Gas meter change-over fitting

Claim 1

A GAS METER CHANGE-OVER FITTING OF THE CHARACTER DESCRIBED AND DESIGNED FOR CONNECTION IN A SERVICE LINE LEADING FROM THE OUTLET OF A GAS METER, SAID FITTING COMPRISING A T HAVING FIRST AND SECOND ALIGNED INLET LEGS PRESENTING A COMMON CYLINDRICAL BORE THERETHROUGH, AND A MEDIAL OUTLET LEG PRESENTING A LATERAL CYLINDRICAL BORE INTERSECTING THE COMMON BORE, SAID FIRST INLET LEG BEING ADAPTED FOR CONNECTION TO THE METER OUTLET, SAID OUTLET LEG BEING ADAPTED FOR CONNECTION TO A PORTION OF THE SERVICE LINE LEADING TO A SERVICE OUTLET, A GENERALLY CYLINDRICAL VALVE PLUT SLIDABLY DISPOSED IN SAID COMMON BORE AND MOVABLE BETWEEN AN INOPERATIVE POSITION WHEREIN IT IS DISPOSED IN AND SEALS OFF THE SECOND INLET LEG THUS ESTABLISHING COMMUNICATION BETWEEN THE FIRST INLET LEG AND THE OUTLET LEG, AND AN OPERATIVE POSITION WHEREIN IT IS DISPOSED IN AND SEALS OFF THE FIRST INLET LEG THUS ESTABLISHING COMMUNICATION BETWEEN THE SECOND INLET LEG AND THE OUTLET LEG, A GUIDE CAP REMOVABLY RECEIVED OVER THE OUTER END OF THE SECOND INLET LEG, AN OPERATING ROD PROJECTING THROUGH AND SLIDABLE IN SAID GUIDE CAP, THE INNER END OF SAID OPERATING ROD BEING THREADED, SAID VALVE PLUG BEING FORMED WITH A THREADED SOCKET THEREIN FOR REMOVABLE RECEPTION OF THE THREADED END OF THE OPERATING ROD, AND DETENT MEANS DISPOSED WITHIN SAID COMMON CYLINDRICAL BORE AND EFFECTIVE BETWEEN THE WALL OF SAID LATTER BORE AND THE VALVE PLUG TO YIELDINGLY MAINTAIN THE VALVE PLUG IN ITS INOPERATIVE POSITION WITHIN THE SECOND INLET LEG AND PREVENT ROTATION OF THE VALVE PLUG DURING THREADED RECEPTION AND REMOVAL OF THE OPERATING ROD IN AND OUT OF SAID THREADED SOCKET, AND MEANS FOR INTRODUCING GAS UNDER PRESSURE TO THE INTERIOR OF SAID GUIDE CAP.