Abstract: Its casing (1) comprises two adjacent compartments, leakproof in respect of each other, namely a first compartment situated at the rear, in communication with primary or combustive air inlet ports (1a), in which the entry (7a) of the burner (7) is arranged, and a second compartment containing most of the melting duct (4) and the remainder of the burner (7), in communication with ports for the removal (1b) of the combustion fumes.

Abstract: A portable gas lamp of the type having a cylindrical base acting as a casing for a removable gas cartridge and a cylindrical glass chimney which extends upwardly from the base and surrounds an incandescent mantle, in which there is provided a cylindrical sleeve which surrounds the previously stated parts of the lamp and is movable between a first position where it protectively covers the said glass chimney and a second, lower position in which the glass chimney is uncovered and the sleeve surrounds the base. The sleeve is preferably slidingly supported on a pair of upright posts attached to the base, and means is provided for securing the sleeve at least in its uppermost position where it covers the glass chimney.