Patent US3780513A successfully refreshed from Google Patents.
US3780513A
Expired / Lapsed
US
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Method and apparatus for driving open-end spinning frame
Assignee: Toyota Industries Corp
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Filing: 1971-04-05
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Granted: 1973-12-25
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Expires: 1991-04-05
Abstract
Abstract Method and apparatus for driving open-end spinning frame by a first electric source which actuates the spinning frame at a predetermined higher speed for carrying out the normal spinning operation and by a second electric source which actuates a spinning unit of yarn break at a predetermined lower speed during the yarn piecing operation. These electric sources are variable frequency electric sources for driving at least each individual variable speed motor which is directly connected to a spinning rotor of each spinning unit at predetermined variable speed.
Inventors
- 👤 K Watanabe
- 👤 Y Kito
- 👤 C Nozaki
- 👤 K Motobayashi
- 👤 K Kono
- 👤 K Tsuzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:17
CPC Classifications
D; D01; D01H; D01H4/00; D01H4/04; D01H4/08; D01H4/12; D01H4/14; D01H4/42; D01H4/44
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
113 words
A method of driving an open-end spinning frame utilizing a plurality of spinning units each having a spinning rotor provided with a centrifugal rotary spinning cavity into which opened fibers are continuously introduced to spin them into a yarn which is continuously delivered from the cavity, comprising driving each of said spinning rotors directly by means of a separate motor energized from variable frequency source means, driving said motor at a predetermined variable higher speed for carrying out the normal spinning operation and lowering the frequency of said source means to drive said motor at a predetermined variable lower speed for carrying out a yarn piecing operation when a spun yarn is broken.
Claim 2
Independent Claim
113 words
A method of driving an open-end spinning frame utilizing a plurality of spinning units each having a spinning rotor provided with a centrifugal rotary spinning cavity into which opened fibers are continuously introduced to spin them into a yarn which is continuously delivered from the cavity, comprising driving each of said spinning rotors directly by means of a separate motor energized from variable frequency source means, driving said motor at a predetermined variable higher speed for carrying out the normal spinning operation and lowering the frequency of said source means to drive said motor at a predetermined variable lower speed for carrying out a yarn piecing operation when a spun yarn is broken.
Claim 3
Independent Claim
215 words
A method of driving an open-end spinning frame utilizing a plurality of spinning units each having a spinning rotor provided with a centrifugal rotary spinning cavity into which opened fibers are continuously introduced to spin them into a yarn which is continuously delivered from the cavity, an opening roller for separating a bundle of fibers into individual fibers, a pair of feed rollers delivering a bundle of fibers to said opening roller and a pair of draw-off rollers delivering said yarn from said rotor and a take-up roller making a package of said yarn delivered from said draw-off rollers; comprising driving each spinning rotor directly by means of an individual motor, driving said motors of all spinning units at a predetermined variable high speed for carrying out normal spinning operations by connecting said motor with a first common variable frequency electric source, while driving the motor of a single spinning unit wherein yarn bReakage is detected at a predetermined variable low speed by connecting said motor to a second variable frequency electric source for carrying out a yarn piecing operation after disconnection with said first electric source, and after completion of said yarn piecing operation, driving said motor of said particular spinning unit at said high speed by connecting again with said first electric source.
Claim 4
Independent Claim
215 words
A method of driving an open-end spinning frame utilizing a plurality of spinning units each having a spinning rotor provided with a centrifugal rotary spinning cavity into which opened fibers are continuously introduced to spin them into a yarn which is continuously delivered from the cavity, an opening roller for separating a bundle of fibers into individual fibers, a pair of feed rollers delivering a bundle of fibers to said opening roller and a pair of draw-off rollers delivering said yarn from said rotor and a take-up roller making a package of said yarn delivered from said draw-off rollers; comprising driving each spinning rotor directly by means of an individual motor, driving said motors of all spinning units at a predetermined variable high speed for carrying out normal spinning operations by connecting said motor with a first common variable frequency electric source, while driving the motor of a single spinning unit wherein yarn bReakage is detected at a predetermined variable low speed by connecting said motor to a second variable frequency electric source for carrying out a yarn piecing operation after disconnection with said first electric source, and after completion of said yarn piecing operation, driving said motor of said particular spinning unit at said high speed by connecting again with said first electric source.
Claim 5
Dependent Claim
71 words
A method of driving an open end spinning frame utilizing a plurality of spinning units, according to claim 2, wherein aid second electric source comprises a plurality of second variable frequency electric sources so that driving said motor of a single spinning unit wherein yarn breakage is detected is carried out by connecting said motor of a single spinning unit to one of said plurality of second variable frequency electric sources.
Claim 6
Dependent Claim
49 words
Driving method of an open-end spinning frame according to claim 2, wherein said low speed driving of said motor for driving said rotor of a next spinning unit, which is required to carry out said yarn piecing operation, must wait until a previous yarn piecing operation has been completed.
Claim 7
Dependent Claim
46 words
Driving method of an open-end spinning frame according to claim 2, wherein said high speed driving of all motors for driving respective rotors is commenced at a predetermined low speed and is gradually accelerated up to a predetermined high speed for carrying out normal spinning operations.
Claim 8
Dependent Claim
86 words
Driving method of an open-end spinning frame according to claim 2, wherein said low speed driving of said motor of a spinning unit wherein a yarn piecing operation is required is commenced at a predetermined low speed, and after completion of said yarn piecing operation, driving speed is gradually accelerated up to a predetermined high speed for carrying out normal spinning operations, thereafter driving connection of said motor with said second variable frequency electric source is changed to connection with said first variable frequency electric source.
Claim 9
Dependent Claim
50 words
Driving method of an open-end spinning frame according to claim 6, wherein variable speed driving of said motor by said second variable frequency electric source is carried out together with variable speed driving of said feed rollers, draw off rollers and take-up roller while maintaining constant relative speed ratios therebetween.
Claim 10
Independent Claim
215 words
An apparatus for driving an open-end spinning frame utilizing a plurality of spinning units each having a spinning rotor provided with a centrifugal rotary spinning cavity into which opened fibers are continuously introduced to spin them into a yarn which is continuously removed from said cavity, a pair of feed rollers supplying a bundle of fibers to said spinning rotor by way of an opening roller and a pair of draw-off rollers delivering said yarn from said rotor, a take-up roller for producing a package from said yarn delivered from said draw-off rollers, comprising, an individual motor for directly driving said spinning rotor of each spinning unit, means for driving said motor, said driving means comprising a first variable frequency electric source connected to drive all of said motors at a predetermined high speed for carrying out the normal spinning operation, a second variable frequency electric source for driving said motor of a spinning unit which is required to carry out a yarn piecing operation, means for connecting said motor of a spinning unit with a yarn breakage to said second variable frequency electric source instead of said first electric source and for subsequently connecting said motor to said first electric source instead of said second electric source after completion of said yarn piecing operation.
Claim 11
Independent Claim
215 words
An apparatus for driving an open-end spinning frame utilizing a plurality of spinning units each having a spinning rotor provided with a centrifugal rotary spinning cavity into which opened fibers are continuously introduced to spin them into a yarn which is continuously removed from said cavity, a pair of feed rollers supplying a bundle of fibers to said spinning rotor by way of an opening roller and a pair of draw-off rollers delivering said yarn from said rotor, a take-up roller for producing a package from said yarn delivered from said draw-off rollers, comprising, an individual motor for directly driving said spinning rotor of each spinning unit, means for driving said motor, said driving means comprising a first variable frequency electric source connected to drive all of said motors at a predetermined high speed for carrying out the normal spinning operation, a second variable frequency electric source for driving said motor of a spinning unit which is required to carry out a yarn piecing operation, means for connecting said motor of a spinning unit with a yarn breakage to said second variable frequency electric source instead of said first electric source and for subsequently connecting said motor to said first electric source instead of said second electric source after completion of said yarn piecing operation.
Claim 12
Dependent Claim
30 words
Driving apparatus of an open-end spinning frame according to claim 8, wherein said first and second variable frequncy electric sources are generators which are driven by respective variable speed motors.
Claim 13
Dependent Claim
26 words
Driving apparatus of an open-end spinning frame according to claim 8, wherein said first and second variable frequency electric sources are Static variable frequency electric sources.
Claim 14
Dependent Claim
27 words
Driving apparatus of an open-end spinning frame according to claim 10, wherein said static variable frequency electric sources comprise a plurality of semi-conductor elements such as thyristors.
Claim 15
Dependent Claim
64 words
Driving apparatus of an open-end spinning frame according to claim 8, wherein said connecting means is provided with a control member for waiting for said connection of said motor for driving said rotor of a next spinning unit which is required to carry out said yarn piecing operation to said second variable frequency electric source until a previous yarn piecing operation has been completed.
Claim 16
Dependent Claim
107 words
Driving apparatus of an open-end spinning frame according to claim 8, further comprising a mechanical driving means provided with a plurality of shafts extending from said driving means through all spinning units, a first set of clutches for engaging or disengaging said feed rollers, draw-off rollers and take-up rollers of all spinning units to respective shafts driven by said first variable frequency electric source, a second set of clutches for engaging or disengaging said feed rollers, draw-off rollers and take-up rollers of each spinning unit to respective shafts driven by said second variable frequency source only when said yarn piecing operation is required to be carried out.
Claim 17
Dependent Claim
86 words
Driving apparatus of an open-end spinning frame according to claim 8, wherein said second variable frequency electric source consists of a plurality of units of electric sources for driving said rotor, feed rollers, draw-off rollers and take-up roller of said spinning unit, which is required to carry out said yarn piecing operation, and said spinning units are grouped into several groups, each of said plurality of electric sources is utilized for operating said yarn piecing operation of a spinning unit which belongs to a corresponding group.
Claim 18
Dependent Claim
45 words
Driving apparatus of an open-end spinning frame according to claim 14 further comprising means for selectively connecting said spinning unit which is required to carry out said yarn piecing operation to one of said units of electric sources forming said second variable frequency electric source.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |