Anode limited sealed secondary battery having an auxiliary electrode

Claim 1

AN ANODE LIMITED RECHARGEABLE BATTERY OPERATING ON A HYDROGEN CYCLE, COMPRISING; A SEALED CONTAINER HAVING THEREIN AN ANODE, A CATHODE, A POROUS AUXILIARY ELECTRODE, AND AN ELECTROLYTE IN CONTACT WITH SAID ANODE, CATHODE, AND POROUS AUXIALIARY ELECTRODE, A PRESSURE CONTROLLED SWITCH RESPONSIVE TO THE INTERNAL PRESSURE WITHIN SAID SEALED CONTAINER, SAID SWITCH COMPRISING AN ELASTIC GAS-IMPERMEABLE DIAPHRAGM HAVING A FIRST CONTACT MEMBER DISPOSED OVER AN APERTURE IN SAID CONTAINER AND A SUPPORTING MEMBER SUPPORTING A SECOND CONTACT MEMBER, THE OUTER SURFACE OF SAID GAS-IMPERMEABLE DIAPHRAGM BEING EXPOSED TO ATMOSPHERIC PRESSURE AND THE INNER SURFACE BEING EXPOSED TO THE INTERNAL PRESSURE OF THE BATTERY; SAID AUXIALIARY ELECTRODE CONSISTING ESSENTIALLY OF THE BATTERY; SAID ACTIVATEC CARBON HAVING A POROSITY OF BETWEEN ABOUT 25 AND 35 PERCENT AND HAVING DEPOSITED THEREON A FINELY DIVIDED PLATINUM METAL, AND CIRCUIT MEANS CONNECTING SAID AUXILIARY ELECTRODE WITH SAID CATHODE THROUGH SAID PRESSURE CONTROLLED SWITCH, WHERECY SAID PRESSURE CONTROLLED SWITCH CONNECTS SAID AUXILIARY ELECTRODE TO SAID CATHODE WHEN THE INTERNAL PRESSURE OF THE BATTERY IS IN EXCESS OF A PREDETERMINED PRESSURE AND DISCONNECTS SAID AUXIALITY ELECTRODE FROM SAID CATHODE WHEN THE INTERNAL PRESSURE IS BELOW SAID PREDETERMINED PRESSURE.