Plugging gun of the repeating type

Claim 1

A GUN FOR PLUGGING A SURFACE, COMPRISING A BODY HAVING A FRONT AND REAR END, SAID BODY INCLUDING AN ENLARGED HOUSING PORTION, SAID BODY BEING PROVIDED WITH A FIRST LONGITUDINAL BORE IN THE FRONT END THEREOF, SAID HOUSING PORTION BEING PROVIDED WITH A BORE OF LARGER DIAMETER THAN THE FIRST SAID BORE AND OPENING THEREINTO, SAID BORES BEING PARALLEL TO ONE ANOTHER AND ECCENTRICALLY ARRANGED, A SHIELD ENCIRCLING THE FRONT END OF THE BODY AND REMOVABLY COUPLED THERETO, A CYLINDER REMOVABLY AND REVOLVABLY SUPPORTED INSIDE THE BORE IN THE HOUSING PORTION OF THE BODY AND PROVIDED WITH A PLURALITY OF ANNULARLY DISTRIBUTED CARTRIDGE CHAMBERS EACH OF WHICH IS ADAPTED TO REGISTER IN SUCCESSION WITH THE FIRST SAID BORE, A RING SLIDINGLY SUPPORTED INSIDE THE FIRST BORE, A HOLLOW BARREL SLIDINGLY SUPPORTED INSIDE SAID RING AND INCLUDING A FORWARDLY FACING SHOUDER AT THE REAR THEREOIF AND A REARWARDLY TAPERING TERMINAL SECTION SLIDINGLY SUPPORTED IN THE REAR END OF THE FIRST SAID BORE, A SLIDER, AN ENDPIECE DETACHABLY SECURED TO THE SLIDER AND EXTENDING FORWARDLY OF THE BARREL, SAID END-PIECE BEING ADAPTED FOR BEING URGED AGAINST THE SURFACE TO BE PLUGGED TO MOVE SAID SLIDER, MEANS INCLUDING A TRIGGER, STRIKER AND SEAR SUPPORTED IN THE BODY AND COOPERATING WITH THE SLIDER TO COCK THE GUN AND ADAPT THE SAME FOR BEING OPERATED TO FIRE THE CARTRIDGE IN THE CHAMBER REGISTERING WITH THE BARREL IN THE FIRST SAID BORE, TWO ALIGNED SPRINGS LOCATED ON EITHER SIDE OF THE SLIDING RING, ONE OF SAID SPRINGS BEING SUPPORTED BETWEEN THE RING AND THE END-PIECE, THE OTHER SPRING BEING SUPPORTED BETWEEN THE RING AND THE SHOULDER OF THE BARREL, TO URGE THE BARREL REARWARDLY INTO ENGAGEMENT WITH THE CYLINDER, SAID CYLINDER IN TURN BEING URGED REARWARDLY INTO ENGAGEMENT WITH THE HOUSING PORTION OF THE BODY AT THE REAR END OF THE BORE THEREIN.