Ditch brace

Claim 1

A DITCH BRACE ADAPTED TO BE PLACED IN A DITCH HAVING SOMEWHAT PARALLEL VERTICAL WALLS SO THAT IT WILL ENGAGE AND SUPPORT THESE WALLS TO PREVENT COLLAPSE OR CAVE-IN, SAID DITCH BRACE COMPRISING A PAIR OF ELONGATED SHORING CHANNEL MEMBERS, AN ADJUSTABLE TOGGLE ASSEMBLY PIVOTALLY CONNECTED TO SAID SHORING MEMBERS INTERMEDIATE THEIR ENDS TO MAINTAIN SAME IN SPACED RELATION AND ALLOW SAID SHORING MEMBERS TO BE DISPOSED AT AN ANGLE TO ONE ANOTHER SO AS TO BEAR AGAINST DITCH WALLS WHICH ARE NOT PARALLEL TO EACH OTHER, SAID ADJUSTABLE TOGGLE ASSEMBLY COMPISING UPPER AND LOWER TOGGLE UNITS, THE UPPER TOGGLE COMPRISING A PAIR OF TOGGLE LINKS PIVOTALLY SECURED TO EACH RESPECTIVE SHORING MEMBER, SAID TOGGLE LINK PAIRS CONVERGING UPWARDLY, A HEAD PLATE PIVOTALLY MOUNTING THE INWARD ENDS OF THE TOGGLE LINK PAIRS, THE LOWER TOGGLE UNIT COMPRISING A PAIR OF TOGGLE LINK PIVOTALLY SECURED TO EACH RESPECTIVE SHORING MEMBERS AT THE SAME POINT AS THE UPPER TOGGLE LINK PAIRS, SAID LOWER LINK PAIRS CONVERGING ADOWNWARDLY, AND A LOWER HEAD PLATE PIVOTALLY MOUNTING THE LOWER TOGGLE LINK PAIRS, THE UPPER HEAD PLATE HAVING A THREADED VERTICAL HOLE, A ROTATABLE SCREW THREADEDLY CARRIED IN THE THREADED HOLE IN THE UPPER HEAD PLATE AND ROTATABLY SECURED TO THE LOWER HEAD PLATE WHEREBY ROTATION OF THE SCREW WILL VARY THE DISTANCE BETWEEN THE HEAD PLATED AND THEREBY VARY THE DISTANCE BETWEEN THE SHORING MEMBERS.