Weft thread monitoring device

Details Weft thread monitoring device Weft thread monitoring device

1978-02-02

1979-05-22

Jaudon, Henry

Textiles: weaving

Stopping

Weft

D03D 5134

Patent

active

041553810

ABSTRACT:
A weft thread monitoring device comprises a carrier element, such as a push rod, that is moved in one direction relative to the loom frame by beating-up motion of the reed and is biased in an opposite return direction. A feeler that is carried for bodily motion by the carrier element and is movable relative to it has a sensing arm that is engaged by a weft thread during beat-up and a controlled arm cooperable with an actuator for a cut-off switch. The feeler is biased relative to the carrier element towards an actuating position in which its controlled arm can engage the actuator during return motion of the carrier element and move the actuator to stop the loom. However, if the sensing arm is held captive by a properly laid and beaten-up weft thread, the feeler is maintained, against its bias, in a position in which the controlled arm clears the actuator during carrier element return motion, and at the conclusion of such return motion the sensing arm is snapped out of engagement with the weft thread.

REFERENCES:
patent: 2819737 (1958-01-01), Opl et al.
patent: 3145739 (1964-08-01), Metzler
patent: 3570551 (1971-03-01), Deborde
patent: 4009737 (1977-03-01), Rouhr et al.
patent: 4063575 (1977-12-01), Santi

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