US3869770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tight warp detector
Assignee: Deering Milliken Research Corp
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Filing: 1973-08-10
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Granted: 1975-03-11
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Expires: 1993-08-10
Abstract
Abstract Apparatus and method to detect a highly tensioned warp yarn being supplied to a textile machine. The warp yarn sheet is scanned to detect a warp yarn or yarns under excessive tension to stop the operation of the textile machine prior to breakage of the detected highly tensioned yarn or yarns and/or damaging stretch in the yarn producing streaks in the fabric produced therefrom.
Inventors
- 👤 Robert W Mccullough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:52
CPC Classifications
D; D02; D02H; D02H13/00; D03; D03D; D03D51/00; D03D51/18; D03D51/20; D03D51/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A stop motion for a warp yarn take-up machine and warp beam, the rotation of which advances a plurality of yarn ends comprising: a light source, a photocell spaced from said light source, a plurality of drop wires located between said light source and said photocell operably associated with said yarn end, limiting means located under said drop wires to limit the downward movement thereof, the weight of said drop wires being greater than the desired tension in said yarn causing the drop wires to contact said limiting means, drive means driving said warp beam and control means operably associated with said photocell and said drive means to cut off said drive means when the tension of any of the yarn ends exceeds the desired valve and raises its associated drop wire between said light source and said photocell.
Claim 2
Dependent Claim
139 words
A stop motion for a warp yarn take-up machine and warp beam, the rotation of which advances a plurality of yarn ends comprising: a light source, a photocell spaced from said light source, a plurality of drop wires located between said light source and said photocell operably associated with said yarn end, limiting means located under said drop wires to limit the downward movement thereof, the weight of said drop wires being greater than the desired tension in said yarn causing the drop wires to contact said limiting means, drive means driving said warp beam and control means operably associated with said photocell and said drive means to cut off said drive means when the tension of any of the yarn ends exceeds the desired valve and raises its associated drop wire between said light source and said photocell.
References Cited (Backward Citations)
US2825119A
Cited
US2844860A
Cited
US2814088A
Cited
US2967947A
Cited
US3447213A
Cited
US3717771A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |