Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication date
Publication of BE418163ApublicationCriticalpatent/BE418163A/fr
C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
C03B27/00—Tempering or quenching glass products
C03B27/012—Tempering or quenching glass products by heat treatment, e.g. for crystallisation; Heat treatment of glass products before tempering by cooling
G—PHYSICS
G05—CONTROLLING; REGULATING
G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
G05D7/00—Control of flow
G05D7/01—Control of flow without auxiliary power
G05D7/0146—Control of flow without auxiliary power the in-line sensing element being a piston or float without flexible member or spring