Transparent, conductive absorber canister

Claim 1

AN ABSORBER DEVICE FOR REMOVING CARBON DIOXIDE FROM ANETHETIC RESPIRATORY GASEOUS COMPRISING AN ABSORBER HOUSING HAVING A GAS INLET AND A GAS OUTLET ADAPTED, RESPECTIVELY, TO BE CONNECTED TO EXHALATION AND INHALATION GAS CONDUIT MEANS OF AN ANESTHETIC BREATHING CIRCUIT SO AS TO PERMIT THE CIRCULATION THROUGH SAID HOUSING OF ANESTHETIC RESPIRATORY GASES, SEPARATE GAS PASSAGES IN SAID HOUSING CONNECTING RESPECTIVELY WITH SAID INLET AND OUTLET, A CANISTER, ADAPTED TO HOLD A CHARGE OF CARBON DIOXIDE ADSORBENT MATERIAL, DETACHABLY SUPPORTED ON SAID ABSORBER HOUSING, SAID CANISTER HAVING A DELIVERY AND A DISCHARGE OPENING ARRANGED TO CONNECT, RESPECTIVELY, WITH SAID SEPARATE GAS PASSAGES AND TO CONDUCT ANESTHETIC RESPIRATORY GASES DELIVERED TO SAID ABSORBER HOUSING LONGITUDINALLY THROUGH SAID CANISTER IN CONTACT WITH THE CHARGE OF SAID ABSORBENT MATERIAL THEREIN, SAID CANISTER HAVING A LONGITUDINALLY EXTENDING SHELL WITHIN WHICH SAID ABSORBENT CHARGE IS CONFINED INCLUDING A LONGITUDINALLY EXTENDING WALL PORTION OF SUBSTANTIALLY ELECTRICALLY NONCONDUCTIVE MATERIAL THROUGH WHICH THE ABUTTING CHARGE OF SAID ABSORBENT MATERIAL IS VISIBLE EXTERNALLY OF SAID CANISTER, A METALLIC PERFORMATED MEMBER PROVIDED WITH A MULTIPLICITY OF RELATIVELY SMALL-SIZE OPENINGS DISPOSED EXTERNALLY IN CONFRONTING RELATION TO SAID TRANSPARENT CANISTER WALL PORTION AND SUBSTANTIALLY COEXTENSIVE THEREWITH SO AS TO EFFECTIVELY SHIELD SAID TRANSPARENT PORTION FROM NORMAL EXTERNAL CONTACT WITHOUT SUBSTANTIALLY INTERFERING WITH THE VISIBILITY OF SAID SBSORBENT CHARGE THERETHROUGH AND MEANS FORMING AN ELECTRICALLY CONDUCTIVE CONNECTION BETWEEN SAID PERFORATED MEMBER AND SAID ABSORBER HOUSING.