초록 ▼

A disc formed of a resilient plastic exhibiting a low creep characteristic and having a pressure vent is used to close the mouth of a tubular cell envelope of a primary cell. An elongated terminal is inserted through the disc and into the cell interior. The pressure vent is in the disc at a location

A disc formed of a resilient plastic exhibiting a low creep characteristic and having a pressure vent is used to close the mouth of a tubular cell envelope of a primary cell. An elongated terminal is inserted through the disc and into the cell interior. The pressure vent is in the disc at a location between the terminal and the edge of the disc. The vent comprises a recess having a frangible diaphragm with at least one groove. At a predetermined pressure the diaphragm breaks at the groove, releasing pressure.

대표청구항 ▼

A sealed primary cell comprising a generally tubular envelope having a mouth at one end thereof; a mass of electrolyte disposed in the envelope; a disc having an inner and outer surface and extending across the mouth of the envelope to seal the interior of the envelope; an outer cap assembly dispose

A sealed primary cell comprising a generally tubular envelope having a mouth at one end thereof; a mass of electrolyte disposed in the envelope; a disc having an inner and outer surface and extending across the mouth of the envelope to seal the interior of the envelope; an outer cap assembly disposed over the disc; and a terminal means extending through the disc and into the electrolyte; wherein the disc is formed of polysulfone, polyphenylene oxide, polyamides, polypropylene, polyethylene, polystyrene or acrylonitrile-butadiene-styrene and has a recess, the recess defined by a wall and a diaphragm; said diaphragm having at least two radial grooves.