Carbon dioxide absorber

Claim 1

A CORBON DIOXIDE ABSORBER FOR ANESTHETIC ADMINISTERING APPARATUS, COMPRISING A HOUSING HAVING AN ANNULAR SEATING SURFACE ON THE BOTTOM THEREOF, A DETACHABLE, CYLINDRICAL CANISTER SUPPORTED BY SAID HOUSING, ADAPTED TO HOLD A SUPPLY OF CARBON DIOXIDE ABSORBENT, HAVING AN OPEN TOP RECEIVED IN SUB STANTIALLY GAS-TIGHT ENGAGEMENT AGAINST SAID ANNULAR SEATING SURFACE, FIRST AND SECOND OPENINGS IN THE BOTTOM OF SAID HOUSING REGISTERING WITH THE OPEN TOP OF SAID CANISTER AND FORMING A PART OF A BREATHING CIRCUIT THROUGH WHICH GASES ARE ADAPTED TO BE CIRCULATED THROUGH SAID CANISTER, SAID FIRST OPENING BEING CONCENTRICALLY DISPOSED WITH RESPECT TO SAID ANNULAR SEATING SURFACE, A REMOVABLE DOWN-TUBE ASSEMBLY IN SAID CANISTER, INCLUDING A VERTICAL TUBULAR MEMBER REGISTERING AT ITS UPPER END WITH SAID FIRST OPENING AND HAVING A RADIALLY EXTENDING SCREEN AT ITS LOWER END WHICH IS ADAPTED TO SUPPORT THEREON A BED OF THE CARBON DIOXIDE ABSORBENT, SAID SCREEN BEING SEATED ON THE BOTTOM OF SAID CANISTER AND SHAPED WITH RESPECT THERETO TO FORM A DISTRIBUTING CHAMBER AT THE BOTTOM OF SAID CANISTER COMMUNICATING WITH THE LOWER END OF SAID TUBE, AND MEANS FEOR DETACHABLY SECURING SAID CANISTER TO SAID ABSORBER, INCLUDING A THREADED SOCKET WITHIN SAID FIRST OPENING AND A RETAINING SCREW, SAID RETAINING SCREW HAVING AN ADJUSTING KNOB BEARING AGAINST THE BOTTOM OF SAID CANISTER AND AN ELONGATED SHAFT EXTENDING UPWARDLY THROUGH SAID TUBULAR MEMBER, THREADEDLY ENGAGED IN SAID SOCKET.