mechanical device of toggle; and locking operazio ni mutually exclusive mutually

摘要

A mechanical switching and ratchet device of the type for carrying out mutually exclusive functions, for example for selective needle bed shogging on flat knitting machines. A plurality of selector jacks are longitudinally slidable on a jack guide and each has associated with it a switch jack. A ball blocking device permits any one, but only one of the selector jacks to be moved longitudinally at any given time. When a selector jack is moved, it carries with it its switch jack which switch jack remains in the moved position even though its selector jack then moves back to its original position. A locking pawl is provided for holding the switch jacks in the original or the moved positions thereof.