Mixing syringe having separate compartments for incompatible medicaments

Claim 1

A SYRINGE COMPRISING A BARREL; AN EXTENSION ON SAID BARREL; A NEEDLE MOUNTED IN SAID EXTENSION AND COMMUNICATING WITH SAID BARREL; A NEEDLE COVER CONNECTED TO SAID EXTENSION AND COVERING SAID NEEDLE AND SEALING THE OPEN END THEREOF; A RESILIENT PLUNGER MOUNTED IN SAID BARREL FOR RECIPROCATION LONGITUDINALLY THEREOF; SAID PLUNGER HAVING A CENTRAL OPENING THEREIN HAVING FEMALE THREADS EXTENDING FOR A PORTION OF THE LENGTH OF SAID OPENING; CONNECTED TO SAID PLUNGER A GENERALLY CYLINDRICAL VIAL HAVING MALE THREADS ON THE OPEN END THEREOF WHICH MATE WITH SAID FEMALE THREADS; SAID RESILIENT PLUNGER HAVING AT LEAST ONE PASSAGE THEREIN ADAPTED TO COMMUNICATE SAID BARREL AND SAID VIAL, THE UPPER END OF SAID PASSAGE BEING SEALED BY THE END OF SAID VIAL WHEN SAID THREADS ARE MADE UP; SAID PASSAGE BEING SPANNED BY A THIN RESILIENT MEMBRANE HAVING A NARROW SLIT THEREIN NORMALLY HELD CLOSED BY THE RESILIENT MATERIAL.