US2635645A

US2635645A - Loom harness

Info

Publication number: US2635645A
Application number: US268845A
Authority: US
Inventors: John J Kaufmann
Original assignee: Steel Heddle Manufacturing Co
Current assignee: Steel Heddle Manufacturing Co
Priority date: 1952-01-29
Filing date: 1952-01-29
Publication date: 1953-04-21
Anticipated expiration: 1970-04-21

Description

April 5 I. J. KAUFMANN 635,6

LOOM HARNESS Filed Jan. 29, 1952 2 SHEE T$SHEET 1 INVENTOR.

JOHN J. KAUFMANN ATTORNEY,

April 21, 1953 J. KALJFMANN LOOM HARNESS 2 SHEETS""SI-IEET 2 Filed Jan. 29', 1953 FIG. 5

INVENTOR. JOHN J. KAU FMANN ATTORNEY.

Patented Apr. 21, 1953 LOOM HARNESS John J. Kaufmann, Elkins Park, Pa., assignor to Steel Heddle Manufacturing Company, Philadelphia, Pa., a corporation of Pennsylvania Application January 29, 1952, Serial No. 268,845

8 Claims.

This invention relates to 100m harness and it relates more particularly to the construction and arrangement of the heddle frames in which the heddles are mounted for shedding the warp when the frames are raised and lowered in the loom.

One of the principal difficulties experienced in connection with the loom harness frames at present in common use is the tendency'of the heddles to bind upon their supporting bars and thus causing warp streaks and other defects in the cloth being woven. 1

Heretofore considerable thought and ingenuity has been expended in an attempt to support the heddle bars intermediate their ends in such manher that the heddles will be freely movable on the heddle bars notwithstanding the distortion which often takes place in the top and bottom rails of the heddle frames either because of the strains imposed thereon, or because of climatic changes which result in bending and'twisting of the wooden rails employed.

The principal object of the present invention is to provide improved means for supporting the heddle bars intermediate the ends whereby the heddle bars at the top and bottom may be maintained in the required parallelism, notwithstanding any temporary or permanent change in shape of the top and bottom rails of the frame, to the end that the heddles may at all times be free to move on the heddle bars and automatically adjust themselves to their proper positions during the weaving operation.

A further object of the invention is to provide a harness frame of the character aforesaid having novel means by which a certain amount of cushioning of the heddles, and the supporting parts, will occur when the heddle frames reach the upper and lower limits of their travel in the shedding of the warp.

A further object of the invention is to provide, in a heddle frame of the character aforesaid, improved means for adjusting the parallelism of the heddle supporting bars without dismantling the frames or removing them from the loom.

The nature and characteristic features of the present invention will be more readily understood from the following description, taken in connection with the accompanying drawings forming part hereof, in which:

Figure 1 is a side elevation of a loom harness frame embodying the main features of the present invention;

Fig. 2 is a fragmentary detail view illustrating, on an enlarged scale, the construction and arrangement of an adjusting device of a preferred form for use in the frame;

Fig. 3 is a transverse section thereof taken on the lin 3-3 of Fig. 2;

Fig. 4 is a transverse section, similarly enlarged, taken approximately on the line -4 of Fi 1;

I Fig. 5 is a plan view of a part of the inner edge portion of the bottom rail illustrating the arrangement thereon of certain of the parts employed in harness frames of the presentinvention; and V Fig, 6 is an exploded view, the parts being shown in perspective, of the device shown in Fig. 5 of the drawing which is used for flexibly mounting the slide hook rods employed as part of the harness frame shown in Fig. 1.

It should, of course, b understood that the description and drawings herein are illustrative merely, and that various modifications and changes may be made in the structure disclosed without departing from the spirit of the invention.

Referring to the drawings, in the particular embodiment of the invention therein shown, the heddle frame proper is of the conventional type comprising top and bottom rails l0, customarily made of wood, connected at their ends by vertical struts ll in which the ends of the heddle supporting bars [2 are mounted.

The heddles l3 are of the usual fiat steel type provided with central warp eyes IA. The heddle supporting bars l2 may be mounted in place by spring locking members l5 which may be of any of the preferred forms at present in common use, such for example as the locking members shown and described in my previous application for Letters Patent filed November 19, 1948, Serial No. 60,908.

The heddle supporting bars I2 are supported intermediate their ends by slide hooks E6 of any preferred construction such, for example, as are shown in my previous Letters Patent dated November 10, 1942, No. 2,301,628.

The slide hooks l6 are slidably mounted on auxiliary supporting rods ll, which'preferably extend from end to end of the frame.

At desired locations in the frame there are provided devices for resiliently supporting the auxiliary rods ll upon which the slide hooks l6 are mounted; Each of said devices comprises a strip of spring steel 20 the ends of which are bent at right angles to the main portion thereof to provide ears 2| which in turn have portions 22 bent to horizontal positions to provide enlarged fiat bearing surfaces for the rod Ill. The ears 2! are slotted as at 23 for the passage therethrough of the rods l1.

The central portion of the resilient strip 20 is slotted as at 24, this slot being preferably formed by first slitting the strip and then spreading the same to afford a better bearing on the inner edge of the rail 0, and also to permit the slot 24 to be of sufficient width for the passage therethrough of fastening screws 25' without unduly weakening the strip at this point.

The screws 25 also pass through the holes 26 in a reinforcing strip or plate 21 superposed over the central slotted portion of the spring strip 20.

There is also provided, at desired locations; and

preferably only in the top. rail, one. or more. of. the adjusting devices shownin detached-detailin Figs. 2 and 3 of the drawings. This deyiee comprises a screw member 3&- having a shank portion 3 I, cut in the form ofawoodscrew, which part is mounted in the rail ID. A portion .32 of the member 3| projects inwardly beyond the marginal edge of the rail, and this portion ofthe screw is threaded for the mounting thereon of a hand nut 33, and the end of said hand nut 33 has on its innermost face a diametral groove 36 adapted, when proper adjustment of the hand nut 33 is made, to provide a recess in which the auxiliary rod I], .upon which the slide hooks it are mounted, has its upper marginal edge portion seated.

In the use of the harness above described, whenever the shedding takes place, if the strain upon the rails is such as to tend to bend the same, which ordinarily would cause the heddle sup.- porting bars to be pulled. out of parallelism, this is eliminated by the, use of the device of, the present invention by reason of the resiliency of the members which support the slide hook rods, upon which are mounted the slide hooks which in turn support the heddle bars.

Additionally, whenever it is found that the frame has been distorted by reason of a permanent set in the rails, whether this change in shape is caused by the strains imposed upon the structure in use, or by reason of climatic changes which tend to bend or twist the rails and thereby destroy the parallelism of the heddle supporting bars, this can be readily corrected by a simple adjustment of the hand nut upon the projecting threaded portion of the screw which is mounted in the rail.

It will be found to be only necessary to adjust the hand nut a short distance by tur ing the same in the required direction, the adjustment being against the tension .of the adjacent arms of the resilient supporting device.

I claim:

1. In a heddle frame for looms comprising top and bottom rails, heddle bars upon which. the heddles are mounted, auxiliary supporting rods adjacent the heddle bars, and slidable members mounted on the auxiliary supporting rods for supporting the heddle bars intermediate their ends, resilient means for supporting the auxiliary supporting rods from the inner edges of the rails, and means mounted on at least one of the rails for imparting pressure against one of the auxiliary rods and thereby adjust the same with respect to the inner edge of the rail against the tension of the resilient supporting means.

2. In a heddle frame for looms comprising top and bottom rails, heddle bars upon which the heddles are mounted, auxiliary supporting rods adjacent the heddle bars, and slidable members mounted on the auxiliary supporting rods for supporting the heddle bars intermediate their ends, resilient means for supporting the auxiliary supporting rods from the inner edges of the rails.

3. In a heddle frame for looms comprising top and bottom rails, heddle bars upon which the heddles are mounted, auxiliary supporting rods adjacent the heddle bars, and slidable members mounted on the auxiliary supportingrods for supportin the heddle bars intermediate their ends, resilient means for supporting the auxiliary supporting rods from the inner edges of the rails, said supporting means comprising, at various locations, a strip of flexible material having means for engaging the auxiliary supporting rods.

4.;Inaheddle. frame for looms comprising top and. bottom rails, heddle bars upon which the heddles are mounted, auxiliary supporting rods adjacent the heddle bars, and slidable members mounted. on the auxiliary supporting rods for supporting the heddle bars intermediate their ends, resilient means for supporting the auxiliary supportingrods from the inner edges of the rails, said supporting means comprising, at various locations, a strip of flexible material having inwardly projecting ears provided with slots through which theauxiliarysupporting rods extend.

In a heddle frame for looms comprising top and bottom rails, heddle bars upon which the heddles are mounted, auxiliary supporting adjacent the heddle bars, and slidable members mounted on the auxiliary supporting rods for supporting the heddle bars intermediate their ends, resilient means for supporting the auxiliary supporting rods from the inner'edges of the rails, said supporting means comprising, at various locations, a strip of flexible material having inwardly projecting ears provided with slots through which the auxiliary supporting rods extend, the inner ends of the ears being bent to a horizontal position to provide enlarged bearing surfaces for said rods.

6. In a heddle frame forlooms comprising top and bottom rails, heddle bars upon which the heddles are mounted, auxiliary supporting rods adjacent the heddle bars, and slidable members mounted on the auxiliary supporting rods for supporting the heddle bars intermediate their ends, resilient means for supporting the auxiliary supporting rods from the inner'edges of the rails, and means carried by at least one of the rails for imparting pressure against one of the auxiliary rods, said means comprising a member a portion of which is secured to the rail and an inwardly projecting portion, and a part adjustably mounted on the inwardly projecting portion of said member and bearing against the auxiliary rod.

7. In a heddle frame for looms comprising top and bottom rails, heddle bars upon which the heddles are mounted, auxiliary supporting rods adjacent the heddle bars, and slidable members mounted on the vauxiliary supporting rods for supporting the heddle bars intermediate their ends, resilient means for supporting the auxiliary supporting rods from the inner edges of the rails, and means carried by .at least one of the rails for mparting pressure against one of t e iliary rods, said means comprising a member a portion of which is threaded into the rail and an inwardly projecting portion, a hand nut threaded on the inwardly projecting portion of said men her and bearing against the auxiliary rod.

8. In a heddle frame for looms comprising top and bottom rails, heddle bars upon which the heddles are mounted, auxiliary supp rtin r0615 adjacent the heddle bars, and slidable members mounted on the auxiliary supporting rods for supporting the heddle bars intermediate their ends, resilient means for supporting the auxiliary supporting rods from the inner edges of the rails, and means carried by at least one of the rails for imparting pressure against one of the auxiliary rods, said means comprising a member a portion of which is threaded into the rail and an inwardly projecting portion, a hand nut threaded on the inwardly projecting portion of said memher and bearing against the auxiliary rod, said nut having a diametral groove on its inner face in which the edge of the auxiliary rod is seated to lock the hand nut against undesired movement.

JOHN J. KAUFMANN.

References Cited in the file of this patent UNITED STATES PATENTS Number 10 Number