US595677A - Stephen a - Google Patents

Description

(No Model.) 7

S. A. LEAVENS, J. M. HARVEY & W. A. CHANDLER. LOOM FUR LAPPET WEAVING.

No. 595-, 67 7. Patented Dec. 14,1897.

UNITED STATES Enron.

PATENT STEPHEN A. LEAVENS, JAMES M. HARVEY, AND WALTER A. CHANDLER, OF GRAFTON, MASSACHUSETTS; SAID CHANDLER ASSIGNOR TO AUSTIN G.

KEMPTON, OF SAME PLACE.

LOOM FOR LAP PET-WEAVING.

SPECIFICATION forming part of Letters Patent No. 595,677, dated December 14, 1897.

Application filed September 14, 1896. Serial No. 605,759- (No model.)

To all whom it may concern:

Be it known that we, STEPHEN A. LEAVENS, JAMES M. HARVEY, and WALTER A. CHAND- LER, of the town of Grafton, in the county of Worcester, in the State of Massachusetts,have invented a certain new and useful Improvement in Oscillating Mechanism for Needle- Bars in Looms for Lappet-Weaving; and we declare the following to be a specification thereof, reference being had to the accompanying drawings.

Like numerals indicate like parts.

Figure 1 is an end elevation of our invention with so much of a loom as is necessary for its proper illustration. Fig. 2 is a front elevation of the same. Fig. 3 is a front elevation of the double needle-bar. Fig. 4 is a view in elevation of one of the needles and a cross-section of the needle-bar and clamps for holding the needle in position. Fig. 5 is a cross-section of the needle-bars as seen on line a: m of Fig. 3. Fig. 6'is a perspective view of a detachable crank constituting a part of our invention. Fig. 7 is a perspective view of a detachable dog used in said device. Fig. 8 is an elevation of a cam adapted to actuate our improved mechanism. Fig. 9 is an end elevation of said cam.

Our invention is a mechanism adapted for use upon looms for the purpose of lappetweaving, which is a kind of weaving in which fancy patterns are stitched into the fabric to give the appearance of embroidery.

It consists of a combination in a loom of a creel containing any desired number of spools of yarn or thread and an oscillating needlebar properlysupported and provided with needles and mechanism adapted and arranged to communicate motion from a shaft of the loom to oscillate said needle-bar, as hereinafter particularly described.

In the drawings, 1 1 represent the frame of a loom. The breast-beam is shown at 2, the lay-swords at 3, the lay at 3,the shuttle-boxes at 4, the shuttle-race at 5, the warp-beam at 6, the whip-roll at 7,. the lease-rods at 8, the crank-shaft at 9, the pulley at 10, the driving belt at 11, the crank-arm or link at 12, the

cloth-beam at 13, the picker-sticks at 14, and

thearch at 15, all of the common construction and operated in the well-known manner. On the shaft 16 is mounted a cam 17. The shaft 16 derives motion from the crank-shaft 9, which has a gear 18 to engage the gear 19 on the shaft 16. The cam 17 is made in two sections or halves, as seen in-Fig. 8, each being provided with flanges 20 and held together by screws 21, passing through said flanges. A set-screw 22, passing through one section of the split hub, as seen in Fig. 8, secures the cam 17 upon the shaft 16.

A centrally-located lever 23 is fulcrumed at 24 to a bracket 25, which extends from the rear portion of the loom-frame. At its for ward end said lever .23 is longitudinally slotted, as seen in Fig. 1. The lever 23 has a centrally-located upward projection 26, at the end of which is mounted a friction roll or wheel 27. A link bar or rod 28 is mounted by a stud 29in the slot of the lever 23.

A rock-shaft 30 is mounted in bearings 31, (of which one only is shown in Fig. 2-,) extending from the lay-swords, and on said shaft is a dog 32, which is fastened thereon by a setscrew 33, which passes through a hub 34 of said dog. The dog 32 has its arm longitudinally slotted, as best seen in Fig. 7. The link bar or rod 28 is mounted bya stud in its upper end on said dog 32,passing through said slot.

- At each end of the rock-shaft 30 is a crank 35, (see Fig. 6,) having a pin 36 and a hub 37, through which passes a set-screw 38, by which said crank is secured in place upon the shaft 30.

A link-bar 39, by means of a hub at its lower end, is mounted on the pin 36 of the crank 35 and is pivotally connected to an arm 40 of a needle-bar, which bar is pivotally hung on journals at the top'of the lay-swords, as indicated by dotted lines in Fig. 1 at 41 and as shown in solid lines at 4:2 in Fig. 2. Each link-bar 39 passes between the branches of a fork 43, Fig. 1, by which it is confined to a vertical plane when in operation.

The needle-bar may be single or double. We prefer to have it double, as illustrated in Fig. 3, where it is seen that the needle-bar 4A has an offset i5 and a tubular sleeve 46. The companion needle-bar 4:7 extends through the sleeve 46, and by means of a screw 48 the two are fastened so as to move together.

Each needle-bar, as shown in cross-section in Fig. i, has beveled edges longitudinally. On the top and bottom of said bar are clamppieces 49, one for each needle, having beveled faces also, adapted to lie in contact with the beveled edges of the needle-bar, and each clamping-piece 49 has a hole or perforation for the passage of the needle through it. The needle 50 has an eye near the point, and a .portion of its shank is screw-threaded, as

shown in Fig. l. Two nuts 51 are provided, which are engageable with the needle on the screw-threads thereof. The needle passes through said nuts 51 and clamping-pieces 49, and by screwing up the nuts the clamps 4.9 are brought into forcible contact 011 their beveled sides against the beveled edges of the needle-bar, thus holding the needle firmly in position. In this man 11er,too, as will be readily seen, the needle is adjustable upon the needle-bar, and the length at which it projects therefrom can be regulated. Of course the edges of the needle-bar and the faces of the clamps need not be made beveled, but this form is preferred.

The creel-board is shown at 52, held upon the top of the arch by suitable clamping devices, and 53 designates the spools from which the lappet threads 54 pass to the needles, respectively.

Having thus specified the parts of said invention, we will now explain its operation.

The warps 55 pass, as usual, from the warpbeam 6 over the whip-roll 7 and the lease-rods 8 through the harness and reeds and when filled in with the woofs from the shuttle in the weaving form the woven fabric or cloth, which, passing over the breast-beams 2 is wound upon the cloth-beam 13. The lay 3 is moved back and forth by the crank-arm 12 of the crank-shaft 9, which is turned by the pulley 10 and the belt 11. All this is as usual. The rotation of the shaft 16 carries around the cam 17, which by striking upon the roller 27 of the projection 26 of the lever 23 causes said lever 23 to move downward. The downward movement of the lever 23 draws down the link-bar 28, and said link-bar, engaged by a stud in the slot of the dog 32, which is fastened by the setscrew 33 upon the shaft 30, causes said shaft to rock. The cranks 35 rock with the shaft 30 and give a reciprocating movement to the links or rods 39. The links 39, being pivotally connected with the arms of the needle-bar, oscillate said bar, which is journaled at its ends, as before described. Thus by every revolution of the shaft 16 the needle-bar and its needles therein are oscillated once, the oscillation in one direction being caused by the wiping motion of the cam 17 against the roller 27 and in the other direction by the action of a spring (not shown) which returns the lever 23 upward when it has reached the limit of its depression caused by the cam, said spring serving to move the end of the lever 23 up and so by the rod connection described to pull down the links 28 39 and the needle-bar at the end of the links 39. The needles thus oscillate with the needle-bars, and their threaded points describe an arc motion, thus enabling them to swing in between the warps, respectively. The lappet-threads 54: thus are carried by the needle-points to a position within the shed, so that when the shuttle crosses from side to side upon the race it carries the filling-thread in front of said lappet-threads.

The mechanism by which the endwise or longitudinal movements of the needle-bar and its needles form a pattern in the cloth as it is woven is not here shown, being the subject-matter of another application for Letters Patent filed by us herewith, Serial No. 605,760, the present application being confined to the oscillating motion of the needlebar and the mechanism by which it is caused.

By dividing the cam 17 longitudinally into half-sections we are able to place it upon the shaft 16, which is one of the usual shafts of a loom, without removing said shaft from its bearings. When the two sections have been placed on the shaft in proper positions, they are secured together by the screws 21 and are fastened to the shaft 16 by the set-screw 22.

The longitudinal slot in the lever 23 and the longitudinal slot in the dog 32 allow of the adjustment of the links 28 and 39 and so enable us to regulate the extent of the oscillation of the needle-barand the needles thereon.

It has been usual heretofore in devices of this class to give the needles a direct linear travel or downward thrust between the warps. The disadvantage of such a movement of the needles is that the needles so thrust forcibly downward are liable to strike against the warps and sometimes break the warps or some of them or to weaken or split them if not to break them. By our swinging movement of the needles they cannot break or injure the warps, but simply crowd their way in between the warps and separate them.

\Ve claim as a novel and useful invention and desire to secure by Letters Patent- 1. In a lappet-loom, the combination with a needle-bar having beveled edges, clamp-pieces having beveled faces adapted to lie in contact with said bar edges, a needle passing through holes in said clamp-pieces, and means for holding said clamp-pieces in forcible contact with said bar, substantially as described.

2. In a lappet-loom, the combination with a needle-bar having beveled edges, clam p-pieces having beveled faces adapted to lie in contact with said bar edges, a needle having a screwthreaded shank passing loosely through holes in said clamp-pieces and two nuts engageable with said needle and adapted to force said clamp-pieces into contact with said bar edges, substantially as set forth.

'3. In a lappet-loom, the combination of a substantially as specified.

4. In a lappet-loom, the combination of two parallel needle-bars, one of which is pivotally mounted at its ends in journals so as 'to be capable of a rocking motion, and the other is mounted and supported thereon and connected and movable therewith, substantially as described.

STEPHEN A. LEAVENS. JAMES M. HARVEY. WALTER A. CHANDLER.

Witnesses:

A. G. KEMPTON, WM. H. WHITMAN.

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