Copy fitting device

Claim 1

IN A DEVICE WHICH HAS THE GENERAL FORM OF A PAIR OF PROPORTIONAL DIVIDERS INCLUDING (1) A FIRST LEG MEMBER HAVING ENDS OF A SUBSTANTIALLY POINTED NATURE AND BEING CHARACTERIZED BY A THROUGH-GOING CENTRAL AND LONGITUDINAL SLOT, AND (2) A SECOND LEG MEMBER HAVING ENDS OF A SUBSTANTIALLY POINTED NATURE AND BEING CHARACTERIZED BY A THROUGH-GOING CENTRAL AND LONGITUDINAL SLOT AND BEING OF ESSENTIALLY THE SAME LENGTH AS SAID FIRST LEG MEMBER, AN IMPROVED PIVOT ASSEMBLY JOINING SAID FIRST AND SECOND LEG MEMBERS, SAID PIVOT ASSEMBLY COMPRISING (I) AN UPPER PIECE IN SLIDING CONTACT WITH SAID FIRST LEG MEMBER ON A SURFACE THEREOF DISTANT FROM SAID SECOND LEG MEMBER ON A A LOWER PIECE IN SLIDING CONTACT WITH SAID SECOND LEG MEMBER ON A SURFACE THEREOF DISTANT FROM SAID FIRST LEG MEMBER, (III) A SHAFT PASSING THROUGH AND EXTENDING IN EITHER DIRECTION BEYOND SAID PIVOT ASSEMBLY UPPER PIECE, THE CENTRAL SLOT IN SAID FIRST LEG MEMBER, THE CENTRAL SLOT IN SAID SECOND LEG MEMBER, AND SAID PIVOT ASSEMBLY LOWER PIECE, SAID SHAFT HAVING A CLOSE SLIDING FIT LONGITUDINALLY IN SAID PIVOT ASSEMBLY UPPER AND LOWER PIECES, A CLOSE TURNING FIT IN SAID PIVOT ASSEMBLY LOWER PIECE AND A FREE SLIDING FIT DIAMETRALLY WITHIN THE CENTRAL SLOTS OF SAID FIRST AND SECOND LEG MEMBERS, AND HAVING FURTHER A NON-ROUND HEAD ON ITS UPPER END ACTING WITHIN SAID PIVOT ASSEMBLY UPPER PIECE TO PREVENT ROTATION OF THE SHAFT WITH RESPECT THERETO, AND HAVING STILL FURTHER THREADS ON ITS LOWER END, (IV) A LOCKING LEVER IS PIVOTED ENGAGEMENT WITH THE HEAD OF SAID PIVOT ASSEMBLY SHAFT AND IN CAMMING ENGAGEMENT WITH THE UPPER SURFACE OF SAID PIVOT ASSEMBLY UPPER PIECE, THIS ENGAGEMENT BEING OF A NATURE THAT SAID PIVOT ASSEMBLY SHAFT IS DRAWN UPWARDLY THROUGH SAID PIVOT ASSEMBLY UPPER PIECE WHEN THE LEVER IS DEPRESSED TOWARD SAID PIVOT ASSEMBLY UPPER PIECE, (V) A CLAMPING NUT IN ADJUSTABLE, THREADED ENGAGEMENT WITH THE LOWER END OF SAID PVIOT ASSEMBLY SHAFT, AND (VI) A CLAMPING SPRING HELD BETWEEN SAID PIVOT ASSEMBLY LOWER PIECE AND SAID PIVOT ASSEMBLY CLAMPING NUT, AND ACTING THROUGH THESE AND THE OTHER ELEMENTS OF SAID PIVOT ASSEMBLY TO CLAMP TOGETHER SAID UPPER AND LOWER LEG MEMBERS.