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Charles Helas
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Individual
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Individual
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Publication of GB190521323ApublicationCriticalpatent/GB190521323A/en
21,323. Helas, C. Oct. 20. Lift valves.-A conical plug c, Fig. 2, is raised from or pressed upon projecting faces a, Fig. 3, of a valve casing b by means of a screw d. A fin g on the plug fits into a groove f in the casing to prevent rotation. [Reference has been directed under Patents Act, 1902, to Specifications No. 1252, A.D. 1870, and No. 8504, A.D. 1897.]
GB190521323D1905-10-201905-10-20An Improvement in Valves for either Steam or Water
ExpiredGB190521323A
(en)