Yarn break detector for spinning and weaving machines

Details Yarn break detector for spinning and weaving machines Yarn break detector for spinning and weaving machines

1987-06-17

1988-08-30

Levy, Stewart J.

Communications: electrical

Condition responsive indicating system

Specific condition

73160, G01R 2912, G08B 2100

Patent

active

047680261

ABSTRACT:
The present invention provides a yarn break detector for spinning and weaving machines comprising at least one pair of detection electrodes, AC amplifiers of high input impedance, a balancer, a differential amplifier, a rectifier and a relay circuit. At least one pair of detection electrodes induce an electric charge on the yarn, and the induced electric potential is amplified, rectified and smoothed. In the event of yarn break or stoppage of yarn run, the relay circuit is activated on sensing the level difference between the high-potential DC voltage generated during normal run of yarn and the low-potential DC voltage generated at the time of yarn break or stoppage of yarn run, and an output signal is issued as yarn break signal, informing of the yarn break or stoppage of yarn run.

REFERENCES:
patent: 2774061 (1956-12-01), Breuning
patent: 3731069 (1973-05-01), Goto et al.
patent: 3863241 (1975-01-01), Kamiyamaguchi
patent: 4311958 (1982-01-01), Aeppli
patent: 4420697 (1983-12-01), Fiedler et al.

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