Stop motion system for high speed looms and the like

Details Stop motion system for high speed looms and the like Stop motion system for high speed looms and the like

D - Textiles, Paper

03

D

139/35

D03D 51/28 (2006.01)

Patent

CA 1069024

ABSTRACT OF THE DISCLOSURE Automatic loom stopping apparatus for use with a loom for detecting warp yarn breakage or improper shedding and actuate the loom stop motion means of the loom, comprising light beam emitter and detector means positioned adjacent the warp yarn path toward the supply end from the weaving zone of the loom forming a monitor light beam transversely spanning the open shed, the detec- tor means providing a detector defect signal when any portion of a warp yarn or broken end interrupts the monitor light beam, ampli- fier and comparator circuitry for producing a processed defect signal responsive to the detector defect signal, timing pulse forming circuitry including a sensor monitoring rotation of the loom drive shaft for producing timing pulses indicating a pre- determined phase time in the cycle of operation of the loom applied to a gate control pulse generator to produce short duration window pulses when the shed is in predetermined open condition, and first and second gate circuits conditioned by the window pulses and by start-up delay signals to produce an output signal for stopping the loom when a predetermined number of successive valid defect signals occur.

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