US1851805A - Loom for weaving axminster carpets and similar tufted fabrics - Google Patents

Description

March 29, 1932. c. c. B RINTON 1,851,805

LOOM FOR WEAVING AXMINSTER CARPETS AND SIMILAR TUFTED FABRICS Filed May 18, 1929 5 Sheets-Sheet l March 29, 1932, c. c. BRINTQN 1,851,805

LOOM FOR WEAVING AXMINSTER CARPETS AND SIMILAR TUFTED FABRICS Filed May 18., 1.929 5 Sheets-Sheet 2 FTTOR/YE) March 29,1932. 0. c. BRINTON LOOM FOR WEAVING AXMINSTER CARPETS AND SIMILAR TUFTED FABRICS Filed may 18. 1929 5 Sheets-Sheet s IILIIIIIIIII March 29, 1932.- c. c. BRINTON LOOM FOR WEAVING AXMLNSTER CARPETS AND SIMILAR TUFTED FABRICS Filed May 18. 1929 5 Sheets-Sheet 4 March 29, 1932. c c 'ro 1,851,805

LOOM FOR WEAVINGAXMINSTER CARPEIS AND SIMILAR TUFTED FABRICS Filed May 18, 1929 5 Sheets-Sheet 5 Patented Mar. 29, 1932 UNITED STATES PATENT mm CECIL CHARLES BRINTON, OF KIDDERMINS'IEB, ENGLAND Application filed May 18, 1929, Serial No. 364,179, and in Great BritainMay 22, 1928.

This invention has reference to looms'for weaving Axminster carpets and similar tufted or pile fabrics and comprises certain improvements as hereinafter described which may be utilized to obviate a disadvantage attending the weaving of single-colour fabrics in looms as ordinarily constructed where in the occurrence in the frame of a tuft-yarn or yarns Varying (throughout the whole or part of its or their length) in shade from the proper or selected colour, results in the production of a Streaky or unevenly coloured fabric; the streakiness resulting from the weaving into the fabric of a line or lines of tufts cut from the faultily-shaded yarn or yarns.

In an ordinary single-colour loom of the type known as the Brinton Axminster loom, streakiness arising from yarn-shade varia- 2G tions cannot be remedied duringweaving due to the fact that each tuft gripper of the loom always picks up its tufts of the pile-yarn from'the-same yarn-carrier, so that if the yarn proceeding from any particular carrier shows a diiferencein shade, or varies in shade in'a partor parts of its length, the production of a corresponding streak, or a line or lines of'incorrectly-shaded tufts, in the carpet is inevitable.

3o Further it is the common practice in singlecolour weaving in a Brinton type Jacquard loom, to run each of the yarns through a yarn-carrier which is suspended from the Jacquard mechanism, but to work the loom 5 with the jacquard out of action. These suspended carriers are, however, incapable of controlled lateral step-by-step displacement and to enable such displacement for the purposes of the present invention the loom is 40 provided with a unitary yarn-carrier comprising a series of side-by-side compartments, through eachof which a singleyarnis passed, and also with mechanism which during each loom cycle changes the lateral relationship of the yarn-carrier unit to the tuft-grippers,

or vice versa, so that each gripper is constrained or enabled over a'given series of cycles successively to pick yarn-tufts from a series of different yarns.

'50 Thus, in the event of any particular yarn being defectively shaded, the mechanism ensures a certain distribution of tufts cut from that yarn so that instead of the defective tufts being repeated in the same line and producing an obvious streak or fault, they are planted in the fell of the cloth in echelon, or in a diiferent tuft-line and also in a different tuft row, throughout a series of cycles, andbeing thus separated and distributed amongst a number of different rows of correctly-shaded tufts, the defective tufts are rendered practically unnoticeable.

An application of the invention to a tuftdistributing mechanism for a Brinton-type Axminster loom, in which the position of the 66 yarn-carrier block is changed laterally in re" lation t0 the grippers step-by-ste'p over a series of loom cycles, is shown by way of example in the accompanying drawings, in which 70 Figure l'is an elevation of a part of the loom showing the general lay-out of the tuft distributing mechanism. I

Figure 2 is another elevation but showingv the laterally-displaceable yarn-carrier in sec- 7 tion and illustrating the disposition of the said carrier in relation to the tuft-grippers.

Figure 3 is a side elevation, on a smaller scale than Figures 1 and 2, of a part of'the loom showing the arrangement adopted for actuating or controlling the displaceable yarn-carrier block.

Figure 4 is another elevation, viewed from the frontof the loom, showing the arrangement of the block-displacing and" return g5 mechanism in relation to the frame of the loom. I

Figure 5 shows a separate plan of the indexing cam-gear controlling the unitary yarn-carr1er. I

Figure 6 is a separate plan of the carrierblock return mechanism.

The same'letters of reference indicate corresponding parts in the several figures;

The tuft-forming and planting mechanism of the loom shown in the drawings is of the well-known ,Brinton Axminster type in which, during each cycle, a system of mechanically-controlled grippers a grip the ends of the yarn projecting from the compart- :ea

ments in the block 0, withdraw the yarn a certain distance and, after the withdrawn ends have been cut off into tufts, the grippers back away from the yarn carriage and plant their tufts in the fell of the cloth. On the tufts being locked in the fell, the grippers open to release the planted tufts and are taken back to the yarn carriers to commence a fresh cycle.

In the loom as shown, the grippers are mounted in an ordinary carriage; that is to say, in a carriage which has no lateral movement in the frame, but to enable tuft distribution in accordance with the present invention, the yarn-carrier consists of a block 0 having a series of side-by-side compartments through each of which a single yarn is passed from the yarn-carrier and the block is mounted so as to be capable of lateral or transverse movement relative to the frame and the gripper carriage, and cam and spring mechanism is embodied for shifting the carrier-block in a series of steps, in relation to the grippersystem (one step to each cycle) and periodically, or after completion of the predetermined number of cycles, returning the said unitary yarn carrier to the zero or starting position. The yarn carrier is provided with at least three more yarn compartments than there are grippers. V r

The loom illustrated embodies a four-step distributing cam (Z whose operations are so controlled that, considering any group of four adjacent yarn-carrier compartments in the block, the mechanism will, at the start of each cycle of the loom, shift'the carrierblock laterally to a distance equivalent to the pitching of the grippers and present each compartment of the carrier to a gripper next removed from the gripper that extracted a tuft from the said compartment in the preceding cycleh Thus, during four successive loom cycles, each yarn carrier compartment presents its yarn successively to four different grippers, enabling the echelon planting of tufts extracted and cut from that yarn in four different lines of the weave, whilst on completion of the prescribed series of four carrier-block displacements, the automatic return mechanism shifts the carrier-block suitably mounted in guides on the left-hand side of the loom with a four-step cam surface (Z (F, (Z (Z presented inwardly or towards the yarn-carrier block, enabling an extension 0 from the end of the said block to be maintained in contactwith the said cam surface by the action against the block of suitablyapplied loading springs or equivalent expedients (not shown in the drawings). The cam-member is connected to a mechanism, driven by suitable gearing, which drops or depresses the same by a series of steps or stages corresponding to the number of steps in the cam, and then (after the carrier-block has been positively shifted back to its starting point) restores the said member also to its zero or starting position. 7 The cam-surfaces (Z (Z (Z a are arranged successively in receding perpendicular planes and are pitched, as regards their lateral spacing, to correspond with the pitching of the yarn-carrier con'ipartments and grippers of the loom, and since each downward displacement of the said cam-member presents a different and stepped-back plane surface to the extension of the spring-loaded carrier-block, the mechanism enables the yarn carrier block to be spring-shifted laterally at each such step (towards the left of the loom) through a distance equivalent to the pitching of the grippers, and to be returned to its starting point on completion of the series of four step-displacements to enable the next tuft-distribution cycle to be started.

The depression and return motions of the tuft-distribution cam may be realized by coupling the same, by a rod or link f, to an overhead lever or rocking bar 9 which is itself controlled by a four-step cam 7t keyed to a vertical gear-driven shaft k mounted at the side ofthe loom, whilst to provide for the return of'the yarn-carrier block to zero and clear the way for the lifting of the distributing cam to its starting position, a. thrust-rod or slide 2' may be arranged horizontally in the 100111 with one end iii-contact or connection with the yarn-carrier block and-its other end coupled to a lever 1' arranged in the path of a suitably-driven return-camz' having asingle lift timed to displace the thrust-rod and yarncarrier block to the right, and against the block-loading springs, immediately the distribution cam member has completed its operative movement. The carrier-block returncam 2' may be driven off the same shaft h as the block-displacing cam it and may be mounted, on a carrier member i that is keyed to the said shafth the connection between the cam and its carrier being such as will permit of the cam being shifted angularly around the shaft to radially adjust its lift for timing the return-displacement of the yarncarrier block. relative to the return displacement of the tuft-distributing cam.

Having described my invention what I claim and desire to secure by Letters Patent 18 1. A loom of the kind referred to, comprising a unitary yarn-carrier, having a series of side-by-side compartments therein through each of which a single yarn is passed, a series of tuft grippers co-operating with said yarncarrier, and means for changing the lateral relationship of the yarn-carrier to the series of tuft grippers whereby each gripper, over a given series of loom cycles, successively picks yarn-tufts from a series of diflferent yarns.

2. A loom of the kind referred to, comprising a unitary yarn-carrier adapted to accommodate a plurality of yarns, a series of tuft grippers co-operating with said yarncarrier, a multiple stepped cam, means for moving said cam intermittently through a series of distances each equal to one step of the cam and means whereby said cam changes the lateral relationship between the yarncarrier and the tuft-grippers during each cycle of operations of the loom so that each gripper, over a series of loom cycles corresponding to the number of cam-steps, successively picks tufts from a. series of different yarns.

In witness whereof I afiiX my signature.

CECIL C. BRINTON.

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