Continuous mining machine

Claim 1

IN A CONTINUOUS MINING MACHINE, A MOBILE MAIN FRAME, TWO VERTICALLY SPACED ALIGNED SIDE CUTTING MINING HEADS PROJECTING FORWARDLY OF SAID MAIN FRAME, EACH MINING HEAD INCLUDING A HORIZONTAL SHAFT HAVING A SCROLL EXTENDING THEREALONG AND HAVING CUTTER BITS PROJECTING THEREFROM, THE UPPER OF SAID SCROLLS BEING OF ONE HAND AND THE LOWER OF SAID SCROLLS BEING OF AN OPPOSITE HAND, A MOTOR, MEANS DRIVEN BY SAID MOTOR FOR ROTATABLY DRIVING SAID SCROLLS IN OPPOSITE DIRECTIONS AT THE SAME RATES OF SPEED TO PROGRESS THE MINED MATERIAL REARWARDLY TOWARD SAID MAIN FRAME, A FEEDER FRAME MOUNTED ON SAID MAIN FRAME FOR PIVOTAL MOVEMENT WITH RESPECT THERETO ABOUT A VERTICAL AXIS, INDIVIDUAL BOOM ARMS FOR SAID MINING HEADS TRANSVERSELY PIVOTED TO SAID FEEDER FRAME AND EXTENDING IN ADVANCE THEREOF, MEANS SUPPORTING SAID MINING HEADS ON SAID BOOM ARMS TO EXTEND FORWARDLY THEREFROM, MEANS FOR MAINTAINING SAID BOOM ARMS AND MINING HEADS IN FIXED RELATION WITH RESPECT TO EACH OTHER AND FOR VERTICALLY ADJUSTING SAID BOOM ARMS AND MINING HEADS WITH RESPECT TO EACH OTHER, TO ADJUSTABLY MOVE SAID SCROLLS TOWARD AND FROM EACH OTHER AND TO POSITION SAID SCROLLS TO CUT IN INTERDIGITATING RELATION WITH RESPECT TO EACH OTHER.