The fault being detected by an individual thread detector which affects an electric circuit on being displaced.
SEE OR SEARCH CLASS
66, Textiles: Knitting,
161, and the classes referred to in the notes thereto.
200, Electricity: Circuit Makers and Breakers,
61.13+, for electrical switches which are controlled by threads or strands; see subclass 61.14 where the switch is controlled by a knot or change in diameter of the thread or strand, and subclass 61.18 where the switch is controlled by the slack, breakage, run out or failure to travel along its intended path.