Apparatus for exclusive actuation of selected ones of a plurality of mechanisms

Claim 1

IN APPARATUS HAVING A PLURALITY OF LINEARLY MOVABLE ACTUATING KEYS ARRANGED IN ROWS WITHIN A CASE, THE COMBINATION COMPRISING LOCK SHOULDER MEANS ON EACH KEY, AN INTERLOCK STRIP ADAPTED AT EACH OF ITS ENDS TO ENGAGE A LOCK SHOULDER MEANS OF AN ACTUATING KEY, A FIRST ROTATABLE ARM PIVOTABLY ATTACHED AT ONE OF ITS ENDS TO ONE END OF THE INTERLOCK STRIP AND AT ITS OTHER END TO A PIVOT SUPPORT, AND A SECOND ROTATABLE ARM PIVOTABLY ATTACHED AT ONE OF ITS ENDS TO THE OTHER END OF THE INTERLOCK STRIP AND AT ITS OTHER END TO A PIVOT SUPPORT, THE SPACING BETWEEN THE PIVOT SUPPORTS WITH RESPECT TO THE SPACING OF THE POINTS OF ATTACHMENT TO THE INTERLOCK STRIP BEING SO RELATED THAT THE DISPLACEMENT OF ONE END OF AN INTERLOCK STRIP DUE TO A PRESSED ACTUATING KEY IN THE DIRECTION OF KEY MOVEMENT IS GREATER THAN IS THE OPPOSITE DISPLACEMENT OF THE OTHER END OF THE INTERLOCK STRIP IMPOSED BY THE ARM LINKAGE OF THE STRIP.