Electrochemical cell and selfventing enclosure therefor

Claim 1

AN ELECTROCHEMICAL CELL COMPRISING, IN COMBINATION, A PAIR OF TERMINAL CUPS FACED INTO EACH OTHER AND HAVING COOPERATING MARGINAL REGIONS, AN INSULATIVE GROMMET HAVING A FIRST PORTION INTERPOSED BETWEEN SAID REGIONS AND A SECOND PORTION, AND AN OUTER JACKET ENCIRCLING AT LEAST THE MARTINAL REGIONS OF SAID CUPS, SAID JACKET BEING FIXED AT ONE END WITH RESPECT TO ONE OF SAID CUPS AND BEING AT THE OTHER END RADIALLY CONSTRICTED IN A REGION WHICH IS DIRECTLY OVERLYING AND IS IN DIRECT PRESSURE CONTACT WITH SAID SECOND PORTION OF THE GROMMET FOR APPLYING AT SAID OTHER END AXIAL SEALING PRESSURE UPON SAID FIRST PORTION OF THE GROMMET AND RADIAL SEALING PRESSURE UPON SAID SECOND PORTION OF THE GROMMET THEREBY MAINTAINING SAID CUPS AND THE GROMMET THEREBETWEEN IN AIR-TIGHTLY SEALED RELATION BUT CAPABLE OF LIMITED AXIAL VENTING DISPLACEMENT AWAY FROM EACH OTHER IN RESPONSE TO EXCESSIVE INTERNAL PRESSURE, SAID AXIAL DISPLACEMENT OF THE CUPS BEING EFFECTIVE TO DECREASE THE SEALING PRESSURE UPON SAID FIRST PORTION OF THE GROMMET AND TO INCREASE THE SEALING PRESSURE UPON SAID SECOND PORTION OF THE GROMMET WHEREBY SAID PRESSURE IS RELEASED AROUND THE EDGE OF ONE CUP INTO THE INTERSPACE BETWEEN SAID CUP AND JACKET WHILE DIRECT RELEASE OF SAID PRESSURE INTO THE EXTERIOR IS PREVENTED.