Automatic multi-dosage inoculating instrument

Claim 1

IN A HIGH SPEED INOCULATING GUN, A HOLLOW CASING IN THE FORM OF A HAND GUN COMPRISING A HANDLE PORTION AND A BARREL PORTION, A COMPRESSED AIR LINE EXTENDING UPWARDLY IN SAID HANDLE PORTION, AN AIR VALVE CYLINDER DISPOSED NORMALLY TO SAID COMPRESSED AIR LINE AT THE UPPER EXTREMITY THEREOF AND CONNECTED THERETO, A PISTON SLIDABLE IN SAID AIR VALVE CYLINDER, AN EXHAUST DUCT EXTENDING FROM SAID AIR VALVE CYLINDER, AN EXHAUST DUCT EXTENDING FROM CYLINDER DISPOSED ABOVE AND PARALLEL TO SAID AIR VALVE CYLINDER WITHIN THE BARREL PORTION OF SAID CASING AND AFFIXED IN THE EXTREMITIES THEREOF, AN AIR LINE CONNECTING SAID CYLINDERS, A PISTON SLIDABLE IN SAID MAIN CYLINDER, A SPRING IN SAID CYLINDER AHEAD OF SAID PISTON FORCING IT REARWARDLY THEREIN, PLUG MEANS IN THE REAR EXTREMITY OF SAID MAIN CYLINDER PROVIDED WITH A SCREW-THREADED AXIAL ORIFICE, A SCREW WORKING IN SAID ORIFICE BEARING AT ITS FORWARD EXTREMITY AGAINST SAID PISTON REGULATING ITS LONGITUDINAL POSITION IN SAID MAIN CYLINDER, AN AIR CHAMBER PROVIDED IN SAID MAIN CYLINDER BEHIND SAID PISTON, A VACCINE CHAMBER IN SAID MAIN CYLINDER AHEAD OF SAID PISTON, A SOURCE OF VACCINE CONNECTED TO SAID VACCINE CHAMBER, A ONE WAY VALVE SPRING PRESSED UPWARDLY BETWEEN SAID VACCINE CHAMBER AND SAID VACCINE SOURCE, A FORWARD PLUG MEANS SCREW-THREADEDLY ENGAGING THE FORWARD EXTREMITY OF SAID MAIN CYLINDER, AN AXIAL BORE THERETHROUGH EXTENDING THROUGH THE FORWARD PORTION OF THE INSTRUMENT, A ONE WAY VALVE SPRING PRESSED REARWARDLY IN SAID BORE, A NEEDLE ASSEMBLY AT THE FORWARD END OF SAID BORE, TRIGGER MEANS PIVOTALLY AFFIXED AT THE UNDERSIDE OF SAID MAIN CYLINDER DEPENDING THEREFROM OUTWARDLY OF SAID CASING AND PIVOTALLY ATTACHED TO THE FORWARD EXTREMITY OF THE PISTON IN SAID AIR VALVE CYLINER, A SPRING WITHIN THE FORWARD EXTREMITY OF SAID AIR VALVE CYLINDER ABOUT THE FORWARD EXTREMITY OF SAID PISTON URGING SAID TRIGGER AND PISTON FORWARDY, THREE EQUALLY CYLINDRICAL BAFFLES ON SAID AIR VALVE CYLINDER PISTON CLOSELY AND SEALINGLY ENGAGING THE INNER WALLS OF SAID AIR VALVE CYLINDER, THE CENTRAL OF SAID BAFFLES LYING BETWEEN SAID COMPRESSED AIR LINE AND THE LINE TO SAID MAIN CYLINDER WHEN THE TRIGGER IS IN FORWARD POSITION WHEREBY UPON DEPRESSION OF SAID TRIGGER A CHARGE OF COMPRESSED AIR WILL BE DELIVERED TO SAID MAIN CYLINDER BEHIND SAID PISTON, DRIVING IT FORWARDLY TO DELIVER A CHARGE OF VACCINE FROM SAID VACCING CHAMBER THROUGH SAID NEEDLE.