Machine gun with a mount for reducing the recoil forces applied to the trunnions

Claim 1

A MACHINE GUN INCLUDING A NONRECOILING MASS HAVING A MOUNT ASSEMBLY; A RECOILING MASS HAVING A RECEIVER ASSEMBLY SLIDINGLY MOUNTED ON SAID MOUNT ASSEMBLY TO PROVIDE FOR RECIPROCATION OF SAID RECOILING MASS BETWEEN A FORWARD AND A REARWARD POSITION; A BARREL DISPOSED FOR RECIPROCATION IN SAID RECEIVER BETWEEN A FORWARD LOADING POSITION AND A REARWARD FIRING POSITION; SAID RECOILING MASS BEING DISPLACEABLE TO THE REARWARD POSITION BY DISCHARGE OF A CARTRIDGE IN SAID BARREL; AN ENERGY STORING DEVICE ARRANGED TO BE ENERGIZED BY DISPLACEMENT OF SAID RECOILING MASS BY THE CARTRIDGE DISCHARGE AND TO APPLY THE STORED ENERGY AGAINST SAID RECOILING MASS IN A FORWARD DIRECTION; SEAR MEANS FOR RELEASABLY HOLDING SAID RECOILING MASS ADJACENT THE REARWARD POSITION AGAINST DISPLACEMENT BY THE STORED ENERGY IN SAID DEVICE EACH FIRING CYCLE, SAID SEAR MEANS INCLUDING A PAIR OF SEARS RESPECTIVELY MOUNTED ON OPPOSITE SIDES OF SAID MOUNT ASSEMBLY FOR PIVOTAL DISPLACEMENT RESPECTIVE TO A COOPERATING PAIR OF LUGS ON SAID RECEIVER ASSEMBLY, A SURFACE ON EACH OF SAID SEARS DISPOSED OF SAID LUGS, SAID SURFACES ON SAID SEARS AND SAID LUGS BEING FOR CONTACT WITH A MATING SURFACE ON THE COOPERATING ONES ANGULARLY FORMED SO THAT WHEN IN FIXED CONTACT SAID RECOILING MASS IS HELD THEREBY ADJACENT THE REARWARD POSITION AND SO THAT FORWARD DISPLACEMENT OF SAID RECOILING