A leak detector employing an ion-conducting membrane is disclosed. A labelled-gas ion conducting membrane which employs a high vacuum on one side is used to detect very small quantities of said labelled-gas flowing through a minute fissure in a part or device to be tested for leaks. The labelled-gas ion conducting membrane is biased with direct current voltage to drive the labelled-gas ions through the membrane away from the high vacuum side.

An electrochemical oxygen generating device employing oxygen-conducting metal oxide electrolyte and a silver or silver alloy containing non-porous electrode is disclosed.

A leak detector employing an ion-conducting membrane is disclosed. An oxygen-ion conducting membrane which employs a high vacuum on one side is used to detect very small quantities of oxygen flowing through a minute fissure in a part to be tested for leaks. The oxygen-ion conducting membrane is biased with direct current voltage to drive oxygen-ions through the membrane away from the high vacuum side.

A method for preparing stable non-stoichiometric cathode material to provide cathodes useful in non-aqueous electrochemical cells having an active metal (eg. lithium) anode. The method comprises reducing the non-stoichiometric cathode material (eg. manganese dioxide) with the active metal or a precursor compound of said active metal to form a compound of the active metal and stoichiometric active cathode material.

A method for preparing stable non-stoichiometric cathode material to provide cathodes useful in non-aqueous electrochemical cells having an active metal (e.g. lithium) anode. The method comprises reducing the non-stoichiometric cathode material (e.g. manganese dioxide) with the active metal or a precursor compound of said active metal to form a compound of the active metal and stoichiometric active cathode material.

An electrochemical oxygen generating device employing oxygen-conducting metal oxide electrolyte, a non-porous silver or silver alloy containing electrode and an electrode undercoat comprising a ceramic oxide electronic conductor is disclosed.

A fluid delivery device (10) operated by a first gas delivery device (12) (e.g. electrochemical pump) that takes advantage of sequential gas production methods. The fluid delivery device includes a container (14) with an interior surface. An first gas delivery device for producing or delivering a first gas is placed in one end of the container. A moveable member (e.g. piston, bladder (18) or membrane) is positioned within the container, which moveable member, together with the container's interi...

A method for purifying crude argon is disclosed. Trace amounts of oxygen and/or nitrogen are removable by using a combination of a nitride forming metal and an oxygen ion conducting electrolyte cell. Lithium may be electrolytically recovered from lithium nitride. Alternatively, a reactive metal such as lithium may be utilized to remove trace amounts of both nitrogen and oxygen from crude argon.

A fluid delivery device (10) operated by a first gas delivery device (12) (e.g. electrochemical pump) that takes advantage of sequential gas production methods. The fluid delivery device includes a container (14) with an interior surface. An first gas delivery device for producing or delivering a first gas is placed in one end of the container. A moveable member (e.g. piston, bladder (18) or membrane) is positioned within the container, which moveable member, together with the container's interi...

A brush having a handle and associated surface application portion, which brush handle contains a beneficial agent generator. The brush typically has a stem with first and second ends, the first end serving as a handle. Bristles are associated with the stem's second end. A beneficial agent generator (such as an electrochemical gas generating cell) that generates a fluid comprising an oxidizing agent is encased within the stem. For treating teeth, the generator will generally be chosen to generat...