Compression tester for internal combustion engines

Claim 1

IN A COMPRESSION TESTER PARTICULARLY ADAPTED TO TEST THE COMPRESSION OF INTERNAL COMBUSTION ENGINES, A FITTING FOR THREADING WITHIN A SPARK PLUG HOLE, A CHECK VALVE IN SAID FITTING POSITIONED IN THE COMBUSTION CHAMBER OF A CYLINDER UPON THREADING SAID FITTING WITHIN A SPARK PLUG HOLE, A FLEXIBLE DRIVE CONDUIT SEALED TO SAID FITTING AND CONDUCTING PRESSURE FROM THE SPAK PLUG HOLE AND PROVIDING THE TORQUE TO THREAD AND SEAL SAID FITTING TO THE SPARK PLUG HOLE BY TURNING MOVEMENT OF SAID CONDUIT, A CONNECTOR SEALED TO THE OPPOSITE END OF SAID FLEXIBLE CONDUIT FROM SAID FITTING AND OPERABLE TO TURN SAID FLEXIBLE CONDUIT AND FITTING UPON TURNING MOVEMENT OF SAID CONNECTOR, A PRESSURE GAUGE INCLUDING A GAUGE HEAD SECURED TO SAID CONNECTOR AND ADAPTED TO BE TURNED BY THE HAND TO THREAD AND SEAL SAID FITTING TO A SPAK PLUG HOLE, SAID FITTING HAVING AN INNER HEAD, A LARGE DIAMETER THREADED PORTION SPACED OUTWARDLY OF SAID HEAD AND A SMALL DIAMETER THREADED PORTION SPACED OUTWARDLY OF SAID LARGE DIAMETER THREADED PORTION, AN O-RING SEPARATING SAID THREADED PORTIONS AND A SECOND O-RING SEPARATING SAID LARGER DIAMETER THREADED PORTION FROM SAID HEAD, WHEREBY SAID FITTING MAY BE SELECTIVELY THREADED IN AND SEALED TO SMALL AND LARGE DIAMETER SPARK PLUG HOLES BY TURNING MOVEMENT OF SAID GAUGE BY THE HAND.