Yarn tension sensor

Details Yarn tension sensor Yarn tension sensor

1986-02-26

1987-07-07

Levy, Stewart J.

Measuring and testing

Dynamometers

Responsive to force

73 1B, G01L 510, G01L 2500

Patent

active

046778608

ABSTRACT:
A yarn tension sensor is disclosed which is adapted for use with a textile yarn processing machine. The sensor includes a spring arm which is contacted by a running yarn, and such that the tension in the yarn acts to deflect the arm. In order to render the deflection of the arm relatively insensitive to external or machine vibrations, while permitting an accurate response to fluctuations in yarn tension, there is provided a structure for damping the spring arm, which includes a magnetic fluid having a portion of the spring arm immersed therein.

REFERENCES:
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patent: 2383537 (1945-08-01), Elvin et al.
patent: 2407545 (1946-09-01), Fish
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patent: 3005332 (1961-10-01), McClintock
patent: 3206972 (1965-09-01), Brys
patent: 3376738 (1968-04-01), Biffle
patent: 3771346 (1973-11-01), Huslin, Jr.
patent: 3880001 (1975-04-01), Hogan
patent: 4182167 (1980-01-01), Nokoyama et al.
patent: 4182169 (1980-01-01), Bardy
"Magnetic Fluid Seals"; Laser Focus Magazine, Apr. 1979; 4 page reprint of pp. 56-63; Kuldip Raj et al.
"Tension Sensor for Flexible Media"; IBM Technical Disclosure Bulletin; vol. 15, No. 7, pp. 2257-2258; M. L. Nettles.

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