US1840892A - Loom - Google Patents

Description

1932. T.IJ. GARISIO 1,840,892

LOOM

Filed May 16, 1930 2 Shee ts-Sheet l T. J. GARISIO Jar 1. 12, 1932,

LOOM

Filed May 16, 1930 2 Sheets-Sheet 2 Patented Jan. 12, 193a?- I THEODORE GAB/1510,01 ALLEN'TOWN, PENNSYLVANIA LOOM Application filed. May 16, 1930. Serial No. 453,052.

My invention relates to looms for weaving silk fabrics, from sheer chiffon to heavy count crepe, and has for its object to avoid 6 the so-calied barre effect'in-these fabrics. the raw silk fabric, it is quite prominent after the goods have been dyed, and is the cause of rejection of large quantities of woven silk. 1

- By my invention this defect in the fabric is avoided, and it ccmprises'the reed mounting of these looms, by which the reed'is pivoted below its bottom andzis under spring tension. v A r 15 Silk looms having reeds pivoted at their top are now in general use, but such strum tures do not prevent barre.

Referring to the drawings 111Wl'll0l1 like "of the shaft parts are similarly designatedy V Figure 1 is a front elevation of my im proved structure.

Fig. 2 is a side elevation thereof.

Fig. 3 shows a modified arrangement-using a leaf spring instead of a coil spring.

25 Fig. 4 shows a still further modification, I

using a compression coil spring.

Fig. 5 shows a further arrangement, using a shortened lever.

ferring to Figures 1 and 2, I have shown 30 only so much of the usual silk loom as is necessary to an understanding of my invention, and in which are the swords, 11 the bolt to which the crank rod for swinging the swords to and fro is connected, 12 the sword The reed structure including the upper and lower reed rails 16 and 17 respectively, is strengthened by angle irons 18 to prevent warping; each upper and lower reed rail contains a grooved reed cap 19, and in the grooves of these caps the upper and lower edges of the reed 20 are seated.

i The upper ends of the swords have an While this defect is notso'noticeable in 3 eye to which the sword is bolted or made in opening 21 batten, and the warp.

through them; 22 is the usual 31 is the glass friction rod for be attached to 7 present silk looms or'may be built into the loom.

The swords are drilled with alined holes at the recesses 21 below the reed 20, and I utilize the present recessesfcr securing the ends of a stationary shaft23 in the drilled holes by p through the resting in the bottom of the recesses 21. The g screw in one direction to assing a screw; 24 diagonally ends of the shaft with their ends recess is inclined in an opposite that. in the other recess to hold the shaft from rotating. Any other means for fixing the shaft may bejused, or in lieu but I prefer I may use stub shafts or bolts, w it) a continuous shaft, as shown.

On this shaft I mount at each of its ends a lever 25 on antifriction bearings, preferably roller bearings 25 so that'the two levers 25' are carried by the swords 10 and pivot on the shaft. The proximately sions 26 and from these upper end of each lever is apfork-shaped, by reason of exten- 27 perpendicular to the plane of the reed, and the reed rails 16 and 17 extend two extensions parallel to the reed, as at 28 and '29, Figs. 1 and 2.

Each lower extension 29 has adjacent its lever a hook 30 for holding the usual glass friction rod 31 for the warp. Each ofthese extensions, 28 and 29 hasvertical slots. 32 through which pass the bolts 33, that secure the reed rails 16 and 17 ontothem and by which the r ails can be vertically moved to adjust the height of the reed 20. Below the pivot shaft strikes against the bent end of stop pin 35,

23 the lever has an lug 34: that whose" shank passes through the sword and is held by a nut 36. By-this lug and pin the forward limit of the'reed with respect to the swords and the fabric can be adjusted.

Each lever has'a forwardly and downwardly inclined arm 37 betweenits pivot point and the-lower end, which arm'is provided with notches or serrations 38, Fig. 2,

on its upper Adj ustabl edge. a V e-to any one of the notches 38 is a link 39 in which is hooked the upper end of a coil spring 40. The lower end of the spring 40 hooks into an eye 41 at the upper end of a rod 42 whose lower end is threaded and passes through a trunnion block 43 and is held therein by nut 44. The trunnions 45 of this block engage in a hook shaped casting 46 secured to the side, front or back of the sword.

The operation is as follows:

As the swords come forward to beat up the pick the reed will be stopped against the pick, while the swords continue to move forward a short distance to the end of their stroke, and the reed remains against the pick for a short time, and also for a short time at the beginning of the rearward stroke, during which the new shed of the warp is beginning to be made.

The resistance of the reed can be regulated by shifting the link 39 along the downwardly inclined arm 37 within limits to increase or decrease the tension of spring 40 during weaving.

An initial or major adjustment of the ten sion of the spring can be made by increasing or decreasing the effective length of the spring by nuts 44. l

The stop at 34, 35 is a positive limit for the forward position of the reed with respect to the swords.

It is, of course, known that natural ray silk fiber is not of uniform diameter, and with the smaller denier filling threads for sheer fabrics this may play an important role in producing the barre eiiect.

It may be that when the reed is pivoted at the top it depresses the lower shed slightly at the pick and the warp has a very little more tension as the reed holds the pick for a. moment as the shed begins to change, and the pick is gripped by the shed at a point slightly below the proper fabric level and is forced outof place at the beginning of the shedding operation.

However, no one knows the cause of the defect, but whatever the cause, my invention remedies barre, and with it I weave perfect fabrics without any trouble whatever.

hile the structure shown in Figs. 1 and 2 is the preferred form of my invention, other structures are useful to the same end.

In Fig. 3 I have shown the lower end of the lever 48 having fastened to it a leaf spring 49. The lower end of this spring seats loosely between lugs 50, or it may be in a pocket projecting from the side of the sword 10.

In Fig. 4 I have shown the lever 51 having a rearwardly projecting arm 52 having a bolt 53 on which is mounted an eye 54 on the upper end of a rod 55 whose lower end slides loosely through an eye 56 on the sword. The lower end of the rod 55 is threaded and provided with a nut 57 On the rod 55 is a spring 57 under compression between the eye 56 on the sword and a collar 58 adjustably held on the rod 55 by aset screw 59.

In Fig. 5 I have shown the simplest form, in which the lever 60 is a one-armed lever, instead of having two arms, as in the previous figures. In this case the pivot shaft 23 has a collar 61 held to the shaft by a set screw 62. The upper end of a spring 63 rests loosely against the upper end of the lever 60, and its lower end is coiled to surround the pivot shaft- 23, and its extremity enters a hole in collar 61.

By loosening the collar and turning it on the shaft and then clamping the collar to the shaft by the set screw, the tension of the spring can be changed. The upper ends of levers 48, 52 and 60 are the same as lever 25.

I claim- In a loom, the combination with the swords and reed structure; of a stationary shaft carried by tle swords below the reed structure, a lever for each swore pivoted on the shaft, said reed structure mounted on its ends between the upper ends of the levers, a downwardly inclined notched arm extending from each lever from a point below its pivot, a link adjustable along said arm, ,a spring whose upper end engages the link, a pivot block mounted on the sword, and means to adjustably connect the lower end of the spring to said block.

In testimony that I claim the foregoing as my invention, I have signed my name hereto.

THEODORE J. GARISIO.

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