(under subclass 68) Implement provided with means by which the cam element may be moved radially out of camming engagement with the helical camming surface so as to permit relative axial movement of the camming member independent of any relative rotation.
(1) Note. Disengagement of the screw feed members, for this subclass, requires more than merely unscrewing the members until they reach the end of their threaded engagement. The disengaging means must allow the members the same telescoping movement, without relative rotation, as is achieved by the relative rotation.
(2) Note. A patent to a pencil with feed means comprising a split nut and a threaded rod, and means to open said nut and allow it to slide axially along said rod, will be placed in this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
62, for an implement having disengageable screw-feed means and additional means to retract the tool.
