Apparatus for sensing characteristics of a traveling yarn with y

Details Apparatus for sensing characteristics of a traveling yarn with y Apparatus for sensing characteristics of a traveling yarn with y

1988-12-22

1990-11-13

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356238, G01V 500, G01N 2100

Patent

active

049704028

ABSTRACT:
An apparatus for guiding traveling yarn through a slot in which characteristics of the yarn are sensed, includes a pair of members having surfaces engaging the traveling yarn. The surfaces of the members are spaced from the slot, in respective opposite directions, by an amount sufficient to permit circulation of a fluid therebetween for removing dust and other debris, thereby reducing the distortion of the sensing of the yarn caused by the dust and other debris. The first and second members can be integrally formed from the housing which includes the slot.

REFERENCES:
patent: 2991685 (1961-07-01), Van Dongeren
patent: 3158852 (1964-11-01), Schacher
patent: 3712743 (1973-01-01), Harris et al.
patent: 4311916 (1982-01-01), Schenkel
patent: 4341958 (1982-07-01), Ohsawa
patent: 4608496 (1986-08-01), Rosen
patent: 4691647 (1987-09-01), von Stein
patent: 4739176 (1988-04-01), Allen et al.
patent: 4743749 (1988-05-01), Grundy
patent: 4754722 (1988-07-01), Rohr et al.
patent: 4812043 (1989-03-01), Vanstaen

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