US2620999A - Traverse guide - Google Patents

Description

19.52 R. H. CARTER ET AL 2,620,999

TRAVERSE GUIDE Filed Sept. 14, 1949 and Ralph H. Carfer BY fleag M41 ATTORNEY Patented Dec. 9, 1952 TRAVERSE GUIDE Ralph H. Carter, Johnson City, and Chadwick B. Kingsbury, Elizabethton, Tenn., assignors to North American Rayon Corporation, New York, N. Y., a corporation of Delaware Application September 14, 1949, Serial No. 115,708

5 Claims.

This invention relates to improvements in thread traverse guides of the type used on textile machines and more particularly to a reciproeating thread guide suitable for use on winding and coning machines and the like.

One of the objects of the invention is to provide a thread traverse guide wherein the thread guide member is able to turn or pivot in slightly frictionally restrained fashion about the traverse bar that carries and reciprocates it, so as to float yieldingly against the package of thread as it builds up.

Another object is to provide damping means for controlling the pivotal movement of the guide about the traverse bar so as to avoid backlash between the guide and the traverse bar and to prevent radial oscillations of the guide from causing the latter to strike against the thread package.

A further object is to render the thread guide self-threading so that the thread, if accidentally or intentionally disengaged from the guide will be automatically picked up by the guide during its reciprocation, thus avoiding the building up of uneven places on the thread package.

In winding thread or yarn on longitudinal rows of spools or packages in winding machines and the like, a thread guide constituted as an arm with an eye or the like for holding the thread is provided for each individual package or spool and it is customary to reciprocate a considerable number of such guides simultaneously by means of a common traverse bar. For this purpose the individual guide members are pivotally mounted on the traverse bars at spaced intervals corresponding to the location of the spools or packages. The thread guide, as it reciprocates, bears of its own weight against the package or spool and lifts up radially as the size of the package increases. If slubs, knots or the like occur in the thread that is being wound, the guide, if loosely pivoted on the traverse bar may lift from the package and then abruptly drop back thereon. The hammer-like blows produced by such sudden radial movements or bouncing of the guide member against the package prevents the building up of uniformly round, self-supporting yarn packages. Another drawback to prior art methods of mounting the guides pivotally on the traverse bar resides in the backlash or play producecl between the guide member and the traverse bar, which also prevents the formation of uniformly round packages. Although such backlash can probably be substantially eliminated by suitable adjustable bearings, such adjustment involves expensive maintenance when great numbers of such guides are used.

The purpose of the present invention is to provide a simple and efiective means for pivotally mounting a thread guide on a traverse bar or a plurality of such guides on a common traverse bar in such fashion as to permit pivotal movement of the guides but yet prevent radial oscillation of the guide and the striking of the latter against the package as well as prevent all backlash between the guide and the bar. To this end the guide is provided with support means for mounting the same on the traverse bar such support including a V-shaped member for resting on said bar in straddle fashion to make tangential contact at places of substantial linear extent on the bar and a fiat spring-like member which engages in a shallow groove in the bar directly beneath the V-shaped member and which serves both to hold the V-shaped member and hence the thread guide frictionally seated on the bar but so that the guide is able to pivot about the latter. The flat spring-like members which engage in the spaced grooves in the traverse bar when a number of guides are operated by a common traverse bar serve to hold the guides in spaced position thereon and in aligned relation to the package undergoing winding. The structure is such that the entire thread guide can be readily snapped into its intended position on the traverse bar as well as easily removed therefrom by a quick sidewise movement.

In accordance with another feature of the invention, the portion of the thread guide which actually guides the thread into place on the spool is made self-threading. This portion is constructed as an upstanding finger slanting out from the horizontal plane of the portion that bears on the package and serves to pick up the thread if it has become disengaged and to direct it back to the thread-retaining notch or groove provided in the guide, during the movement of the latter.

The invention is shown in the drawing, where:

Fig. 1 is a side view, partly in section, showing the thread traverse guide in operating position.

Fig. 2 is a top view of the thread traverse guide.

Fig. 3 is an end view of the front'portion of the thread guide member per se.

Fig. 4 is a bottom view of the thread guide showing the manner of mounting the same on the traverse bar. i

Fig. 5 is a side view, in section, on line 5 --5 of 'Fig. 2. H

Fig. 6 is a section through the guide member on line 6-6 of Fig. 2.

Fig. '7 is a bottom view of the groove of the guide member.

In the drawing the numeral l designates a spool or package on which thread 2, coming in the direction of the arrow 2| from a source of supply, not shown, is being wound. The thread is guided onto the package by means of the thread guide described generally above. Considered in detail the latter consists of a rod 3, preferably round, having a portion 4 bent off laterally and continuing as a slightly downwardly slanting strai ht portion 5 extending parallel to but offset with respect to 3, said portion 5 being return-bent in the opposite direction to form the part 6 that actually bears on the package, the part 6 being substantially parallel with the traverse bar hereinafter described and ending in a finger-like portion 1 extending upwardly in slanting fashion from the horizontal plane of part 6 the end of the bottom of portion 1 being chamfered as at 22. The bottom side of the portions 4, 5 and 6 are preferably fiat with rounded edges adapted to exert a smoothing action on the package rather than make linear tangential contact therewith as would be the case if these parts were cylindrical in cross section.

A notch or groove 8 is provided crosswise of the portion 6 of the guide, said notch having flared openings as shown in Figure '7, facing the package I and the oncoming thread.

The above-described guide is mounted on the transverse bar 9 as follows. The round rod-like portion 3 of the guide member is attached to a support member indicated generally by lil which preferably tapers at the front as at H where it is shaped to form a short semi-cylindrical housing l2 for receiving the round portion 3 of the guide, the portion 3 being brazed, welded or other wise securely held in the housing. The rear portion of the support IE1 is shaped as shown in Figures 1, 4, and 5, the metal thereof being bent into inverted V shape, the sides [3 and M of which make tangential linear contact of substantial length with the traverse bar 9 as indicated at [5 and [6 in Figure 5. The rear side 14 of the V is preferably rounded off and terminates in an upwardly slanting tailpiece i'a'. Rigidly fastened to the lower side of member H] as by rivets [8 or otherwise is a strip of springy metal IQ of suflicient rigidity to force the sides of the inverted V shaped portion in the previously mentioned linear tangential contact fashion against the traverse bar 9. The traverse bar is provided with a peripheral groove 20 at every place that a guide is to be mounted and the strip l9 fits accurately in said groove and thus prevents lateral wandering of the guide along the bar 9 during the winding operation, the groove 20 and the strip 19 therefore also serving as a means for locating the thread guide on the bar.

The structure described permits the threadguide member to turn radially about the bar 9 in frictionally damped fashion. It therefore allows the guide to rise radially as the package builds up but damps the movement of the former and prevents it from pounding or slapping back against the package when said guide is suddenly lifted by slubs, knots or the like present in the advancing thread. Due to the springy nature of the strip IS, the entire guide member can be instantly snapped off from the traverse bar 9 by a quick sidewise movement and as rapidly replaced in the same manner without requiring the dismantling of any bearings for such removal of the resetting of any adjustments after it is replaced in position. All backlash between the bar 9 and the walls [3 and I4 that repose in linear tangential fashion on the bar is prevented due to the accurate fitting of the strip [9 into the groove 20. The tailpiece H extends rearwardly and upwardly in slanting fashion and the end of the spring strip l9 extends rearwardly and downwardly as shown in Figure 5, leaving a substantially wedge-shaped opening to facilitate snapping the guide on to the bar 9 and for removing it therefrom.

The finger-like outwardly slanting extension 1 at the thread guiding end of the guide serves as an automatic thread pickup if the thread for any reason becomes unhooked from the guide. This finger picks up the thread, as the guide reciprocates and directs it back into the groove 8. The under side of the guide, bearing on the package, is flattened, and the edges are rounded, whereas the under side of the outer end of the finger is chamfered at 22 as shown in Figure 3. The off-setting of the portion 5 of the guide makes it possible to locate the thread groove 8 substantially in line with the rear portion 3 of the guide and also prevents the thread from rubbing against any portion of the guide except the grooves during normal operation, the thread only contacting briefly with the under side of the finger I if such thread has been accidentally unhooked from the groove and is being automatically picked up by said finger during the reciprocation of the guide for return to the groove.

What is claimed is:

1. In a thread traverse guide adapted for mounting on a traverse bar of round cross section and comprising in combination a thread guide and a support member therefor, said guide comprising a rod portion extending forwardly and centrally of said support member, said rod portion having a part forwardly extended but laterally offset therefrom and terminating in a thread package contacting part substantially parallel to said traverse bar, said contacting part having a thread guiding groove on its thread package contacting side located substantially along a line drawn as an extension of said rod portion, and terminating in an upwardly and ouitwardly extending end with respect to the package, and adapted to engage thread disengaged from said groove and to direct it back into said groove during the reciprocation of said guide, said support portion having a channel adapted to straddle said traverse bar along a tangential line of appreciable extent parallel to sa d bar, a resilient member extending across said channel and carried by said support portionand bearing against said bar thereby permlttmg frictionally damped pivoting of said guide about said bar.

2. In a thread traverse guide adapted for mounting on a peripherally grooved traverse bar of round cross section and comprising in combination a thread guide and a support member therefor, said guide comprising a rod member extending forwardly and centrally of said support member, said rod portion having a portion forwardly extended but laterally offset therefrom and terminating in a thread package contacting part substantially parallel to said traverse bar, said contact part having a thread guiding groove on its thread contacting side located substan tially along a line drawn as an extension of said rod portion and terminating in an upwardly and outwardly extending end with respect to the package, and adapted to engage thread disengaged from said groove and to direct it back into said groove during the reciprocation 01 said guide, said support member comprising a flat portion having an inverted V-shaped channel the internal sides of said V-shaped channel reposing against said traverse bar at two opposite places on the latter along tangential lines of appreciable extent parallel to said bar, a resilient member carried by said support member extending across said channel and engaging against said bar to yieldingly hold said bar in said channel, thereby permitting frictionally damped pivoting of said guide about said bar.

3. A thread traverse guide adapted for mounting on and for frictionally damped pivotal movement about a traverse bar of round cross section comprising a thread-guide holding portion having a pair of angularly arranged sides adapted to straddle over and contact tangentially with said bar, a member carried by said holding portion and extending across the channel formed by said angularly arranged sides and in such spaced relation to said channel as to bear against said traverse bar to confine said bar within said channel in frictionally damped pivotal fashion when said guide is mounted on said bar.

4. A thread traverse guide adapted for mounting on and for frictionally damped pivotal movement about a traverse bar of round cross section comprising a thread-guide holding portion having a channel of substantially v shape adapted to straddle over said bar, the inside walls of said channel contacting tangentially with said bar at two places on the latter along lines of appreciable extent parallel to said bar, a resilient member carried by said holding portion and extending across said channel in spaced relation to said channel and bearing tangentially against said traverse bar to confine said bar within said channel in frictionally damped pivotal fashion when said guide is mounted on said bar, the resilience of said resilient member being such as to yield sufficiently and permit said traverse guide to be snapped into place on and removed from said traverse bar.

5. A thread traverse guide adapted for mounting on and for frictionally damped pivotal movement about a peripherally grooved traverse bar of round cross section comprising a threadguide holding portion having a channel of substantially V-shaped configuration adapted to straddle over said bar, the inside walls of said channel contacting tangentially with the nongrooved portions of said bar at two places on the latter along lines of appreciable extent parallel to said bar, a resilient member carried by said holding portion and extending across said channel in spaced relation to said channel and having a portion fitting in said peripheral groove of said traverse bar and bearing tangentially against said bar to confine said bar within said channel and to prevent longitudinal shifting of said guide along said bar while permitting frictionally damped pivotal movement of said uide about said bar, the resiliency of said resilient member being such as to yield suificiently to permit said traverse guide to be snapped into place on and removed from said traverse bar.

RALPH H. CARTER. CHADWICK B. KINGSBURY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 110,535 Altemus Dec. 27, 1870 801,476 Pierce Oct. 10, 1905 1,049,798 Babcock et al. Jan. 7, 1913 1,134,336 Haughton Apr. 6, 1915 1,503,713 Sanders Aug. 5, 1924 1,966,500 Havey July 17, 1934 2,052,226 Holley et a1 Aug. 25, 1936 2,081,548 McHale May 25, 1937 2,152,136 Cass Mar. 28, 1939 2,307,664 Brookshire Jan. 5, 1943 2,370,731 Jackson Mar. 6, 1945 FOREIGN PATENTS Number Country Date 616,106 France Oct. 25, 1926

Images