Steam generating apparatus, namely, steam generators, power-operated vaporizers for household purposes, electric food steamers; cooking appliances, namely, electric griddles, cooking ovens, cooking stoves, electric grills, gas grills, charcoal grills; refrigerating apparatus, namely, refrigerators, refrigerating cabinets; barbecues; ventilation hoods; burners, namely, gas burners, acetylene burners, oil burners for industrial, commercial and domestic use, petrol burners for industrial, commer...