US2683573A - Warp beam - Google Patents

Description

B. B. CARY 2,683,573

WARP BEAM Filed May 5, 1949 FIE- U.

FIE-4; I-

A TTORNEIVS Patented July 13, 1954 WARP BEAM Beecher B. Cary, Jackson, Mich., assignor to Hayes Industries, Jackson, Mich., a corporation of Michigan Application May 5, 1949, Serial No. 91,580

1 Claim. 1

This invention relates to so called warp beams as employed in the textile industry, upon which thread, yarn or fiber is wound to constitute a supply for ultimate use in the fabrication of the thread or the like into a desired article or form.

The present invention is concerned with improvements in such warp beams and With the manufacture and construction thereof from a metal cylinder having metal fianged end caps which provide the end bearings for supporting the beam as a whole and define the side walls of the annulus surrounding the metal cylinder and into which the thread or the like is wound.

In connection with warp beams of the above described character the construction has to be such that the metal end flanges defining the side walls of the annulus are capable of withstanding the exceedingly high pressures developed thereagainst in the winding of the thread or the like into position. While the strength necessary for such purpose can be imparted to the end caps themselves, by appropriate ribbing or reinforcing the caps, this does not take care of the connection of the end caps to the metal cylinder, which connection has to be such that the end caps cannot be broken away from the cylinder in their region of connection therewith.

An object of the invention is to provide a metal warp beam having separate metal fianged end caps telescopically engaged with the opposite ends of the cylinder and inter-connected therewith in such manner that the end caps become intimately interlocked with the cylinder end portions and are not liable to be torn away therefrom in use.

According to the invention a warp beam of the character described is fabricated from metal tubing of the desired length and from separately constructed metal end caps, which latter are formed to have telescopic engagement with the ends of the tubing and this through the medium of an intimate interlocking action between mutually engaged buttress type threads on the telescoped portions, said engaged threads presenting to one another an axially extending series of substantially radial shoulders and inclines, which react with one another to resist an endwise thrusting of the end caps off their respective tube ends, with an attendant wedging of the end caps firmly and closely against the tube ends.

The required intimate inter-connection may be obtained by a shrinking-on process which involves pie-forming the buttress threaded portions of the cylinder ends and of the end caps to different pitch diameters and uniting the parts together with the employment of heat to expand the one part to permit inter-engagement of the threads, followed by cooling with an attendant shrinking of the one part onto the other and the consequential obtaining of intimate interlocking engagement between the respective threads.

The above and further objects and advantages, residing in the specific construction, combination and arrangement of parts will more fully appear from a consideration of the following specification and the annexed claim.

In the drawings,

Fig. I is a vertical section of a warp beam constructed in accordance with the invention, the center portion of the beam cylinder being shown broken-away for ease of illustration.

Fig. II is an enlarged fragmentary section of one of the screw-threaded end portions of the cylinder, and

Fig. III is a similar view to Fig. II but of the screw-threaded portion of the corresponding end cap.

Referring to the drawings, a warp beam is shown composed of a cylinder l0 and a pair of end caps, indicated generally at l2, and each fitted with a bearing spindle 14 both coaxial with one another and with the cylinder and providing a rotatable mounting for the warp beam, when in use. Each end cap also provides an annular flange I6 extending radially from opposite ends of the beam cylinder and defining with the latter an annular cavity 18 into which the yarn, thread or fiber is wound and accommodated in a closely packed assembly as is well known in the art and which imposes a very high outward pressure upon the flanges 16, which latter are ribbed or reinforced, as indicated at 20 to withstand such pressure.

Each end cap is also formed to provide a tubular central sleeve portion 22 which is externally screw-threaded, as indicated generally at 24, for engagement with correspondingly internally screw-threaded ortions of the opposite ends of v. the cylinder, and as indicated generally at 26.

The existence and form of this screw-threading constitutes the essence of the present invention and is the means relied upon to maintain an intimate jointing of the end caps and cylinder ends such that the end caps are not liable to be broken awa from these ends by the pressures acting against the flanges I6 and above mentioned, To this end, the present invention makes use of buttress type threads to constitute the said screw-threaded portions, which threads present axially extending spaced series of substantially radial shoulder abutments 28, 28' and intervening wedging inclines 30, 30 as appear clearly in Figs. II and III. These abutment shoulders and inclines, with the latter directed as shown and the end edges 32 of the cylinder tapered also as shown, provide a secure interlocking action by whichthe mutually; engaged substantially-radial abutment shoulders 28, 23 resist endwise or axial movement of the end caps in the direction of their corresponding cylinden: ends and the mutually engaged inclines 30, 30,

tend to maintain the outer edges 34 of the cylinder ends in close line contactrwith the 'in'sidee surfaces of the flanges 16, whereby touexcludei the existence of any openings at the corners 36.

While provision may be made, for. the extennally screw-threaded cap sleeves 22 to be screwed into position with respect to the interior. sorewthreaded cylinder ends, in which case the screwthreads have the same pitchzdiameters' and .the employment of locking .rivets 38: is indicated'as Y necessary to augment the interlock, it has: been"- foundin practice that a-veryefiicient intimate i Havingthus described myrinvention what-1' clairnruas :novel: and wish to ;cover by Letters Patent is:

A warp'beam adapted to, carry a plurality :of win'dingscof filamentary. materialxand :to. wither stand great pressures exerted by said wound maeterial,. .;comprising a metal cylinder: and :a .pair ofend caps, each end cap having a centrally disi-n posed axial bearing portion, a substantially radial annular flange having a radial inner face and a cylindrical portion extending axially inward from said radial inner face, the ends of said cylinder telescoping over the cylindrical portions of said caps and abutting said radial inner faces to form tight joints, the outer surfaces of said cylindricalportions and the inner surfaces of said ends of said cylinder having buttress-type screw threads thereon shaped as inter-meshing similar opposed alternate wedges and radial shoulders, said opposed wedges having surfaces inclined outwardly toward said flanges and said radial shoulders being in opposed engaging positionsandnthe: end edges of said cylinder tapering outwardly toward said flanges, whereby when sa-id end .capsrare screwed into the ends of said cylinder said opposed shoulders will engage with each other to resist endwise movement of said caps relative to said cylinder and the outer edges of-said cylinder willbe maintained in close line contact with said radial innerfaces, despite the great pressures exerted by said wound material.

References Cited in the file of this patent UNITEDVSTATES PATENTS Number 1 Name- Date 361,289 Howes Apr. 19, 1887 541,507 Sellers June 25, 1895 651,625 Hendrick June-12, 1900 1,004,270 Jahnke' Sept. 26,1911 1,272,581 Van Dom July 16,- 1918 1,287,857 Brandt Dec. 17, 1918' r 1,523,463'- Thomson Jan. '20, 1925 2,144,928 Moncrieif Jan. 24, 1939 2,267,339 Paulsen- Dec. 23,1941

FOREIGN PATENTS Number Country Date- '7/797 Germany Mar. 14,1938

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