(under subclass 246) Device including an internally threaded element, coacting with the rotated element and serving as a reaction member to effect axial movement of the rotated element, which internally threaded element is not integral with the holding device frame and thus capable of being interchanged with other elements if necessary or desired.
(1) Note. This substitution feature is usually for the purpose of wear correction or to facilitate assembly.
(2) Note. See the illustration is subclass 247 above wherein the nut-like element 3 is dovetailed in the vise frame so as to be replaceable if necessary.
SEE OR SEARCH THIS CLASS, SUBCLASS:
247, for patents to a holder with traveling screw actuator within a box-beam guide which type of holder usually has a replaceable nut. Generally, no cross-references of this feature have been made to this (248) subclass.
