Properties and preparation of ceramic insulators for spark plugs

Silsbee, F. B., Honaman, R. K., Fonseca, E. L., Bleininger, A. V., Staley, H. F.

Report describes in detail the preliminary experiments which were made on the conductivity of spark-plug insulators in order to develop a satisfactory comparative method for testing various spark-plug materials. Materials tested were cements, porcelain, feldspar, and quartz.

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