Broken yarn detector for multiple yarn manipulating machines

Details Broken yarn detector for multiple yarn manipulating machines Broken yarn detector for multiple yarn manipulating machines

1989-12-12

1991-04-09

Schroeder, Werner H.

Sewing

Elements

Starting or stopping

66163, 139353, D05B 6936, B65H 63024

Patent

active

050055038

ABSTRACT:
A textile machine having a multiplicity of yarn manipulating instrumentalities includes a yarn break detector. The specific machine disclosed is a tufting machine having a multiplicity of reciprocable needles threaded with respective yarns supplied from a source and the yarn break detector includes at least one metal washer carried by a respective yarn between the needles and the source. The washers are mounted above a trough having first and second spaced apart strips of electrical conducting members formed in a Vee configuration having a small gap between the plates at the lower apex of the Vee. The plates are connected in an electrical circuit which is maintained open by the gap until a yarn is broken and the washer carried thereon drops into the trough to short the plates together and close the circuit. The circuit includes a relay which energizes an indicator light and deenergizes the tufting machine motor when a yarn is broken. A series of such detectors may be mounted laterally adjacent each other beneath the yarns to provide an indication of the location where the broken yarn occurred by means of an indicator light associated with each detector.

REFERENCES:
patent: 2734362 (1953-03-01), Schick
patent: 3529560 (1969-01-01), Jackson
patent: 3687095 (1972-08-01), Jackson
patent: 3764773 (1973-10-01), Merkle
patent: 4372346 (1983-02-01), Hutter
patent: 4522139 (1985-06-01), Beverly
patent: 4791967 (1988-12-01), Vandeweghe et al.

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