US793025A - Heddle mechanism for looms. - Google Patents

Description

No'. 793,025Y PATBNTD JUNE 20. 1905. A. WEIMAR.

HEDDLB MECHANISM POR LOOMS.

APPLICATION FILED 00T.1,19o1.

... 3 SHEETS-SHEET l.

No. 793,025. PATENTED JUNE 20, 1905. A. WEIMAR.

HEDDLB MECHANISM FOR LOOMS.

APPLICATION FILED 00T.1,1901.

3 SHEBTS-SHBBT 2.

if Eni Ane( No. 793,025. PATENTED JUNE 20, 1905.

A. WBIMAR.

HEDDLE MBGHANISM FOR LOOMS.

APPLICATION FILED OOT.1,19`01.

3 SHEETS-SHEET 3.

NITED STATES Patented June 20, 1905.

PATENT QFFTCE- ANDREr IVEIMAR, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO IVILLIAM D. IVEII'IAR, OF llllLA'DELPHIA,

PENNSYLVANIA.

HEDDLE NIECHANISIVI FOR LOOIVIS.

SPECIFICATION forming part of Letters Patent No. 793,025, dated June 20, 1905.

Application filed October l, 1901. Serial No. 77,239.

To 11,7/y 10ft/1m it 11mg/ (fm1/cern.:

Be it known that I, ANDREW IVEIMAR, `a citizen of the United States, resid ing' in Philadelphia, Pennsylvania, have invented certain Improvements in Heddle Mechanism for Looms, of which the following' is a specification.

illy invention consists of a substitute for the cams and trcadles sometimes used at the lower portion of a loom for operating the heddles thereof, the object of my invention being' to increase the patterning' capacity of such hedlle-operatingh mechanism, to provide for readily changing' from one pattern to another, and to so locate the mechanism that it will be overhead and out of the way of the weaver, but more readily accessible than cams at the bottom of the loom.

In the accompanying drawings, Figure l is afront elevation of sufficient of a loom to illustrate my invention. Fig. 2 is a front View of the same looking' in the direction of the arrow a', Fig. l. Fig. 3 is a plan View with the connections between the levers omitted in order to avoid confusion. Fig. i is a side elevation illustrating the spring connections for the lower ends of the heddles. Fig. 5 is a side view of part of the pattern-chain on a larger scale than the other figures, and Figs. (i, 7, 8, 9, and l0 are views of the different links comprising the chain.

In Fig. l of the drawings, l represents part of the fixed frame of the loom, and 2 the top arches of the same, these arches carry ing bearings for transverse shafts 3, upon which are hung` bell-crank levers 4, which are disposed in connected pairs or series and carry, by links and straps or other suitable connections 5, the heddles 6, these heddles beingsubjected to a constant downward pull by the action of springs T, carried by frames 9, secured to the lioor and acting upon levers IO, which are connected by straps ll or equivalent devices to the lower portions of heddles, as shown in Fig. I.

rIhe upper portion of the loom-frame l has brackets 12, carrying a transverse shaft 13, onto which is slipped the slotted hubs of a sen ries of levers la and 2,7, said hubs being retained in position upon the rod or shaft 13 by means of a retaining-bar I5, mounted on the brackets l2 and bearing upon the outer portions of the hubs of the levers, as shown in Fig. I. On withdrawing this bar, therefore, any one of the levers can be readily removed. The inwardly-projecting arm of each lever 14 carries an anti friction-roller 16, which bears upon a pattern-chain 17, mounted upon adrum 12), which is secured to and rotates with a shaft 20, the latter turning in suitable bearings on the frame l of the loom and having' at one end a spur-wheel 21, which meshes with a spurwheel 22 on a shaft L3, also mounted in suitable bearings on the lixed frame, said spurwheel Q2 being secured to or forming part of a bevel-wheel 24C, which meshes with a bevelpinion 25 at the upper end of a vertical shaft 26, the latter being rotated either continuously or by a series of intermittent movement-s from any available d riving-shaft of the loom.

There are as many of the pattern-chains 17 as there are levers I4 employed in the loom, and each pattern-chain is composed of low links and high links, said high links being either single, as shown at the lower portion of the chain in Fig. l, or grouped and overlapping', as shown at the left-hand side of said chain, depending upon whether the projecting arm of the lever i4 is to be held in au elevated position for one or more links ofthe chain, the disposition of the links of course depending upon the character of the pattern to be produced.

The upwardly-projecting arm of each lever II is notched for the reception of a loop-andstrap or equivalent connection Q7 between said level-14 and one of the levers 4, and each arm of cach lever I4 is guided in a suitable grid, that Vfor guiding the upper arms of the levers being represented at 29 and that for guiding the inwardly-projecting arms of the levers being' shown at 3() in Fig. l. The upper grid Z9 has a transverse shaft 31, upon which are hung a series of fingers 32, which can be thrown backward, as shown in Fig. I, or can be swung forwardly, so as to engage with notches 33 at the upper ends of the upwardly-projecting arms of the levers 14 in order to hold the latter out of action when desired.

By the mechanism described the movement of the heddles iseffected by the action of the pattern-chain itself, the device in this respect being distinct from that class of heddle mechanisms in which the pattern-chain simply operates upon a jack so as to move the same into or out of engagement with a separate heddle-operating-mechanism. The use of the pattern-chain permits of a much greater variety of patterns than could be produced if the heddles were acted upon by cams on a cam-shaft, and patterns can be readily changed by rearranging the links of the chains.

Upon a shaft carried by brackets 34 at the end of the loom I mount a drum 35, over which the pattern-chain can be looped when said chain is of considerable length. thereby preventing said chain from hanging down so far as to interfere with the operation of any other part of the loom.

I find it advisable to provide the loom with means, in addition to those above described,for operating a series of heddles-say four-for producing a plain weave, so that the chain-operated heddles may be used simply fo r the production of fancy weaves. For this reason I mount upon the front end of the shaft 2O a series of cams 36, which have alternating high and low portions, these cams actingupon the series of levers 37; but these levers 37, instead of being connected directly to the levers 4, are connected by link-and-strap or other connections 43 to arms 39 on rockshafts 40, mounted in bearings in brackets 41, said rock-shafts 40 having other arms 42, which are connected to the levers 4 by linkand-strap or other connections 44. When only a plain weave is desired, therefore, all of the levers 14 will be put out of action and the heddles operated solely by the cams 36. In the present instance I have shown the arms 42 as supplanting certain levers 14; but it will be evident that the entire series of levers 14 may be used, and the arms 42 may be arranged laterally outside of the limits of said levers 14.

The special forms of links used in making my improved pattern-chain are shown in Figs. 5 to 10. Each of the links has a tongue at its forward end for fitting a recess in the rear end of the preceding link and a recess at the rear end for receiving the tongue of the following link, the links being connected by transverse pins in the usual manner.' The low link is shown at Fig. 6, the single liftlink at Fig. 7, and the group-links at Figs. 8, 9, and 10. The single lift-link has a rise 50, a dwell 51, and a drop 52, the rise and drop each extending throughout about one-half as many degrees of an arc as the dwell. The

foremost of the group-links, Fig. 8, has a rise 53 and a dwell 54, which is extended in the form of a rearwardly-projecting tail 55, the recess of the link extending up through this tail portion of the same. The intermediate grouplink, Fig. 9, has a dwell 56, with forwardlyprojecting nose 57 for entering the recessed tail portion of a preceding link, and said intermediate link also has a rearwardly-projecting and recessed tail 59, similar to that of the foremost link. The rearmost group-link, Fig. 10, has a dwell 6 0, with forwardly-projecting nose 61 for entering the recess of the preceding link, and has a rear drop 62. By inserting between the foremost and the rearmost group-links more or less of the intermediate group-links a dwell of any desired duration in one position of the heddle can be effected, and any desired length of dwell in the other positionvof the heddle may be effected by the use in succession of more or less of the low links. Each of the high links has upon its high portion a side lug 63, which by contact with a laterally-adjoining link will serve to prevent lateral tilting of either link, and thus preserve the entire series of links in proper lateral position and prevent any strain upon either link due to lateral pressure thereupon.

Having thus described my invention, I claim and desire to secure by Letters Patent- 1. The combination, in a loom, of a series of heddles, a series of levers connected thereto, a series of pattern-chains acting directly upon said levers, a series of cam-disks on the pattern-chain shaft, laterally separated from said pattern-chains, a series of levers acted upon by said cam-disks, and connections between said cam-actuated levers and certain of the heddles which are in diiferent planes from those of the levers, substantially as specified.

2. The combination, in a loom, of a series of heddles, levers connected thereto, a series of pattern-chains acting directly upon said levers, a series of cam-disks on the patternchain shaft, a series of levers acted on by said disks, and connections between said levers and certain of the heddles, elements of said connections being rock-shafts, each having two IOO arms, one connected to the lever and the other laterally separated from the first and having connection with the heddle, substantially as specified.

3. rI`he combination, in a loom, of a series of heddles, a series of levers connected thereto and having notches at their outer ends, pattern-chains acting upon said levers, and swinging fingers, one for eachlever, said fingers being adapted to engage with the notched portions of the levers to hold them out of operative position, substantially as specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ANDREWT VEIMAR.

Witnesses:

F. E. BEoH'roLD, VVALTEP. CHIsu.

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