Means for locking a screw-threaded connection between two complementary screw-threaded members

Claim 1

MEANS FOR LOCKING A SCREW-THREADED CONNECTION BETWEEN A FIRST AND SECOND MEMBER HAVING COMPLEMENTARY SCREW THREADS, THE FIRST MEMBER HAVING A SCREW THREADED PASSAGE EXTENDING AXIALLY THERETHROUGH AND HAVING AN ANNULAR CONTACT SURFACE OF GREATER EXTERNAL DIAMETER THAN SAID SCREW-THREADED PASSAGE, AND SAID SECOND MEMBER BEING CONTACTABLE WITH SAID ANNULAR CONTACT SURFACE, SAID MEANS COMPRISING A SCREW-THREADED SPINDLE IN SAID PASSAGE AND HAVING SCREW-THREADED ENGAGEMENT SOLELY WITH SAID FIRST MEMBER, AN ABUTMENT ON SAID SPINDLE, MEANS TO TURN SAID SPINDLE TO FORCE SAID ABUTMENT INTO FRICTIONAL ENGAGEMENT WITH THE SECOND MEMBER TO PREVENT ROTATION THEREOF RELATIVE TO THE FIRST MEMBER, THE COMPLEMENTARY SCREW THREADS OF SAID PASSAGE AND SPINDLE BEING OF GREATER PITCH THAN THE COMPLEMENTARY SCREW THREADS BETWEEN THE SAID FIRST AND SAID MEMBERS, ATTEMPTED UNSCREWING OF SAID FIRST MEMBER FROM SAID SECOND MEMBER WHILE SAID ABUTMENT IS IN FRICTIONAL ENGAGEMENT WITH SAID SECOND MEMBER AND THIS ANNULAR CONTACT SURFACE IS IN CONTACT WITH SAID SECOND MEMBER SO INCREASING THE PRESSURE BETWEEN SAID COMPLEMENTARY SCREW THREADS AS TO PREVENT EFFECTIVE UNSCREWING OF SAID FIRST MEMBER.