US1973357A - Axminster loom - Google Patents

Description

Sept. 11, 1934. w. w. ROBERTSON 3 AXMINSTER LOOM Original Filed 001;. 24. 1932 3 Shets-Sheet 2 Sept. 11, 1934. w w ROBERTSON 1,973,357

. AXMINSTER LOOM Original Filed Oct. 24. 1932 3 Sheets-Sheet $5 )fmv file I I fw v q/ I "'1 I y ,r' I z i: I 4 ll ,J/T/I/EM/WIP Patented Sept. 11, 1934 STATES FATE AXMINSTER LOOM Application October 24, 1932, Serial No. 639,257

Renewed February 9, 1934 3 Claims.

This invention relates to looms in which a pile or tufted fabric may be produced, with the pattern clearly appearing on the back of the fabric. Such a loom is shown and described in the prior -5 application of Dacey and Robertson, Serial No.

. '15 yarn guidance.

In the preferred form, the guide-plates are caused to directly abut the reed dents, and are held for a predetermined-period in yieldingengagement therewith.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appendedclaims.

A preferred form of the invention is shown in the drawings, in which Fig. 1 is a sectional side elevation showing parts of a loom embodying my improvements;

Fig. 2 is a sectional side elevation showing the spacer, reed dents and guide-plates on an enlarged scale;

Fig. 3 is a detail front elevation of certain parts, looking in the direction of the arrow 3 in Fig. 2;

Fig. 4 is a detail plan view, looking in the direction of the arrow 4 in Fig. 3;

Fig. 5 is an enlarged side elevation ofa portion of the actuating cam which moves the guideplates;

Fig. 6 is an edge view of the cam, looking in the direction of the arrow 6 in Fig. 5;

Fig. '7 is a detail sectional elevation, taken'along the line '7--7 in Fig. 5, and

Figs. 8 to 13 are diagrammatic views showing the operation of the parts in forming a yarn loop and tuft.

Referring particularly to Figs. 1 to 4, I have shown portions of a loom which is in general of a usual Axminster type and comprises a frame 20, a breast beam 21, and a lay 22 mounted on arms 23 secured to a cross shaft 24 and oscillated by a 50 cam (not shown) which acts through a cam lever 25.

A plurality of reed dents 26 are mounted on the lay 23 and are secured thereto in predetermined spaced relation by a lock plate 27 and a slotted 55 spacer bar 28. The usual yarn tubes T are transported by a pattern chain C and are removed from the chain and presented to the fabric B by the usual arms or levers 32 which are actuated in the manner customary in this type of Axniinster looms. so spaced that they will dip between adjacent reed dents 26 during the insertion of the yarn ends and the formation of the pile loops.

Front and rear pile-cutting knives 31 and 32 are mounted on knife-bars 33 and 34 and these parts are actuated at predetermined times in the usual manner to sever the tuft yarn ends after a row of yarn loops has been formed in the fabric. Binder warps W are drawn from warp beams or other usual sources of supply and pass between the reed dents 26 on the lay 22. i

A spacer or nose bar 40 is mounted in fixed position in the loom frame 26 and extends across the loom in front of the reed dents 26. Parallel teeth 41 extend rearward from the nose bar 40 into the spaces between the reed dents 26 and areprovided at their rear ends with inclined rear surfaces 42 and hook-shaped projections 43. As shown in Fig. 4, the spaces between adjacent teeth 41 are wide enough to receive the dents 26 and also to provide clearance for the binder warp threads W.

In addition to the reed dents 26 and teeth 41, there is also provided a movable cross bar 45 having a plurality of spaced parallel guide plates 46, aligned with the reed dents 26 and adapted to enter between the fixed teeth 41 as indicated in Figs. 3 and 4.

The cross bar 45 is mounted on supports 47 secured to the forwardly extending ends of arms 48, which arms in turn are mounted on a cross shaft 49 supported in fixed bearings in the loom frame 20. Consequently the cross bar 45 and guide plates 46 swing about the axis of the shaft 49 as a pivot.

Lifter rods 50 are connected at their upper ends tothe cross bar 45 and at their lower ends to arms 51 mounted on a supporting shaft 52 (Fig. 1) having a depending actuating arm 53. This actuating arm is connected by a link 54 and giveway device 55 to a stud 56 in the upper end of a lever 57.

A cam roll 58 on the lever 57 is engaged by an actuating cam 60 on the usual bottom or cam shaft 61 of the loom. The cam 60 ispreferably of special construction and comprises a circular disc having a cam plate 62 secured thereto at one point in its periphery. A contact member 63 (Figs. 5 to '7) is pivoted at 64 to the cam plate 62 and is engaged at its lower end (as viewed in Yarn tubes Y on the tube frames T are Fig. 5) by a stop screw 65 mounted in a projection 66 of the cam plate 62.

A spring 67 is seated in a pocket 68 (Fig. 7) of the cam plate 62 and yieldingly supports the upper end of the contact member 63, as indicated in Fig. 5. The upper end portion of the contact member 63 is closely adjacent to an abrupt shoulder 69 on the cam plate 62, and is in substantial alignment with the outer edge of the cam plate but may be yieldingly depressed as will be hereinafter described.

The outer edge surface '76 (Fig. 1) of the cam plate 62 is preferably substantially concentric with the shaft 6i but with a wavy or irregular outline, also for a purpose to be described.

Having described the details of my invention and its application to a loom of the type shown in the prior Dacey and Robertson application, the method of operation of the loom and improvements may be briefly described as follows, reference being made to Figs. 8 to 1 In Fig; 8 the parts are shown with the guideplates 46 in forward position and the reed dents 26 moved partially forward from the extreme rear position indicated in dotted lines, which rear position the dents 26 occupy during the insertion of the first filling pick F.

The reed dents 26 are moved further forward until the filling F substantially engages the inclined rear faces 42 of the fixed teeth ll. The binder warps W are then crossed to hold the filling F inthis forward position, and the reed dents 26 move rearwardly to the position shown in Fig. 9, while the yarn tubes Y simultaneously descend between the warps W and also between the guide plat s as, which guide plates have simultaneously begun their rearward movement.

This movement of the guide plates 46, combined with the rocking movement of the tube frame T and yarn tubes Y, causes the yarn ends E to be wiped between the guide plates 46, as indicated in broken and dotted lines in Fig. 9.

During this wiping in of the yarn ends E, the wavy outline of the portion '76 of the cam plate 62 causes the guide plates 46 to receive a vibrating or oscillating movement while in general rearward position, as indicated by full and broken lines in Fig. 9.-

The second piclr F of filling is then inserted as indicated Fig. 16 and the reed dents 26 move forward to beat up the second pick F As the reed dents 26 continue their forward movement, the adjacent edges of the reed dents 26 and guide plates 46 engage each other, as indicated in Fig. 11, thus forming substantially continuous aisles for the yarn ends Y, preparatory to the loopforming operation indicated in Fig. 12.

The reed dents 26 continue their forward movement to force the filling picks F and F up the inclined faces 42 and over the hooks 43, while at the same time the guide plates 46 move forward toward initial position.

The reed dents 26 again move rearwardly to permit insertion of the third filling pick F which is thereafter beaten up by the reed dents 26. The knives 31 and 32 are operated to sever the yarn ends which form the pile, and the tuft forming cycle is then complete.

For a more detailed and complete description of the loom operation, reference is made to the prior application above identified.

The advantages of my present improvement reside largely in the provision of the yielding contact member 63 on the cam plate 62, by which yielding member the guide plates 46 and reed dents 26 are held in firm but yielding contact when in the position indicated in Fig. 11. This insures a continuous aisle or passage between the parts 46 and 26, while at the same time avoiding the possibility of injury which might result if these parts were. both moved positively to abutting position. By the use of the yielding contact member 63, abutting contact of the parts 46 and 26 may be readily achieved and may be maintained for a desired time interval.

Furthermore, the provision of the giveway device 55 in the connections between the cam 60 and the cross bar 45 permits the actuating lever 5'7 to be entirely disconnected if any displacement of parts interferes with the usual operative movement of the guide plates 46.

My improvements thus permit the machine to be operated more safely and also render the .parts more efiective in guiding the yarn ends and in preventing lateral displacement thereof.

, The specific construction of the cam 66 and cam plate 62 and the method of operation thereof in oscillating the guide plates 66 is not claimed herein, as this feature is not of my invention and is described and claimed in a copending application of Edward J. Dacey, Serial No. 665,917, filed April 13, 1933.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:-

i. In an Axminster loom, a tube frame having a plurality of yarn tubes from which extend .yarn ends, a lay having a set of reed dents between which lie binder warps, a set of guide plates, each of which is aligned with an associated reed dent, means to move said reed dents,

and additional yielding means to move said guide plates, whereby said dents and plates are caused to relatively approach each other and to engage each other in yielding contact to define guide aisles for the yarn ends.

2. In an Axminster loom, a tube frame having a plurality of yarn tubes from which extend yarn ends, a lay having a set of re d dents between which lie binder warps, a set of guide plates, each of which is aligned with an associated reed dent, means to move said reed dents,

additional yielding means to move said guide plates, whereby said dents and plates are caused to relatively approach each other and to engage each other in yielding contact to define guide aisles for the yarn ends, said additional yielding means including a cam having a yielding contact member and a cam lever actuated thereby and connected to move said guide plates.

3. In an Axminster loom, a tube frame having a plurality of yarn tubes from which extend yarn ends, a lay having a set of reed dents between which lie binder warps, a set of guide plates, each of which is aligned with an associated reed dent, means to move said reed dents, additional means to move said guide-plates, whereby said dents and plates are caused to relatively approach each other and to engage each other to define guide aisles for the yarn ends, and a giveway connection between said additional means and said guide plates.

WILLIAM W. ROBERTSON.

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