Capacitive thread stopping motion

Details Capacitive thread stopping motion Capacitive thread stopping motion

1978-01-06

1982-01-19

Karlsen, Ernest F.

Electricity: measuring and testing

Conductor identification or location

Inaccessible

28227, 57265, 73160, 340677, G01R 2726, B65H 6306, G01L 504

Patent

active

043119581

ABSTRACT:
A method and device for detecting the presence of a running thread takes advantage of the inherent physical irregularities of the thread to generate an alternating current signal as the thread passes through a capacitive element. The variations in capacitance resulting from the running thread are detected and amplified as an alternating current electrical signal, which disappears instantly with thread stoppage or breakage.

REFERENCES:
patent: 2671199 (1954-03-01), Truitt
patent: 3031616 (1962-04-01), Hummel
patent: 3657644 (1972-04-01), Beam et al.

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