US1997521A - Traveler for ring spinning and ring doubling frames - Google Patents

Description

April 1935- c. F. HOFMANN 1,997,521

TRAVELER FOR RING SPINNING AND RING DOUBLING FRAMES I Filed Dep. so, 1932 Urzverzzor: C. F? ofman/z Patented Apr. 9, 193

UNITED STATES TRAVELER, Fort 1,997,521 g p 1 KING SPINNINGANDYBING DOUBLING FRAMES Carl Fritz, Hofmann,

Schonau, near Chemnltz, Germany "Application December so, 1932, Serial No. 649,649

In Gerrnany September 1, 1932 I 1 Claim. (01. -i1a-s1) The invention relates to a traveler for ring spinning and ring doubling frames.

In travelers of this kind there are substantially two different constructional forms, firstly the earshaped traveler andsecondlythe C-shaped traveler. The former runs on a ring, the main walls of which, at the same time formingbearing surfaces for the traveler, extend perpendicular to the ring rail, while in the second constructional form the bearing and running surfaces for the travelerare on a so-called ring -head and'extend parallel to the ring rail. i 1 p The traveler according to the inventionintended more particularly for ring spinning and ring doubling frames belongs to the latter constructional form and is intended for use with the socalled T-shapedtraveler rings.

Such travelers bear during therspinningor doubling operation only with a single place in the interior of the ring at the lower side of thehead, the place of contact changingundertthe action of centrifugal force and of the pull of the thread, while the traveler itself by changing the position of its centre of gravity changes its position with respect to the upperside of the ring head.

During the, swinging motion of the traveler about its variable pointof contact at the inside edge of the ring, which thus occurs, it is possible more particularly when the pull of the threadeases, for the end part of the traveler embracing the outer edge of the ring head to bear withits end edge against the ring neck, the result of which may be to disturb the steady, even running of the traveler with detriment to the spinningor doubling operation.

In order to obviate this disadvantage, according to the invention the traveler is givenin the middle'part connecting its end parts a depression or.

similarly shaped form, bymeans of which it can rest on the upper side of the ring head, as close as possible to the outer rim of the outer edge of the latter, so that the external traveler end more particularly will in no case bearagainst the outer surface of the neck of the ring.

Such a traveler constructed according to, the invention has a kidney-shaped contour and slides with its middle part from time to time, more particularly when the thread tension relaxes, on the surface of the ring head, having a slight braking effect without however catching, which will tend to bring about an equalization of the forces occurring during the movement of the traveler and favourably to influence the so-called traveler,

play. a

In a suitable constructional form the distance between the depression and the connecting line of the two and parts is relatively. great.

This suitableform of the ring traveler according to the invention, of which the sides or end parts, the form of which is arcuate or is based 5 on the arcs of circles, are connected by an arouate andinwardly recessed middle part, provides an increased traveler play with an improved guide ing of thetraveler, while the runningof the trav-' effective.

3 Care should be taken that the curvatures of the arcuate end parts of the traveler are relatively,

eler wilibe easier but more reliable and more Y great, being for instance made sogreat with re- ,chief determining factors for the. traveler play.

When the thread tension relaxes considerably, the middle part which connects the two arcuate end parts of the traveler will rest on the upper surface of the ring head and cause a braking effeet which will occur at the right moment and increase the thread tension and consequently a relifting oi the ring traveler and its return into its floating or suspended position.

The bearing of the traveler with its middle part on the upper surface of the ring head which occurs when the thread tension is smallest has the further advantage that owing to the side or end partsiof thering being arcuate or following the arcs of circles, which parts owing to their suitable shape enable the thread to play easily and do not allow of any jamming or canting, there is an additional favourable guiding of the ring. which guiding acts in opposition to any tendencies ofithe traveler to cant, while a slight additional braking action is produced, which has afavourableeii'ect on the running of the traveler, just at the moment when this is required for bringing the traveler into its best working position, namely the suspended position.

In the accompanying drawing, Figure 1 shows an elevation of a traveler, embodying the invention, normally positioned on airing-head under ordinary working conditions, the rlnghead being shown in section. Fig. 2 is a similar viewpshowing the traveler tilted on the ring-head, due to a lessening of the thread tension.

Referring to the drawing in detail, the traveler ring comprises the flanged head b and the web e of usual construction. On the ring is mounted the kidney-shaped traveler a, comprising arcuate side parts h, with each of said side parts extending through a segment of approximately one-half of a circle. The upper endsv of the arcuate sides are curved to merge into the shallow intermediate projection f, and the lower ends or horns d and d of the arcuate sides are curved inwardly with their extremities spaced apart opposite to each other and opposite to the intermediate projection f. Each of the arcuate side parts has a vertical extension considerably in excess of its horizontal extension between its outer curved side and a line coincident with the apex of the intermediate projection f and normal to a line connecting the extremities of the horns d and df of the traveler element. The excess in the vertical extension of each arcuate side part provides the vertically elongated curved sides h of the traveler.

During a normal spinning or doubling operation the traveler a rides on the ring-head b with the inner arcuate side it in engagement with the inner flange part c of the ring-head b. As the traveler rides around the ring-head, the point of contact of the traveler with the ringhead, as at C, shifts slightly and there is a slight oscillation of the traveler around the flanged headb of the ring, due to the variation of the thread tension, Should the thread tension be lessened sumciently, the traveler would tilt to the left as shown in Fig. 2, causing the intermediate projection to ride on the outer flange of the head 12, as at D. This sliding engagement of the projection ,f with'the outer flange limits the tilting of the traveler, thereby preventing contact of the outer end or horn d of the traveler with the web e of the ring. During the movement of the traveler, should the outer end d of the traveler bear against the web e, the resulting friction would tend to cant the traveler and also cause a lag in the travel of the element.

The canting of the traveler and excessive lag in its travel would interfere with the proper operationof the traveling element. The frictional contact of the intermediate projection f with the outer flange of ring-head would effect a slight braking of the running of the traveler, thereby increasing the tension'of the engaged thread. This increase of the thread tension would lift the traveler to clear the intermediate projection I from the ring-head, and the traveler would be returned to its normal suspended position as shown in Fig. 1.

It will be obvious that the traveler according to the invention can thus slide relatively easily on the upper side of the ring head, but that nevertheless an increased beneficial braking effect is exerted on it, with the result already described.

The advantages of spinning and doubling when using the traveler according to the invention are, besides the improved running of the traveler already referred to and the more favourable play of the thread and traveler, a noticeable falling oil in traveler and thread breakages, more solid winding and the production of a better yarn of greater strength with less inequalities and consequently a considerably increased production.

Furthermore the rings are subjected to less wear and tear and the advantage of the traveler according to the invention is immediately applicable withoutany cost for adapting the machines and without interfering with the normal operation, so that the costs can be greatly reduced.

-What I claim is:

A. ring traveler comprising a kidney-shaped element including arcuate side parts curved into a shallow inwardly projecting intermediate part, with the end parts of the element curved toward each other and their extremities spaced apart opposite to the intermediate part, each of said arcuate side parts being approximately a segment of a circle and extending through about one-half the circumference of the circle, and each of said arcuate side parts having a vertical ex tension considerably in excess of its horizontal extension between the outer curved side' of the side part and a line coincident with the apex of the intermediate projecting part and normal to a line connecting the extremities of the traveler element, said excess in the vertical extension of each arcuate side part providing vertically elongated curved sides to the traveler.

CARL FRITZ HOFMANN.

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