Primary dry cell with gas-venting passageway around the cathode mix
AssigneeUnion Carbide Corporation
InventorLewis Frederick Urry
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Abstract
Primary dry cell comprising a metal anode cup having a cathode mix therein, separated from the side wall of the anode cup by a porous, ionically permeable separator, and having an open end which is gas-tightly sealed by a closure including a vent, wherein a gas-venting passageway is provided around the cathode mix comprising a longitudinal groove in the side wall of the anode cup communicating with the void space defined between the cathode mix and the seal closure.
Claims7
A primary dry cell comprising a metal anode cup having an open end which is gas-tightly sealed by a closure including a vent and having a cathode mix therein comprising particles of an oxidic depolarizer, finely-divided conductive material and an electrolyte, separated from the side wall of said anode cup by a porous, ionically permeable separator, said closure and said cathode mix defining a void space therebetween, wherein a gas-venting longitudinal groove in the side wall of said anode cup communicating with said void space to thereby enable gas normally entrapped near the bottom of said anode cup to pass freely around said cathode mix and into said void space from whence the gas can escape through said vent.
Dependencies are inferred from the claim text.