US1342876A - Warp-clamp - Google Patents

Description

J. B. SINDERSON. WARP CLAMP. APPLICATION man AUG.22. 1911.

1,342,876. 1 Patented June 8, 1920.-

UNITED STATES PATEli"? OFFICE.

JOHN B. SINDERSON, OF ROCKFORD, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO BARBER-COLMAN COMPANY, OF ROCKFORD, ILLINOIS, A CORPORATION OF ILLINOIS.

WARP-CLAMP.

Specification of Letters Patent.

Patented June 8, 1920.

Application filed August 22, 1917. Serial No. 187,521.

To all whom it may concern:

Be it known that I, J OHN B. SINDERSON, a citizen of the United States, residing at Rockford, in the county of Winnebago and State of Illinois, have invented certain new and useful Improvements in arp-Clamps, of which the following is a specificatiom The object of this invention is to provide an improved clamp for holding a warp or series of warp threads firmly enough to permit 0f tensioning the threads sufliciently for the proper operation of thread-selecting and separating devices, and still allow each warp thread to be pulled out of the clamp by the needle or other operating device.

In the accompanying drawings Figure 1 is a fragmental front elevation of a warp clamp embodying the features of my 1nvention. Fig. 2 is a transverse sectional View of the clamp showing the same in the opened condition. Fig. 3 is an end elevatlon of the clamp showing the same closed. Fig. 4 is a sectional view of the closed clamp. Fig. 5 is a perspective view of a spring clip forming part of the clamp. Fig. 6 is a fragmental top plan View showing the clamp closed.

The improvement is capable of use in connection with warp drawing, warp tying, lease-picking, and various other classes of machines for operating upon warps.

The embodiment herein shown of the invention comprises a bar 1 of angular crosssection supported in any suitable manner, as, for example, by means of brackets 2 attached to the supporting frame (not shown) of the machine. Suitably fastened to .the inner faces of the flanges of the bar 1 are two longitudinal strips 3 of friction material, as rubber, the strips being of uniform thickness. The clamp further comprises a roller 4 provided with trunnions 5 which are loosely mounted in bearings 6 carried by arms 7. The arms 7 are pivotally supported in any suitable manner, being herein shown as pivoted to the brackets 2 at 8. The roller 4 is of uniform diameter and is covered with suitable friction material 9. WVhile various materials may be employed, satisfactory results have been obtained with a woven fabric known as No. 22 felt cloth. The roller 4 is so mounted as to bear against the two rubber strips 3 when the arms 7 occupy the position shown in Figs. 1, 3, 4'

and 6. The trunnions 5 are loosely supported in the bearings 6 in order to permit the roller 4 to seat itself with equal pressure against both of the rubber strips 3. The roller is held firmly pressed toward the bar 1 by means of any desired number of spring clips 10 adapted to embrace said roller and bar. The clips 10 may be of any necessary stiffness.

When the clamp is open as shown in Fig. 2 the roller 4 is supported in a suitable man ner, as, for example, by engagement of the ends of the trunnions 5 with the brackets 2.

Assuming that the clamp is open and that the end of the warp a is held in a plush clamp or other suitable holder 6, the oper ation of loading the clamp is as follows: The warp is drawn towardthe bar 1 and laid across said bar with the plush clamp b hanging in the space between the bar 1 and the roller 4, as shown in Fig. 2. The roller is then swung upward and forward against the warp, and a suitable number of spring clips 10 are put in place to cause the roller 4 to clamp the warp threads firmly against the rubber strips 3. The clamp b is then removed and the ends of the threads trimmed to the desired length.

By reason of the character and arrangement of the friction surfaces and the pressure exerted by the clips 10, the threads are held with sufficient firmness to allow the threads to be given the tension necessary for the satisfactory operation of warpthread selecting and separating devices, but not so tightly that they cannot be withdrawn from the clamp by a warp-drawing needle or other operating device.

The roller 4 may be turned to distribute the wear of the friction material 9.

If desired, the threads may be tightly gripped in the clamp, so that they cannot be pulled out, by using a suflicient number of clips 10 of the required stiffness.

While I have described the present embodiment of the invention with considerable particularity, it will be understood that the invention is not limited to the construction herein disclosed, and that various modifications may be made without departing from the scope of the invention as defined by the appended claims.

I claim as my invention:

1. A warp clamp having, in combination,

supporting means, a clamp member connected to said supporting means and having two spaced friction surfaces, arms pivoted to the supporting means, a clamp member carried by said arms and arranged to be swung into and out of operative relation to the first mentioned clamp member, the sec- 0nd mentioned clamp member being loosely connected to said arms so as to be free to seat itself against said surfaces, and means for pressing said clamp members together.

2. A warp clamp having, in combination, supporting means, a clamp member connected to said supporting means, arms pivoted to the supporting means behind the clamp member, a clamp member carried by said arms and arranged to be swung into and out of operative relation to the first mentioned clamp member, there being a space between said clamp member for the insertion of a warp clamp when the second mentioned clamp member is in inoperative position, and means for pressing said clamp members together when the second mentioned clamp is in operative position.

3. A warp clamp having, in combination, an angular bar, a friction strip secured to the inner face of each flange of the bar, said strips being spaced apart, a member having a rounded friction surface adapted to press a sheet of warp threads a ainst the faces of said strips, and means for pressing together the bar and said member.

4. A warp clamp having, in combination, two parallel friction strips, the faces of said strips lying in planes extending at an angle to each other, a roller, and a friction covering for the roller, said roller being arranged to press a sheet of warp threads into the angle between the faces of the friction strips.

5. A warp clamp having, in combination,

an angular bar, a rubber strip secured to the inner face of each flange of the bar, a roller having a covering of felt cloth, mem bers for supporting said roller for movement toward and away from said rubber strips, the roller being loosely connected to said members, and means for pressing the roller toward the bar.

6. A warp clamp having, in combination, two parallel friction strips spaced apart, the faces of said strips lying in planes extending at an angle to each other, and a member having a rounded friction surface adapted to press a sheet of warp threads intothe angle between the faces of the friction strips.

In testimony whereof, I have hereunto set my hand.

JOHN B. SINDERSON.

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