Electrical warp thread-monitoring apparatus for a loom

Details Electrical warp thread-monitoring apparatus for a loom Electrical warp thread-monitoring apparatus for a loom

1980-08-15

1983-02-08

Kee Chi, James

Textiles: weaving

Stopping

Warp

28187, 66163, 34087001, D03D 5128

Patent

active

043723462

ABSTRACT:
An electrical warp thread-monitoring apparatus for a loom wherein a multiplicity of warp threads each carry a drop wire which, in the presence of thread rupture, connects a pair of current rails which are mutually electrically insulated from one another, and thus, closes an alternating-current circuit. The alternating-current circuit possesses at its input side an alternating-current voltage source which can be connected by means of a bridge rectifier with the current rails. This bridge rectifier or rectifier circuit forms the input of a voltage-dependent pulse converter following which there is connected in circuit a RC-integration stage and a threshold value-switching stage, which also then produce a shutdown or stop signal when the contact locations are contaminated and prevent generation of a shutdown or stop signal when contaminants, leakage currents and dancing drop wires produce short pulses.

REFERENCES:
patent: 3324899 (1967-06-01), Stagg, Jr.
patent: 3625243 (1971-12-01), Hansen et al.
patent: 3863241 (1975-01-01), Kamiyamaguchi et al.
patent: 4178590 (1979-12-01), Weidmann

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