US4393725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus to measure yarn tension
Assignee: Milliken Research Corp
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Filing: 1981-02-23
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Granted: 1983-07-19
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Expires: 2001-02-23
Abstract
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.
Inventors
- 👤 Larry S. Satterfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:13
CPC Classifications
G; G01; G01L; G01L5/00; G01L5/04; G01L5/042; B; B65; B65H; B65H59/00; B65H59/40; G01H; G01H13/00; B65H2511/00; B65H2511/50; B65H2511/52; B65H2557/00; B65H2557/60; B65H2557/61; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
125 words
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.
Claim 2
Dependent Claim
125 words
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.
Claim 3
Dependent Claim
20 words
The apparatus of claim 1 wherein said means to supply air is an air jet located adjacent said second means.
Claim 4
Dependent Claim
100 words
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.
Claim 5
Dependent Claim
100 words
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.
Claim 6
Dependent Claim
19 words
The apparatus of claim 3 wherein said second means includes a U-shaped detector member through which the yarn passes.
References Cited (Backward Citations)
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GB883874A
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US3273380A
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US3486369A
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US3854329A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-18 | 1987-01-17 | 1987-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-18 | 1991-01-17 | 1991-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-18 | 1995-01-17 | 1995-07-19 | $7700.00 | Window Closed / Lapsed |