US2324564A - Nose board for axminster looms - Google Patents

Description

July 20, 1943. I a J. DACEY 2,3

- uosi; BOARD FOR AXIIINSTER Looms Filed Dec. 26,-1941 Fin. 1

. v INQEN'roR I 5- EDWAQBIDAMY 35 F I 6444.1

A'r'ronusv Patented July 20, 1943 a r NOSE BoARn FOR AXMiNSTER LOOMS Edward .LDamm-Worcester, Mass, assignor to Crompton &

Knowles Loom Works, Worcester,

Mass, a corporation of Massachusetts Application December 26, 1941, Serial No. 424,456 (oi. 139-9) 60mins.

This invention relates to improvements in Axminster looms and it is the general object of the invention to provide a nose board having teeth so shaped as to facilitate removal of lint from the slots between the teeth and facilitate entry of yarn guide plates between the teeth.

A form of Axminster loom which has gone into general use employs a cloth or noseboard from the rear edge of which project a series of spaced vertically disposed teeth between which lie slots to receive the reed dents and also guide plates which align with the reed dents to define yarn guide aisles. During the tuft forming operation the color yarns on the tube frame project through the warp sheds and are bent upwardly over the teeth of the nose board to form tufts. During this step in the operation the guide plates are in close proximity to the reed dents and prevent lateral displacement of the tuft yarns.

The fibers of which the tuft yarns are formed have a tendency to break off and collect as lint in the guide slots to such an extent as'to inter fere with the proper operation of the reed dents and the guide plates. It is an important object of my present invention to taper the nose'board teeth in such a way that the guide slots'between them are downwardly divergent. In such a construction the lint and fibers tend to fall out of the slots, particularly when they are disturbed by either the reed dents or the guide plates.

It has also been found necessary in the past to preserve accurate spacing of the guide plates so that they will align with their respective reed dents because of the fact formed with parallel sides. of my present invention to relate the downwardly diverging slots to the guide platesin such a way that those portions of the guide plates which first enter the slots do so at a relatively low point, thereby rendering,unnecessaryfthe exact spacing necessary in previous constructions. As the separator plates move rearwardly their forward portions enter higher parts of the slots which are narrower and assist in aligning the guide plates with the reed dents. By this construction any guide plate which is bent slightly from its proper position will be able to enter a W widepart of its guide slot and thereafter be positioned by the upper narrower part of the slot so that it-will cooperate with the reed'to form proper guide aisles for the tuft yarns The advantage of the self-cleaning feature and alignment of the guide plates are both attained by tapering the nose board teeth as already described. While the description and drawing to that the guide slots were' It is a. further object theteeth are curved as at is supportedby levers 31,-on'e do not wish necessarily l With these and other objectsin'view which odically to admit pick of weftin'the usual manner;

be set forth hereinafter relates to nose board teeth which provide uniform divergence of the slots, I

to be thus limited.

will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth. it

In the accompanying drawing wherein a convenient embodiment of my invention is set forth,

Fig. 1 is a vertical section through a portion of an Axminster -loom showing a nose board formed according to my invention, 1

Fig. 2 is an enlarged-view of a portion of Fig. 1, Fig. 3 is a rear elevation looking in the direction of arrow 3, Fig. 2,showing a preferred for' nbf the invention,

Fi 4 is a view similar modified form, and a a Fig. 5 is a. diagrammatic view showing the manher in which lint falls from the spaces between the preferred form nose board teeth. 1

Referring to Fig. 1, I'havesho'w-n a loom frame ID on WhiChiS mounted a lay shaft III -to be rocked each pick of the loomi to advance a reed R having dents I 2. The topand bottom warp sheds I3 and M, respectively, are separated pena needleN which lays a double The breast beam I5 supports a clothboardlfi along therear edge of which are cut a 'seriesof vertical teeth 11 separated by slots I8. The rear surfaces: of I 9" and the upper part of each tooth may be formed witha hook 20 projecting above and behind the flat uppersurface .2l'on'whichthefabricFrests. J w v The loom is provided with the usual tube frame to Fig. 3 but showing a transporting chain not shownip ft v 'ded with a number of tube frames one of which isshown at r 25 in Fig. 1. The tube frame intuit forming position is supportedon transfer arms 26 which disconnect the tube frame from the transporting chains and return it to the chains afterthe'tuft is formed. The tube frame has afset ofzyarn tubes 2'! from'which project thetuft forming yarns Y.- Front and back" cutter blades, Bil-and 3|, respectively, are provided forcutting the tufts from the yarnsicarried by the tube frame.

Mounted under thejcloth board is;arseries of separator or guide plates 35, one for each; reed dent, mounted on an angleir. n36 which in-turn of whichis shown in Fi 1. The leverslaremountedTon pivot'sg38 supported by. a bracket 39"fixed with respect. to the loom frame. 1 Operatingrods Alone-of which is shown inFigQl operate to oscillate the levers 31 every third pick of the loom, or on tuft forming beats thereof, when the fabric being woven is a so-called three-shot Axminster. Each guide plate 35 moves through a slot I8 in the nose board and is moved rearwardly while the lay is in rear position so that said plates and the reed dents with which they align form guide aisles for the tuft yarns Y.

In the operation of the mechanism thus far described the lay swings backwardly and forwardly each pick of the loom and the needle lays a double pick of weft. On every third beat of the loom a tube frame is lowered to project its tuft yarns through the warp sheds and behind the teeth [1. On this beat of the loom the plates 35 are first moved rearwardly and then moved forwardly with the lay, the tuft yarns moving up the surface l9 and over the hooks to positions in front of the latter as the lay advances. The tube frame is then lifted to pull off enough yarns for the next row of tufts to be formed by it, after which the tufts are cut from the tube frame by the blades and 3|.

The mechanism thus far described may be of usual construction and operate in the ordinary manner. It is found that manipulation of the yarns and also cutting thereof releases a number of small fibers or lint which collect in the slots [8 as heretofore constructed to such an extent as to interfere with the proper operation of the reed dents l2 and the plates 35. It is also found in previous constructions that if any of the plates are bent slightly from their normal position they will not enter the slots [8, in nose boards but will engage a tooth l1 and be further damaged.

In carrying my present invention into effect I alter the shape of the lower ends of the teeth I! either as shown in Fig. 3 or in Fig. i. In the preferred form shown in Fig. 3 the sides .45 of the upper parts of the teeth l1 remain vertical as heretofore but the lower ends of the teeth are tapered to converge downwardly as at 46 to form downwardly divergent lower portions 4] of the slots l8.

Referring more particularly to Fig. 2, and having in mind the location of pivot 38 and also the shape of the plates 35, it will be seen that the latter are formed with a top edge 50 the front end or corner 5| of which moves along a relatively high are a which extends through the upper part of the slots l 8.- The rear end of edge 50 indicated at 52 moves along a second arc 2) lower than are a. It will therefore be seen that as the plates 35 move rearwardly their rear advancing corners 52 enter relatively wide parts of the downwardly diverging slots, after which the forward parts of the plates enter the upper parts of the said slots which are more restricted to enable the teeth I! to align the plates 35 with their reed dents. By the relation just described it will be seen that the rear edge 55 of each plate 35 moves along a relatively low path whereas the forward edges 56 as well as the top edge 50 move along somewhat higher paths, resulting in the advantages already mentioned.

As indicated in Fig. 5 the loose fibers released from the yarns during the weaving operation collect as lint L in the slots between the teeth 11. The movement of the reed dents and the plates 35 through these slots disturb the'lint and it tends to fall due to the downwardly divergent shape of the slots in which it is located. In Fig. 5 lint which has fallen in widened parts of the slots is indicated at M and is free to fall from the nose board when the plates 35 are in forward position and the reed R is in rearward position.

In the modified form of the invention shown in Fig. 4 the slots 18 are tapered throughout their length by forming the teeth H with inclined sides 60. In this form of the invention the plates 35 enter relatively wide parts of the slots as with the preferred form and as the plates continue to move rearwardly the upper parts thereof move to restricted parts of the slots and are thereby moved into alignment with their corresponding reed dents should the plates be slightly bent. The continuous taper from the top to the bottom of the teeth shown in Fig. 4 also facilitates removal of lint as described in connection with Fig. 5.

From the foregoing it will be seen that I have provided a nose board constructed with teeth which taper downwardly for the purpose of forming between them guide slots which are wider at their lower ends than at their upper ends.

The advantage of this construction is two-fold,

first, the slots tend to clear themselves of accumulating lint and stray fibers, and second, any guide plate which is bent laterally to a slight extent from its correct position will be directed into alignment with its reed dent to form proper guide aisles for the tuft yarns. The reed dents and guide plates move through the slots in such a way as to disturb lint and the slots, being widened at their lower ends, facilitate dropping of the lint out of the slots. It will further be seen that those portions of a guide plate which first enter its slot traverses a path which is relatively low and passes into the slot at relatively wide portions thereof, after which the forward and higher portion of the guide plate moves into the upper and narrower portion of the slot to facilitate alignment of the guide plate with its reed dent if it happens to be bent.

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is:

1. In an Axminster loom having a lay provided with spaced reed detents movable forwardly from a rear position, a set of spaced guide plates each in alignment with the reed detent corresponding thereto, each guide plate having a top edge, means to move the plates rearwardly toward the reed dents and cause the rear end of said top edge to travel along a path below the path traversed by the front end of said top edge, and a cloth supporting nose board having teeth spaced by slots in which lint tends to collect during the operation of the loom, said slots being located to receive the reed dents and said guide plates, said slots diverging downwardly to cause the rear end of said top edge of each guide plate to enter a relatively wide part of the corresponding slot to facilitate entry of said guide plate into its slot, rearward motion of said guide plates moving the front end of said top edges thereof into a higher and narrower part of said slots to assist in aligning said guide plates with theirrcorresponding reed dents, and the plates tending .as they move through said slots to dislodge the lint in the latter and the downwardly diverging slots facilitating removal of the lint by gravity.

2. In an Axminster loom having a lay provided with spaced reed dents movable forwardly from a rear portion, a set of spaced guide plates each in alignment with a reed dent corresponding teeth spaced by slots in which lint tends to collect during the operation of the loom, said slots being located to receive the reed dents and said guide plates, said teeth being tapered downwardly to be thinner at their lower ends than at their upper ends to cause said guide slots to be relatively wide at their lower ends and converge toward their upper ends, the rear part of said top edges of the guideplates entering relatively wide parts of said guide slots and the front ends 3 of the top edges of said plates traversing a path higher than that traversed by the rear ends of said top edges and moving into relatively narrow parts of said slots to assist in aligning the guide plates with the reed dents, and the plates tending as they move through said slots to dislodge the lint in the latter and the downwardly diverging slots facilitating removal of the lint by gravity.

3. In an Axminster loom having a lay provided with spaced reed dents movable forwardly from a rearposition, a set of spaced guide plates '1. each in alignment with the reed dent corresponding thereto, means to move the plates rearwardly toward the reed dents, and a cloth supporting nose board having teeth spaced by slots in which lint tends to collect during the operation of the loom, said slots being located to receive the reed dents and said guide plates, each guide plate having a rear edge which traverses a relatively low path as the guide plates are moved rearwardly and said guide plates having front portions which traverse a path above said low path as said plates are moved rearwardly, the teeth of said nose board being so formed as to cause the guide slots to be downwardly divergent to cause the rear edge of each guide plate to enter a relatively wide part of the corresponding slot during the first part of the rearward motion of said guide plates, after which the forward part of said guide plates enters narrower portions of said slots to assist in aligning the guide plates with their respective reed dents, and the plates tending as they move through aid slots to dislodge the lint in the latter and the downwardly diverging slots facilitating removal of the lint by gravity.

4. In a cloth board for an Axminster loom having spaced reed dents and spaced guide plates in front of said reed dents to be aligned with the latter, said cloth board formed with an elongated body from the rear edge of which project horizontally spaced vertical teeth, the lower ends of said teeth being tapered downwardly to form between them guide slots for the guide plates and reed dents which diverge downwardly to facilitate removal of lint in said slots by gravity when the lint is disturbed by said guide plates and reed dents.

5. In a cloth board for an Axminster loom having spaced reed dents and spaced guide plates in front of said reed dents to bealigned with the latter, said cloth board formed with an elongated body from the rear edge of which project horizontally spaced vertical teeth between which extend guide slots, the teeth of said cloth board being so formed as to cause the upper ends of said guide slots to be narrower than the lower end thereof to facilitate entry of the guide plates into a relatively low part of said guide slots, the parts of said teeth adjacent to the upper parts of said guide slots serving to assist in aligning the guide plates with the reed dents, and the lower parts of the slots because of their greater width than the upper parts of the slots facilitating removal of lint by gravity in said slots when the lint is disturbed by said plates and reed dents.

6. In an Axminster loom having a lay provided with spaced reed dents movable forwardly and operating with a set of spaced guide plates each in alignment with the reed dent corresponding thereto, means to reciprocate the guide plates toward and from the reed dents, and a cloth supporting nose board having teeth spaced by slots in which lint tends to collect during the operation of the loom, said slots being located to receive said guide plates as the latter reciprocate, said teeth being so formed that the slots between them diverge downwardly so that the lower ends of the slots offer less resistance to the removal of lint than the upper parts of the slots when the guide plates by their movement through the slots disturb the lint in said slots.

EDWARD J. DACEY.

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