Cell circuit interrupter

Claim 1

A sealed galvanic cell comprising a conductive container having an upstanding wall open at one end and closed at the opposite end and including in said container a positive electrode, a negative electrode and an electrolyte, said conductive container being in electrical contact with one of said electrodes; a first cover mounted over, secured to and electrically insulated from said open end of said conductive container and in electrical contact with the other electrode; a conductive member comprising a central protrusion portion with an extending flange disposed over and electrically insulated from the container; a conductive ring member disposed over the conductive member with the protrusion portion extending through and electrically contacting the wall defining an opening int he ring member, said protrusion portion making a friction fit with the wall, said conductive ring member having an inner segment disposed over and electrically insulated from the flange of the conductive member by a discreet nonconductive material that is disposed between the conductive member and the bottom surface of the inner segment, said conductive ring member further (and) having a peripheral segment secured to and in electrical contact with the conductive container thereby securing and electrically contacting the conductive member to the conductive container thereby adapting the conductive member as a terminal for the cell; and wherein he closed end of the container will bulge upon a predetermined pressure building up within the container to force the central protrusion portion of he conductive member outward thereby breaking the electrical contact between the wall defining the opening in the conductive ring and the protrusion of the conductive member.