Device for detecting yarn

Details Device for detecting yarn Device for detecting yarn

1989-11-21

1991-05-21

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

57 81, G01N 2186

Patent

active

050177974

ABSTRACT:
A device for detecting a doubled yarn includes a detecting device having photoelectric sensors disposed in a plane perpendicular to a running path of a yarn provided in a housing such that beams of light projected from light projecting elements may reach light receiving elements in a perpendicularly intersecting relationship to each other. A calculating device totals up the sensed amounts individually detected by the light receiving elements of the photoelectric sensors and comparing the added up value with a reference value to detect a break of one or more of the single yarns of the doubled yarn.

REFERENCES:
patent: 2991685 (1961-07-01), Van Dongeren
patent: 4311916 (1982-01-01), Schenkel
patent: 4404791 (1983-09-01), Wolf et al.

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