US1973335A - Axminster loom - Google Patents

Description

Sept. 11, 1934. E J, DACEY AXMINSTER LOOM Filed April 13. 1933 2 Sheets-Sheet 1 ummm ummm J. Uacex) Y @Liane y s Sept. ll, 1934. E, 1 DACEY 1,973,335

AXMINSTER LOOM Filed April 13, 1933 2 *Sheets-Sheet 2 Swuentor @Edward l Uaceg Patented Sept. 11, 1934 Fries AXMINSTER LOOM Edward J. Dacey, Philadelphia, Pa., assignor to Crompton & Knowles Loom Works, Worcester, Mass., a corporation of Massachusetts Application April 1s, 193s, serial No. 665,917

14 claims. (ci. 13s- 9) This invention relates to improvements in looms for weaving Axminster carpets having the pattern on the back, and it is the general object of the invention to provide improved means to operate the guide plates set forth in application Serial No. 575,190 filed jointly by Robertson and myself.

In the loom set forth in saidapplication there are provided thin parallel guide plates mounted under the cloth and movable rearwardly during the tuft forming operation until they are in substantial alignment with the advancingreed dents. The yarn tubes on the tube frame are moved between the plates and the projecting color or tuft forming yarns are intended to lie between the plates so that as the pick of filling behind the tuft yarns moves over the nose board the yarns will be guided rearwardly and upwardly between the reed dents.

When being projected downwardly by the tube frame the tuft yarns must pass between the binder and stuffer warps and must also lie between the spacer plates, and I have found that there is a tendency for large or crinkly yarns to stick either on the binder warps or the upper edges of the plates. Such yarns do not move to their proper position, with the result that they may not be in front of the weft laying needle when the latter inserts the tuft forming pick, or they may project rearwardly behind the plates and be deflected laterally to be pinched between the plates and the reed dents.

It is an important object of my present invention to provide means for oscillating the plates so that the yarns which are likely to remain in improper position are jarred loose or vibrated so that they tend to spring down to their proper position prior to the insertion of the pick of filling. There are three distinct mechanisms which have contact with the tuft forming yarns during this part of the operation, namely, the yarn tubes of the tube frame, the plates, and the reed dents. An oscillation or vibration of any one or more of these three devices can be effected to disturb or unseat a sticking tuft yarn, but I prefer to show herein means, such as a multi-point cam, to vibrate the plates. It is to be understood, however, that the principle of the invention is not limited to vibrations of this particular mechanism.

In the aforesaid application the separating and guiding plates are described as moving rearwardly while the tube frame is rolling to its forward position. I have found that the loom may be so operated as to complete the rolling of the tube frame to place the yarn tubes substantially verfull forward movement of the tube frame with its normal tendency to movethe tuft yarns to their forward position is completed before the guide plates move rearwardly. This mode of operation alfords the tuft'yarns a better opportunity to assume their proper downward projecting pol sitions and there are as a result fewer sticking yarns to be jarred into position bythe vibrating guide plates. i I

With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims.

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

Fig. 1 is a vertical transverse section taken through a loom showing the separator plates in normal forward position and the lay in forward beating up position after the formation of a tuft,

Fig. 2 is a detail top plan view, part removed, of the reed, nose board and plates, looking down at arrow 2, Fig. 1, and

Figs. 3, 4, and 5 are diagrammatic views indicating the method of operating certain parts of the invention.

Referring to the drawings, I have shown a transporting chain C and sprocket 10 on the pull-over shaft 11. The tube frames are moved one at a time from the chain toward cloth forming position as is usual in Axminster looms. The tube frame T which is shown in tuft forming position is supported by transferrer arms 12 one of which is shown in Fig. l. These arms are provided with clutches 13 rocked by actuator rods 14 around pivots l5 on the arms. These arms give the frame its various operating movements, after which the tube frame is restored to the chain and the latter is advanced to bring the next tube frame into position.

The back and front knives 16 and 17, respectively, coact to cut the tufts from the tube frame after the tufts have been formed and after they have been tensioned by raising the tube frames to effect the pull-off for the next row of tufts.

Lay 18 is provided with a series of reed dents `19 and is supported' on swords 20 which rock about a lay shaft 21. The latter is given its operating movements substantially in accordance with `the aforesaid application, and holds 'the reed in rear position tov permit the insertion so that the latter can move between said iingers,

as suggested in Fig. 1. Each ringer is provided with an upstanding hook 28 having a rear down-` wardly inclined face 29. The binder warps B in front of said hooks.

An oscillating shaft 30 mounted on the loom frame carries a plurality of arms 3ll having 11p-- ward extensions 32 across which extends a bar 33. The latter is provided with a plurality of guide plates 34 having their upper ends located in the spaces between the fingers 27 and in su1V stantial alignment with the. reed dents. By means of an actuating shaft 35 rocking in the loom frame power is transmitted through a connection 36 as set forthin the aforesaid application to cause Vmovements of the` plates 34 toward and from the. reednof the loom. Y Power ordriving the shaft 35 is derived from a bottom shaft 40 which has secured thereto a cam web 41 on which is secured a cam tappet 42. A roll 43 on cam lever 44 is positioned to transmit driving force from the tappet to the lever and the latter may have a connection, as by rod 45,

, with arm 46 movable pivotally about shaft 35 and havingV a rear extension 47 operatively connected tothe guide plates. l

The matter thus far described may be substantially the same as shown in the aforesaid application. In thepresent instance, however, I vary the form of the cam 42 from that shown in the application and also delay the time of its action with respect to the plates untilafter the tube frame has assumed such a position that the tutt yarns are substantially vertical and lying immediately behind the nose board.

In carrying my invention into effect I provide the tappet with an inclined surface effective when the cam disk rotates in the direction of arrow A, Fig. 1, to push the lever 44 to the right, thus raising the arms 47 to project the plates 44 rearwardly. The cam is formed with several points 61, 62, 63, etc., which are spaced by depressions, the effect of the alternating points and depressions being to oscillate the lever 44 and produce a back and forth vibration of the guide plates when theyare substantially in rear position. The cam tappet has a decline 'down which the roll 43 rolls when the plates are moving forwardly with the lay. The dwell 66 on the disk 41 maintains the plates in 'their normal forward position. Other cam tappets not shown may be on the web 4l to give the lay other beats, as set forth in the aforesaid application.

It is to be understood that the cam tappet 42 is operative only on that pick of the loom during which the tuit is being formed, and the timing of the shaft 49 is such that two or three or more picks oi weft may be laid by the needle between tuft forming operations.

Referring to Figs. 3, 4 and which set forth the sequence of operations controlled by the tappet 42, I have shown the plates 34 moved to a position somewhat behind that shown in Fig. 1 by engagement oi the roll` 4,3.withV the lower part of the incline 60. When the roll reaches the top of the rst projection 61 the plates 34 are in the rear position shown in full lines in Fig. 4, and as the roll enters a depression the plates are moved back to the position shown in light dotted lines in said gure by tension spring between lever 44 and the loom frame. rIhis reciprocation of the plates set forth in the full and dotted line positions in Fig. 4 continues as the roll 43 moves over the parts of the cam tappet between the surfaces 60 and The effect of this oscillation is to jar loose 'any of the tuft yarns Y which might stick either on the warp threads or the upper edges of the Y l plates. pass between the hooks and the formed tufts lie As the roll moves down the decline 65 the plates 34 will move `forwardly practically in engagement with the reed dents as the latter advance.

Fronrthis description it will be seen that the movement of the lay is timed with the movement oi the earn tappet so that the guide plates and-the reed move forwardly. Y

v Another feature of my invention relates to the control of the tube -frame with respect to the time of .movement of the guide plates. As distinguishedvfrom the procedure set forth in the prep viously mentioned4 joint eo-pending application, l'

I prefer to bring the tube fra-me 'I' to the-posie tion shown in Tcl-igt with ,the yarn tubes lsubstantially in v ertical position and lying just behind-.the fingers of the. nose boardbefore the guideplates start their rearward movement. f

4The guide plates are then moved rearwardly and then oscillated, as 4previously described. In this way the tuft yarnsl are moved to theirv most advanced position before the guide plates lmove v A rearwardly and the tufty yarns have time to "-1:

straighten themselves.. The yarns therefore are in i a iavorable condition toreceive the guide plates, and an eiective aligning of the yarns follows. VThis result I achieve by `delaying the camming action'of the tappet 42, since I prefer to keep the time of movement of the tube frames ,substantially as they exist in the ordinary AX- minster loom.

From the foregoing it will b e seen that I have provided means for giving the guide plates an os- 3: l

cillatory movement which willv vibrate the tuft yarns so that any of them which are sticking in improper positions may be jarred loose. This result is accomplished herein by a movement of the separator or guide plates, although I do not wish to be limited to this particular means of agitatinglvthe tuft yarns for thepurpose of permitting theV latterjto align themselves. 'l It will also be .seen-that Ik have delayed the rearward movement of the guide plates until after the yarn tubes are in their forward position, the effect of this operation being to ,permit the tuft yarns to assume as nearly aspossible their proper positions before subjectingrthem to any forces which would tend to move them rearwardly. It is to be understood that the tube frame may be raised during/the vibration `ci the separator plates, so that the yarn tubes 75 do not necessarily remain in the position shown in. Fig. 4 throughout the entire v, vibration of the plates.

The subjectmatter of this application may if desired be used in conjunction with the mechanisrn kset forth incopending application Serial No. 636,257 filed by Robertson which latter application ,discloses without claiming the vibration feature set forth herein.

Having ,thus described' my invention it will be seenA that changes and` modications may be I made therein by those skilled in the art without 'departing from the spirit'and scope of the inetarras yarn guiding set, and means to vibrate one set.

relatively to another set to loosen any yarns which are improperly placed. i

2. In an Axminster loom operating with binder warps and having a transporting chain and a tube frame to be moved from the chain to tuft forming position, a series of guide plates under the fabric being woven and substantially parallel to I the binder warps to guide the tuft yarns of the tube frame 'to enter the spaces between the binder warps, and means to vibrate said guide plates to insure free movement of the color yarns to positions between said plates.

3. In an Axminster loom operating with a transporting chain and a tube frame having tuft yarns movable from the chain toward the cloth and binder warps to form a row of tufts, a reed having dents, a series of plates in front of the reed in substantial alignment with the dents and dening with the reed a series of guide aisles substantially parallel to the binder warps, the tuft yarns moving during the tuft forming operation along the guide aisles, and means to vibrate the plates in a direction substantially parallel to the reed dents to free any tuft yarns which may stick to the plates.

4. In an Axminster loom having the tube frame provided with yarn tubes from which project tuft yarns, the yarn tubes moving from a rearwardly projecting position forwardly to a substantially vertical position during the first part of the tuft forming operation, guide means to space the tuft yarns from each other, mechanism to vibrate the guide means and thus free any color yarns which may stick to the guide means, and means eiective thereafter and during the latter part of thev uit forming operation to curve the downwardly extending color yarns backwardly and then upwardly toward the tube frame.

5. In an Axminster loom operating with a tube frame having tubes from which project tuft forming yarns, a lay having reed dents, a nose board having spaced ingers between which the reed dents move, a set of guide plates in alignment with the dents of the reed, means to cause the tubes to be located between the guide plates, and means to vibrate the plates toward and from the reed to loosen any tuft yarns which may stick to the plates.

6. In an Axminster loom operating with a tube frame having tubes from which project tuft forming yarns, a lay having reed dents, a nose board having spaced ngers between which the reed dents move, a set of guide plates in alignment with the dents of the reed, means to cause the tubes to be located between-the guide plates, a cam to move the guide plates toward the vreed dents, and a series of points. on the cam to vibrate the plates toward and from the reed to loosen any tuft yarns which may stick to the plates.

'7. In an faxminster loom operating with a tube frame having tubes from which project tuft forming yarns, a reed having dents, a nose board having fingers separated by notches into which the dents move, a setf'of guide plates toY li'e between the tub`s,f`a"camf`ftoinovethe plates toward the' 'reed and alignment with tl'lederitS, saidcam eflect'iveqto"vibratethefplates back and forth to jar'lo'oseany tuft yar'nfwhich may be adhering thereto during'th'e'lrst part of they forward movementV of the reed, said plates thereafter effective to g'move forwardly with the reed and 'todenne vf h the ents guideaisles'inwhich'thetuft yarns mov@ ,.:f f i n i, f

' 243. "an -AXrninst'er vloom operating "witha tube framehaving" tubes fro'nrwhichproject tuft forming yarns, a reed having dents movable back and forth in the loom, a set of guide plates mounted forwardly of the reed, means to locate the tubes and yarns extending therefrom between the plates, means to vibrate the plates back and forth while the reed is spaced from said plates, and means to advance the plates in substantial contact with the dents, said plates and dents dening guide aisles for the tuft yarns as the reed moves forwardly.

9. In an Axminster loom operating with a tube frame having tubes from which project tuft forming yarns, a reed having dents movable backwardly and forwardly, a nose board having ngers separated by notches into which the dents move, a set of guide plates mounted in front of the reed, means to move a tube frame to cause the tubes to move from a substantially horizontal rearward projecting position to a substantially vertical position behind the nose board, means to thereafter move the guide plates rearwardly between the tubes to separate the yarns projecting from said tubes, means to vibrate said plates to loosen any yarns *adhering thereto, means effective thereafter to advance the reed so that the dents thereof are close to the plates to define with the latter guide aisles for the tuft yarns, and means effective thereafter to move the dents and plates forwardly together.

l0. In an Axminster loom operating with a tube frame having tubes from which project tuit forming yarns, a reed having dents movable forwardly and backwardly in the loom, a nose board having iingers separated by notches into which the dents move, a set of guide plates normally under the nose board and in front of the reed, means to operate the tube frame so that the tubes move from a rearwardly projecting position forwardly to a substantially vertical position behind the nose board, and means to thereafter move the guide plates rearwardly between the tubes to separate the tuft yarns and cause said plates to align with the reed dents in close proximity thereto to form guide aisles for the tuft yarns.

11. In an Axminster loom operating with a tube frame having tubes from which project tuft forming yarns, a reed having dents movable forwardly and backwardly in the loom, a nose board having fingers separated by notches into which the dents move, a set of guide plates under the nose board and in front of the reed, means to move the tube frame so as to` cause the yarn tubes to move from a rearwardly projecting position forwardly to a substantiallyy vertical position behind the iingers` of the nose board and to temporarily hold said yarn tubes in said posi-tion behind the nose board, means to project the guide plates rearwardly between the tubes toward the reed dents, means to thereafter raise the tube frame, and means subsequently operative to move the guide plates and reed dents forwardly in substantial alignment to define guide aisles for the tuft yarns.

12. In an Axminster loom, a tube frame memdents and between which the tuft yarns extend, l v

and means to move one set relatively to the other to loosen any yarns ywhich are improperly placed.

v14K. In. an Axmnster loom, a set of tuft yarn controlling elements from which extend tuft yarns, aset of guide elements,V means to move said sets into cooperative relation to cause the tuft yarns to enter between the guide elements, and means to vibrate one set relatively to the other to loosen kany tuft yarns which may be improperly placed.

EDWARD J. DACEY.

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