US151974A - Improvement in narrow-ware looms - Google Patents

Description

f 3SheetS--S"heet1. T. W. HARRISON.

Narrow-Ware Looms.

No. 151,9 74. Pate-nted1une16,18.74.

Shets-S`hat3- T. W. HARRISON.

Narrow-Ware Looms. No.l5l,974. v k Patentedunemnsm,

. plates, secured to a support, C.

UNIT) STATES PATENT CFFICE.

THOMAS NV. HARRISON, OF EAST BOSTON, MASSACHUSETTS.

IMPROVEMENT IN NARROW-WARE LOOMS.

Specification forming part of Letters Patent No. 151,974, dated June 16, 1874; application filed March 13, 1874.

To all lwhom it may concern:

Be it known that I, TnoMAs W. HARuisoN, of East Boston, in the county of Suli'olk and State of Massachusetts, have invented certain new and useful Improvements in Looms for Weaving Narrow Fabrics, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings making part of this specification, in which- Figure lis a plan of a portion of my improved loom for weaving narrow fabrics, one only of the shuttles and the mechanism connected therewith being shown. Fig. 2 is a side elevation of the same. Fig. 3 is a vertical section on the line x a: of Fig. 1. Fig. 4 is a horizontal section on the line y y of Fig. 2. Fig. 5 is a vertical section on the line .e .z of Fig. l. Fig. 6 is a perspective view of the shuttle inverted.

My invention relates to looms for weaving narrow fabrics, in which a series of shuttles are employed, one for each str-ip or piece of fabric being woven. In this class of looms the mechanism, if complicated, produces much friction, thus preventing the loom from being run at a high speed. To overcome this difliculty is the object of my invention, which consists in certain details, which are hereinafter fully described and claimed.

To enable others skilled in the art to understand and use my invention, I will proceed to describe the manner in which I have carried it ont.

In the said drawings, A A represent two At the rear end of each plate is formed a T-shaped rail, D, which serves as a guide for the shuttle E, which is traversed backward and forward thereon, the shuttle being provided with a rectangular opening, a, extending entirelyr through it, for the reception of the upper dat portionof the rail, and a long slit, l), for the passage of the lower or vertical portion thereof. This T-shaped guideis particularly adapted for the purpose to which it is applied, as it occupies very little vertical space within the shuttle, and at the same time holds it steadily in its proper position, and prevents any liability of its tipping to one side. On the top of the shuttle is formed a recess, S, for the reception of the bobbin. (Not shown.) Between the plates A A is a space, c, for the passage of the lay or hatten G, which is pivoted at its lower end at (Z to the bed H, and is vibrated at the required times by a connecting-rod, e, and lever f, operated by a camwheel, I, on. a short shaft, g, having its bearings in standards K. The reeds (not shown) are intended to be placed within the space h at the upper end of the lay, the warpthreads extending over the space c, and being raised and depressed by the ordinary harness in a well-known manner.

I will now describe the mechanism by which the shuttle with its thread is thrown or tra-versed upon the guide-rails D D across the space c and through the shed.

To the under side of each plate A are secured two hangers, t' fi, which serve to support two plates, 7c 7s, which form guides or ways for the slides or carriers l m, which move thereon, the edges of the plates L fitting into grooves upon opposite sides of the carriers, as seen in Figs. 2 and 5, by which means they are kept in place. The construct-ion. ot' these carriers and the parts connected therewith, and the mechanism by which they are operated being exactly alike, but one will be described. L is a vertical shaft, having its bearings at n n, and carrying at its upper end a bell-crank, p, which is slotted for the passage of a screw or pin, 9, projecting from the under side of the carrier, and to the shaft L is secured another crank, q, which is connected with a lever, I0, by a rod, r, the lever 10 being operated by a cam-wheel, M, on the shaft g, and thus, as the cam-wheel is revolved, the carrier is reciprocated on the plates k. From one end of the carrier rises a hollow post, 12, in which lits a pin, s, which passes entirely through the carrier, and is provided at its lower end with a head, 13, its upper end being rounded ott', as seen in Figs. 2 and 5. t is a spring, one end of which is secured to the carrier, the opposite end being bent at right angles, and passing through slits I4 in the post l2 and a hole in the pin s, and extending out under the plate A, which is provided with an incline, 15, against which the projecting end of the spring t strikes as the carrier is brought up to the space c, and the pin s is thus depressed against the resistance of the spring for a purpose to be presently explained. The shuttle is provided on its under side with two recesses, 16 17, for the reception ofthe upper ends ofthe pins s, and the parts being in the position seen in Fig. 3, (with the pin s of the carrier m forced up by by its spring tinto the recess 17 in the shuttle) the carrier is moved in the direction of the arrow 18 toward the space c, taking with it the shuttle until the pin s is depressed, and its end withdrawn therefrom by the end of the spring t striking the incline 15. Just previous to this the other carrier, l, commences to move away from the incline 15 adjacent thereto, when its pin s will be forced up into the recess 16 in the shuttle, which is at that. time in a position to receive it, the pin s of Vthe carrier m having been withdrawn from the recess 17 before the pin s ofthe carrier lis forced up into the recess 16. The shuttle is then moved by the carrier l entirely across the space c, and through the shed. The lay is now moved forward to beat up the lling, and then drawn back out of the space c, when the shuttle is moved in the opposite direction by the carrier l until its pin is withdrawn by the incline 15, when the pin of the carrier m is forced up into the recess 17, and, as the latter carrier m continues its movement, the shuttle is again drawn thereby across the space c and through the. shed to the position from which it started. The lay is now thrown forward and back, and the operation continues as before, the shuttle being thus projected back and forth on its ways by the carriers l m, which alternately seize and release it, as above described; and by the employn'lent of this mechanism, which is exceedingly simple, and produces very little friction, I am enabled to run the loom at a very high speed, and, consequently, produce a large amount of fabric in a given time.

I do not limit myself to the use of the spring t and incline 15 for operating` the pin s, as other mechanism may be employed for this purpose. For instance, a pin or projection on the pin s may project into a lon gitudinal groove of such form as to give the required movements to the pin as the carrier is reciprocated.

In practice twenty of the abme-described looms will be arranged side by side in a single frame, the shaft g of each 011e being entirely independent, and being driven by a belt, or otherwise, from the main driving-shaft, a suitable shipper, or other device, being employed, by which each shaft g can be connected with or disconnected therefrom; by which construction any one of the shuttles can be stopped on the breaking of a thread, or when a bobbin is run out, without arresting the motion of the other shuttles.

By employing, in the manner described, an independent lay for each shuttle I am enabled to make it exceedingly light, so that it can be moved at a high rate of speed, whereas a single heavy lay, extending along the entire length of the loom, can only be vibrated slowly, on account of its great weight; and, it will be seen, that the lay G only requires to be of sufficient width to accommodate the reeds, for the reason that the shuttle runs upon stationary ways separate and independent of the lay, instead of upon guides thereon; and by this construction the weight of the lay is still further reduced, it being of great importance to have the moving parts as light as possible, in order to facilitate the running of the loom at a high rate of speed.

Any suitable stop mechanism may be employed in connection with each shuttle, which will cause the shaft g to be disconnected from the main shaft on the breakage'of a thread, all ofthe other shuttles of the loom being kept in motion, resulting in a great saving of time, and an increased production of the fabric being woven.

l am aware that heretofore looms for weaving narrow fabrics have been made with a series of shuttles, each one being operated by an independent mechanism, which may be connected or disconnected with the power. Therefore I do not claim this; but

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

In combination with alternative shuttle-carriers l l, provided with means for engaging and disen gagin g the shuttle and running upon the race 7c, each traversing half of the length of the race, the slotted lever p, and lever q, on the rock-shaft L, rods r r, and cam-grooved wheels M, all arranged and operating together to give the shuttle a positive motion, as set forth.

Witness my hand this 6th day of March, A. D. 1874.

THOMAS W. HARRISON.

In presence of- ',P. E. Taser-immensa, N. XV. STEARNS.

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