Continuous measurement of yarn twist

PCT No. PCT/AU83/00109 Sec. 371 Date Apr. 12, 1984 Sec. 102(e) Date Apr. 12, 1984 PCT Filed Aug. 12, 1983 PCT Pub. No. WO84/00781 PCT Pub. Date Mar. 1, 1984.A method and apparatus for non-destructively measuring twist in a translating yarn (2) by means of a blade (1) which is in rubbing contact with...

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Bibliographische Detailangaben
Hauptverfasser:	WOO, JAE L, FARAH, BOSHRA D
Format:	Patent
Sprache:	eng
Schlagworte:	CABLES OTHER THAN ELECTRIC INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS NATURAL OR ARTIFICIAL THREADS OR FIBRES PHYSICS ROPES ROPES OR CABLES IN GENERAL SPINNING SPINNING OR TWISTING TESTING TEXTILES
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Zusammenfassung:	PCT No. PCT/AU83/00109 Sec. 371 Date Apr. 12, 1984 Sec. 102(e) Date Apr. 12, 1984 PCT Filed Aug. 12, 1983 PCT Pub. No. WO84/00781 PCT Pub. Date Mar. 1, 1984.A method and apparatus for non-destructively measuring twist in a translating yarn (2) by means of a blade (1) which is in rubbing contact with the translating yarn (2) so that vibrations are imparted to the blade (1). The frequency of vibration of the blade (1) provides a measure of the twist imparted to the yarn (2) so that the signal frequency can be used as a measurement of the twist in a yarn (2) under test or as a feedback signal controlling the rate of twist imparted by a twist insertion station(8) during the formation of a yarn.