Apparatus for sensing yarn movement and for signaling breakage o

Details Apparatus for sensing yarn movement and for signaling breakage o Apparatus for sensing yarn movement and for signaling breakage o

1991-09-23

1993-04-27

McGraw, Vincent P.

Optics: measuring and testing

By monitoring of webs or thread

For flaws or imperfections

250561, 356238, G01N 2189

Patent

active

052067092

ABSTRACT:
Yarn is guided along a linear path through a light beam which is directed toward a photoelectric detector. Non-uniformities in the surface texture of the yarn cause the intensity of the light received by the detector to fluctuate rapidly as long as the yarn is moving. If the yarn stops moving as a result of breakage, the intensity of the light remains constant, and the detector produces an electrical signal indicative of the breakage.

REFERENCES:
patent: 4027982 (1977-06-01), Ohishi
patent: 4341958 (1982-07-01), Ohsawa

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