US2520471A - Traveler for ring twisters - Google Patents

Description

Aug. 29, 1950 H. J. POTTS TRAVELER FOR RING TwIs'rERs Filed July 14, 1949 W Zinventor fiPEE/P? J. 0rrs iPulente-ti Aug. 29, 195% Y N l T D S TAT E S PATENT OFFICE TRAVELER FOR RING TWISTERS Application July 14, 1949, Serial No. 104,619

2 Claims.

This invention relates to ring travellers for spinning and twisting frames and has for an object to provide a traveller having novel and improved characteristics.

Another object is to provide a traveller of light weight which is capable of exerting a predetermined drag during the spinning or twisting operation.

Another object is to provide a traveller of the above type in which the drag is not dependent upon the friction between the traveller and the ring. I

Another object is to provide a traveller which operates with a controlled tension, produces an even twist, introduces a minimum of strain on the yarn as the spindle starts to rotate, and has an improved life.

Various other objects and advantages will be apparent as the nature of the invention is more fully disclosed.

In accordance with the present invention the traveller is made light in weight and is designed to operate on a well lubricated ring with a minimum of friction. In order to cause the traveller to exert the required drag on the yarn it is provided with one or more fins which encounter air resistance to oppose the movement of the traveller on its ring. The size and distribution of the fins is so selected that a predetermined drag is thus introduced which remains constant at any given speed of operation. Hence for a given spindle speed and operating conditions the yarn is wound upon a predetermined, uniform tension and a predetermined amount of twist is imparted thereto.

Since the traveller does not depend for its drag upon its weight or its friction with the ring, the ring may be completely lubricated at all times and the traveller is kept cool both by reason of the lubrication and by reason of the flow of air over the fins.

The nature and characteristics of the invention will be better understood by referring to the following description, taken in connection with the accompanying drawing in which a specific embodiment thereof has been set forth for purposes of illustration.

In the drawing:

Fig. 1 is a side elevation of a spindle and traveller with the ring in section illustrating one embodiment of the invention;

Fig. 2 is a top plan view thereof; and

Fig. 3 is a perspective view of the traveller.

Referring to the drawing more in detail, the invention is shown as applied to a ring l form- 2 ing a part of the spinning frame and carrying a traveller I I. The ring I0 is supported by suitable means indicated as a frame I2. The ring I0 is provided with oil grooves H and with an upper guiding rim I 5 and a lower guiding rim l6 over which the traveller ll rides.

In the form shown the traveller H comprises an inner vertical portion I! having a U-shaped upper flange l9 and a U-shaped lower flange 20 which seat over the upper and lower guiding rims l5 and I6 respectively of the ring and hold the traveller in place thereon during the spinning operation. Air fins 22 and 23 are carried by the upper and lower flanges respectively and are disposed transversely with respect to the direction of movement of the traveller so as to produce a predetermined air resistance as the traveller rotates rapidly around its ring.

The yarn 30, which is being spun or twisted, is passed under the upper flange 19 of the traveller and thence onto awinding 3| on a spool or bobbin 32 mounted on a spindle 33 which is rotated and reciprocated vertically in the usual manner.

During the spinning or twisting operation the traveller II is caused to rotate rapidly around the ring In in a well known manner. The traveller, however, exerts a predetermined drag on the yarn 3B which is being wound on the bobbin 32.

' This drag remains constant during the winding operation. Hence the yarn may be wound under a predetermined tension to form a compact package on the bobbin.

Among the advantages of the present invention are greater wear life for both the ring and traveller due to improved lubrication which re sults in the cooler running of the traveller and consequently fewer changes of the traveller are required. It is also possible to operate at increased spindle speed thereby further increasing the production. The controlled tension results in an even winding on the spool or bobbin with a uniform twist. The breakage of the yarn particularly during the starting of the spindle, is reduced inasmuch as the traveller may be made comparatively light thereby reducing its inertia and correspondingly reducing the strain on the yarn as the spindle starts to rotate. A further advantage resides in the reduction of the number of different weights of travellers that must be kept in stock.

Obviously the air fins may be disposed in different locations on the traveller. In the form shown the top and bottom fins provide a balanced operation and are designed to exert substantially the same drag at the top and bottom thereby reducing the tendency for the traveller to tilt over and drag or bind 0n the rims of the ring during operation.

What is claimed is:

1. A spinning or twisting frame for yarn comprising a rotating spindle, a traveller ring disposed thereabout, and a traveller riding on said ring, said traveller having upper and lower flanges disposed to guide the same on said ring, and fins disposed on said upper and lower flanges and extending in a direction transverse to the direction of movement of said traveller around said ring to introduce air resistance to the movement thereof. v

2. A traveller for a ring twisting or spinning frame comprising a vertical member adapted to span said ring and having upper and lower flanges REFERENCES CITED The following references are of record in the file 01 this patent:

UNITED STATES PATENTS Name Date Carter Mar. 24, 1942 Number

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