✦ LIBER ✦

Abrasives: Frank J. Katz (U. S. Geological Survey).—Emery and Corundum

Publisher: Elsevier Science
Year: 1918
Tongue: English
Weight: 66 KB
Volume: 186
Category: Article
ISSN: 0016-0032
DOI: 10.1016/s0016-0032(18)90132-8

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✦ Synopsis

Nov.d918.]

CURRENT TOPICS. 647 lo~er non-conducting oxide, and closes the puncture holes, repairs .or reseals the film.

A number of such cells, depending on the voltage of the circuit, are piled up on top of each other with a spark-gap in series. The need of this spark-gap in series with the attester is the only still remaining undesirable feature which the oxide film arrester shares with the aluminum cell arrester, the multi-gap arrester, and other types.

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