liner. I... | 05/12/1992 |
| 5059753 | SF6 puffer recloser A distribution class recloser comprises puffer type, compressed-gas circuit interrupters and a spring stored energy operating mechanism. The interrupter includes a single pair of elongated and axially aligned contacts, one of which is moveable and include... | 10/22/1991 |
| 4930039 | Fail-safe surge arrester A fail-safe, non-fragmenting surge arrester includes a liner having outlets formed in the walls thereof for venting ionized gases generated within the liner by internal arcing. The vented ionized gas forms a lower impedance path for the current which is t... | 05/29/1990 |
