US1863847A - Dobby finger for looms - Google Patents

Description

June 21, 1932. E. R. HOLMES 1,863,847

DOBBY FINGER FOR LOOMS Filed April 23, 1950 Z/ Vl/E/V TOR EL EFF/05E R H04 M55 A 77'DENE Y5 Patented June 21, 1932 P AT i are ELIE-RIDGE R. HOLMES, OF WORCESTER, MASSACHUSETTS, ASSKG-NOR 'IOCROMPTOH 8c KNOYVLES LOOM WORKS, OF W'ORCESTER, MASSACHUSETTfi, A. C'GEPOEATIQN OF MASSACHUSETTS DOBBY FENGER FOR LOOIJIS Application filed April 23,

This invention relates to improvements in (lobby fingers for looms and it is the general object of the invention to provide an improved finger usable on multiple weave dobbies. V

In the weaving of towels and handkerchiefs it is customary to employ a multiple weave dobby having two independent sets of dobby fingers which cooperate with two different pattern surfaces. A flexible connection is ordinarily introduced between the fingers of the upper auxiliary set and those of the lower primary group which directly control the harness lever hooks. As heretofore employed the cords have been broken or cut by sharp edges on the fingers and it is an important objectof my present invention to provide a. simple attachment for the finger having a smooth well rounded surface which will not fray or abrade the cord connections.

It is a more specific object of my present invention to provide a metallic ring which is held to a dobby finger, the wire of which the ring is made being of a diameter less than the thickness of the dobby finger so that said rings will be spaced from each other sufiiciently to permit knots in the cord to pass each other without objectionable contact.

lVith these and other objects in view which will appear as the description proceeds my invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims. 7

In the accompanying drawin wherein a :2 convenient embodiment of my invention is set forth,

Fig. 1 is a vertical section through a dobby having my invention applied thereto,

Fig. 2 is a detailed horizontal section taken on line 2-2 of Fig. 1,

Figs. 3, 4 and 5 are diagrammatic views showing the manner of forming my improved finger, and

Fig. 6 is an enlarged section on line 6-6 of Fig. 1 showing the relation bet-ween the ring and the finger.

Referring to Fig. 1, I have shown a dobby frame 10 having a cross rod 11 on which 1930." Serial N0. MiG/Z00.

is mounteda plurality of primary lower dobby fingers 12. The latter are prevented from undue upward movement by a wire.

duced guiding'wings 16 which project be'- tween the dents 17 of a fixed comb having a fi nger supporting-cross bar 18.

ii. the frame has pivoted thereon a plurality of auxiliary fingers 20 which co-act with a second or auxiliary pattern surface 21. There may be one auxiliary finger 20 for each primary finger 12, and each of the upper fingers 20 will be connected to a flexible cord 22 which may preferably be braided and treated to preventelongation under'varying atmospheric conditions.

The pattern surfaces 14: and 2l'will be in action alternately, one coming to rest as the other becomes active and the lower fingers will control lobby hooks which determine the order in which the harness frames not shown will be raised. The auxiliary fingers are not connected directly to the hooks but exert their control through the lower fingers. Thematter thus far described is old in the art as shown in patent to Selley No. 955,559.

In carrying my present invention into effect I provide improved means for attaching the lower ends of the cords 22 to the primary fingers 12. Each of the latter may have a shaft 19 secured in the upper part of shoulder 30 which is slotted as at 31, Fig. 4 V to define a pair of compressible lips 32 and 33, respectively. The slot may be of a depth indicated by the dotted line 3 1 in Fig; 1 and of a sufiicient width to receive a wire ring 35. The latter may be endless or a straight wire bent to circular form. In either instance the plane of the ring will be substantially parallel to the vertical sides of the corresponding finger 12. After the ring is inserted in the position shown in 1 the lips 32 and 33 will be pressed together as indicated in Fig. 5, thereby clinching the ring in place.

It is a desirable feature of my invention to form the ring of wire substantially less in diameter than the thicknessof the body 15 of the main finger'so that the knots at the lower ends of the cords 22 may pass each' other without interference. While I have shown a dobby finger as formed of a solid piece of metal yet there have'been proposed and used dobby fingers so constructed that the lips 82 and 33 can be formed of sheet metal.

FIOIIT the foregoing it will be seen that I have provided a simple form of dobby finger wherein a ring or similar contrivance is clamped or otherwise secured to the finger'to receive the lower end of a flexible cord. It

' will further be seen that the rings are so formed that when several fingers are assembled side by side there will be Sll'ifiClGIlt space bet-ween therings for the knots in the cords.

Furthermore, in forming the rings of Wire smooth rounded surfaces are'easily provided to prevent wearing of the cords.

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing from thespirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I'claim is:

1. In a dobby finger to cooperate with a cord, a pair of normally spaced lips secured to the finger, and a ring located between and held in a substantially fixed relation with respect to the finger by said lips and presenting a surfaceto cooperate with the cord.

2. In a dobby finger to cooperate with a cord, two lips which are pressed toward each other, and a ring held between and in fixed relation with respect to the finger by said lips and presenting a smooth attaching surface for-the cord. V

8. A dobby'finger to cooperate with a cord said finger having two parts thereof which arebentztowar'd each other, and a cord holder caught between said parts and'held rigid with respect to the'finger and presenting a smooth attaching surfaceforsaid cord. r

4. A dobby finger to cooperate with a cord, said finger formed, ofmaterial capable of bein-gbent and having two parts bent toward each other, and a cord retainer held between said partsand presenting a smooth attaching surface for the cord.

"In testimony whereof I have hereunto fixed my signature.

at ELBRIDGE 'R; HOLMES. '7

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