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Publication numberUS3748648 A
Publication typeGrant
Publication dateJul 24, 1973
Filing dateJul 1, 1971
Priority dateJul 1, 1971
Also published asCA956368A1, DE2231679A1, US3868496
Publication numberUS 3748648 A, US 3748648A, US-A-3748648, US3748648 A, US3748648A
InventorsPugh C
Original AssigneeBurlington Industries Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Control mechanism for producing random-like effects on textile materials
US 3748648 A
Abstract
A novel circuit, having a number of novel subcombinations thereof, for producing alternate on and off signals which can be used to control one or more clutches which, when activated, produce a slub on a yarn or thread or a space between slubs or for controlling any other suitable circuitry or equipment. This circuit produces an extremely long pseudo-random pattern of effect dispersion to give a true random-like appearance in cloth which is woven from such slub yarns or threads. The minimum length of the spaces and slubs can be independently set on switches which are manually accessible from the exterior of the device and also the ratio between minimum and maximum slub and space widths can be also set on other switches. The circuitry automatically causes the length of the slubs and spaces produced to vary within this range defined between the minimum and maximum values, choosing in a pseudo-random manner successive ones of a fixed number of divisions within that range. In the embodiment described below, that fixed number is 14 divisions between the minimum and maximum length of the slubs and spaces. The circuitry can further be caused to operate in a mode whereby the space or slub length remains constant and another mode in which each of the possible separations in the pseudo-random pattern is produced in succession but not necessarily in order. Similarly, the circuitry can be caused, by manual operation of a switch on the exterior of the device, to produce a slub or space of maximum or minimum length.
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United States Patent Pugh [451 July 24, 1973 1 1 CONTROL MECHANISM FOR PRODUCING RANDOM-LIKE EFFECTS ON TEXTILE MATERIALS [75] lnventor: Charles D. Pugh, Burlington, N.C.

[73] Assignee: Burlington Industries, Inc.,

Greensboro, NC.

[22] Filed: July 1, I971 [21] Appl. No.: 158,961

[52] US. Cl. 340/1725, 331/78 [51] Int. Cl. 606i H02 [58] Fleld of Search 340/172.5; 235/152;

331/78; ll/Il [56] References Cited UNITED STATES PATENTS 3,492,587 lI1970 Hutton 331/78 3,208,008 9/1965 Hills 1 331/78 3,366,779 l/1968 Catherall 235/152 3,612,845 10/1971 Lawlor 331/78 3,614,399 10/1971 Linz 235/152 3,622,905 11/1971 Brown... 331/78 3,247,815 4/1966 Polevitzlcy..... 340/1725 X 3,529,298 9/1970 Lourie 340/1725 Primary Examiner-Raulfe B. Zache Assistant ExaminerSydney R. Chirlin Atr0rney-Cushman, Darby & Cushman [57] ABSTRACT A novel circuit, having a number of novel subcombina- V was 5 NFL tions thereof, for producing alternate on and off signals which can be used to control one or more clutches which, when activated, produce a slub on a yarn or thread or a space between slubs or for controlling any other suitable circuitry or equipment. This circuit produces an extremely long pseudo-random pattern of effect dispersion to give a true random-like appearance in cloth which is woven from such slub yarns or threads. The minimum length of the spaces and slubs can be independently set on switches which are manually accessible from the exterior of the device and also the ratio between minimum and maximum slub and space widths can be also set on other switches. The circuitry automatically causes the length of the slubs and spaces produced to vary within this range defined between the minimum and maximum values, choosing in a pseudo-random manner successive ones of a fixed number of divisions within that range. In the embodiment described below, that fixed number is 14 divisions between the minimum and maximum length of the slubs and spaces. The circuitry can further be caused to operate in a mode whereby the space or slub length remains constant and another mode in which each of the possible separations in the pseudo-random pattern is produced in succession but not necessarily in order. Similarly, the circuitry can be caused, by manual operation of a switch on the exterior of the device, to produce a slub or space of maximum or minimum length.

37 Claims, 20 Drawing Figures TOP o 28 fa r 11,:

Patented July 24, 1973 1'? Sheets-Sheet 5 www \mm mwM W\n M 1 M M m a up i I m m m 0 O 0 m m m m H 0 0 o I. Q N W .670 a h N Z L 0 b a b O n o w H w w w 0 w Num .0 h. 2 l o h |h 6 a o m i O o o o v I 0 r. U 0 0 0 v LA o o m m an U M W Q o W NI N1 0 0 0 0 N W "N m IN 0 0 N I \l U III 0\ 0 o o m m m 0 h Ir. 0 w w 29.5mm Mf m 29.8w N zoiumw m K m tufikm EQzmJ mam tut; WW W IFQZWJ UUqln wN \mw Ru n? vk w l M 2 0 Patented July 24, 1973 1'7 Shae ts-Sheet 7 Patented July 24, 1973 17 Sheets-Sheet 8 uzubtsw hum OCR ZO-FUNW km 43k N3 N3 mg Patented July 24, 1973 17 Sheets-Sheet 9 Patented July 24, 1973 17 Sheets-Sheet 11 NM 6% E I vm w r3552 INVEN'I Oh ATTORNEYS Can/u ESDRG-l/ BY%-Q-MV QM Patented July 24, 1973 l? Sheets-Sheet 11:1

M MWN I N VE NTOR C1024 as .D. Poe-1v Patented July 24, 1973 17 Sheets-Sheet 14 INVENTOR Gi /4 415.51). Pu 6-H BY/ l fi g y p ATTORNEYs Patented July 24, 1973 17 Sheets-Sheet 15 EQQQQR W kukbim' Patented July 24, 1973 l? Sheets-Sheet 16 W MM @f L. a N 4 M w 96 A m m hill! 0 W H m C mm H 0 MC 4 E P n r 3 Z M 7 I 0/ 7 5 a 0 l i a s 2 V w x M 3 y w a E 9 m 1 w J fig r 3 a Y 0 MC 005 0 B 4 /.R EfV-Q'P II II III. 9 mu r// N 2 [I 9 m Q p a 4 c H 3 f Iii-.. r r [m e V a r r 4 9 K/ MM HAM/9 VOLTS In SLUB CL rcH V OLTS VII SPACECLUTCH CONTROL MECHANISM FOR PRODUCING RANDOM-LIKE EFFECTS ON TEXTILE MATERIALS BRIEF DESCRIPTION OF THE PRIOR ART AND SUMMARY OF THE INVENTION The invention relates in part to a circuit for producing alternate electrical signals, the length of which is pseudorandomly determined, and to an apparatus for producing slub thread or yarn.

A slub is a thickened place in a yarn or thread which, when it unintentionally results, causes a flaw in any fabric which is woven from the thread or yarn. However, if these slubs are produced at unpatterned intervals along a thread or yarn, cloth which is woven from such yarn has a pleasing appearance and is widely used for draperies and other similar fabrics. Such yarns are referred to as slub or novelty yarns. However, unless the separation between adjacent slubs is random, or at least pseudo-random, the woven cloth will have undesirable patterns appearing in it which detract from its appearance and reduce its commercial value.

One way to produce this random slub effect in yarn or thread which is being spun is by deliberately over feeding the back roller in the drafting zone on the spinning frame. This can be accomplished by connecting an electric clutch to the back roller through a conventional gear train and a mechanical over riding clutch mechanism so that the electric clutch, when energized, connects a fast" speed to the back roll which increases the stock in the draft zone which in turn causes an enlargement in the yarn, such enlargement being a slub. The spinning frame gearing and speeds are set such that when the electric clutch is not energized the proper size of straight yarn will be produced.

One device currently employed for generating a pattern of on" and "off signals for the clutch to cause slubs to be produced employs a chain loop which has dogs on it which are either welded to the chain or whose position can be varied. The chain is driven around a fixed path so that the dogs successively close an electrical contact or otherwise cause the clutch to be actuated whenever a dog is encountered. Although the chain can be made to be a considerable length, the slub pattern is constant and repetitive enough so that undesirable patterns result in the woven product, which necessitate weaving on a multi-shuttle loom in an effort to reduce the patterning effect to a minimum. Varying the yarn slub pattern by changing the location of the dogs or replacing the chain is a tiresome and time consuming activity so that it is very difficult to in any way change or control the separation between adjacent slubs or the length of the slubs themselves.

Another device which has been employed for operating clutches of the type discussed above, includes a randomizer which consists of a combination of gears, cams and micro-switches. Each randomizer has four yarn design wheels with each wheel representing a different yarn style. The styles are created by the particular physical arrangement of cams on the design wheel and the sequence in which they energize the microswitches. As with the chain dog device, there is a defnite slub pattern which causes undesirable patterns in cloth woven from the yarn. The master slub control unit in this device can only control a limited number of frames and twelve has been that number in the past. In

addition, there is no way that the device can be programmed to respond quickly and rapidly to changes in styles and the only way that this can be accomplished is by changing the design wheels.

Yet another device now employed is similar to the chain type slub control mechanism and employs a precut punched paper tape which has been made in a length of 30 meters. This device permits production of yarn lengths up to 2720 or more meters without a pattern repeat. However, the only way that slub effects can be changed is to change the tape itself and this involves a lengthy and expensive tape punching process so that the variability of the device is quite limited. Further, the slub thickness, while variable, is variable only within very narrow limits.

The present invention relates, in one of its aspects, to a novel circuit, having a number of novel subcombinations thereof, for producing alternate on and off signals which can be used to control clutches of the type discussed above or for controlling any other suitable circuitry or equipment. This circuit produces an extremely long pseudo-random pattern of effect dispersion to give a true random-like appearance in cloth which is woven from such slub yarns or threads. The minimum length of the spaces and slubs can be independently set on switches which are manually accessible from the exterior of the device and also the ratio between minimum and maximum slub and space widths can be also set on other switches. The circuitry automatically causes the length of the slubs and spaces produced to vary within this range defined between the minimum and maximum values, choosing in a pseudorandom manner successive ones of a fixed number of divisions within that range. In the embodiment described below, that fixed number is l4 divisions between the minimum and maximum length of the slubs and spaces. The circuitry can further be caused to operate in a mode whereby the space or slub length remains constant and another mode in which each of the possible separations in the pseudo-random pattern is produced in succession but not necessarily in order. Similarly, the circuitry can be caused by manual operation of a switch on the exterior of the device to produce a slub or space of maximum or minimum length.

Many other objects and purposes of the invention will become clear from the following detailed description of the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. I shows a view of the front panel of a housing for the novel circuit of this invention with the switches which control the spaces and slubs manually accessible from the exterior of the housing;

FIGS. 2A and 2B show a block diagram of one embodiment of this invention for producing alternate pulses which in turn can then be employed to produce spaces and slubs on a yarn or thread;

FIGS. 3A through 3.! show a detailed circuit schematic of the embodiment of the invention shown in block diagram in FIGS. 2A and 28;

FIG. 4 shows a block diagram of the manner in which the various sheets comprising FIGS. 3A to 3] fit together to form the complete schematic;

FIG. 5 shows a simplified view of an apparatus for producing slub yarn whereby an electric clutch is energized to produce a slub;

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3208008 *Feb 12, 1963Sep 21, 1965Hills Richard ARandom width and spaced pulsed generator
US3247815 *Nov 6, 1962Apr 26, 1966Image Designs IncSystems and methods for reproducing colored patterns in carpets and other manufactured articles
US3366779 *Jul 20, 1965Jan 30, 1968Solartron Electronic GroupRandom signal generator
US3492587 *May 25, 1967Jan 27, 1970Westinghouse Air Brake CoRandom function generator
US3529298 *Aug 23, 1967Sep 15, 1970IbmGraphical design of textiles
US3612845 *Jul 5, 1968Oct 12, 1971Lawlor Reed CComputer utilizing random pulse trains
US3614399 *Aug 30, 1968Oct 19, 1971Linz John CMethod of synthesizing low-frequency noise
US3622905 *Sep 4, 1952Nov 23, 1971Us ArmyRandom pulse generator
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4311000 *Aug 29, 1979Jan 19, 1982Burlington Industries, Inc.Novelty yarn production
US5148586 *Feb 5, 1991Sep 22, 1992Basf CorporationCrimped continuous filament yarn with color-point heather appearance
US5619849 *Aug 26, 1994Apr 15, 1997Caress Yarns, Inc.Method and apparatus for producing randomly variegated multiple strand yarn in twisting together at least two yarns and yarn and fabric made by said method
US5673549 *Feb 12, 1996Oct 7, 1997Caress Yarns, Inc.Method and apparatus for producing randomly variegated multiple strand twisted yarn and yarn and fabric made by said method
US5901544 *Feb 12, 1997May 11, 1999Caress Yarns, Inc.Method and apparatus for producing randomly variegated multiple strand twisted yarn and yarn and fabric made by said method
USRE31808 *Feb 4, 1983Jan 22, 1985Burlington Industries, Inc.Novelty yarn production
CN100443643COct 31, 2005Dec 17, 2008株式会社丰田自动织机Device for producing special yarn
DE2522247A1 *May 20, 1975Nov 27, 1975Matsushita Electric Ind Co LtdKanalwaehler
EP1662027A1 *Oct 11, 2005May 31, 2006Kabushiki Kaisha Toyota JidoshokkiDevice for producing special yarn
Classifications
U.S. Classification700/130, 28/252, 331/78
International ClassificationH03K3/00, D01H5/36, D01H5/00, H03K3/84
Cooperative ClassificationD01H5/36, H03K3/84
European ClassificationH03K3/84, D01H5/36
Legal Events
DateCodeEventDescription
Nov 9, 1987ASAssignment
Owner name: BI/MS HOLDINGS I INC., A DE. CORP.
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:BURLINGTON INDUSTRIES, INC.,;REEL/FRAME:004811/0598
Effective date: 19870903