Push button mechanism with interlocking apparatus and energizing means therefor

Claim 1

AN ELECTRIC CIRCUIT CONTROL SWITCH COMPRISING, A FACE PLATE, A FRAME STRUCTURE CONNECTED IN SPACED RELATION WITH SAID FACE PLATE, A PLURALITY OF PUSH BUTTON MEMBERS CONNECTED IN SIDE-BY-SIDE RELATION AND SLIDABLY CONNECTED AT OPPOSITE ENDS TO SAID FACE PLATE AND SAID FRAME STRUCTURE FOR AXIAL MOVEMENT, AN INDIVIDUAL CONTACT MEMBER CONNECTED TO EACH OF SAID PUSH BUTTON MEMBERS BETWEEN SAID FRAME STRUCTURE AND SAID FACE PLATE FOR MOVEMENT THEREWITH, FIRST AND SECOND STATIONARY CONTACTS FOR EACH OF SAID PUSH BUTTON MEMBERS INSULATINGLY SUPPORTED ON SAID FRAME STRUCTURE, SAID FIRST AND SECOND STATIONARY CONTACTS HAVING CONTACT PORTIONS DISPOSED SUBSTANTIALLY PARALLEL WITH THE AXES OF SAID PUSH BUTTON MEMBERS AND EXTENDING INTO SLIDING CONTACT WITH THE RESPECTIVE CONTACT MEMBERS, SAID CONTACT MEMBER OF EACH PUSH BUTTON MEMBER AND SAID FIRST AND SECOND STATIONARY CONTACTS OF EACH PUSH BUTTON MEMBER CONNECTED TO FORM A NORMALLY CLOSED SERIES CIRCUIT, FROM ONE END OF THE CONTROL SWITCH TO THE OTHER END THEREOF, SAID CONTACT PORTIONS OF SAID FIRST STATIONARY CONTACTS BEING OF A LENGTH TO REMAIN IN SLIDING CONTACT WITH THE RESPECTIVE CONTACT MEMBERS THROUGHOUT THE AXIAL MOVEMENT OF THE RESPECTIVE PUSH BUTTON MEMBERS, AND SAID CONTACT PORTIONS OF SAID SECOND STATIONARY CONTACTS BEING RELATIVELY SHORT, WHEREBY UPON DEPRESSING ONE OF SAID PUSH BUTTON MEMBERS THE SERIES CIRCUIT BETWEEN THE RESPECTIVE CONTACT MEMBER AND SECOND STATIONARY CONTACT IS BROKEN WHILE CONTACT WITH THE RESPECTIVE FIRST STATIONARY CONTACT IS MAINTAINED.