|Publication number||US3748648 A|
|Publication date||Jul 24, 1973|
|Filing date||Jul 1, 1971|
|Priority date||Jul 1, 1971|
|Also published as||CA956368A, CA956368A1, DE2231679A1, US3868496|
|Publication number||US 3748648 A, US 3748648A, US-A-3748648, US3748648 A, US3748648A|
|Original Assignee||Burlington Industries Inc|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (8), Referenced by (9), Classifications (11), Legal Events (1)|
|External Links: USPTO, USPTO Assignment, Espacenet|
United States Patent Pugh [451 July 24, 1973 1 1 CONTROL MECHANISM FOR PRODUCING RANDOM-LIKE EFFECTS ON TEXTILE MATERIALS  lnventor: Charles D. Pugh, Burlington, N.C.
 Assignee: Burlington Industries, Inc.,
 Filed: July 1, I971  Appl. No.: 158,961
 US. Cl. 340/1725, 331/78  Int. Cl. 606i H02  Fleld of Search 340/172.5; 235/152;
331/78; ll/Il  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  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;
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|EP1662027A1 *||Oct 11, 2005||May 31, 2006||Kabushiki Kaisha Toyota Jidoshokki||Device for producing special yarn|
|U.S. Classification||700/130, 28/252, 331/78|
|International Classification||H03K3/00, D01H5/36, D01H5/00, H03K3/84|
|Cooperative Classification||D01H5/36, H03K3/84|
|European Classification||H03K3/84, D01H5/36|
|Nov 9, 1987||AS||Assignment|
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