US3828540A - Individual bobbin spindle stop motion for a twister - Google Patents
Individual bobbin spindle stop motion for a twister Download PDFInfo
- Publication number
- US3828540A US3828540A US00324215A US32421573A US3828540A US 3828540 A US3828540 A US 3828540A US 00324215 A US00324215 A US 00324215A US 32421573 A US32421573 A US 32421573A US 3828540 A US3828540 A US 3828540A
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- United States
- Prior art keywords
- bobbin
- lever
- yarn
- latch
- indication
- 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 - Lifetime
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- 241001589086 Bellapiscis medius Species 0.000 title claims abstract description 13
- 230000004913 activation Effects 0.000 claims abstract description 5
- 239000003990 capacitor Substances 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 8
- 230000004044 response Effects 0.000 claims description 5
- 230000003213 activating effect Effects 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 abstract description 12
- 238000000034 method Methods 0.000 description 9
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 238000009987 spinning Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
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
- D01H13/1608—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 where the paying-out and take-up stations are stopped at one and the same time
Definitions
- the system may be reset after acti- U D S TE ATENTS vation but will again activate if the missing yarn has 2,565,500 8/1951 lngham 57/81 x not been replaced- 2,704,430 3/1955 Harris 57/81 2,984,964 5/1961 Bates 57/81 x 16 Clam, 5 Drawmg Figures /7 e fl 20 ii I I T T
- Two or more ends of yarn may be twisted together on which is engaged with the spindle twirl so that it will rotate with the spindle. If any one of the fyarns fed to the spindle to' form the twisted yarn breaks, then the twisted yarn will become second quality, which results in waste and will drastically reduce its sale value.
- the yarn breakage is detected by a mechanical or photo-electric type switch which may be used to activate a control system for stopping thetake up.
- the switch in one method activates a cutter which will sever all remaining yarns fed to the spindle should one yarn break.
- a major disadvantage of this method is the fact that the cut ends of yarn continue to whirl around with the bobbin, and after a period of time, the ends tend to become entangled .with adjacent bobbins causing further problems.
- the yarn detecting switches activate a mechanism which stops the yarn fed to a spindle and simultaneously stops the spindle rotation which, of course, stops the bobbin from further winding yarn around it.
- the yarn feed is stopped by separating the feed rolls from the yarn.
- the spindle rotation may be stopped by means of a clutch mechanism which indirectly drives the spindle from the belt'drive.
- apparatus for stopping take up and feed functions in a yarn twister wherein a plurality of drivetwirls and bobbins driven thereby, each take up a plurality of yarn strands from a supply as each bobbin rotates.
- Drive means including a drive and pressure roller set for each selected number of yarn strands draws the yarn at a selected rate for its associated bobbin, while a yarn ring following the bobbin guides the number of yarn strands for twisting as the bobbin rotates.
- the system comprises means for each yarn strand for detecting termination of yarn supply of any one ofsaid yarn strands and producing an output indication thereof while means operatively coupled with each bobbin responds to the output for disengaging the bobbin out of driving relationship withthe twirl.
- FIG. 1 is an isometric view of the twister incorporating the apparatus of the present invention
- FIG. 2 is a side elevation of the apparatus of the present invention in a reset or cocked condition
- FIG. 3 is a view of FIG. 2 in the released position
- FIG. 4 is an isometric view of a detail of the present invention.
- FIG. 5,. is a schematic diagram of the control circuit.
- This invention relates particularly to apparatus for converting twisters that have direct drive spindles into an individual spindle stop motion machine.
- the method utilized is firstly, to detect yarn breakage through either a mechanical or electronic means, and
- This invention is intended to be used on twisters or spinning frames that utilize a twirl, mentioned above, or equivalent, to engage the bobbin to the spindle as explained further below.
- Yarn spools 9 provide a supply of yarns 10 which are fed through guides 11, then between respective upper and lower feed rollers 12 and 13.
- the strands 10 are grouped or plied intoa yarn 14 and fed through a loop 21a in a free spinning follower 21b riding in a reciprocating frame 23.
- the frame 23 reciprocates between the end points 15A and 15B of bobbin 15.
- the amount of twist in the yarn 14 is governed by the lag between the RPM of the spinning bobbinlS and the RPM of the follower 21b, control of which is wellknown in the art.
- Bobbin 15 is fitted over a spindle shaft 17 by means of a hole 18 through the center of the bobbin 15 and sets down upon and engages with spindle twirl 16by a mating slot cut 19 in the bobbin engaging with bar 20.
- the twisted yarn 14 is collected into a package on bobbin 15 under control of the reciprocating traveler 23 as previously mentioned.
- the method of halting yarn collection on bobbin 15 should any one of yarns break consists of raising weighted free rolling upper feed rollers 12 up off driven feed rollers 13 and simultaneously pushing bobbin up off spindle twirl 16 and applying a brake pad 22 to it, such that it stops rotation.
- the bobbin at rest is supported by spindle shaft 17 which continues to rotate. Details of how this is accomplished follows:
- Yarn detection switches 23 monitor each end of yarns 10 such that if any end breaks or runs out, a signal is sent to any electronic circuit 24 through wires 25. This signal causes momentary actuation of a solenoid 26 which activates latch 28 immediately after activation of circuit 24.
- Electronic circuit 24, shown in detail in FIG. 5, is discussed below. The electronic circuit 24 operates solenoid 26 and presses latch 28 laterally, as viewed in FIG. 3 which allows a spring 29 to contract and pull a lever 30 downward.
- FIGS. 2 and 3 are side views of the apparatus of the invention of FIG. 1, except that FIG. 1 is shown in isometric form. Further FIG. 2 is shown reset or cocked while FIG. 3 in the tripped or stop bobbin position.
- latch 28 is normally vertical in the reset position.
- Latch 28 has a ledge or retaining portion 31 which holds lever 30 in the cooked position.
- plunger 32'disposed therein moves laterally (in FIG. 3 to the right) for pushing latch 28 away to the extent that its retaining ledge 31 releases arm or lever 30.
- Latch member 28 is a member sufficiently flexible to bend under theinfluence of plunger 32.
- FIG. 4 it can be seen that latch 28 is secured to frame member 57 by appropriate fasteners 58.
- FIG. 5 shows details of the electronic circuit 24, the function of which is to cause solenoid 26 to trip the latch 28 momentarily. If a strand of yarn breaks or runs out, a corresponding one of the sensitive yarn switches 23, represented by dotted box SW,, is closed. If the missing yarn has not been replaced and lever 30 has been placed in the reset position, circuit 24 will thereupon go through a time delay and again activate 26 momentarily causing the apparatus to assume the tripped position as in FIG. 3.
- switches 23 of switch unit SW can be a flexible member or arm 23A coupled to a contactor which is open under one condition, i.e., when under tension from an unbroken thread 10 held taut between spool 9 and guide 11, and is closed when a thread breaks releasing arm 23A.
- semiconductor selectors having a photocell disposed in one side of a body and light source in the other.
- the light impinging in the detector fluctuates generating a signal which may be utilized to indicate an unbroken strand.
- a signal which may be utilized to indicate an unbroken strand.
- the DC potential provides sufficient base drive to a transistor 44 to cause it to be saturated. This places a low-or ground on the collector of transistor 45 and also the gate G input of a triac 46 holding same of or non-conductive. Solenoid 26 is in series with triac 46 and, therefore, it also is off or inactivated.
- FIG. 4 shows a detail of the system as previously described whereinmicro switch 48 is mounted on frame member 55 and trip lever 56 of switch 48 engages with lever 30 when in the cocked position. Further, switch 48 closes its contacts when lever 30 releases trip lever 56. Closure of switch 48 (see FIG. 5) establishes a path of current through diode 41 to the base of transistor 45 1 through resistor 50 for holding same on” and thereby grounding the gate G of triac 46 for resetting solenoid 26 as previously mentioned.
- solenoid 24 a momentary action of solenoid 24 occurs each time SW, goes from an open positionto a closed position and lever 30 is released thereby closing switch 48 and deactivating solenoid 26.
- capacitor 52 is charged to a bias level which saturates transistor 45.
- switch 48 is opened, i.e., lever 30 reset, the charge in capacitor 52 does not immediately drain off, but the amount of time this bias is applied to transistor 45 is determined by the RC time constant of capacitor 52 and base resistor 50.
- transistor 45 will be saturated thereby holding triac 46 off for a selected period immediately after switch 48 is opened, regardless of the condition of switch SW If SW remains closed, implying a missing strand 10, the charge on capacitor 52 will eventually drain off through resistor 50. However, while transistor 45 is on, i. e;, saturated due to the condition of capacitor 52, the gate G of triac 46 will be held at ground or low and the triac 46 will thereby be a non-conductive. Once the transistor 45 becomes nonconductive, i.e., after the capacitor 52 has discharged transistor 45 relinquishes control to transistor 44.
- Lever 58 has brake pads (not shown) located on it just under the bottom of twirl 16. As force is applied to lever 58 it causes the brake pads to friction stop twirl 16 causing drive belt 56 to slip. Note that lever 58 has lever 59 attached to it such that if a force is exerted on lever 58, it moves inward and lever 59 moves upward as shown by the arrow. The inward force also causes lever 59 to move upward to push pick up arm 60 which is attached to lever 30. As lever 30 is pushed up the spring 29 is stretched and the bobbin is lowered down on the twirl (now stopped by the action of the brake pads against the under side of twirl 19) and the rollers 12 are lowered.
- lever 59 lifts lever 30 up past notch 31 of lever 28 and lever 28 springs inward toward lever 30 (left) such that when force is removed from lever 58, lever 30 will remain engaged with the notch in lever 28 holding the mechanism in the cocked position.
- lever 58 As the pressure on lever 58 is released the brake pad is removed from twirl l6 and the belt once again turns the twirl which turns the bobbin 15. It is necessary to momentarily stop the twirl 16 so that the bobbin 15 may be replaced. It is generally understood with this type of machine that they have arm operating speeds in the order of 5,000 PRM and would not operate properly if the twirls were not momentarily stopped for replacing the bobbins 15.
- each of a plurality of spindle twirls and bobbins having a drive therefor take up a selected number of yarn strands from a yarn supply as each of said bobbins rotate
- drive means including a drive and pressure roller set for each selected number of yarn strands, for drawing said yarn strands at a selected rate of the associated bobbin, and a reciprocating yarn ring following the bobbin, guiding the number of yarn strands for twisting and take up as the bobbin rotates, comprising: means for each yarn strand for detecting the termination of the yarn supply of any one of said yarn strands and producing an indication thereof, and means operatively associated with each bobbin, re-
- Apparatus as described in claim 1 including: means coupled to said indication responsive means for separating said pressure roller from said drive roller for stopping feed of said yarn strands, whereby the simultaneous stopping of take up motion of said individual bobbin and feed action of said drive means is accomplished.
- said means responsive to the indication means comprises: control means including a latch member having a recess for engaging and holding said means in one condition and for releasing said means in response to said detector means output.
- control means includes a solenoid and actuating circuit therefor for momentarily actuating said latch means thereby releasing same.
- control means comprises:
- said electronic circuit means includes:
- a lever associated with each of said bobbins and pressure roller sets operatively engaged with said latch for releasing same such that both said bobbin and pressure rollers are respectively moved out of operative relationship with said twirl and drive rollers when said latch is actuated and the lever associated with the bobbin includes a brake pad engaging with the bobbin for stopping same when activated.
- said detector means includes time delay means for retaining said means, for a selected interval, after said second lever is activated, said interval governed by a resistor, capacitor delay circuit and responsive to said detector means for providing a trigger signal if any one of said strands is terminated.
- said detector means further includes switch means operatively coupled with said means for producing signals indicative of reset and release conditions, for producing an enabling signal for said control means to release said latch after said lever is reset from its released position unless a terminated strand associated therewith is replaced.
- said detector means comprises:
- photodetector means responsive to each strand of yarn and each coupled to said control means for producing a signal indicative of yarn termination.
- said detector means comprises:
- each strand responsively coupled thereto having at least two states, a first state for providing indication of a continuous strand and a second state indicative of the termination of said strand.
- reset means for momentarily stopping said twirl from rotation while said bobbin is replaced thereon and said means engages with said control means for resetting said detector means.
- said latch includes a bar fixed at one end and engaging with the solenoid at the other end thereof having a ledge member for holding said lever in reset position and releasing same when urged laterally by the activation of said plunger, said latch being relatively flexible and tending to flex back to the unreleased condition when the lever is reset.
- said means responsive to the indication means for disengaging the bobbin out of driving relation with the bobbin drive includes: a lever, for disengaging said bobbin out of driving relation with the spindle twirl and stopping rotation thereof.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
Description
Claims (16)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00324215A US3828540A (en) | 1973-01-16 | 1973-01-16 | Individual bobbin spindle stop motion for a twister |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00324215A US3828540A (en) | 1973-01-16 | 1973-01-16 | Individual bobbin spindle stop motion for a twister |
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US3828540A true US3828540A (en) | 1974-08-13 |
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US00324215A Expired - Lifetime US3828540A (en) | 1973-01-16 | 1973-01-16 | Individual bobbin spindle stop motion for a twister |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4452168A (en) * | 1981-06-29 | 1984-06-05 | At&T Technologies, Inc. | Apparatus for detecting breaks in strand material |
CN102995202A (en) * | 2012-11-21 | 2013-03-27 | 吴江杰杰织造有限公司 | Control system for doubling and twisting machine |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2565500A (en) * | 1947-08-06 | 1951-08-28 | Deering Milliken Res Trust | Control of filamentary material |
US2704430A (en) * | 1950-11-22 | 1955-03-22 | Pneumafil Corp | Control for the operation of roving frames |
US2984964A (en) * | 1957-09-02 | 1961-05-23 | Prince Smith & Stells Ltd | Yarn supply means in textile twisting machines |
US3166883A (en) * | 1962-11-19 | 1965-01-26 | Meadows Mfg Company | Spindle control mechanism |
US3388544A (en) * | 1966-04-06 | 1968-06-18 | Hamel Ag | Multiple-thread monitor for bobbinbuilding mechanism and the like |
US3498039A (en) * | 1968-07-29 | 1970-03-03 | Leesona Corp | Control system |
US3523415A (en) * | 1968-09-26 | 1970-08-11 | Parks Cramer Co | Apparatus for reporting ends down on textile yarn forming machines |
-
1973
- 1973-01-16 US US00324215A patent/US3828540A/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2565500A (en) * | 1947-08-06 | 1951-08-28 | Deering Milliken Res Trust | Control of filamentary material |
US2704430A (en) * | 1950-11-22 | 1955-03-22 | Pneumafil Corp | Control for the operation of roving frames |
US2984964A (en) * | 1957-09-02 | 1961-05-23 | Prince Smith & Stells Ltd | Yarn supply means in textile twisting machines |
US3166883A (en) * | 1962-11-19 | 1965-01-26 | Meadows Mfg Company | Spindle control mechanism |
US3388544A (en) * | 1966-04-06 | 1968-06-18 | Hamel Ag | Multiple-thread monitor for bobbinbuilding mechanism and the like |
US3498039A (en) * | 1968-07-29 | 1970-03-03 | Leesona Corp | Control system |
US3523415A (en) * | 1968-09-26 | 1970-08-11 | Parks Cramer Co | Apparatus for reporting ends down on textile yarn forming machines |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4452168A (en) * | 1981-06-29 | 1984-06-05 | At&T Technologies, Inc. | Apparatus for detecting breaks in strand material |
CN102995202A (en) * | 2012-11-21 | 2013-03-27 | 吴江杰杰织造有限公司 | Control system for doubling and twisting machine |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: BURLINGTON INDUSTRIES, INC. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:BURLINGTON INDUSTRIES, INC.;REEL/FRAME:004821/0756 Effective date: 19870903 Owner name: BURLINGTON INDUSTRIES, INC. Free format text: MERGER;ASSIGNOR:BI/MS HOLDS I INC.;REEL/FRAME:004827/0512 Effective date: 19870903 Owner name: BURLINGTON INDUSTRIES, INC.,STATELESS Free format text: MERGER;ASSIGNOR:BI/MS HOLDS I INC.;REEL/FRAME:004827/0512 Effective date: 19870903 |
|
AS | Assignment |
Owner name: CIT GROUP/COMMERCIAL SERVICES, INC., AS AGENT, THE Free format text: SECURITY INTEREST;ASSIGNOR:WLR BURLINGTON FINANCE ACQUISITION LLC;REEL/FRAME:014754/0672 Effective date: 20031110 |