US462878A

US462878A - Thomas kiddier

Info

Publication number: US462878A
Authority: US
Publication date: 1891-11-10
Anticipated expiration: 1908-11-10

Description

(No Model.)

'I'., J. & J. W. KIDDIER. TRAVERSE WARP KNITTING MACHINE.

No. 462,878. Patented Nov. 10,1891.

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UNITED STATES PATENT OFFICE.

THOMAS KIDDIER, JAMES KIDDIER, AND JOHN XVILLIAH KIDDIER, OF

NOTTINGHAM, ENGLAND.

TRAVERSE-WARP KNITTING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 462,878, dated November 10, 1891.

Application filed $eptember 30, 1890. Serial No. 366,630. (No model.)

To all whom, it may concern:

Be it known that we, THOMAS KIDDIER, JAMESKIDDIER, and JOHN WILLIAM KIDDIER, machinists, subjects of the Queen of Great Britain, all residing at Bell Street, Arkwright- Street, in the town and county of Nottingham, England, have invented certain new and useful Improvements in Traversearp Knitting- Maehines Used for Knitting \Varp Fabrics, of which the following is a specification.

Our invention relates to knitting-machines known as warp-knitting machines, more especially known as traverse warp machines. In this class of machines as heretofore constructed as each course is worked the warp-threads are first unwound from the bobbin sufficiently to allow the needles and other instruments to act upon them freely, and then the greater part of what has been unwound is wound up again to close the work and prevent the threads from falling slack. Heretofore this winding and unwinding has been constantly going on through a considerable range, and the necessity for allowing time for this to take place Without violence has materially limited the speed of the machine and the fabric produced has been hard and tighter than desirable. According to our invention we do not do away with this action entirely, as it is needful to give the proper tension to the work; but we desire yery greatly to limit this to-and-fro winding and unwinding of the bobbins. We cause the threads to pass from the bobbins on the several traverse-carriages beneath tension rollers or bars, which are of such weight as to be raised by the threads which pass beneath them. On the frames of the traverse-carriages we form arms or brackets which are provided with slots and act as supports for the tension rollers or bars, allowing them to be suddenly raised as the threads are drawn on the needles and then to remain temporarily suspended on the threads for the purpose of taking up the looseness of the threads. In this way the irregular impulses given to the threads are compensated by the tension roller or bar, instead of oceasioning sudden intermittentdrawing cit of the threads from the bobbins. This enables us to run the traverse-warp machine at a much greater speed than heretofore attained with the ease and smoothness of motion required, and at the same time enables us to produce a much slackenknitted warp fabric.

In order that our said invention may be fully understood and readily carried into effeet, We will proceed to describe the drawings hereunto annexed.

Figure l is an elevation, and Fig. 2 is a plan, of several of the traverse-carriages.

The traverse-carriages are all precisely similar the one to the other; but for greater clearness and to avoid repetition the details are not repeated in every case. Each traversecarriage consists of a base a, mounted on three caster-wheels Z) l) b, and it is jointed to the next carriage on either side at a a. The carriages thus constitute an endless chain, which while the machine'is at work travels round and round, always over the same course. On each base a there are standards a a and the bobbin X on which the threads are wound is carried in suitable bearings on the top of the standards. Arms ar a project horizontally from the standards, and at the ends of the arms are vertical slots which receive the axis of a tension device or roller 0. The tension device may be a bar which does not rotate, as indicated on the left side of Fig. 2; but a roller is preferred. The threads (1, as they are drawn from the bobbins X, pass beneath the tension-roller c and thence upward to the needles by which the fabric is produced. The weight of the roller 0 represents nearly the tension which it is desirable to apply to the threads. To prevent the bobbin from turning too freely it has a pulley e fixed to it. A cord f is lapped two or three times around this pulley, and its ends are attached to two weights 9 and 71 \Vhen the bobbin turns in consequence of the threads being drawn oil from it, the weight g is raised and the lighter weight his lowered until the latter comes against the they yield still further by being drawn cit:

- sion device or the weight.

the bobbin while the cord slips upon the pulley and without further rise either of the'ten- /V hen the pull on the threads is relaxed, a portion of the threads is wound back again upon the bobbin. It will be observed that each carriage carries a bobbin and that there is a tension roller or bar for each bobbin. All the threads on which each tension-roller bears are unwound from the same bobbin. Each carriage carrying a bobbin is provided with devices for causing a winding to and fro of the threads.

hat we claim is- 1. In a traverse-warp knitting-machine, the combination of a series of carriages, a bobbin and tension device on each carriage, and means for winding the threads to and fro on the bobbins.

2. The combination of a series of carriages connected together to form a chain, a bobbin mounted in each carriage, a series of tension,- rollers, one for each bobbin, and means for winding the threads to and fro on the bobbins, substantially as set forth.

3. In a traverse-warp knitting-.n achine, the

combination of a series of carriages connected together to form a chain and each adapted to carry a bobbin, a bobbin adapted to'have thread wound upon it on each carriage, a pulley on the axis of the bobbin, a cord wound upon the pulley, two weights, one heavier than the other, attached to the ends of the cord, and a tension device which bears on the threads unwound from the bobbin, the whole so arranged that when the threads are pulled they first yield while raising the tension device, then they further yield under a higher tension to close the work while raising the heavier weight g, and, finally, they yield still further by being drawn oi the bobbin while the cord slips upon the pulley and without further rise either of the tension device or the weight, and also the whole so arranged that when-the-pull on the threads is relaxed a portion of the threads is wound ack aga n upon {the bobb n- TI-IOMAS KIDDIE'R. JAMES KIDDIER. JOHN WILLIAM 'KIDDIER. Witnesses;

MARK H A. A. DICKINSON.