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US 4,393,725 AGranted
Apparatus to measure yarn tension
AssigneeMilliken Research Corporation
InventorLarry S. Satterfield
Life of this patent
Estimating the term…
Abstract
Apparatus to cause a running length of yarn to vibrate at its harmonic frequency and to electronically measure the harmonic frequency thereof to provide a signal which can be employed to maintain and/or correct the parameters of the system to maintain a desired tension in the yarn being run.
Claims4
Apparatus to measure the tension in a running length of yarn comprising:
- a frame, at least one pair of guide members attached to said frame and longitudinally spaced from one another to guide yarn from one end of said frame to the other end of said frame, means mounted to said frame to supply air under pressure against the yarn passing between said guide members to cause said yarn to vibrate at its harmonic frequency and a second means mounted in said frame to measure the harmonic frequency of the yarn as it passes through said guide members, said second means including a U-shaped detector through which the yarn passes and means to allow adjustment of said U-shaped detector relative to the yarn passing therethrough.
Apparatus to measure the tension in a running length of yarn comprising:
- a frame, at least one pair of guide members attached to said frame and longitudinally spaced from one another to guide yarn from one end of said frame to the other end of said frame, air jet means mounted to said frame to supply air under pressure against the yarn passing between said guide members to cause said yarn to vibrate at its harmonic frequency and a second means mounted in said frame to measure the harmonic frequency of the yarn as it passes through said guide members.
Dependencies are inferred from the claim text.