Primary battery

Claim 1

A PRIMARY DRY BATTERY COMPRISING AN OUTER CYLINDRICAL METALLIC CONTAINER CLOSED AT ONE END AND OPEN AT THE OTHER END AND WITHIN WHICH IS DISPOSED AT LEAST ONE CYLINDRICAL DRY CELL WHICH HAS A HOLLOW CYLINDRICAL OUTER SLEEVE OF DIELECTRIC MATERIAL PROVIDED WITH AN OUTSTANDING ANNULAR BOSS AT THE END OF SAID SLEEVE, ACTIVE CELL COMPONENTS WITHIN THE INTERIOR OF SAID CYLINDRICAL OUTER SLEEVE, AND SUBSTANTIALLY FLAT METALLIC END CAPS AT EACH END OF SAID OUTER SLEEVE, SAID CAPS EACH HAVING AN ANNULAR SKIRT CRIMPED OVER AND AROUND A BOSS ON THE SAID SLEEVE, ONE OF SAID END CAPS BEING IN PHYSICAL AND CONDUCTIVE CONTACT WITH THE CLOSED END OF SAID CONTAINER, THE OTHER OF SAID END CAPS BEING INSULATED FROM THE SIDE WALL OF SAID CONTAINER, A BATTERY TERMINAL CLOSURE DISPOSED AT THE OPEN END OF SAID CONTAINER, BEING INSULATED FROM THE SIDE WALL OF SAID CONTAINER BUT IN PHYSICAL AND CONDUCTIVE CONTACT WITH THE ADJACENT DRY CELL END CAP, THE OPEN END OF SAID METALLIC CONTAINER BEING CRIMPED OVER THE UNDERLYING EDGES OF SAID BATTERY TERMINAL CLOSURE, AND A VENT IN SAID BATTERY, WHEREBY AN ANNULAR CHAMBER IS PROVIDED IN THE SPACE DEFINED BETWEEN THE CAPPED BOSSES OF SAID DRY CELL, THE EXTERIOR SIDE WALL OF SAID SLEEVE INTERMEDIATE SAID CAPPED BOSSED, AND THE ADJACENT INTERIOR SIDE WALL OF SAID CONTAINER, AND WHEREBY ANY GAS FORMED BY REACTION OF THE ACTIVE CELL COMPONENTS MAY FIRST OCCUPY SAID ANNULAR CHAMBER AND THENCE BE VENTED TO THE EXTERIOR OF SAID BATTERY.