US647854A - Loom for weaving narrow fabrics. - Google Patents

Description

Patenfed Apr. [7, I900. n. J. MAcDDNALD.

LOOM FOR WEAVING NARROW FABRICS.

nnm H mm m H mm PU mm m. M 3m (Application filed June 91, 1898.)

PATENT OFFICE.

DAVID JOHNSTON MACDONALD, OF DUNDEE, SCOTLAND.

LOOM FOR WEAVllflG NARROW FABRICS.

SPECIFICATION forming part of Letters Patent No. 647,854, dated April 17, 1900.

' Application filed June 21,1898. Serial. No. 684,051. (No model.)

To 11% whom it may concern.-

Be it known that I, DAVID JOHNSTON MAG- DONALD, a subject of the Queen of Great December 1, 1897,) of which the following is a specification.

My said invention relates to looms "of the kind in Whichseveral separate sets of warps each suitable for the width of narrow fabric to bewoven are arranged with intervalsbetween them and bent weft-fingers on a reciprocating bar introduce loops of weftinto the sheds formed in the ordinary or any suitable known way in the warps. Y'

My invention consists in combining with other parts'of such looms certain contrivances which make them better adapted for weaving narrow fabrics and which are here. inafter described with the aid of a sheet of explanatory drawings. 7

Figure 1 is a partial side elevation, Fig. 2 a partial front elevation, and Fig. 3, a plan, of parts of a loom sufficient to show my improvements. Fig. 4 is a side elevation of details drawn to a larger scale.

In carrying out my invention the loom for weaving a number of narrow fabrics is provided with ordinary or known shedding mechanism, with warp delivery, and take up mechanism, such well-known parts being omitted in the drawings to avoid complexity. Separate sets of warps A, each suitable for the width of narrow fabric to be woven, are arranged with intervals between-them. Bent weft-fingers B, fixed at regular intervals on a reciprocating bar B, carried by the lathe O in guides D D introduce loops of weft E into the sheds formed in the ordinary way in the warps A. To avoid confusion in the drawings, only one set of warps A, one weftfinger B, one weft E, and other parts repeated for each of the separate fabrics are indicated. The reciprocating bar B receives its motion by a pin 13*, acted on by a cam F, carried by the lathe O and driven by a grooved shaft 0, which slides through its center as the lathe moves and is connected by a universal joint 0 to gearing O on the crank shaft G of the loom. The weft E, drawn from any suitable source of supply at the back of the loom, is passed through a tension device E, thence through a fixed guideeye E at the lower end of a fixed bracket E and then up to and through a movable guideeye F on a pin which can rise and fall in a slot in the bracket E 011 the pin carrying themovable guide-eye F there is a small roller F which is acted on by the outer end of a bent rod G, attached tothe lathe C.

The outer end of this rod G is so shaped that on the movement of the lathe the movable guide-eye israised or lowered, as hereinafter described. able guide-eye F downagain to a second fixed guide-eye E on the lower end of the bracket E and thence to a guide-eye at the end of the weft-finger B.

A cam G keyed on thecrank-shaft G, acts through a connecting-rod H on a lever H,- keyed on a rocking shaftH which has fast on it (for each fabric) a rocking arm H con nected to a 'bar J, sliding in guides in brackets J J The arm H is curved, its lower rail and having at its back end a short slot, into which projects a pin on the bar J. The bar J carries a pointed shuttle J lying parallel to'the warps in a holder fixed to the bar and formed with fingers partly embracing The weft E passes from the movpart returning backward under the lathethe shuttle without preventing the weft-loop from passing over it.

A bent wire K is fixed on the outer end of a rod M, movable in guides N P on the bar J, the rod being formed with a collar Q, between which collar and the guide N a spring R is placed. An upwardly-projecting part S is formed on the wire K, and on the beat up the lathe G acts on this part of the wire and moves the wire out, compressing the spring R, which on the return of the lathe takes the wire back.

When the bent weft-finger B hasjust passed the weft-loop E through the warp-shed A, the position of the shuttle is forward of the loopthat is, nearer the operator-and then the motion of the lathe forward toward the operator, combined with the backward motion of the bar J, causes the shuttle to pass through the loop in the direction in which the shuttlepoint faces. By the movement of the reciprocating bar B the beat-up action of the lathe,

ill he motion transmitted bythe' 5 the weft-100p E to pass over the pointed shuttle J ,and after the weft-finger has returned sufliciently to clear the shuttle J then the shu-ttlepasses backward rapid 1y throu gh the weft-lo0p andvcarries its thread through the [0 loop. The weft-loop E passes ofl the shuttle J 3 and falls on the bent front end of the wire K, which assists in tightening'the weft, so as to form a good selvage at the other side of the fabric, the loop afterward passing off thewire beat-up of the lathe. The-vweft-l-oop E when I released from thewire K falls on the shuttle-f I thread L, to which a suitable tension -is.ap-

v plied in the'shuttle 3 When beat up bythe zo action of the rodJG on the rolle1*-F;,;attached to the movablegnide-eye F. The shhttle= threa'dL thus niade to pass through lthe wefti.

then

tially as described. K, which is carried forward bythe continued 1ath e,,the.weft-loopE is drawn; tight by the loop E forms 'a selvage with it. Thelathe Cr rocate, a shuttle-operating mechanism for the shuttle, and-a movable rod carrying a bent wire to take the loop of weft-thread from the shuttle, substantially as and for-the purpose described.

2; In a loom for Weaving narrow fabrics, the combination with Warp-shedding mechanism and with areed and lathe'and operatin g devices for the latter, of a horizontal weftbar' carried by the lathe, a cam on the lathe to reciprocate said bar, a grooved shaft on which the cam can slide, drivingnieans and a universal jointfor'said shaft, all substan- 3; 'In a=loorn for Weaving narrow fabrics, the combination with warp-shedding mechbar carried by the lathe,- with means to make 'saidbar reciprocate,'a shu'ttleand means for reciprocating it parallel with the warps and a bent'wire K adapted'to'take theloop of weftthjread'fromithe shuttle,,substantiallyas de- 1i; ln testim ony' whereof I have signed m y a ne tothis specification in the presence of o sii-bs'cribing witnesses; l: z

)tV-IDQ-JOHNSTQN MAoDdNAhD.

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