(under subclass 83) Subject matter having the rotatable feed control member mounted in a movable frame and having the means for controlling the feed connected to the frame to move it, the rotatable member being brought into engagement with
the gear-detent or brake when the frame is moved in one direction to prevent rotation of the rotatable member and being disengaged from the gear-detent or brake when the frame is moved in the other direction thereby permitting the rotatable member to rotate and feed the electrode.
(1) Note. In most of the devices in this subclass when the frame is moved in the direction in which the gear-detent or brake engages with the rotatable member, the gear-detent or brake will prevent the periphery of the rotatable member from moving with respect to the gear-detent or brake during at least part of such frame movement, thereby (1) causing rotation of the rotatable member about its on axis, the rotary motion of the rotatable member being transmitted to the electrode to move the electrode in the separating direction and/or (2) moving the electrode in the separating direction by the lifting action of the frame movement.
SEE OR SEARCH CLASS
74, Machine Element or Mechanism,
126, for intermittent grip type mechanical movements of general application operating in an analogous manner to the subject matter of this subclass.
