Method of obtaining a thread running signal

Details Method of obtaining a thread running signal Method of obtaining a thread running signal

1992-04-10

1992-11-17

Ng, Jin F.

Communications: electrical

Condition responsive indicating system

Specific condition

310323, 340668, G08B 2100

Patent

active

051647109

ABSTRACT:
In a method of obtaining a thread tension signal a sensor in the form of a piezofoil is attached to a thread guide or to its mounting and delivers a signal which reflects, amongst other things, the oscillations induced in the thread guide by the thread movement. In order to obtain a signal which corresponds to the thread tension either the frequency of an element which winds up the thread and/or harmonics of this frequency is filtered out of the sensor signal and the level of this frequency or the level of these frequencies is measured.

REFERENCES:
patent: 3844101 (1974-10-01), Schwartz
patent: 4110654 (1978-08-01), Paul
patent: 4361777 (1982-11-01), Mettler

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