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US 4,266,260 AGranted
Surge arrester
AssigneeSiemens Aktiengesellschaft
InventorsGerhard Lange, Juergen Boy
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AssigneeSiemens Aktiengesellschaft
InventorsGerhard Lange, Juergen Boy
Estimating the term…
A surge arrester has a gas-filled housing, in which, by means of a tubular insulating body, copper electrodes are positioned opposite one another in a spaced relation, and have a stepped, truncated conical shape. The electrodes, in the region of the active surfaces thereof, are designed with thicker walls than the conical sides in the region of the connection to the insulating body. The surge arrester is characterized in the case of small dimensions by good alternating current loading, surge current loading and life-span characteristics, combined with low response surge voltage and high extinguishing potential. The active surfaces of the copper electrodes are provided with a deep waffeling or honeycombing, or concentric rings, in which an electrode activating substance is anchored, the substance comprising aluminum powder and magnesium oxide. The surge arrester is particularly suitable for protecting communication lines.
In a surge arrester of the type in which a first electrode and a second electrode are sealed gas-tight in opposite ends of a tubular gas-filled insulating body, in which each electrode has a stepped truncate conical shape with an end wall with an end surface spaced from the like end surface of the end wall of the other electrode and the end wall having a thickness greater than that of the side wall, the improvement therein comprising:
Dependencies are inferred from the claim text.