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Joseph Zeitlin
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Individual
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Publication of GB190412529ApublicationCriticalpatent/GB190412529A/en
12,529. Zeitlin, J. June 2. Plug cocks.-In vacuum pumps, passages f, g are formed in a coned plug e fitting in a casing c integral with, or attached to, the cylinder cover b. The plug preferably has one end e<1> squared and mounted in the inner of two square blocks n, o, there being a little play between the plug and the inner block in one lateral direction, and between the inner and outer blocks in a lateral direction at right-angles. Thus, when tightened in the sleeve by a nut q, the plug is practically self-centering and self-adjusting.