Rock cutting apparatus

Claim 1

IN A ROCK CUTTING APPARATUS INCLUDING A FRAME AND A ROTARY SAW BLADE MOUNTED ON SAID FRAME FOR ROTARY MOVEMENT ABOUT A HORIZONTAL AXIS, A VISE FOR SUPPORTING A ROCK TO BE CUT COMPRISING A POST RISING FROM SAID FRAME ADJACENT TO AND SPACED FROM SAID BLADE, A HORIZONTALLY DISPOSED SHAFT PROJECTING FROM THE UPPER END OF SAID POST AND CONNECTED TO SAID POST FOR LIMITED ROTARY MOVEMENT ABOUT ANOTHER HORIZONTAL AXIS, A BAR DISPOSED IN PARALLEL SPACED RELATION WITH RESPECT TO SAID BLADE AND HAVING ONE END CONNECTED TO SAID SHAFT FOR SLIDING MOVEMENT TOWARD AND AWAY FROM SAID BLADE, A DISC DISPOSED IN PARALLEL RELATION WITH RESPECT TO SAID BAR AND CONNECTED TO SAID BAR FOR ROTARY MOVEMENT ABOUT A FURTHER HORIZONTAL AXIS, AND A PLURALITY OF ABUTMENT MEMBERS ARRANGED IN SPACED RELATION ABOUT AND PROJECTING FROM THE FACE OF SAID DISC CONTIGUOUS TO SAID BLADE, EACH OF SAID MEMBERS BEING INDEPENDENTLY MOVABLE ON SAID DISC TOWARD AND AWAY FROM THE CENTER OF SAID DISC, SAID MEMBERS BEING ADAPTED TO ABUT AGAINST AND HOLD THEREBETWEEN A ROCK TO BE CUT.