Electromagnetic blocking unit for a weft storage drum

Details Electromagnetic blocking unit for a weft storage drum Electromagnetic blocking unit for a weft storage drum

1989-10-16

1991-05-21

Falik, Andrew M.

Textiles: weaving

Weft manipulation

Weaving with stationary weft supply

335256, 335257, D03D 4736

Patent

active

050166816

ABSTRACT:
An electromagnetic unit coacts with the winding drum of a weft feeding device to control unwinding of weft yarn from the drum. The electromagnetic unit comprises a movable stem surrounded by a pair of adjacent coaxial electromagnetic coils. Energization of one coil causes the stem to move into a position where it blocks unwinding of the yarn, whereas energization of the other coil retracts the stem and permits free unwinding of the yarn.

REFERENCES:
patent: 778021 (1904-12-01), Feingold
patent: 2246855 (1941-06-01), Miessner
patent: 3235777 (1966-02-01), Hatashita
patent: 4486728 (1984-12-01), Hastings et al.
patent: 4632155 (1986-12-01), Maina

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