Patent US3791128A successfully refreshed from Google Patents.
US3791128A
Expired / Lapsed
US
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Method and apparatus for stopping and starting one or more open-end-spinning devices
Assignee: Rieter Ingolstadt GmbH
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Filing: 1971-11-18
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Granted: 1974-02-12
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Expires: 1991-11-18
Abstract
Abstract Yarn breakages or irregularities are avoided by connecting spinning apparatus, fiber sliver supply devices, and yarn drawoff devices by suitable mechanical connections to a common variable speed motor to maintain a constant speed ratio between such components of spinning apparatus. A plurality of spinning apparatuses may have individual drive motors connected electrically to the common motor. Interposed between the main operating switch and the drive motor are a pair of intermediate circuits, one circuit having a potentiometer control to limit the motor to a low variable speed range, and the second circuit having relatively high speed range including normal production speed. Selector switches cooperate to connect the drive motor to one or the other of the intermediate circuits, but one or more of such selector switches may be operable manually or by cam control drums to effect switching from one intermediate circuit to another to effect low speed operation for an indefinite or a predetermined time to facilitate bobbin-changing or return of an escaped yarn end, for example.
Inventors
- 👤 H Landwehrkamp
- 👤 H Niestroj
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:45
CPC Classifications
D; D01; D01H; D01H4/00; D01H4/48
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
108 words
A method for stopping an open-end-spinning device including spinning chamber means, sliver feed means and yarn drawoff means, all of said means being driven at constant speed ratios in relation to each other, comprising the steps of decelerating the spinning device from the full spinning speed to a selected low speed while maintaining said constant ratio, stopping the spinning device only after such selected low spinning speed has been reached, and subsequently starting the open-end-spinning device by accelerating the spinning speed up to a selected low speed, feeding a yarn end back into the spinning device and only thereafter accelerating the spinning speed up to full spinning speed.
Claim 2
Independent Claim
108 words
A method for stopping an open-end-spinning device including spinning chamber means, sliver feed means and yarn drawoff means, all of said means being driven at constant speed ratios in relation to each other, comprising the steps of decelerating the spinning device from the full spinning speed to a selected low speed while maintaining said constant ratio, stopping the spinning device only after such selected low spinning speed has been reached, and subsequently starting the open-end-spinning device by accelerating the spinning speed up to a selected low speed, feeding a yarn end back into the spinning device and only thereafter accelerating the spinning speed up to full spinning speed.
Claim 3
Independent Claim
78 words
A method of exchanging yarn-receiving bobbins in an open-end-spinning device including yarn-receiving bobbins, spinning chamber means, sliver feed means and yarn drawoff means, all of said means being driven at constant speed ratios in relation to each other, comprising the steps of reducing the spinning speed to a selected low speed while maintaining said constant ratio, manually exchanging a yarn-receiving bobbin, and again accelerating the spinning speed up to full speed after the yarn-receiving bobbin has been exchanged.
Claim 4
Independent Claim
78 words
A method of exchanging yarn-receiving bobbins in an open-end-spinning device including yarn-receiving bobbins, spinning chamber means, sliver feed means and yarn drawoff means, all of said means being driven at constant speed ratios in relation to each other, comprising the steps of reducing the spinning speed to a selected low speed while maintaining said constant ratio, manually exchanging a yarn-receiving bobbin, and again accelerating the spinning speed up to full speed after the yarn-receiving bobbin has been exchanged.
Claim 5
Independent Claim
74 words
A method of repairing yarn breakages in an open-end-spinning device including spinning chamber means, sliver feed means and yarn drawoff means, all of said means being driven at constant speed ratios in relation to each other, comprising the steps of reducing the spinning speed to a selected low speed while maintaining said constant ratio, repairing a yarn breakage, and again accelerating the spinning speed to full speed after said repairing operation has been effected.
Claim 6
Independent Claim
74 words
A method of repairing yarn breakages in an open-end-spinning device including spinning chamber means, sliver feed means and yarn drawoff means, all of said means being driven at constant speed ratios in relation to each other, comprising the steps of reducing the spinning speed to a selected low speed while maintaining said constant ratio, repairing a yarn breakage, and again accelerating the spinning speed to full speed after said repairing operation has been effected.
Claim 7
Independent Claim
99 words
A method for effecting servicing operations in an open-end-spinning device having two limit speeds, one being rest speed and the other being full speed, said open-end-spinning device including chamber means, sliver feed means and yarn drawoff means, all of said means being driven at constant speed ratios in relation to each other even during changing from one limit speed to the other, comprising the steps of changing from one limit speed to an intermediate, relatively low, speed, holding such intermediate speed constant, effecting a servicing operation, and subsequently changing from said intermediate speed to one of the limit speeds.
Claim 8
Independent Claim
99 words
A method for effecting servicing operations in an open-end-spinning device having two limit speeds, one being rest speed and the other being full speed, said open-end-spinning device including chamber means, sliver feed means and yarn drawoff means, all of said means being driven at constant speed ratios in relation to each other even during changing from one limit speed to the other, comprising the steps of changing from one limit speed to an intermediate, relatively low, speed, holding such intermediate speed constant, effecting a servicing operation, and subsequently changing from said intermediate speed to one of the limit speeds.
Claim 9
Dependent Claim
147 words
Speed control apparatus for an open-end-spinning device having spinning means, a fiber supply device and a yarn drawoff device comprising drive means for driving the fiber supply device and the yarn drawoff device, main switch means for supplying power to said drive means, two potentiometer means connected in parallel between said drive means and said main switch means, and selector switch means operable to selectively connect drive means and one of said potentiometer means, said selector switch means including a plurality of selector switches, each operable between a position for forming a series connection between one potentiometer means and the drive means and a bypass position for connecting the drive means and the other potentiometer means, and timing means engageable with one of said selector switches to control its position and the length of time that such one selector switch is held in one of its positions.
Claim 10
Dependent Claim
147 words
Speed control apparatus for an open-end-spinning device having spinning means, a fiber supply device and a yarn drawoff device comprising drive means for driving the fiber supply device and the yarn drawoff device, main switch means for supplying power to said drive means, two potentiometer means connected in parallel between said drive means and said main switch means, and selector switch means operable to selectively connect drive means and one of said potentiometer means, said selector switch means including a plurality of selector switches, each operable between a position for forming a series connection between one potentiometer means and the drive means and a bypass position for connecting the drive means and the other potentiometer means, and timing means engageable with one of said selector switches to control its position and the length of time that such one selector switch is held in one of its positions.
Claim 11
Dependent Claim
17 words
The speed control apparatus defined in claim 5, in which the timing means includes a control drum.
Claim 12
Dependent Claim
27 words
The speed control apparatus defined in claim 6, further including auxiliary drive means, and coupling means for selectively coupling said auxiliary drive means and the control drum.
Claim 13
Dependent Claim
35 words
The speed control apparatus defined in claim 5, in which the timing means includes a first control drum to control increases in spinning speed, and a second control dRum to control decreases in spinning speed.
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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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |