Double acting two stroke cycle internal combustion engines

Claim 1

IN A DOUBLE ACTING TWO STROKE CYCLE INTERNAL COMBUSTION ENGINE, THE COMBINATION OF A CRANKCASE, A CYLINDER SHAFT ROTATABLY MOUNTED IN SAID CRANKCASE, A CYLINDER STRUCTURE FASTENED TO SAID CRANKCASE, SAID CYLINDER STRUCTURE HAVING WITHIN IT A FRONT WORKING CYLINDER AND A BACK WORKING CYLINDER, A CYLINDER HEAD INSERTED INTO THE CYLINDER STRUCTURE AND LOCATED BETWEEN SAID FRONT AND BACK WORK ING CYLINDERS, SAID FRONT AND BACK WORKING CYLINDERS HAVING RESPECTIVE FRONT AND BACK COMBUSTION CHAMBERS WITH IN THEM, SAID BACK WORKING CYLINDER HAVING WITHIN IT A CYLINDER LINER, A FRONT WORKING PISTON RECIPROCABLE IN SAID FRONT WORKING CYLINDER, A BACK WORKING PISTON RECIPROCABLE IN A SAID LINER IN THE BACK WORKING CYLINDER, SAID CYLINDER HEAD HAVING A CENTRAL BORE, SAID PISTONS BEING MECHANICALLY INTERCONNECTED THROUGH SAID BORE IN THE CYLINDER HEAD SO AS TO RECIPROCATE IN UNISON, A CONNECTING ROD FOR CONVERTING THE RECIPROCATING MOTION OF SAID PISTONS TO THE ROTARY MOTION OF SAID CRANKSHAFT, SAID LINER HAVING EXHAUST PORTS IN ITS WALL CONTROLLED BY SAID BACK PISTON, SAID LINER ALSO SERVING TO RETAIN SAID COMMON CYLINDER HEAD IN AXIAL POSITION WITHIN SAID CYLINDER STRUCTURE, SAID ENGINE BEING ADAPTED TO BE COOLED WITH A LIQUID COOLANT SAID CYLINDER STRUCTURE AND SAID CYLINDER HEAD HAVING