Method for determining the position and shape of a yarn fed to a

Details Method for determining the position and shape of a yarn fed to a Method for determining the position and shape of a yarn fed to a

1992-06-17

1994-03-01

Messinger, Michael

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356429, G01N 2186

Patent

active

052910245

ABSTRACT:
A method and device for determining the state of a movement or stoppage of a yarn fed to a textile machine in which a variation in the shape and/or position of the yarn relative to an optical sensor in front of which the yarn runs during its feed to the textile machine is determined. On the basis of this variation, an output electrical signal is generated and is used for operating an operating member of the textile machine such as an indicator for indicating the state of movement of the yarn, a machine control circuit or a similar operating member. The method is implemented by an optical sensor which generates at least one output which is a variable electrical signal on the basis of a variation in the shape and/or position of the yarn relative to the sensor. The signal is compared with a reference signal in order to operate a switch device which causes the output electrical signal to be generated.

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