Hypodermic syringe and cartridge

Claim 1

IN COMBINATION, A CARTRIDGE AND SYRINGE HAVING A BARREL, SAID CARTRIDGE BEING REMOVABLY PLACED IN SAID BARREL AND HAVING A NEEDLE PUNCTURABLE CLOSURE CAP AT ONE END, A HYPODERMIC NEEDLE EXTENDING THROUGH A NEEDLE RECEIVING PASSAGE IN SAID SYRINGE TO SAID CLOSURE CAP OF SAID CARTRIDGE AND HAVING A SLIDABLE SLEEVE NORMALLY MOUNTED WITH A SLIDABLE FRICTION FIT AROUND THE CARTRIDGE ENTRANT END OF SAID NEEDLE, SAID CARTRIDGE ENTRANT END OF SAID NEEDLE BEING ADAPTED TO BE INSERTED WITH SAID SLEEVE THEREAROUND INTO SAID NEEDLE RECEIVING PASSAGE IN SAID SYRINGE TO SAID CLOSURE CAP, SAID CAP COMPRISING A SEAL AND A CLAMPING MEMBER HAVING A NEEDLE PUNCTURABLE WALL OVERLYING SAID SEAL, THE CIRCUMFERENTIAL SURFACE AREA OF SAID CLAMPING MEMBER PROTRUDING BELOW ITS CENTRAL NEEDLE PUNCTURABLE AREA TO PROVIDE A CENTRALLY RECESSED AREA TO PREVENT CONTACT OF SAID NEEDLE PUNCTURABLE AREA WITH THE SYRINGE, SAID SLEEVE BEING SLIDABLE BACK ON SAID NEEDLE BY ENGAGEMENT WITH SAID RECESSED AREA TO EXPOSE SAID CARTRIDGE ENTRANT END OF SAID NEEDLE, SAID NEEDLE PUNCTURABLE AREA BEING PIERCED BY SAID EXPOSED ENTRANT END OF SAID NEEDLE WITH SAID SLEEVE SLID BACK ON SAID NEEDLE TO A POSITION INTERMEDIATE THE ENDS OF SAID NEEDLE AND OUTSIDE SAID CLOSURE CAP, SAID RECESSED AREA BEING CONCAVE INWARDLY, SAID SLIDABLE SLEEVE HAVING A FLANGE AT ITS LEADING END, SAID CONCAVE RECESS BEING DEEP ENOUGH AND WIDE ENOUGH TO RECEIVE SAID FLANGE.