Hot-gas reciprocating engines of the displacer piston type

Claim 1

A HOT-GAS RECIPROCATING ENGINE ADAPTED FOR DRIVING A DRIVEN ELEMENT COMPRISING; AT LEAST ONE CYLINDER, AT LEAST ONE PISTON AND AT LEAST ONE DISPLACER ADAPTED FOR RECIPROCATION IN SAID CYLINDER WITH A RELATIVE PHASE DIFFERENCE, AT LEAST ONE PAIR OF IDENTICAL CRANKS, AT LEAST TWO CRANKSHAFTS, SAID CRANKS BEING LOCATED EACH ON ONE SIDE OF A PLANE EXTENDING THROUGH THE CENTER LINE OF SAID ENGINE AND FORMING PART OF SAID TWO CRANKSHAFTS, SAID CRANKSHAFTS BEING ROTATED IN THE SAME PHASE, IN SYNCHRONISM AND IN RELATIVELY OPPOSITE DIRECTIONS, THE CENTER LINES OF SAID SHAFTS BEING PARALLEL TO EACH OTHER AND BEING LOCATED SYMMETRICALLY, EACH ON ONE SIDE OF THE PLANE GOING THROUGH SAID ENGINE IN A PLANE AT RIGHT ANGLES TO THE CENTER LINE OF SAID ENGINE, EACH PAIR OF ASSOCIATED CRANKS BEING CONNECTED WITH AT LEAST ONE PISTON AND AT LEAST ONE DISPLACER, AT LEAST ONE PISTON CONNECTING ROD CONNECTING SAID PISTON AND THE RESPECTIVE CRANK, AT LEAST ONE DISPLACER CONNECTING ROD CONNECTING SAID DISPLACER AND THE RESPECTIVE CRANK THE RECTILINEARLY MOVING PARTS OF SAID PISTON CONNECTING RODS BEING LOCATED ON ONE SIDE AND THE RECTILINEARLY MOVING PARTS OF THE DISPLACER PISTON BEING LOCATED ON THE OTHER SIDE OF THE PLANE EXTENDING THROUGH THE CENTER LINES OF SAID CRANK SHAFTS, A WORM MOUNTED ON EACH OF SAID CRANKSHAFTS, AND ANOTHER SHAFT PROVIDED WITH A WORM GEAR WHICH COUPLES SAID HOT-GAS RECIPROCATING ENGINE WITH SAID DRIVEN ELEMENT.