US1975019A

US1975019A - Tensioning device for shuttles

Info

Publication number: US1975019A
Application number: US721408A
Authority: US
Inventors: Pavia Luigi
Original assignee: Individual
Current assignee: Individual
Priority date: 1934-04-19
Filing date: 1934-04-19
Publication date: 1934-09-25
Anticipated expiration: 1951-09-25

Description

KQ. m M ,RW w 9 E.L. .T w m 1 m M .@.kw um M S f H, 9 R a m o w m, M w @Y M w w n m. M. T .lv A nl.l Hwy .L h @n www@ Patented Sept. 25, 1934 rriiNsIoNINof DEVICE rolty sHUTTLEs i Luigi Pavia, Allentown, Pa.

Applicatinn April 1.9, 1934, seriai No. 721,408

4 Claims.

This invention relates to shuttles for looms and particularly to an improved tensioning device for maintaining the yarn under proper tension asA it leaves the shuttle, the object beingto provide a simple construction which may be used with yarns of different weights and which will function to produce the desired tension without danger of breakage.

Another object of the invention is to provide an improved tensioning device for shuttles on which means are provided which will not only secure the desired tensioning but which will clean the yarn immediately before it leaves the shuttle.

A further object, more specifically, is to provide a cleaning, rubbing and tensioning device for shuttles wherein wool or other brous material is positioned so that the yarn will be compelled to move therethrough and in doing so be held under tension as well as rubbed and cleaned.

In the accompanying drawing- Figure 1 is a top plan view of a shuttle with a tensioning device constructed according to the present invention applied thereto;

Figure 2 is an enlarged fragmentary sectional 25vv view through Figure 1 approximately on the line Figure 3 is a sectional view through Figure 1 on the line 3 3, the same being on an enlarged scale.

Referring to the accompanying drawing by numerals, 1 indicates a shuttle body of substantially the usual construction and provided with the usual cop 2 from which the yarn 3 is drawn through the eye 4 in the usual manner when the shuttle is used. The eye 4 shown in Figure 3 is really a tube of vitreous material with the outer end 5 set inwardly from the side 6 of the shuttle body so that the thread will not be pinched and may travel in the usual groove '7. Heretofore various forms of tensioning devices have been provided for tensioning the thread and these have operated with more or less success but require various adjustments in order to take either heavy or delicate threads.

In the present invention the tensioning device presented will take either heavy or delicate yarns and provide proper tensioning therefor Without causing breakage. In addition, the tensioning device according to the present invention will 50' smooth the thread or yarn and also clean the same immediately before it passes through the eye 4.

As shown particularly in Figs. 2 and 3 the tensioning device includes small strips of the skin 'of a furbearing animal, for instance, sheepskin,

the partsbeing arranged with a piece of skin or hide 8 on the pivotally mounted bar 9, and a strip 10y on the bottom of the-body 1. The strip 8 has the natural hair or fur 11 extending downwardly from the skin 12, which skin is secured to the plate or bar 9 by someY suitable adhesive.I The member 10 has the natural skin 13 secured to the body 1 by adhesive and, in addition, has side extensions 14 and 15 fitting into suitable grooves 16. The hair or fur 17 is cut away to form the extensions 14 and 15 though ample is left to ll the opening 18 from side to side. Preferably the hair or

fur

11 and 17 overlap somewhat as shown in Fig. 2 so that as the yarn 3 is pulled between these batches of fur there Will be produced a rubbing and cleaning action as Well as a retarding or tensioning action.

The plate 9 is pivotally mounted on a pin 19 and when in its lowered position rests upon a roller 20 carried by the pin 21. The plate 9 at the point where it surrounds the pin 19 is enlarged and formed with a cam face 22 adapted to coact with the plunger 23 normally urged outwardly by the spring 24 which is arranged in the bore or socket 25. The cam face 22 is of such a shape that when the plate 9 is in its lowered position there will be a continuous tendency to ho-ld the enlargement 26 pressing tightly against the roller 21. Also the face of cam 23 is formed so that when the plate 9 is raised to the dotted position shown in Fig. 2 it will remain in that position under the urge of the spring 24 acting on the plunger 23.

When threadingA the device, plate 9 is raised and with it member 8 is raised. The end of the yarn is then pulled from the co-p 2 and threaded through the eye e, after which the plate 9 is lowered. As the plate 9 reaches the point near the roller 23 it quickly snaps into position against the roller and is held in that position resiliently by the spring 24. After the yarn has been threaded as just described the shuttle is then ready for use, and as the shuttle moves back and forth in the loom the yarn is fed in the usual manner. As the fur cleans and smooths the yarn immediately before it enters the eye a desirable yarn is presented to the loom and, consequently, a more desirable piece of cloth is woven with the same yarn that would be woven if other forms of tensioning devices were used, As the yarn is rubbed i by the hair or wool all small strands are smoothed out and the yarn is straightened, whereby a very efficient filling is secured. After the cop 2 has become empty a new cop may be supplied in the 1 regular way and the yarn passed through the ico eye 4, plate 9 being raised during the threading operation.

I claim:

1. A tensioning device for shuttles, including a strip of sheepskin having natural fur thereon, means for securing the same to the body of the shuttle, a swinging plate carried by the shuttle, a strip of furbearing skin having fur thereon secured'to said plate and positioned to engage the other furbearing strip when the plate is in functioning position, said furbearing strips being positioned in the shuttle between the cop carried by the shuttle and the eye of the shuttle so that the yarn from the cop must pass through the tensioning device before it reaches the eye.

2. In a shuttle, a tensioning device oryarn as it passes from the cop to the eye, said tensioning device including a pair of furbearing skins positionedwith the fur overlapping atthe pointv where the yarn from the cop passes, whereby the yarn must rub against the furs as it passes to said eye and means secured to one of said skins for moving the same away from the other fur bearing skin.

3. In a shuttle, a thread tensioningdevice for tensioning the thread as it moves from the cop of the shuttle to the eye, said thread tensioning device including a pair of members formed principally of wool positioned normally to engage and rub said thread as it moves, a pivotally mounted plate, means for securing one of said members to said plate, said plate being adapted to be swung on its pivot principally outside of the body of the shuttle, said plate having at the pivotal end a cam, and a spring pressed plunger acting on said cam for holding the plate and said member in either an outer or an inner position.

4. In a shuttle, a tensioning device including a pivotally mounted plate, means for resiliently holding the plate in a position in the shuttle and also in a second position where the plate is arranged almost at right angles to the shuttle, a member having a wool face connected to said plate with the face extending downwardly when the shuttle is in use, and a second Wool member connected to the shuttle with the wool part eX- tending upwardly when the shuttle is in use, said wool members slightly overlapping along the path through which the yarn from the cop of the shuttle passes as it moves through the eye of the shuttle.

LUIGI PAVIA.