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

1978-04-06

1979-12-11

Jaudon, Henry

Textiles: weaving

Stopping

Warp

250561, 139352, D03D 5128, G01N 2128

Patent

active

041778383

ABSTRACT:
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 detector means providing a detector defect signal when any portion of a warp yarn or broken end interrupts the monitor light beam, amplifier 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 predetermined 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.

REFERENCES:
patent: 3379225 (1968-04-01), Ichimi et al.
patent: 3818236 (1974-06-01), Lind et al.
patent: 3824401 (1974-07-01), Suzuki
patent: 3833816 (1974-09-01), Emura et al.
patent: 3902534 (1975-09-01), Nishiguchi et al.
patent: 3989068 (1976-11-01), Kakinaka

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