Method of detecting a broken yarn in a row of line up yarns and

Details Method of detecting a broken yarn in a row of line up yarns and Method of detecting a broken yarn in a row of line up yarns and

1986-03-25

1988-09-20

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

377 53, G01V 904

Patent

active

047728000

ABSTRACT:
A method and apparatus for detecting a broken line up yarn, wherein a fine beam is adapted to travel widthwise across a row of line up yarns while it is radiated toward the yarns to cause flickerings which are photoelectrically converted to instantly count the current value for the number of yarns. The current value is compared with a standard threshold value, and if the current value is different from the threshold, an alarm signal is emitted indicating an abnormal condition. The present invention can be used as a broken yarn detecting technique for devices dealing with many line up yarns such as a warp knitting machine, a loom, a warping machine and so on.

REFERENCES:
patent: 3345812 (1967-10-01), Pickering
patent: 3595004 (1971-07-01), Saunders
patent: 3595005 (1971-07-01), Saunders
patent: 3612702 (1971-10-01), Troll
patent: 3676009 (1972-07-01), Brendemuehl
patent: 4522497 (1985-06-01), Ikin

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