System for controlling supply of yarn to a yarn utilization appa

Details System for controlling supply of yarn to a yarn utilization appa System for controlling supply of yarn to a yarn utilization appa

1989-07-14

1990-09-04

Schroeder, Werner H.

Textiles: knitting

Feeding

Positive

364470, D04B 1538, B65H 5938

Patent

active

049533673

ABSTRACT:
A yarn utilizing machine, in particular a circular knitting machine, having a plurality of yarn utilizing stations is provided with a corresponding number of supply means for the yarn. At each supply station, there is a yarn tension or yarn supply quantity monitoring device that cooperates with the yarn. This monitoring device includes a transducer cooperating with the yarn as well as a measuring circuit that emits a signal corresponding to the monitored parameter. To enable recognition of only the deviation of one parameter, independent of the absolute value of the parameter, means are provided for generating a reference value, which is dependent on the measured signals of all the measuring circuits. Each yarn utilizing station or each yarn supply means is provided with a deviation signal circuit, which has two inputs; at least a portion of the reference value is fed into one of the inputs, while at least a portion of the measured signal is fed into the other input. The deviation signal circuit emits a signal only if the reference value and the measured value deviate from one another by more than a fixed amount.

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patent: 4819310 (1989-04-01), Beerli et al.
patent: 4821199 (1989-04-01), Kuhnert
patent: 4829790 (1989-05-01), Memminger et al.
patent: 4839815 (1989-07-01), Eaton et al.

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