(under subclass 172) Method or apparatus wherein means are provided to perceive variations in a characteristic which deviate from a set norm, which means activates or regulates additional means to alter the operation of warp preparing or handling device.
(1) Note. Those devices employing means to regulate the speed at which a warp sheet is taken up by a beam in response to sensed sheet tension will be found herein.
SEE OR SEARCH CLASS
226, Advancing Material of Indeterminate Length,
10+, for means for advancing a running length of work which means is provided with means responsive to the condition of the running length.
242, Winding, Tensioning, or Guiding,
472.9+, 479.9+, 484.8, and 484.9+ for a helical winding device having a detector or stop and subclasses 333+ for an automated stop in a magnetic tape or image film winding device.
