Gas valve service boxes which are ventilated and offer chimney-action for escaping gas

Claim 1

IN A VALVE BOX OF THE CHARACTER DESCRIBED, A PIPE LEADING DOWNWARDLY FROM SUBSTANTIALLY GROUND LEVEL TO A SUNKEN GAS VALVE HAVING AN UPRIGHT FORMATION WHICH IS TO BE TURNED TO OPEN AND SHUT SAID VALVE BY USE OF A LONG-SHANKED WRENCH TO BE INSERTED THROUGH SAID PIPE, A COLLAR MEMBER AT ITS UPPER END OF SAID PIPE; SAID COLLAR MEMBER AT ITS UPPER END HAVING AN OUTWARD FLANGE AROUND IT WHICH IS AN UPRIGHT ANNULAR CHANNEL HAVING AN OUTER RING WALL AND AN INNER RING WALL AND A CLOSURE LID HAVING A PLURALITY OF FEET EXTENDING DOWNWARDLY THEREFROM AND RESTING IN SAID CHANNEL; SAID LID BEING POSITIONED WITHIN SAID OUTER RING WALL AND SUBSTANTIALLY FILLING SAID OUTER RING; THE UNDER SURFACE OF SAID LID BEING SPACED FROM SAID LOWER RING WALL; THE UPPER SURFACE OF SAID LID BEING SUBSTANTIALLY FLUSH WITH THE UPPER RING SURFACE OF SAID OUTER RING WALL; SAID LID HAVING OPENINGS IN ITS PERIPHERY WHICH MAKE THE INTERIOR OF THE PIPE COMMUNICATIVE WITH THE ATMOSPHERE.