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Publication of FR622520ApublicationCriticalpatent/FR622520A/fr
F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
F23L13/00—Construction of valves or dampers for controlling air supply or draught
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FR622520D1926-10-051926-10-05Dispositif pour isoler des chaudières, fours et appareils similaires de la cheminée
ExpiredFR622520A
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