US3640440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic circuit for controlling the feeding of yarn into a yarn magazine
Assignee: Elitex Zavody Textilniho
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Filing: 1970-04-17
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Granted: 1972-02-08
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Expires: 1990-04-17
Abstract
Abstract A pneumatic system for the control of the feeding of yarn into a magazine in textile machines, such as yarn-winding machines. The system functions exclusively by the use of pneumatic power; in one disclosed embodiment yarn fed from a source of supply by driven feed rollers passes under tension to a yarn magazine, and thence from the magazine to a yarn-winding device. Pneumatic sensors are provided for detecting (1) a failure of tension in the yarn between the feeding rollers and the magazine, and (2) the condition wherein the magazine is full of yarn. Pneumologic means, into which impulses from the two sensors are directed, controls a pneumatic power means for stopping the feeding of yarn by the feeding rollers upon the presence of either one or both conditions (1) and (2). In another disclosed embodiment, the pneumatic power means is under the control of only a pneumatic sensor which detects a failure of tension in the yarn between the feeding rollers and the magazine.
Inventors
- 👤 Jaroslav Sedlarik
- 👤 Jiri Havlas
- 👤 Premysl Kostelecky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:55
CPC Classifications
B; B65; B65H; B65H51/00; B65H51/20; B65H51/30; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
83 words
Apparatus for automatically controlling the feeding of yarn into a yarn magazine in a textile machine to permit the uninterrupted operation of the machine, comprising means for feeding the yarn into the magazine, a fluid pressure sensor for detecting changes in tension in the yarn between the feeding means and the magazine, and fluid pressure power means responsive to the sensor for interrupting the feeding of the yarn into the magazine when the yarn tension at the sensor falls below a predetermined value.
Claim 2
Dependent Claim
83 words
Apparatus for automatically controlling the feeding of yarn into a yarn magazine in a textile machine to permit the uninterrupted operation of the machine, comprising means for feeding the yarn into the magazine, a fluid pressure sensor for detecting changes in tension in the yarn between the feeding means and the magazine, and fluid pressure power means responsive to the sensor for interrupting the feeding of the yarn into the magazine when the yarn tension at the sensor falls below a predetermined value.
Claim 3
Dependent Claim
30 words
Apparatus according to claim 1, comprising a fluid pressure logic element interposed between the sensor and the power means, and a fluid pressure source connected to the fluid pressure element.
Claim 4
Dependent Claim
13 words
Apparatus according to claim 2, wherein the pressure fluid employed is a gas.
Claim 5
Dependent Claim
45 words
Apparatus according to claim 2, wherein the fluid pressure sensor includes a flap attached to a nozzle supplied with pressure fluid through a conduit connected to the fluid pressure source, and comprising means providing a venturi constriction in the conduit in advance of the nozzle.
Claim 6
Dependent Claim
52 words
Apparatus according to claim 1, comprising a second fluid pressure sensor for detecting the degree of filling of the magazine, and means connecting the second sensor to the fluid pressure power means, whereby the feeding of the yarn into the magazine is interrupted when the magazine contains a predetermined amount of yarn.
Claim 7
Dependent Claim
64 words
Apparatus according to claim 1, wherein the means for feeding yarn into the magazine comprises a means for pulling the yarn from a source of supply and a means for charging the thus fed yarn into the magazine, and wherein the means responsive to the sensor selectively interrupts the feeding of the yarn by the means which pulls it from the source of supply.
Claim 8
Dependent Claim
40 words
Apparatus according to claim 6, wherein the means for charging the yarn into the magazine is impositive in its action and remains operative to tension the yarn extending to it despite the interruption of the action of the yarn-pulling means.
Claim 9
Dependent Claim
37 words
Apparatus according to claim 6, wherein the yarn-pulling means comprises opposed driven yarn-pressing means, and the fluid pressure power means responsive to the sensor selectively interrupts the operative engagement of the yarn by said driven yarn-pressing means.
Claim 10
Dependent Claim
25 words
Apparatus according to claim 8, wherein the fluid pressure power means responsive to the sensor selectively removes the yarn from between the driven yarn-pressing means.
Claim 11
Dependent Claim
31 words
Apparatus according to claim 1, wherein the fluid pressure power means comprises at least one fluid impermeable hollow body of variable volume adapted to be selectively inflated with fluid under pressure.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |