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James Caldwell Anderson
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15,120. Anderson, J. C. July 8. Attaching glass to metal. - Sparking plugs for gas engines are made by fusing under pressure a glass or similar insulating- sleeve c, Fig. 4, to the conducting-core F and to a steel casing A, and then cutting a thread L and hexagon head J on the casing and a thread on the core. Fig. 2 shows the parts assembled previous to heating, with mica washers H between the glass 0 and dies G.
GB190315120D1903-07-081903-07-08Improvements in Sparking Plugs for Gas Engines.
ExpiredGB190315120A
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