Thrust reaction support for rotary boring devices of continuous mining machine

Claim 1

IN A CONTINUOUS MINING MACHINE, A MOBILE MAIN FRAME, A CUTTER FRAME STRUCTURE AT THE FRONT OF SAID MAIN FRAME AND EXTENDING THEREARCOSS AND IN ADVANCE OF THE FORWARD END THEREOF, A BORING ASSEMBLY ROTATABLY MOUNTED AT THE FORWARD END OF SAID CUTTING FRAME STRUCTURE AND CAPABLE OF CUTTING CLEARANCE FOR SAID MAIN FRAME AND CUTTER FRAME STRUCTURE, MEANS SUPPORTING AND ADJUSTING SAID CUTTER FRAME STRUCTURE WITH RESPECT TO SAID MAIN FRAME AT VARYING ANGLES AND ELEVATIONS COMPRISING, TWO LATERALLY SPACED ELEVATING JACKS ON OPPOSITE SIDES OF SAID MAIN FRAME, UNIVERSAL BEARING CONNECTION BETWEEN SAID JACKS AND MAIN FRAME AT THE FRONT END OF SAID MAIN FRAME, MEANS ADJACENT SAID CUTTER FRAME STRUCTURE FOR RETAINING SAID CUTTER FRAME STRUCTURE FROM SIDEWISE MOVEMENT WITH RESPECT TO SAID MAIN FRAME, AND SPACED ARMS RIGIDLY MOUNTED AT THE BACK OF SAID CUTTER FRAME STRUCTURE AND EXTENDING REARWARDLY THEREFROM ALONG OPPOSITE SIDES OF SAID MAIN FRAME ADJACENT THE REAR END THERETO SAID MAIN FRAME ADJACENT THE REAR END THEREOF FOR MOVEMENT ABOUT COAXIAL HORIZONTAL AXES, SAID ARMS HAVING SUFFICIENT COMPRESSIVE STABILITY TO TRANSFER THE THRUST REACTIONS OF MINING FROM SAID CUTTER FRAME STRUCTURE TO THE REAR END PORTION OF SAID MAIN FRAME, AND HAVING SUFFICIENT TORSIONAL INSTABILITY TO ACCOMMODATE ANGULAR ADJUSTMENT OF SAID CUTTER FRAME STRUCTURE ABOUT AN AXIS EXTENDING LONGITUDINALLY OF SAID MAIN FRAME BY OPERATION OF SAID ELEVATING JACKS.