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Fritz Duerr
Joseph Hudler
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Investigating Or Analysing Materials By Optical Means
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Abstract
24,137. D³rr, F., and Hudler, J. Nov. 22. Drawings to Specification. Testing gas.-An incandescent gas burner is connected at a suitable point to the main leading from a gas-generator, for the purpose of continuously indicating, by the intensity of the light emitted, the quality of the gas produced.
GB190524137D1905-11-221905-11-22Improvements in Means for Indicating the Quality of Gas Flowing from Gas-generators.
ExpiredGB190524137A
(en)