Gaslighter equipped with a safety lock

A gaslighter comprising:

• gas storage means having a reentrant space in a top cover;
• a valve communicating with the gas storage for controlling the flow of gas;
• an intermediate casing having a protruding part fitted in the reentrant space of the top cover, said intermediate casing having a cross slot opening passing from an interion surface to an exterior surface thereof, a thumb-latch slidably movable in said cross slot opening, the thumb-latch having a head portion adjacent to the interior surface of said intermediate casings;
• a piezoelectric unit having a movable operating part for generating piezoelectricity, said piezoelectric unit having a top portion and a bottom portion, said bottom portion of said piezoelectric unit being inserted in a hollow interior portion of the protruding part of the intermediate casing and having resilient bias means to resiliently bias said piezoelectric unit outwardly with respect to the hollow interior portion;
• a thumb-pusher fixed to the top of the piezoelectric unit and slidably fitted in the intermediate casing, said thumb-pusher having an outer surface, said outer surface having a longitudinal groove arranged adjacent and perpendiculr to a portion of the cross slot opening of the intermediate casing, the cross slot opening of the intermediate casing and the longitudinal groove of the thumb-pusher being so positioned that when the head portion is displaced to a position in the cross slot opening in alignment with the longitudinal groove the thumb pusher will pass the head portion and move the movable part of the piezoelectric unit against said resilient bias means, and when the thumb-latch is displaced to a different position where the head portion is not aligned with the longitudinal groove the head portion will engage a surface of the thumb-pusher, thereby preventing movement of the thumb-pusher and the movable operating part of the piezoelectric unit;
• and a linkage connecting the valve with the movable operating part of the piezoelectric unit for opening the valve in response to movement of the movable operating part of the piezoelectric unit by the thumb-pusher.