US2709457A

US2709457A - Beat-up for axminster loom

Info

Publication number: US2709457A
Application number: US333748A
Authority: US
Inventors: Schofield Fred Brown; Sutcliffe Arthur
Original assignee: TMM Research Ltd
Current assignee: TMM Research Ltd
Priority date: 1952-01-30
Filing date: 1953-01-28
Publication date: 1955-05-31
Anticipated expiration: 1972-05-31
Also published as: GB707934A

Description

May 3l, 1955 F. B. scHoFlELD ErAL BEAT-UP FOR AXMINSTER Loom 6 Sheets-Sheet l Filed Jan. 28. 1953 May 3l, 1955 F. B. scHoFlr-:LD ETAL BEAT-UP FOR AmINsTER LooM 6 Sheets-Sheet 2 Filed Jan. 28, 1953 May 31, 1955 F. B. scHoFu-:LD ETAL I 2,709,457

BEAT-UP FOR AmINsTER Loom Filed Jan. 2a, 1955 e sheeis-sheet 3 M3331, 1955 F. B. ls-::lloF|El D Erm. 2,709,457

BEAT-UP FOR AXMINSTER LooM Filed Jan. 28, 1953 6 Sheets-Sheet 4 May 31, 1955 F. B. scHoFlELD UAL 2,709,457

l BEAT-UP FOR AmlNsTER LooM Filed aan. 28. 1953 6 Sheets-Sheet 5 May 3l, 1955 F. B. scHoFlELD Erm. 2,709,457

BEAT-UP FOR AXMINSTER LOOM Filed Jan. 28, 1953 6 Sheets-Sheet 6 United States Patent O 2,709,457 BEAT-UP FOR AXMINSTER LOOM Fred Brown Schofield, Royton, and Arthur Sutcliffe, Oldham, England, assignors to T. M. M. (Research) Limited, Rossendale, England Application January 28, 1953, Serial No. 333,748

Claims priority, application Great Britain January 30, 1952 t 6 Claims. (Cl. 139-21) This invention relates to the beating-up of the weft in looms for weaving pile fabrics, such for example as spool Axminster carpet looms, of the type in which the whole of the wefts required for binding a row of tufts are inserted simultaneously by one insertion and withdrawal of needles or the equivalent, and are then divided into two groups, one of which is beaten up before the tufts are inserted and the other of which is beaten up after the tufts have been inserted.

In a known loom of this type, the first group of wefts is beaten up by an auxiliary beat-up reed which is raised through the warp yarns forming the shed, then moved to perform the beat-up operation and afterwards lowered clear of the shed and a main beat-up reed thereafter moves forward to beat up the second group of wefts. This type of beat-up motion has the disadvantages that the necessarily large number of moving parts leads to a.

congestion of mechanism under the front of the loom, making the adjustment of the various motions a difficult task, and that it is impossible to exert a strong beat-up action on the first group of wefts as required for the production of high grade fabrics with a large number of tufts per inch.

The object of the present invention is to simplify the beat-up mechanism, to ensure a strong beat-up for all groups of weft threads, and to facilitate access to, and adjustment of, the beat-up motion.

In a loom of said type, according to the present invention, all of the beat-up operations associated with each insertion of weft are performed by a single beat-up reed, means being provided for displacing one group of wefts clear of the beat-up reed during its first beat-up operation and thereafter restoring them into the path of said reed so that they will be beaten-up at a second beat-up operation of the reed.

One form of loom in accordance with the invention is hereinafter described in detail by way of example, with reference to the accompanying diagrammatic drawings. In said drawings, Fig. 1 is a partly sectional side elevation of the lower part of the loom, Fig. 2 is a partly sectional front view thereof, Figs. 3 and 4 are detail views illustrating the weft-lifting mechanism in the positions occupied respectively before and after the first beat-up operation, Fig. 5 is a detail view illustrating the means employed to actuate the weft-lifting member, Fig. 6 is a fragmentary view in elevation of the selvedge mechanism and the dividing-finger operating mechanism, and Figs. 7 to 11 are diagrams showing the respective stages which compose a working cycle of the loom.

The loom illustrated in the drawings is of more or less conventional type, a double shot of weft being inserted by the needles at a single operation and both wefts being bound at the selvedge by a twin shuttle selvedge mechanism operated once during each working cycle consisting of the successive steps of inserting upper and lower wefts y at a single operation, binding the selvedge, dividing the upper wefts, beating-up part of the upper weft and the lower weft, inserting and severing the pile tufts, beatingup the remaining part of the upper weft and changing the shed preparatory to the next cycle.

It will be seen from Fig. l that the loom comprises a frame Ztl, supporting the moving parts of the mechanism hereinafter described, and incorporating means (not shown) for the suspension of the healds 21, 22, a fixed reed 23 and a cloth-plate 24. The upper and lower chain warps, and the horizontal stuffer warps which compose the double shed are indicated at A, B and C, respectively. Two weft-carrying

needles

25 and 26 are actuated simultaneously by means (not shown) to insert weft threads respectively into the bottom shed BCl and the upper shed AC. The lower needle 25 carries a single weft thread D which is looped to form two strands extending through the lower shed and the upper needle 26 carries two threads E which are looped to form four strands extending through the upper shed.

A twin-shuttle selvedge cord mechanism, shown in Fig. 6, is employed to engage and retain in known manner, the upper and lower weft loops at the side of the loom remote from the weft-inserting

needles

25, 26. Such mechanism incorporates a shuttle-carrier 27 which is mounted for oscillatory movement upon a bracket 28, said carrier 27 being coupled by a link 29 to an arm 30 which bears a cam-follower 31 and which is actuated after each insertion of weft by the action of a cam 32 fixed on the continuously revolving shaft 33. A tension spring 34 anchoring the arm 30 to the frame 20, maintains the cam-follower 3l in contact with the cam 32.

At this stage the warp and weft threads occupy the positions shown in Fig. 7. Before the withdrawal of the

needles

25, 26, a dividing finger 35 (Fig. 6) is actuated to divide the weft E inserted by the needle 26 so that the part E1 thereof is depressed so as to be groupedwith the lower weft D and the remainder E2 raised to an elevated position for the purpose hereinafter described. Said finger 35 is carried by a slidable horizontal bar 36 which is operated at the appropriate instant by a double

armed lever

37, 38, the part 37 of which engages between vtwo

abutments

39, 40 on said bar 36, whilst the other part 38 carries a cam follower 41 which cooperates with a cam 42 mounted on the constantly rotating shaft 43. Said

lever

37, 38 is fulcrumed at 44 upon a fixed bracket 45. After the operation of dividing the wefts has been performed, the

needles

25, 26 are withdrawn to the position shown in Fig. 3.

In order to complete the grouping of the wefts, initiated by the dividing finger 35, the upper threads E2 at the needle insertion side of the loom are now raised to a high position in the upper shed throughout their length as shown, by the lifting finger 46 which is mounted for vertical sliding movement in the frame 20. Whilst the motion of said finger 46 may be performed mechanically,

it is preferably operated by the solenoid 47 (Fig. 5)

which is energised by a switch 4S in the circuit of which the leads are indicated at 49, said switch 48 being controlled intermittently by a cam Sti mounted on the shaft 43. A spring 51 which, when the finger 46 is raised, is compressed between a collar 52 on said finger and a fixed part of the frame 20, is effective to return the finger 46 to the lowered or inoperative position (shown in Fig. 4) when the switch 48 is broken.

The beat-up reed 53, the dents of which are open at their upper ends, is carried by arms 54 which are pivotally mounted on a shaft 55 located beneath the fell of the cloth. Also fixed to said shaft 5S is an arm 56 which is coupled by an adjustable link 57 to a lever 58 which is pivoted on the frame at 59. Said lever 58 bears a camfollower 60 which operates in the track 61 of a cam 62, which latter is fixed to a wheel 63 mounted on the constantly rotating shaft 33. In order that the angular position of the cam 62 on the wheel 63 may be adjusted to Patented May 31, i955 vary the timing of the beat-up operations, the cam is xed to the wheel by means of setscrews 64 which are received in circumferential slots 65 in the wheel.

After the lifting nger 46 has been raised to lift the strands E2, the beat-up reed 53 is rocked on the shaft S5 so as to beat up all the weft strands lying in its path of movement, i. e. the lower group comprising the strands D in the bottom shed and the two strands El in the top shed which have not been raised by the dividing 'linger 35 and the lifting nger 46. The strands E? which have been raised by said iingers 35 and d5 are above this path of movement, and are not beaten up during the said first movement of the reed 53 (Fig. 8). As said reed 53 returns to its backward position, the tuft yarns F are inserted in the usual manner (Fig. 9), the lifting finger 46 is lowered and the dividing iinger 3S is withdrawn to lower the two weft strands E2 into the path of the reed S3, so that on the next forward movement of the latter (Fig. l0), said strands E2 are beaten up to the fell of the cloth behind the tuft yarns F. The tuft yarns F are turned up by the member 66 and severed by the knife 6." in known manner, and after reversal of the shed (Fig. ll) the cycle of operations is repeated.

Since the top of the beat-up reed 53 lies below the top shed line during at least some part of the path of its movement, the Xed guide reed 23 serves to maintain the correct spacing of the warp threads irrespective of their positions in the shed.

If desired, the apparatus may include placer fingers 68, which are moved forward at opopsite sides of the shed during the tirst beat-up operation and which then remain at the fell of the cloth to hold the lower group D and E1 of weft in position when the reed 53 falls back, before executing the second beat-up operative after the weft E2 has been lowered. Said placer fingers 63 are carried by arms 69 pivoted at '7G and actuated by levers 71 which bear earn-followers 72 in operative relationship with cams 73 on the shaft 43.

What we claim as our invention and desire to secure by Letters Patent is:

l. A loom of the type referred to, comprising a single beat-up reed for performing all of the beat-up operations associated with each insertion of weft, and means for displacing one group of wefts clear of said beat-up reed Cil during its rst beat-up operation and thereafter restoring them into the path of said reed so that they will be beaten up at a second beat-up operation of said reed.

2. A loorn of the type referred to, comprising a xed reed to maintain spacing of the warps, a single beat-up reed, means for dividing the wefts into two distinct groups of which only one lies in the path of the beat-up reed, means for actuating said beat-up reed to execute a first beating-up operation before insertion of the tufts, means for retracting said beat-up reed, means for restoring the divided wefts not beaten up at said first operation into the path of said beat-up reed, and means for actuating the beat-up reed to execute a second beating-up operation after insertion of the tufts.

3. A loom according to claim 2 comprising, in conjunction with selvedge mechanism at the side of the loom remote from the weft-insertion side, means for dividing the weft into two groups, of which one includes weft inserted in the bottom shed and other weft inserted in the upper shed, and of which the other group is composed of weft inserted in the upper shed, and means for lifting said second weft group at the weft-insertion side out of the path of the beat-up reed prior to the irst beating-up operation and for lowering said second weft group after the iirst beating-up operation.

4. A loom as claimed in claim 2, comprising means for retaining the weft group beaten-up at the rst beat-up operation during the insertion of the tufts and until the second beat-up operation of the second weft group.

5. A loom as claimed in claim 3 comprising, in conjunction with means for dividing the weft into two groups at the side of the loom remote from the weft-insertion side, a lifting finger mounted for vertical slidable movement and located so that when raised it will lift the weft of the upper group out of the path of the beat-up reed.

6. A loorn as claimed in claim 5, comprising electromagnetic means energised at each working cycle to raise the lifting finger and to maintain the same raised during the first beat-up operation.

Head Feb. 2l, 1899 Southwell et al Aug. l5, 1899