GB1577472A - Method and apparatus for forming yarns - Google Patents
Method and apparatus for forming yarns Download PDFInfo
- Publication number
- GB1577472A GB1577472A GB3034677A GB3034677A GB1577472A GB 1577472 A GB1577472 A GB 1577472A GB 3034677 A GB3034677 A GB 3034677A GB 3034677 A GB3034677 A GB 3034677A GB 1577472 A GB1577472 A GB 1577472A
- Authority
- GB
- United Kingdom
- Prior art keywords
- yarn
- tensometer
- machine
- thread
- pressing rollers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
- D01H13/16—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Description
(54) METHOD AND APPARATUS FOR FORMING YARNS
(71) We, INSTITUTE PO OBLEKLO
I TEXTIL, 48 Voyvodina Mogila Street,
Sofia, BULGARIA, a Research Institute organized under the Laws of Bulgeria, do hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:
This invention relates to a method of, and an apparatus for, stopping a rotating hollow spindle twisting machine in response to breakage of at least one of the component threads of the fancy yarn being produced.
A method for stopping such a machine is known, according to which method each of the component threads is controlled individually. For this purpose, provided in the path of each thread is a protective device which reacts, for example, to a reduction in the tension of the thread, to a lack of supply of the thread, or to parting of the thread.
However, with this method it is difficult to follow directly the path of the tie thread which unwinds freely from the hollow spindle. This requires the use of complex equipment which, even so, does not guarantee good results.
The present invention therefore aims to provide a method of, and a apparatus for, stopping the machine in the event of the base thread or the tie thread parting.
According to one aspect of the present invention there is provided a method of stopping a rotating hollow spindle twisting machine in response to breakage of at least one of the component threads of the fancy yarn being produced, wherein the loops of the yarn are restrained by means of a hook in the case of parting of at least one of the component threads so as to reduce the tension in the yarn and to actuate a tensometer which senses the tension in the produced yarn, the tensometer, in turn, stopping the machine.
According to a second aspect of the present invention there is provided an apparatus for effecting the method of the present invention, which apparatus comprises a contact tensometer having a sensing arm which in use is in contact with the yarn in a region between a pair of pressing rollers and a yarn guide and a hook, for restraining the loops of the yarn when at least one of the component threads parts, located immediately upstream of the yarn guide.
The tensometer may be in the form of a strain gauge.
For a better understanding of the present invention and to show more clearly how it may be carried into effect, reference will now be made, by way of example, to the accompanying drawing which shows one embodiment of an apparatus for effecting the method of the present invention.
The apparatus comprises a thread guide 3 to which are supplied a base thread 2 and an effect thread 1. After passing through the thread guide 3, the two threads pass between a first pair of pressing rollers 4.
Located between the first pressing rollers 4 and a second pair of pressing rollers 7 is a hollow spindle 5 having wound thereon a tie thread 6. Between the two pairs of pressing rollers, the threads 1 and 2 are twisted together and, at the same time, the tie thread 6 is twisted into the threads 1 and 2 to form the desired fancy yarn. After passing between the second pressing rollers 7, the yarn passes through a yarn guide 10 to a roller 13.
Disposed about 0.5 mm upstream (with regard to the yarn) of the yarn guide 10 is a small hook 9 and disposed between the yarn guide 10 and the second pressing rollers is a contact tensometer 12 having a sensing arm 11. The contact tensometer may be, for example, in the form of a strain gauge.
In operation of the apparatus, should the tie thread 6 part, the loops formed around
the base thread 2 by the effect thread 1 will - increase in size. Some of these loops will be
caught by the small hook 9 and this will
interrupt the winding of the finished yarn
over the roller 13. However, the second
pressing rollers 7 will continue to feed the
base thread 2 and effect thread 1 and this
will cause a reduction in the tension in the
yarn between the yarn guide 10 and the
second pressing rollers 7 and the sensing
arm 11 will be deflected and will operate the
tensometer 12 to stop one or more working
positions of the machine of which the device
forms a part.
If the base thread 2 should part, the
tension of the yarn between the yarn guide
10 and the second pressing rollers 7 will
again be reduced and the one or more
working positions of the machine will again
be stopped.
WHAT WE CLAIM IS:
1. A method of stopping a rotating
hollow spindle twisting.machine in response
to breakage of at least one of the component
threads of the fancy yarn being produced,
wherein the loops of the yarn are restrained
by means of a hook in the case of parting of
at least one of the component threads so as
to reduce the tension in the yarn and to
actuate a tensometer which senses the ten
sion in the produced yarn, the tensometer,
in turn, stopping the machine.
2. A method according to claim 1 and
substantially as hereinbefore described with
reference to the accompanying drawing.
3. An apparatus for effecting the
method according to claim 1 or 2, which
apparatus comprises a contact tensometer
having a sensing arm which in use is in
contact with the yarn in a region between a
pair of pressing rollers and a yarn guide, and
a hook, for restraining the loops of the yarn
when at least one of the component threads
parts, located immediately upstream of the
yarn guide.
4. An apparatus as claimed in claim 3,
wherein the tensometer comprises a strain
gauge.
5. An apparatus for stopping a rotating
hollow spindle twisting machine substantial
ly as hereinbefore described with reference
to, and as shown in, the accompanying
drawing.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (5)
- **WARNING** start of CLMS field may overlap end of DESC **.the base thread 2 by the effect thread 1 will - increase in size. Some of these loops will be caught by the small hook 9 and this will interrupt the winding of the finished yarn over the roller 13. However, the second pressing rollers 7 will continue to feed the base thread 2 and effect thread 1 and this will cause a reduction in the tension in the yarn between the yarn guide 10 and the second pressing rollers 7 and the sensing arm 11 will be deflected and will operate the tensometer 12 to stop one or more working positions of the machine of which the device forms a part.If the base thread 2 should part, the tension of the yarn between the yarn guide10 and the second pressing rollers 7 will again be reduced and the one or more working positions of the machine will again be stopped.WHAT WE CLAIM IS: 1. A method of stopping a rotating hollow spindle twisting.machine in response to breakage of at least one of the component threads of the fancy yarn being produced, wherein the loops of the yarn are restrained by means of a hook in the case of parting of at least one of the component threads so as to reduce the tension in the yarn and to actuate a tensometer which senses the ten sion in the produced yarn, the tensometer, in turn, stopping the machine.
- 2. A method according to claim 1 and substantially as hereinbefore described with reference to the accompanying drawing.
- 3. An apparatus for effecting the method according to claim 1 or 2, which apparatus comprises a contact tensometer having a sensing arm which in use is in contact with the yarn in a region between a pair of pressing rollers and a yarn guide, and a hook, for restraining the loops of the yarn when at least one of the component threads parts, located immediately upstream of the yarn guide.
- 4. An apparatus as claimed in claim 3, wherein the tensometer comprises a strain gauge.
- 5. An apparatus for stopping a rotating hollow spindle twisting machine substantial ly as hereinbefore described with reference to, and as shown in, the accompanying drawing.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3034677A GB1577472A (en) | 1977-07-19 | 1977-07-19 | Method and apparatus for forming yarns |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3034677A GB1577472A (en) | 1977-07-19 | 1977-07-19 | Method and apparatus for forming yarns |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1577472A true GB1577472A (en) | 1980-10-22 |
Family
ID=10306194
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3034677A Expired GB1577472A (en) | 1977-07-19 | 1977-07-19 | Method and apparatus for forming yarns |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1577472A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2487387A1 (en) * | 1980-07-26 | 1982-01-29 | Zinser Textilmaschinen Gmbh | WORKING MACHINE, IN PARTICULAR RING MACHINE |
-
1977
- 1977-07-19 GB GB3034677A patent/GB1577472A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2487387A1 (en) * | 1980-07-26 | 1982-01-29 | Zinser Textilmaschinen Gmbh | WORKING MACHINE, IN PARTICULAR RING MACHINE |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |