Machine for facing shingles

Claim 1

IN A SHINGLE FACING MACHINE OF THE CHARACTER DESCRIBED THROUGH WHICH SHINGLES ARE PASSED BUTT END FIRST, A MAIN FRAME, FIRST SHINGLE FEEDING MEANS IN SAID MAIN FRAME, A TOP FRAME ASSEMBLY HINGEDLY MOUNTED ON SAID MAIN FRAME, MEANS FOR VERTICALLY OSCILLATING THE FREE END OF SAID TOP FRAME ASSEMBLY, A HINGED STOP GATE IN SAID MAIN FRAME FOR MOMENTARILY HALTING THE TRAVEL OF A SHINGLE THROUGH THE MACHINE, SAID STOP GATE NORMALLY RESTING IN CLOSED POSITION, SAID STOP GATE SO ARRANGED THAT A TRAVELING SHINGLE CAN PUSH SAID GATE OPEN AND SLIDE PAST SAID GATE EXCEPT WHEN SAID GATE IS LOCKED IN CLOSED POSITION, LOCKING MEANS CONNECTED WITH SAID TOP FRAME ASSEMBLY FOR LOCKING SAID GATE IN CLOSED POSITION, SAID LOCKING MEANS SO ARRANGED AS TO BE PLACED IN UNLOCKING POSITION BY EACH UPWARD MOVEMENT OF SAID TOP FRAME ASSEMBLY, SECOND SHINGLE DRIVE MEANS IN THE MACHINE POSITIONED BEYOND SAID STOP GATE AND ARRANGED FOR ENGAGEMENT WITH THE TOP FACE OF THE SHINGLE PASSING THROUGH SAID STOP GATE, A LOWER FRAME ASSEMBLY MOUNTED FOR UP AND DOWN OSCILLATION IN SAID MAIN FRAME, MEANS FOR VERTICALLY OSCILLATING SAID LOWER FRAME ASSEMBLY, AND A DRIVEN CUTTER HEAD MOUNTED ON SAID LOWER FRAME ASSEMBLY BENEATH THE PATH OF A TRAVELING SHINGLE AND BEYOND SAID STOP GATE AND SO POSITIONED AS TO CONTACT THE LOWER FACE OF A SHINGLE PASSING ON FROM SAID STOP GATE WHEN SAID CUTTER HEAD IS IN RAISED POSITION, SAID OSCILLATING MEANS FOR SAID TOP FRAME ASSEMBLY AND SAID OSCILLATING MEANS FOR SAID LOWER FRAME ASSEMBLY SO ARRANGED AND SYNCHRONIZED THAT SAID CUTTER HEAD WILL ALWAYS BE RETURNED TO RAISED POSITION PRIOR TO THE RAISING OF SAID TOP FRAME ASSEMBLY AND THE UNLOCKING OF SAID STOP GATE.