Yarn brake for a textile yarn processing machine

Details Yarn brake for a textile yarn processing machine Yarn brake for a textile yarn processing machine

1980-01-29

1981-11-03

Petrakes, John

Textiles: spinning, twisting, and twining

Apparatus and processes

Unitary multiple twist devices

57279, 242147M, 242149, D01H 786, D01H 1310, D01H 1500

Patent

active

042978343

ABSTRACT:
The yarn brake of this invention is useful in a textile yarn processing machine, such as a two-for-one twister, and includes a stationary permanent magnet arranged at one end of a brake housing and spaced from a fixed braking surface in the direction of movement of the yarn. A braking body is movably positioned within the housing between the braking surface and the permanent magnet, with the braking body including a permanent magnet having a magnetic polarization oriented in repelling relation to the stationary permanent magnet for thus biasing the braking body toward and into engagement with the braking surface to apply tension to a yarn passing therebetween. The magnetic repelling forces allow the braking body to be reliably moved out of engagement with the braking surface when necessary, as for example by a pneumatic flow applied to thread a yarn through the brake, or to accommodate knots or other variations in thickness in the yarn.

REFERENCES:
patent: 2620617 (1952-12-01), Bley
patent: 2667029 (1954-01-01), Uhlig
patent: 2827756 (1958-03-01), Kellogg et al.
patent: 3309858 (1967-03-01), Franzen
patent: 3352510 (1967-11-01), Franzen
patent: 3410071 (1968-11-01), Heimes
patent: 3975893 (1976-08-01), Franzen
patent: 4168605 (1979-09-01), D'Agnolo

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