Shearing machine

Claim 1

A SHEARING MACHINE COMPRISING A FRAME; A FIRST BLADE FIXED TO SAID FRAME AND HAVING AN ELONGATED CUTTING EDGE; A SECOND BLADE HAVING A PAIR OF SPACED END PORTIONS AND COMPRISING AN ELONGATED CUTTING EDGE SUBSTANTIALLY PARALLEL WITH THE CUTTING EDGE OF SAID FIRST BLADE, SAID SECOND BLADE BEING MOVABLE TOWARD AND AWAY FROM SAID FIXED BLADE SO THAT, WHEN SAID SECOND BLADE MOVES TOWARD THE FIXED BLADE, SAID CUTTING EDGES FORM A CUT IN A WORKPIECE WHICH IS PLACED BETWEEN SAID BLADES WHEREBY THE WORKPIECE GENERATES A REACTION FORCE WHICH TENDS TO MOVE THE SECOND BLADE LATERALLY OF AND AWAY FROM SAID FIRST BLADE, A SUPPORT RECIPROCABLY RECEIVED IN SAID FRAME AND HAVING A RETAINING PORTION RIGID WITH AND CLOSELY ADJACENT TO THE CUTTING EDGE OF SAID SECOND BLADE; MEANS FOR MOVING SAID SUPPORT AND SAID SECOND BLADE TOWARD SAID FIRST BLADE, SAID MOVING MEANS COMPRISING A PAIR OF HYDRAULIC JACKS EACH MOUNTED IN SAID FRAME, EACH OPERATIVELY CONNECTED WITH SAID SUPPORT, AND EACH ADAPTED TO APPLY A SHEARING FORCE TO ONE END PORTION OF SAID SECOND BLADE, AND SEPARATE FLUID PRESSURE GENERATING MEANS FOR SAID JACKS SO THAT THE SHEARING FORCE WHICH IS APPLIED TO THE SECOND BLADE BY ONE OF SAID JACKS IN RESPONSE TO FLUID PRESSURE GENERATED BY THE RESPECTIVE PRESSURE GENERATING MEANS MAY BE ADDED TO THE SHEARING FORCE WHICH IS APPLIED BY THE OTHER JACK; HOLDING MEANS MOUNTED IN SAID FRAME FOR RESISTING THE REACTION FORCE WHICH ACTS UPON SAID SECOND BLADE, SAID HOLDING MEANS COMPRISING A PLURALITY OF HOLDING MEMBERS ENGAGING SAID RETAINING PORTION OF THE SUPPORT IN CLOSE PROXIMITY OF THE CUTTING EDGE OF SAID SECOND BLADE AND RESILIENT MEANS FOR BIASING SAID SUPPORT AGAINST SAID HOLDING MEMBERS, SAID RESILIENT MEANS OPERATING BETWEEN SAID SUPPORT AND SAID FRAME.