(under subclass 52) Apparatus which operates to open or close a circuit in response to the motion of a fixedly supported mechanical tentacle or movable obstruction (feeler), which motion is brought about by the presence of an object moving through the zone of operation of such feeler.
SEE OR SEARCH THIS CLASS, SUBCLASS:
61.13+, for switch-actuating detectors or feelers responsive to the presence or absence of a running length of web or strand material.
