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AssigneeSiemens Aktiengesellschaft
InventorsGerhard Lange, Oskar Sippekamp, Gerhard Schwenda
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A surge arrester with a parallel-connected improved spark gap structure has a flanged ring connected to one of the two electrodes of the surge arrester which forms the first electrode of the spark gap structure, an axially aligned insulator disc having recesses therein seated on the flanged ring, and an annular metal contact seated on the opposite side of the insulator ring forming the second electrode of the spark gap structure through the recesses in the insulating ring has the improvements of the metal contact forming the second electrode of the spark gap being an annular cup having a base seated against the insulator ring and a conical wall connected via contact springs with the other electrode of the surge arrester, and the base of the annular cup has projections in registry with the insulator ring recesses extending a distance therein such that the spark gap is formed between the flanged ring and the highest elevation of the projections. The spark gap serves as a back up to a fail-safe device which would normally permanently short the surge arrester to ground after an extended discharge, which spark gap is resistant to conductive deposits being formed thereon.
In a device for protection of circuits against surge voltages having a surge arrester with two electrodes, a flanged ring electrically connected to one of said surge arrester electrodes forming a first electrode of an auxiliary spark gap, an insulating ring seated against and in axial registry with said flanged ring having a plurality of spaced apertures therein, and a conductive spring contact holder connected to the other electrode of said surge arrester and carrying a plurality of spring contacts, the improvement of an annular metal cup forming a second electrode of said auxiliary spark gap, said cup comprising:
Dependencies are inferred from the claim text.