US2268772A - Method of making ring travelers - Google Patents

Description

Jan. 6, 1942. E. a. PETERSON 2,258,772

METHOD OF MAKING RING TRAVELERS Original Filed July 19, 1935 IN VEN TOR.

J71? Pa 2 2/3011 A TTORNEYS.

vention' consists struction, as will be more fully described, and

Pam; -a

' sesame nmdrnsvstsss r t em amen-reunion} momma nr, smor a lung Traveler Company, acorporation of lthode Island Application July 19,1935, sol-in no. 32,266

Renewed July V25, 19; I

@ "iClaims This inventionrelates to a ring traveleri-and has for one of litsob'iects theshapingof the wire whichforrns traveler such that-there will be provided alonger 'wearing life for the V Another 'obiectjof f e inverition:is to provides traveler' which" by roosonor the shape ofcits'wire, will have less friction and provide acooler"run ning traveler and one which may be thicker and thus wear longer than those heretofore provided. f

{Another object of the invention is the provision of a traveler which willminimizebreak age causedby a progressive fracture or sometimes called fatigue by stiffening and strengthening the bends. q

Another object of the invention isfto lessen through rearrangement and] withoutheating the strains of tensionand compression in the stock of the traveler about the; bends which trol thereof.

where' the metal pulled apart,- while there are compression strains int,"

side of the bendwhere the metal has beencompressed or crimpedfduei to bending "I'he bends 20 of this sort which cause-theemetal to be placed also affect the hardness, *forfinstance according sometimes cause a progressive-fracture to occur. V I 4 With these and otherobj'ects in view; themof certain novel features of con-1 Y [along'the central or neutral ax'ia and 83 on the V particularly pointed-out in the appended claims;-

In the accompanying drawing; Fig. 118 a perspective view efa enlarged size after it has -be en taken from the forming tool: 1

Figs, 2 tot, inclusive, showthls traveler after being deformed -in difierent portions along the length of the wlre eachyone being a modification with reference to the other;-

Fig. 9 is aiperspeetive view'of a length of wirefromwhich the traveler is formed.

traveler of an a cits-4 1) with flat surfaces 20 wire or this crosssection isbent in a cold condition about o; form! ing tool with the flat surfaces-parallel to the axes of the arcs of bending to provide ashaping of the wire which willi'lt about the opposite edge's of the ring and'provide a'space to allow yarn to pass through the traveierfor the proper con- The bends which cause themetal' or wire to be placed under ten? sion'stralns I H bends, as designated at II and ll" in Flgu'ie'l, is stretched or tendedto be in Flgure i' on the inner or underunder" these strains' of tension 1 and compression to the Rockwell: standard of hardness whereas the shank originally'has a hardness of p82 outer surface or edge asgdesignated by these correspondingfnumerals in Figure 1,. it will be found that along the bend-at the neutral axis the'hardness will be 83, 83.5, 86 and 8 5.5-at the corresponding locations which the lead; lines of these numbers designate in Figure -Lwhile on 1, the outer surface the hardnesswill be found to After a traveler has been formed up bya bend- I ing of the wire, one of the conventional forms of relieving strain in-the traveler is to apply a 7 low temperature? heat treatment; which treatment serves to relieve to some extent the strains of tension and compression. However, instead of this heat treatment, I relieve the strains of tension and compression by deforming the stock of the wire whereby the strains are substantially eliminated in the finished traveler; and the 5| formation of travelers, the same are jected to strains or stresses in opposite directions after a time fatigue,

be 90 andon the inner surface 91 at the point of greatest curvaturewhereas at the tips'ofthe wire it will be 86,-asindicated. The bending of the wire around the former causes, the metal to be placed under addltional'tension and compression strains in the bends,xmaterially increasing the'surface hardness of the bends-although only slightly affecting the central or neutral axis. r If the traveler is left as bent with the strains of tension and compression in the metal, al-

though the traveler as a whole is capable of withstanding the forces it will be found that where the traveleris-subor in different-directions that the materiabwlll these small cracks will penetrate deeper and deeper through the stock of the wire until finally there remains an insumcient cross-section of the are necessary inthe wire I form curvatures which are rather a sharp and r at'thei outside or periphery of;.the

under which it is. put,

that is, smallcracks will a start in the surface, and as the vibrations and alternate opposite strains occur-such as mayoccur in the traveler due to rough rings, uneven tension from knots in the yarn or the like, that;

rough and unpolished. This is usually known as fatigue, and a break of this character has been found to occur more largely where alterations of stresses and strains of compression and tension exist.

In order that the strains of compression and tension in the wire may be relieved or rearranged to a large extent I have deformed the wire by a striking, rolling or hammering operation to flatten portions of it such as shown at I! and I. in Figure 2 at the curved portions thereof, which flattening serves to rearrange the strains of tension and compression so that the alternating or vibrating strains such as occur in operation on poor, rough rings or due to dry spots or the like or uneven tension will not cause the traveler to fail or have a progressive break as quickly as would occur if the strains were not so rearranged.

The, deformity or flattening which I provide is in a directionparallel to the axis about which bending occursgand serves to thicken the stock of the traveleror increase its dimension at right angles to a tangent to the surface of the ring against which it wears to such an extent that the thickness is often greater'in the area of wear than the originalthickness of the traveler so that although there is a reduced amount of surface area for contacting with the ring with respect tothe'usual construction, its depth is greater and-its wearing life is longer both by reason of the action of the thread and the rin and further, by reason of this flattening or thinning out of the traveler in this dimension a greater wind area is provided effecting faster heat dissipation resulting in a cooler and longer wearing life of the traveler than would otherwise occur which is highlydesirable.

While I have shown in Figure 2 a flattening occurring at the opposite ends of the top and bottom oi a traveler of a vertical type, this flattening may occur only at the top as shown at I! in Figure 3, or it may occur at the top and along the shank as shown at I! and I1 in Figure ,4, or merely'at the bottom as shown at II in Figure 5, or along the shank onlyas shownat I! in Figure 6, or along the shank and bottom asshown at H, II in Figure 7, or it may occur along the entire length of the wire as shown at l5, H, il in Figure 8. Thus, the strains caused by flat rolling of the wire and the additional strains put in by bending are relieved and rearranged. This change also affects all of the physical properties of the metal, there being a change of tensile strength wear resistance, etc.

The foregoing description is directed solely towards the construction illustrated, but I desire it to be understood that I reserve the privilege of resorting to all the mechanical changes to which the device is susceptible, the invention being defined and limited only by the terms of the appended claims.

I claim:

1. The method of forming a traveler from a length of wire, comprising bending the wire to the desired shape and then deforming the crosssection of the wire to relieve or rearrange some of the strains placed therein by bending.

V 2. The method of forming a traveler from a length of wire, comprising bending the wire to the desired shape and then deforming the crosssection of the wire along the bent portion to relieve or rearrange some of the strains placed therein by bending.

3. The method of forming a traveler from a length of wire, comprising bending the wire to the desired shape and then flattening the crosssection of the wire to relieve or rearrange some of the strains placed therein by bending.

4. The method of forming a traveler from a length of wire, comprising bending the wire to the desired shape and then deforming the crosssection of the wire by hammering to relieve or rearrange'some of the strains placed therein by bending.

5. The method of forming a traveler from a length of wire, comprising bending the wire to the desired shape and then flattening by pressure applied in a direction at right angles to the axis of the bending.

6. The method of forming a traveler from a length of wire, comprising bending the wire to the'desired shape and then deforming the crosssection of the wire by force applied at right angles to the axis of bending.

7. The method of forming a traveler from a length of wire, which consists in flattening the wire toprovide a width greater than its thickness, bending the wire about an axis generally parallel to the width dimension to the desired shape traveler, and then applying pressure in a direction to increase the thickness and decrease the width of the wire.

ERIC GILBERT PETERSON.

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