Swaging hammers

Claim 1

A FORGING HAMMER INCLUDING A HAMMER FRAME, AN UPPER TUP AND A LOWER TUP ARRANGED OPPOSITE EACH OTHER, EACH TUP BEING MOVABLE UPWARDS AND DOWNWARDS TOWARD OR AWAY FROM EACH OTHER, HYDRAULIC COUPLING MEANS INCLUDING AN UPPER CYLINDER ON SAID FRAME AND AN UPPER PISTON CONNECTED TO SAID UPPER TUP BY AN UPPER PISTON ROD FORMING AN UPPER ANNULAR SPACE BELOW SAID PISTON ABOUT SAID PISTON ROD, A LOWER CYLINDER ON SAID FRAME AND A LOWER PISTON CONNECTED TO SAID LOWER TUP BY A LOWER PISTON ROD, A LOWER ANNULAR SPACE WITHIN SAID LOWER CYLINDER ABOUT SAID PISTON ROD, A LOWER CYLINDER SPACE BELOW SAID LOWER PISTON WITHIN SAID LOWER CYLINDER, A CONNECTING PIPE BETWEEN SAID UPPER ANNULAR CYLINDER SPACE AND SAID LOWER CYLINDER SPACE, AND A LIQUID IN THE TWO AFORESAID CYLINDER SPACES AND IN THE CONNECTING PIPE, THE SPACE ABOVE THE UPPER PISTON IN SAID UPPER CYLINDER BEING FILLED WITH COMPRESSIBLE FLUID, THE LOWER ANNULAR SPACE WITHIN SAID LOWER CYLINDER ABOVE SAID LOWER PISTON BEING FILLED WITH LIQUID, A LIQUID SUPPLY AND EXHAUST PIPE CONNECTED TO SAID LOWER ANNULAR SPACE WITHIN SAID LOWER CYLINDER, PUMP MEANS HAVING A SUCTION AND DISCHARGE CONNECTED TO SUPPLY LIQUID UNDER PRESSURE TO SAID LIQUID SUPPLY AND EXHAUST PIPE, AND CONTROLLABLE VALVE MEANS TO DISCHARGE LIQUID FROM SAID LIQUID SUPPLY AND EXHAUST PIPE.