Mounting boxes and picks for coal-cutting machines

Claim 1

THE COMBINATION OF A POINT-ATTACK MINING MACHINE PICK HAVING A CYLINDRICAL SHANK WITH A CIRCUMFERENTIAL GROOVE INTERMEDIATELY OF ITS LENGTH AND A TIPPED BODY LARGER IN DIAMETER THAN THE SHANK AND JOINED TO THE SHANK BY A SHOULDER PORTION OF PROGRESSIVELY INCREASING DIAMETER AND A MOUNTING BOX WHICH COMPRISES A BLOCK IN WHICH IS FORMED A LONGITUDINAL BORE FOR THE RECEPTION OF THE PICK SHANK, ONE END OF SAID BORE BEING FORMED WITH A FLARED PORTION TO FIT THE SHOULDER PORTION OF THE PICK TO EFFECT TRANSMISSION OF THE WORKING THRUST BETWEEN THE BLOCK AND THE PICK, SAID BLOCK HAVING A PAIR OF TRANSVERSELY EXTENDING HOLES, EACH OF SAID HOLES EXTENDING IN SAID BLOCK ON BOTH SIDES OF SAID BORE, SAID HOLES BEING CONTINUOUSLY DIVERGENT FROM EACH OTHER AND POSITIONED SO AS TO INTERSECT SAID BORE ON OPPOSITE SIDES THEREOF, AND A GENERALLY U-SHAPED STIFF WIRE LOCKING MEMBER HAVING LIMBS ADAPTED TO BE RECEIVED BY SAID TRANSVERSE HOLES TO AS TO ASSUME A DIVERGENT POSITION FOR SELF LOCKING IN SAID BLOCK, AN INTERMEDIATE PORTION OF EACH OF SAID LIMBS SERVING TO ENGAGE THE REAR EDGE OF SAID GROOVE IN SAID SHANK TO INSURE THAT SAID SHOULDER PORTION IS DRAWN TO ANE SECURELY HELD AGAINST SAID FLARED PORTION.