Apparatus of stopping operation of a weaving loom

An apparatus for stopping the operation of a weaving loom when woven fabric of the weaving loom lacks a weft yarn completely inserted, said apparatus comprising,

• first means for sensing the tension in a warp yarn existing between a back rest roller of a weaving loom and the fell of the woven fabric at each beat-up and for generating a first signal having a value representative of the sensed tension in the warp yarn,
• second means comprising comparator means electrically connected to said first means for receiving said first signal therefrom for comparing the value of said first signal from said first means with a reference value and for generating a second signal when the value of said first signal is greater than said reference value,
• a pulse generator for generating successive pulse signals each generated at each successive cycle of the weaving loom, and
• third means comprising
• means electrically connected to said pulse generator for receiving said pulse signals therefrom for adding said pulse signals on one-by-one reception of said pulse signals to obtain a total thereof at each reception of each of said pulse signals;
• means electrically connected to said second means for receiving said second signal therefrom for restoring said total to zero in response to said second signal from said second means, and
• means for generating a third signal for stopping the operation of the weaving loom when said total has reached a predetermined number exceeding two.