US3877209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for measuring the draft of open-end spinning machines
Assignee: Elitex Zavody Textilniho
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Filing: 1973-09-17
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Granted: 1975-04-15
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Expires: 1993-09-17
Abstract
Abstract An open end spinning unit having rotary feed means for delivering fibrous material, a rotary twisting means for spinning the fibers into a yarn and a rotary withdrawing means for taking up the yarn. A first detector means is located to sense the rotation of the withdrawal means and providing an output having a value proportional to the number of revolutions thereof. A second detector means is located to sense the rotation of the feeding means and providing an output having a value proportional to the number of revolutions thereof. The first detecting means is connected to the input of a first counter between which is interposed gate means. A second detecting means is connected to the input of a second counter, the output of which is connected to the input of the gate and indicator means is provided to read out the value received by said first counter.
Inventors
- 👤 Pavel Seidl
- 👤 Milos Mladek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:45
CPC Classifications
D; D01; D01H; D01H13/00; D01H13/32; G; G01; G01B; G01B21/00; G01B21/02; G01B21/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
167 words
A system for measuring and indicating the draft of an open end spinning unit having rotary feed means for delivering fibrous material, a rotary twisting means for spinning the fibers into a yarn and a rotary withdrawing means for taking up the yarn, comprising a first detector means located at said withdrawing means for sensing the rotation thereof and providing an output having a value proportional to the number of revolutions thereof, a second detector means located at said feeding means for sensing the rotation thereof and providing an output having a value proportional to the number of revolutions thereof, a first counter, said first detecting means being connected to the input of said first counter, gate means interposed between said first detector and said first counter, a second counter, said second detecting means being connected to the input of said second counter, the output of said second counter being connected to the input of said gate, to read out the value received by said first counter.
Claim 2
Independent Claim
167 words
A system for measuring and indicating the draft of an open end spinning unit having rotary feed means for delivering fibrous material, a rotary twisting means for spinning the fibers into a yarn and a rotary withdrawing means for taking up the yarn, comprising a first detector means located at said withdrawing means for sensing the rotation thereof and providing an output having a value proportional to the number of revolutions thereof, a second detector means located at said feeding means for sensing the rotation thereof and providing an output having a value proportional to the number of revolutions thereof, a first counter, said first detecting means being connected to the input of said first counter, gate means interposed between said first detector and said first counter, a second counter, said second detecting means being connected to the input of said second counter, the output of said second counter being connected to the input of said gate, to read out the value received by said first counter.
Claim 3
Dependent Claim
20 words
The system according to claim 1 including a decade number switch interposed between the second counter and its associated detector.
Claim 4
Dependent Claim
11 words
The system according to claim 1 wherein said detectors are contactless.
Claim 5
Dependent Claim
31 words
The system according to claim 3 wherein said detectors are photoelectric devices and said rotary feed means and said rotary withdrawing means are provided with at least one optical marking indicia.
Claim 6
Dependent Claim
32 words
The system according to claim 1 including a rotatable wheel engaging the withdrawn yarn, said wheel being provided with at least one optical marking, and a photoelectric detector scanning said optical mark.
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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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |