US2619990A - Pile wire for stationary wire wilton looms - Google Patents

Description

Dec. 2, 1952 R. R. CADY 2,619,990

FILE WIRE FOR STATIONARY WIRE WILTON LOOMS Filed Sept. 12, 1949 Patented Dec. 2, 1952 PILE WIRE FOR STATIONARY WIRE WILTON LOOMS Raymond R. Cady, Auburn, N. Y., assignor to Nye-Wait Company, Inc., Auburn, N. Y., a corporation of New York Application September 12, 1949, Serial No. 115,285

2 Claims. 1

The present invention relates to pile fabric looms of the type known as stationary wire looms for weaving rugs, carpets and the like. A typical loom of this type is more particularly illustrated and described in Patent No. 2,414,064, dated January 7, 1947, said loom being provided with stationary pile wires over which the pile loops are formed during the weaving of the fabric.

It is the primary object of the present invention to provide an improved pile wire for use in such looms, said improved pile wire being characterized by a curved pile yarn guiding section located between and extending from the upper end of the usual vertical leg at the rear end of the wire, to the pile loop-forming and height-determining section of the wire located towards the front end of the wire, just behind the successive loop-releasing, loop-cutting, and butt sections of the wire which are disposed in this order from back to front of the wire.

It is the purpose and advantage of the curved wire section aforesaid to insure rapid, smooth and uniform flow of the pile yarns down the wire to the loop-height-determining section, while at the same time, alfording greater clearance for the shuttles which are intermittently shot transversely across the loom beneath the pile wires to bind the warps and the pile or surface yarns together in the usual manner of the well-known Wilton weave produced by these looms.

I have found that the most effective and satisfactory curvature for the pile yarn guiding section of my improved pile wire is attained by forming the curve in a vertical plane on a radius which is approximately twice the over-all horizontal length of the pile wire less the length of the butt section, with the center of the curve located below the bottom of the horizontal portion of the wire at a distance approximately equal to nine-tenths of said radius and approximately two-thirds of said radius to the rear of the extreme front end of the wire. The bottom edge of the horizontal portion of the wire is disposed above the extreme lower end of the vertical leg at the rear of the Wire by a distance equal to approximately one-sixth of said radius.

Other and further objects and advantages of the invention will be hereinafter described and the novel features thereof defined in the ap pended claims.

In the drawing:

Figure 1 is a view in side elevation of a pile wire constructed in accordance with the present invention; and

FigureZ is a top plan view of the pile wire.

Like reference characters designate corresponding parts in the figures of the drawing, wherein the pile wire is shown to have the same general form as that disclosed in the prior patent above referred to. Thus, I denotes the vertical leg of the pile wire at the rear end of the wire, from the upper end of which extends forwardly and downwardly a pile yarn guiding section 2. The curve of the section 2 progressively increases in steepness from back to front of the wire, and at the front end of the curved section 2, this section merges into a pile loop section 3, which determines the height of the pile loops as they are drawn tight about the pile wire during the beating up of the fabric as it is woven in the loom. From the section 3, the wire continues forwardly in the form of a tension-releasing section 4 which is of somewhat less height than the height of the loop section 3, the section 4 further continuing and being coextensive with a knife-supporting section 5, which in turn is joined at its forward end to a butt section 6.

Except for the curved pile yarn guiding section 2, the details of theother wire sections are not material to the present invention, excepting in their general relationship as hereinafter described.

During the weaving operation, the pile yarns are alternately shifted first to one side and then to the other side of each of the pile wires which are held stationary and extend longitudinally of the loom, with the pile yarns diagonally passing across the upper edges of the curved sections 2 of the wires. The pile yarns are then guided down the sections 2 of the wires and are tightly drawn up and beat up on the loop-height-determining sections 3. As the pile loops move forwardly on the wires, the tension of the loops is released on the section 4, before they reach the knives 1 which are mounted on the knife carrying sections 5.

In order to insure rapid, smooth and uniform flow of the pile yarns forwardly and downwardly along the guiding sections 2 of the pile wires, I have found that it is necessary to curve these sections on a predetermined curve which is: more r l ss critical. The best results are obtained when this curvature conforms to the following formulae and relationship to the various portions of the wire:

wherein R is the radius of the curvature of the guiding section 2 of the wire about the center C; L is the over-all horizontal length of the pile wire less the length of the butt section 6; H is the vertical height from the center C to the lower edge of the horizontal portion of the pile wire; L" is the horizontal distance from the center C to the extreme front end of the wire; and H is the vertical distance from the extreme lower end of the vertical leg I to the bottom edge of the horizontal portion of the wire, as more particularly shown in Figure 1 of the drawing.

While the specific details have been herein shown and described, the invention is not confined thereto as changes and alterations may be made without departing from the spirit thereof as defined in the appended claims.

I claim:

1. A pile wire for use in longitudinal stationary wire Wilton looms, comprising a flexible, relatively thin and flat wire member, including butt, knife-supporting, pile-releasing, and pile-heightforming sections horizontally disposed successively from front to rear of the wire, a vertical leg section spaced substantially to the rear of the horizontally disposed, sections aforesaid and joined thereto by a progressively forwardly and downwardly curved pile yarn guiding section, said pile wire guiding section being curved on a predetermined radius having a length equal approximately to twice the horizontal distance between the extreme rear end of the pile wire and the rear end of the butt section, with the center of the curve located below the bottom of the horizontal portion of the wire at a distance of approximately nine-tenths of said radius and to the rear of the extreme front end of the wire at a. distance of approximately two-thirds of said radius.

2. A pile wire of the class describedQconforming to the approximate dimensions R=2L';

the radius of the curvature of the pile yarn guiding section, L is the over-all horizontal length less the length of the butt section, H is the vertical distance from the radius center to the lower edge of the horizontal portion, L" is the horizontal distance from said radius center to the extreme forward end, and H is the vertical distance from the extreme lower end of the vertical leg to the bottom edge of the horizontal portion of the pile wire, respectively.

RAYMOND R CADY.

REFERENCES, CITED The following references are of record inthe file of this patent:

UNITED STATES PATENTS Number Name Date 813,968 Heald Feb.27, 1906 900,136 Walker et al Oct. 6, 19.08

1,165,047 Walker et a1 Dec. 21, 19,15

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