Leakproof dry cell

Claim 1

A DRY CELL COMPRISING A ZINC CUP CONSTITUTING AN ELECTRODE, A MASS OF MIX AND A CENTRAL GAS-PERMEABLE CARBON ELECTRODE WITHIN SAID CUP, A WASHER DISPOSED IMMEDIATELY ABOVE SAID MAS OF MIX, A SOFT PLASTIC INNER SEAL ENGAGING SAID WASHER, SAID CARBON ELECTRODE AND THE INNER WALL OF SAID CUP, A RIGID WASHER ABOVE THE UPPER SURFACE OF SAID INNER SEAL, AND HAVING AN ORIFICE THROUGH WHICH THE MATERIAL OF SAID INNER SEAL IS EXTRUDABLE UNDER PRESSURE, SAID RIGID WASHER EXTENDING FROM AID CARBON ELECTRODE TO THE INNER SURFACE OF SAID CUP, SAID CUP HAVING A PORTION OF REDUCED DIAMETER ABOVE SAID RIGID WASHER PROVIDING A SHOULDER FOR PREVENTING UPWARD MOVEMENT OF SAID RIGID WASHER UNDER THE INFLUENCE OF PRESSURE WITHIN THE CELL, AN IMPERFORATE METAL CLOSURE CAP FOR THE TOP OF THE CELL, SAID CAP ENGAGING SAID CARBON ELECTRODE AND PROVIDING A TERMINAL THEREFOR AND HAVING A PERIPHERAL PORTION OVERLYING THE UPPER EDGE OF THE REDUCED PORTION OF SAID CUP, THERE BEING AN EXPANSION SPACE WITHIN SAID CUP BETWEEN SAID CAP AND SAID RIGID WASHER, A RESILIENT SEALING WASHER HAVING ITS CENTRAL PORTIONS ENGAGING SAID CARBON ELECTRODE AND ITS PERIPHERAL PORTION DISPOSED BETWEEN SAID EDGE AND SAID PERIPHERAL PORTION OF SAID CAP, AN OPEN ENDED OUTER STEEL JACKET SURROUNDING SAID ZINC CUP, THE LOWER EDGE OF SAID JACKET BEING TURNED INWARDLY TO ENGAGE AND MAKE ELECTRICAL CONTACT WITH THE BOTTOM OF THE ZINC CUP, AND ABSORBENT PAPER LINER WITHIN SAID JACKET AND SURROUNDING THE SIDE WALL OF SAID CUP, SAID LINER BEING SPACED FROM THE SIDE WALL OF SAID CUP ADJACENT SAID REDUCED PORTION THEREOF, THE UPPER EDGE OF SAID JACKET BEING TURNED INWARDLY TO URGE SAID CAP TOWARD SAID EDGE OF SAID ZONC CUP AND TO COMPRESS SAID SEALING WASHER BETWEEN SAID EDGE AND SAID CAP, THERE BEING INSLUATION BETWEEN SAID CAP AND SAID JACKET.