Manually operated, multi-button interlocking pushbutton key set

Claim 1

A MANUALLY OPERATED, MULTI-BUTTON KEY SET COMPRISING A ROW OF A PLURALITY OF TWO-POSITION PUSHBUTTONS ADJACENT CONTACT SPRING ASSEMBLIES, SAID PUSHBUTTONS BEING ADAPTED TO MOVE TO EITHER A RAISED OR A LOWERED POSITION, SAID SPRINGS BEING CLOSED BY SAID BUTTONS WHEN IN SAID LOWERED POSITION AND OPENED BY SAID BUTTONS WHEN IN SAID RAISED POSITIONS, AND MEANS COMPRISING A STANDARDIZED THREE-PUSHBUTTON LOGIC COMPONENT FOR LINKING NON-ADJACENT KEYS SO THAT EITHER ONE OF SAID TWO NON-ADJACENT KEYS MAY BE PUSHED INDIVIDUALLY BUT BOTH OF SAID TWO KEYS MAY NOT BE PUSHED SIMULTANEOUSLY, SAID COMPONENT COMPRISING A PLATE HAVING A PAIR OF OPPOSITELY DISPOSED CAM SHOULDERS INCLUDING AN INCLINED PROFILE WHICH TRANSLATES DOWNWARD MOTION FROM ONE OF SAID NON-ADJACENT PUSHBUTTONS INTO UPWARD MOTION ON THE OTHER OF SAID NON-ADJACENT PUSHBUTTONS, AND A CUTOUT PORTION IN SAID PLATE FOR PRECLUDING OPERATION OF INTERMEDIATE PUSHBUTTONS BY SAID NON-ADJACENT PUSHBUTTONS.