(under subclass 413) Subject matter wherein the detector acts in response to a change in the radial dimension of wound material as measured from an axis of rotation of the winding coil.
SEE OR SEARCH THIS CLASS, SUBCLASS:
333.5, and 334.5, for a coil diameter sensor for a machine convertible information carrier.
421.2, for a coil diameter sensor used in a supply coil brake control.
SEE OR SEARCH CLASS
200, Electricity: Circuit Makers and Breakers,
61.15, for a switch designed to be actuated in response to a quantity of wound material.