A SYSTEM AND A TYING UP STRING FOR TYING UP A HAND LOOM

Abstract: At hand looms a plurality of moveable parts of the loom are interconnected by means of so called tying up strings, which have hitherto been manually tied to the different loom parts. It is now proposed a system for a simplified and improved attachment of these tying up strings whereby the very tying up string (100) consists of a crochetted string shaped as a continuous series of loops, which are used for effecting the interconnection of said loom parts (7, 11) either alone, in pairs, and/or with or without separate fitting members (102, 103) thereby eliminating the manual tying work.

Description: A SYSTEM AND A TYING UP STRING FOR TYING UP A HAND LOOM Background of the invention Conventional hand looms are provided with a plurality of strings or threads, which are used for tying up the loom. These strings extend e.g. between treadles and lambs, between lambs and shafts, from one shaft via a pulley to another shaft etc. These strings are generally attached to their different attachment points by being slipped through holes in their associated parts and thereafter being manually provided with knots. Due to the fact that a large number of strings must be provided with knots in accurate positions in order to set up the loom correctly and as these knots must often be made in uncomfortable and difficult working postures - particularly for tying up lambs and treadles which oftenly must be made thus that the person making the job creeps into the loom and sits down adjacent the treadles - is the tying up an extensive and uncomfortable manual work. These strings are furthermore during weaving subjected to a considerable wear, whereby the strings after a comparatively short time's service will burst and must be replaced, which means a repeated work. In order to increase the lifespan of the tying up it has in later years been tried to use synthetic string material which has a considerably larger strength than the traditional textile strings. These synthetic strings have from wear aspects been superior to the textile strings but it has instead been difficult to make reliable knots thereon as the more slippery- material means that the knots have a tendency of "sliding" and to become untied when exposed to stresses. Summary of the invention The purpose of the present invention is to provide a tying up system by aid of which the dif iculties and drawbacks mentioned hereabove are eliminated and this is obtained thereby that it is used tying up strings, which consist of a continuous series of loops each two adjacent loops of which are separated from each other by a short interconnecting rib, said tying up strings being adapted to be fixed to the associated loom component by fitting at least one of said loops to said loom component at any convenient position along the length of the tying up string with or without ' use of separate fitting members under elimination of the conventional manual tying work. The invention also includes a tying up string intended. to be used in the system according to the invention and this string is characterized thereby that it consists of at least two crochetted threads, which are brought alongside each other and are inter¬ connected by crochetting in such a manner that it consists of a continuous series of loops, each tv.o adjacent loops of which are separated by a short interconnecting rib. Description of the drawings The invention will hereinafter be further described with reference to some embodiments shown in the accompanying drawings. Figure 1 shows in a schematic side elevation a hand loom, Figure 2 is a fragmentary view showing the conventional tying up of the shafts, lambs and treadles of the loom, Figure 3 is a schematic view of a tying up string according to the invention, Figure 4 shows in a schematic side elevation in perspective tying up of a shaft stick to a shaft carrier by means of different fitting details of the system according to the invention, Figure 5 is a detail from figure 4 shown in elucidated fashion, Figure 6 is an embodiment of a stop of the type incorporated in the system according to the invention, and Figure 7 shows an embodiment of a hook member of a type which also forms part of the tying up system of the invention. Description of some preferred embodiments Figures 1 and 2 show in a schematic side view and a fragmentary frontal view resp. a hand loom and its conventional tying up system. The loom includes a stand 1 which i.a. carries a sley 2 . a warp beam 3 and a cloth beam 4. The stand furthermore carries the heald bar 5. which again carries pulleys 6, which then again - commonly via shaft carriers 11 (see figure 2) - via tying up strings 10 carry the shafts , 7' s which form the suspension for the healds 12. The movement of the shafts is controlled by treadles 8, which by aid of tying up strings 10 - commonly via lambs 9 - are connected to the lower shaft 7'. In figure 2 is shown the connections between the tying up strings and the different loom components - C , _ < A U OMPI W1PO such as heald bar 5, shaft carriers 11, shafts 7, 7', lambs 9 and treadles 8 - to which these strings are connected in conventional manner by means of manually tied knots 13, which therefore on one hand has a tendency of sliding and on the other hand means an extensive manual work when setting up the hand loom. In figure 3 is schematically shown in exaggerated scale a tying up string of the type included in the invention and which is the most vital part of the system according to the invention. As can be seen in this figure the string 100 consists of two threads 104, 105 which are brought along¬ side . each other and which - preferably in a hosiery machine - have been crochetted together in such a manner that they form a single series of loops 101, which are separated - and interconnected - by means of intermediate short "ribs". In the figure is shown only one complete loop 101 but it is to be understood that the. string forms a continuous series of essentially similar and equally large loops 101. Figure 4 shows schematically in perspective the tying up between a shaft carrier 11 and upper shafts 7 and the figure shows different methods- of attach¬ ment. The shaft carrier 11 is connected to a not shown pulley via a centrally located tying up string 100 which extends through a hole 106 in the shaft carrier. A fitting member formed as a stop element 102 is inserted through the loop situated nearest to the shaft carrier on the side thereof turned from the pulley and this stop element is larger than the hole 106 and it will thereby prevent the tying up string from being pulled back through O the hole . At both ends of the shaft carrier there are attached other tying up strings 100 which are connected to the shafts 7- The strings are at the ends of the shaft carrier preferably attached thereby that such as shown in figure 5 the series of loops 101b is slipped through the outmost loop 101a of the string, whereby is formed a running noose, which can be arranged about the end of the shaft carrier in the groove therein. The tying up string 100 is furthermore attached to the bottom side of the upper shaft 7 by being slipped through a hole 106 and fixed ' to the shaft by.having a loop 101 hooked to a hooking member 103. In figure 6 is shown in bigger scale a stop element 102 of the type shown in figure . . This stop element is designed essentially as a "dog's bone" i.e. it incorporates a rod shaped intermediate portion having a cross-sectional size which is less than the opening of a loop 101. At the ends of the rod shaped member there is provided enlarged material portions the cross sectional size of which is bigger than the intermediate portion and essentially equal to or even somewhat bigger than the opening of the loop. It is hereby possible to insert the stop element in any desired loop by pressing it into the loop possibly under use of the flexibility of the thread for stretching the loop during the inserting of the stop element. When the stop element has been put in place it will efficiently prevent the string from unintendedly being pulled out of the hole 106 and as the force in the string will be mainly perpendicular to the longitudinal direction of the stop element is it ascertained that the stop element will not be pulled out of the loop. In figure 7 is shown an embodiment of a hook member 103 of the type intimated in figure 5- The hook member comprises a base member which can be fixed to the loom component, to which the tying up string in question shall be attached. On the base member there is arranged a hook, which preferably is somewhat elastic and intended to be hooked by a loop 101. By using a suitable design of the hook member together with the fact that the string in its service position is subjected to a pulling force acting in the direction away from the hook member 103 is it ascertained that the tying up string will be reliably retained against undesired unhooking from the hooking member. In this manner it is very easy to attach the tying up strings exactly in their desired positions without the problems which are usual at hand tying. It is also easy to unhook the connections when this is desired e.g. for replacement of worn out strings, According to the system of the invention the entire tying up work will thus be simplified and reduced to a considerable extent. The material in the tying up string 100 is a wear- resistant, somewhat flexible, preferably synthetic material. It is of no importance if this material is slippery as there can exist no sliding in the crochetted loops, whereby the sliding problems usual at the synthetic tying up strings provided with hand-tied knots are entirely eliminated. The invention has been described in connection with the most essential tying up operations, which will come up at a hand loom but it is to be understood that also other tying up cases present at hand looms or the like can be favourably incorporated OM in the system according to the invention. It is of course furthermore evident that the invention is not limited to the part solutions shown in the accompanying drawings and described with reference thereto but modifications are possible within the scope of the appended claims.

Claims: C L A I S 1. A system for tying up a hand loom, c a r a c ¬ t e r i z e d t h e r e b y, that it is used tying up strings (lOO)which consist of a continuous series of loops (101) each two adjacent loops of which are separated from each other by a short, interconnecting rib, said tying up strings being adapted to be fixed to their associated loom component (5, 6, j 8, 9) by fitting at least one of said loops to said loom component at any convenient position along the lenght of the tying up string with or without use of separate fitting members (102, 103) under elimination of the conventional manual tying work. 2. The system claimed in claim 1, wherein the tying up string in conventional manner is slipped through holes arranged in the loom component from one side thereof to its other side, c h a r a c ¬ t e r i z e d t h e r e b y, that it is used fi.tting members formed as stop elements (102) arranged to be thread through the loop (101) situated nearest to the loom component on its other side, which stop element is of such size as to render impossible the pulling back of the tying up string through the hole (106) when fitted in a loop. 3. The system claimed in claim 2, c h a r a c ¬ t e r i z e d t h e r e b y, that the stop element (102) is rod shaped and has enlarged end portions, which have such size as compared to the loops, that these must be stretched out somewhat to be able to pass over said end portions. k . The system claimed in claim 1 wherein tying up strings in conventional manner are slipped through holes arranged in the loom component from one side thereof to the other side thereof, c h a r a c ¬ t e r i z e d t h e r e b y, that it is used fitting members formed as hook members (103) attached to the other side of the loom component (5, β, 7, 8, 9) and adapted to receive in hitching cooperation a loop (10) situated adjacent thereto. 5. A tying up string intended to be used in the system claimed in claim 1, c h a r a c t e r i z e d t h e r e b y, that it consists of at least two crochetted threads (104, 105), which are brought ' alongside each other and interconnected by crochetting in such a manner that it consists of a continuous series of loops (101), each two adjacent loops of which are separated by a short interconnecting rib. 6. The tying up string claimed in claim 5, c h a - r a c t e r i z e d t h e r e b y, that its threads consist of a v"ear-resis iήg, somewhat 're'siiien. and preferably synthetic material.

Inventors: IVARSSON S
Applicants: IVARSSON S
Application year: 1979
Main classification: D03D29
IPC codes: D03C13, D03D29, D04B31