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US1896092A
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Apparatus for mixing gases
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GB374737A
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Means for mixing two gases in definite proportions
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US1879940A
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Method of supplying gases to welding torches and the like
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US1874019A
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Safety device for gas conduits
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GB342175A
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An improved method of supplying gases to welding torches and the like
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GB334129A
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Improved apparatus for protecting gas mains or the like from the effects of a back fire
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GB199300A
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A method of and device for mixing gases under pressure
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US1619948A
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Device for proportionate feeding of gases
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GB151785A
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Method of and apparatus for mixing a high pressure gas and a low pressure gas for welding blowpipe burners and the like
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