US2645433A

US2645433A - Warp beam

Info

Publication number: US2645433A
Application number: US24942A
Authority: US
Inventors: Carl P Bergstrom
Original assignee: Crompton and Knowles Corp
Current assignee: Crompton and Knowles Corp
Priority date: 1948-05-04
Filing date: 1948-05-04
Publication date: 1953-07-14
Anticipated expiration: 1970-07-14

Description

July 14, 1953 C. P. BERGSTROM WARP BEAM Filed May 4, 1948 FIG.I

l N VE NT OR CARL f? BERGSTROM ATTO RN EY Patented July 14, 1953 ,UNITED STATES PATENT OFFICE 2,645,433 WARP BEAM Carl P. Bergstrom, Millbury, Mass, assignor to Crompton & Knowles Loom Works, Worcester, Mass, a corporation of Massachusetts I Application May 4, 1948,-S erial-No. 24,942

This invention relatesto improvements in warp beams and it is the general object of the invention to provide an improved form of beam head usable more particularly on warp beams of large diameter.

When warp beams are provided with heads of large diameter there is likelihood that the end pressure of the warp. threads will deflect the heads sufficiently to interfere with the winding operation and also the warp letoff operation when the beam is in aloom. Ordinarily, the beamhas a hub or the like which. extends along and in engagement with the barrel of the beam. It is desirable that as much as possible of the length of the warp beam be available for the warp space, and for this reason the hub should be short. With large diameter beams, however, the hub as heretofore constructed cannot be long enough to give the warp head flange adequate support without sacrificing length of the warp space.

It is an important object of the present invention to provide a warp head with a hub of much larger diameter than that of the beam barrel, and supply a support member or disk clamped to the barrel to have close fitting supporting engagement with the hub. In this way the warp engaging part of the warp head is braced at points much farther from the circumference of the barrel than has been possible heretofore and deflection under the end force exerted by the warp threads is greatly reduced.

It is a more specific object of the invention to provide a disk with internal screw threads to permit longitudinal adjustment along screw threads on the barrel and clamp the disk in any desired position along the barrel so that the outer periphery can support a large diameter hub on the warp head flange at points spaced a considerable distance from the barrel.

With 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 accompanying drawings, wherein a convenient embodiment of my invention is set forth,

Fig. 1 is a front elevation of a warp beam made according to the present invention,

Fig. 2 is a vertical section on line 2-2 of Fig. 1,

a Fig. 3 is a vertical section on line 33 of Fig.2,

Figs. 4 and 5 are enlarged horizontal sections on lines 4- -4 and 5--5, respectively, of Fig. 2,

.Fig. 6 is a detailed vertical section on line 66 ofFig. 4, and

Fig. 7 is a diagrammatic view setting forth the advantages of the invention.

a ClailIlS. (01.. aga -12:1)

,Referring particularly to Fig. 1, the warp beam comprises .a barrel l0 which'may be made of ,a metal ,tube having supporting gudgeons ll secured .to the ends thereof. Each end of the barrel .is provided with external screw threads .II2 whichafford adjustment of a warp beam head I-I alongthe barrel. The head H comprises two principal parts one of which is a preferablyflat support member l5, which may be in the form of a disk, and the other of which is a warp engaging flange 16 secured to the member [5. The disk isprovided with internal screw threads II"! which fit the screw threads I 2 and is split radially to form a slot 1.8 which extends from the barrel to the periphery l 9 of member. 15. The periphery 1.9 is preferably cylindrical and concentric with the internal threads I! and the barrel I0, .and spaced a considerable distance radially from the barrel.

A clamping screw 20, shown more particularly in Fig. 4, is provided with screw threads 2| tapped into .a screw threaded hole 22 in that part of the disk 15 to the right of slot [8 as viewed in Fig. 2. The screw 20 is provided with shank 23 extending through a clear hole 24 aligned with the tapped hole 22 on the opposite side of the slot I8. Ahead 25 on the screw 20 is formed with a socket 26 to receive a socket wrench by means of which the screw 20 may be turned into and out of the hole .22 to tighten and slacken the disk relatively to the barrel. The screw 20 is located between an accurately finished flat pressure surface 21 ofthe disk which abuts another accurately finished flat pressure surface 28 on the flange 16 and'the outer surface 29 of the member [5.

The warp engaging flange I6 is formed with a flat web 30 having a warp engaging surface 3! andhavinga hub 32the inner surface 33 of which is turnedaccurately to have a close fit with periphery 19 of disk I5. Surface 33 is cylindrical and concentric with the axis of barrel I0, and is spacedpa considerable distance from the barrel I 0. The flange I6 may be made of any desired metal, such as magnesium or an alloy thereof.

The head H is provided with holding screws 36, three of which are shown in Fig. 2. The disk is .provided with transverse clear holes 31 some- What larger than the diameter ofthe screws 35, and the latter are tapped into screw threaded holes 38 in part 39 of web .30 which may be thicker than thelouter part 40 of the web. Each screw 36. has a head 4! locatedina recess 42 formed in. the disk lias part of hole 31. A washer 43 is located between the head 4| and that part of i 32 and has a tapered end or nose 46 aligned with slot I8, see Fig. 2. The hub 32 also has an aperture or opening 47 aligned with

holes

22 and 24 to receive a wrench or similar tool not shown for cooperation with the socket head 25 of the clamping screw 20. The surface 28 of web part 38 and the internal finished surface 33 on hub 32 define a pocket or recess 48 to receive and inclose the disk I5. As shown in Fig. 6 the disk is considerably thicker than the web 30.

After the parts have been made substantially as described the disk will be fitted into the recess 48 with the spreading screw 45 backed'off but aligned with slot I8. The tapered end 46 of screw 45 may if desired project into slot I8 to guide the disk and register the holes 37 with tapped holes 38. The holding screws 36 are then turned in holes 38 but left loose enough to permit contraction of disk i5. The screw 20 will be loose andaligned with the perforation 41. The head H is then ready for application to the beam I and can be turned on the corresponding screw thread I2 to move along the barrel to the desired position. The clamping: screw 20 will then be tightened to establish firm holding connection between the barrel and the disk. The holding screws 36 are then tightenedto draw flange I into close fitting relation with disk I5. As shown in Fig. 3 the outer periphery IQ of the disk will be in close engagement with the greater part of the interior surface 33 of the hub 32 at points spaced from barrel It.

It is to be understood that each of the holding screws 36 will pass through a hole 37 substantially as shown in Fig. 5 to permit the disk I5 to fit into the recess 48 without requiring a high degree of accuracy in placement of the tapped holes 38. When it is desired to change the adjusted position of the head H along the barrel I0 the screws 36 can be slackened and the clamping screw loosened, after which turning of the head 1-1 will move it to a new position on the barrel. If it is found that the disk sticks too tightly to the barrel ID to permit free turning of head H, the screw may be turned in toward the barrel until its tapered end 46 enters the slot I8 to spread the lower spaced parts of the disk as viewed in Fig. 2.

The advantages of the present invention are set forth diagrammatically in Fig. 7. In the usual type of warp beam the hub of the flange is close to and in engagement with the barrel I0, and the amount of support which it can give to the outer part of the web 33 is comparatively small. Thus, line a, Fig. 7, represents the warp engaging surface and the line b represents the length of the hub as ordinarily located. These two lines and line 0 define a triangle with a rather small base which is not able to afford much support for the outer part or rim of flange I6, and the latter will be deflected considerably as indicated by line 01 when the beam is full of warp.

Lines e, f and g in Fig. 7 indicate the advantage of the present invention. Line e corresponding to the width of surface IS on disk I5 i the base of a triangle including lines 1 and the outer part of line a. This second triangle has a base which proportionately is much broader than base I) of the first triangle. Base 6, however, i no longer than base b therefore occupies no more space longitudinally along the barrel than does base 1). Because this second triangle is relatively much stiffer than the first triangle there will be very little if any outward deflection of the rim of flange I6. Such deflection as does occur, indi- 4 cated by line 9', will be very much less than the deflection represented by line (1.

From the foregoing it will be seen that I have provided a warp head of simple construction wherein the outer parts of a warp engaging flange of large dimension are supported by a support member or disk I5 having a diameter very much greater than that of the barrel ID. This result is accomplished without increasing the overall thickness of the head measured along the barrel, and the disk I5 can be housed within the hub 32, as shown in Fig. 3. the screw threads I2 by means of a clamping screw 20 whichis confined within the disk, and the holding screws 35 secure the parts I5 and I6 together tightly so that the entire head H is rigidly held in adjusted position along the barrel. Screws 35 also align the aperture 4! with the screw 25. Furthermore, should it be necessary to release the disk from the threads l2 when making a new adjustment of the head the spreading screw 45 can be turned inwardly to move its tapered end 46 into the slot It to effect a slight spreading of the lower parts of the disk as viewed in Fig. 2. I do not wish to be limited to the particular procedure described for assembling and tightening the warp head. Furthermore, certain features of the invention do not require the external threads I2 and the internal threads H. In actual practice warp heads made as set forth herein using warp flanges I6 of large diameter show much less deflection at the outer rim than do heads made according to previous practice, and this is due in large measure to the fact that the hub 32 of flange I8 is supported by rim I9 of disk. or support member I5 at points spaced radially a considerable distance from the barrel.

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 the spirit 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 warp beam having a barrel, 'a support member surrounding the barrel and having a pcriphery spaced radially from the barrel, said support member having a slot therein extending from the barrel to said periphery, a clamping screw extending across said slot to clamp the support member to the barrel, a warp engaging flange, a hub formed on said flange engaging said periphery, and a spreading screw tapped into said hub in alignment with said slot to enter the latter to spread the support member relatively to the barrel when the clamping screw is released.

2. A warp beam having a barrel, a head on the barrel, a warp engaging flange on the head, an annular hub on the flange coaxial with the barrel, a support fitting in said hub, said support being threaded to the barrel for adjusting the head along the barrel, said flange and support having faces lying approximately in planes perpendicular to the axis of the beam, and means passing through either the flange or the support into the other of said elements for clamping the adjacent faces thereof together.

3. A warp beam having a barrel provided with external screw threads, a head on the barrel, a

The disk I5 is clamped to approximately in plane perpendicular to the axis of the beam, and screws passing through the support and into said flange for clamping the pressure faces together and for holding said periphery and the internal surface of said hub in position to engage each other radially.

' CARL P. BERGS'DROM.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date Sands July 6, 1909 Martiti June 30, 1936 Leinbach Jan. 17, 1939 McCaslin Feb. 5, 1946