Liquid propellant machine gun

Claim 1

IN A LIQUID PROPELLANT GUN, THE COMBINATION COMPRISING, A COMPOSITE BLOCK INCLUDING AN INTERMEDIATE SECTION, A FORWARD SECTION AND A REARWARD SECTION, SAID SECTIONS HAVING AXIAL, ALIGNED BORES THERETHROUGH, A SLEEVE IN SAID CENTRAL SECTION AND HAVING AN INTERNAL ANNULAR SHOULDER THEREIN, THERE BEING FORWARD AND REARWARD AXIAL BORES THEREIN AND DISPOSED, ONE EACH, ON EACH SIDE OF SAID SHOULDER, SAID LAST NAMED BORES BEING COAXIAL WITH RESPECT TO SAID BORES IN SAID FORWARD AND REARWARD SECTIONS; A SINGLE DIFFERENTIAL PISTON MOUNTED FOR AXIAL RECIPROCATION IN SAID BORES IN SAID SLEEVE AND SAID BORE IN SAID REARWARD SECTION, THERE BEING AN INTEGRAL SHOULDER THEREON, SAID SHOULDER SLIDABLE IN THE REARWARD BORE OF SAID SLEEVE, A DETACHABLE SHOULDER SECURED ON THE FORWARD END OF SAID PISTON AND SLIDABLE IN THE FORWARD BORE IN SAID SLEEVE, THERE BEING A CENTRAL AXIAL PASSAGE THROUGH SAID PISTON AND BEING IN ALIGNMENT WITH THE BORES IN SAID FORWARD AND REARWARD SECTIONS, SAID DETACHABLE SHOULDER BEING FLARED TO FORM A COMBUSTION CHAMBER BETWEEN THE FORWARD FACE OF SAID PISTON AND SAID FORWARD SECTION, SAID PISTON HAVING METERING ORIFICE CHANNELS COMMUNICATING BETWEEN SAID COMBUSTION CHAMBER AND SAID BORES IN SAID SLEEVE; VALVE MEANS IN SAID BLOCK FOR ADMITTING HYPERGOLIC REACTANTS TO SAID COMBUSTION CHAMBER THROUGH SAID CHANNELS, THE INCREASE IN PRESSURE FROM COMBUSTION OF THE HYPERGOLIC REACTANTS IN SAID COMBUSTION CHAMBER BEING EFFECTIVE TO MOVE SAID PISTON REARWARDLY TO ACCELERATE THE FEED OF SAID REACTANTS INTO SAID COMBUSTION CHAMBER; A BARREL CONNECTED TO SAID FORWARD SECTION, SAID BARREL HAVING AN AXIAL BORE OF THE SAME DIAMETER AS SAID PASSAGE IN SAID PISTON AND IN ALIGNMENT THEREWITH; MEANS CONNECTED TO THE REARWARD SECTION FOR FEEDING PROJECTILES INTO SAID PASSAGE IN SAID PISTON AND BARREL; A DIFFERENTIAL PISTON STOP MECHANISM IN SAID BLOCK FOR LOCKING SAID PISTON IN A REARWARD COCKED POSITION; SCAVENGING MEANS FOR SAID GUN DISPOSED IN SAID BLOCK SECTIONS FOR PREVENTING PASSAGE OF PROPELLANTS FROM ONE OF SAID BORES IN SAID SLEEVE TO THE OTHER; AND MEANS FOR PREVENTING RETROGRADE MOTION OF THE PROJECTILES AFTER BEING FED INTO SAID PISTON AND DISPOSED BETWEEN SAID FEEDING MEANS AND SAID REARWARD SECTION COMPRISING A SERIES OF INWARDLY URGED, RADIALLY DISPOSED PLUNGERS HAVING BEVELED INNER ENDS WHEREBY WHEN A PROJECTILE IS FED FORWARDLY, SAID PLUNGERS ARE CAMMED OUTWARDLY AND SNAP INWARDLY UPON FORWARD CLEARANCE OF A PROJECTILE.