US2443876A

US2443876A - Bobbin chute for looms

Info

Publication number: US2443876A
Application number: US703073A
Authority: US
Inventors: Richard G Turner
Original assignee: Crompton and Knowles Corp
Current assignee: Crompton and Knowles Corp
Priority date: 1946-10-12
Filing date: 1946-10-12
Publication date: 1948-06-22
Anticipated expiration: 1965-06-22

Description

June 2 2, 194s. R, G, TURNER 2,443,876

BoBBIN CHUTE FORv Looms Filed 001'.. l2, 1946 FIGZ 5 INVENTOR NICI-[AWD 6. TURNER ATTORNEY Patented June 22, 1948 BOBBIN CHUTE FOR LOOMS Richard (Si.` Turner, Worcester, Mass., assignor to Crompton & Knowles Loom Works, Worcester, Mass., a corporation of Massachusetts Application October 12, 1946, Serial No. 703,073

along a bobbin chute toward a bobbin receiver or can. It is important to prevent damage to the tip of the bobbin, since the weft unwinds over it during the weaving operation. The butt of the bobbin is much stronger than the tip and has no contact with the weft. As bobbin chutes have been constructed heretofore however they have directed the expelled bobbins forwardly in such a manner that the tip could strike the front wall of the bobbin can before the butt end and be damaged.

It is an important object of my present invention to provide a bobbin chute having a forwardly concavesurface for the bobbin butt and another surface for the bobbin tip, and wherein the surfaces -are so related that at the instant the bobbin leaves the `bobbin chute its butt is moving in a direction having a forward component greater than the forward component of the tip.

It is another object of the invention to provide a bobbin chute having a concave surface on a butt deflector and to which is secured a bobbin tip guide having a straight tip engaging surface which at its upper and lower ends coincides with the concave surface but` is forward of the concave surface intermediate its ends.

With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth.

In the accompanying drawings, wherein a convenient embodiment of my invention is set forth,

Eig. 1.is a side elevation of a forward part of the loom having my improved bobbin chute applied thereto,

Fig. 2 is an enlarged view looking in the direction of diagonal arrow 2, Fig. 1,

Fig. 3 is a vertical section on line 3-3 of Fig. 2, and Fig. 4 is a view looking in the direction of arrow4, Fig. 1.

rReferring particularly to Fig. 1, the loom frame I supports a reserve bobbin magazine part of which is indicated at M. Reserve bobbins are transferred one at a time from the magazine into a shuttle S when the latter is in the shuttle s claims. (c1. 139-255) box II carried by the lay I2 of the loom. Transferrer arm I3 is part of the magazine andduring replenishing operation descends to insert a full bobbin indicated at I4 into the shuttle and at the same time` expels the depleted bobbin I5 from the shuttle. Incident to the transferring operation the depleted bobbin is discharged downwardly and is guided by a chute designated generally at C toward a bobbin receiver or can I6 which may be of any approved form. Bobbin chutes may either be carried by the lay or have stationary supports, but in the present instance the bobbin chute C is shown as attached to the l-ay since this is the more usual construction in weft replenishing looms. The bobbin can I6 will have a front wall I'I against which the bobbins are directed and from which they fall toward the bottom of the can.

The matter thus far described is of usual Vconstruction except the chute C as will be pointed out hereinafter.

The chute comprises a rigid plate 20 which may be made of cast iron and secured to the lay under the shuttle box I I and swing back and forth with the shuttle box as the lay reciprocates. Secured to plate 2l) is a bobbin butt deflector 2| which may be made of sheet metal and be attached to plate 20 as at 22. The deector need not necessarily be made of sheet metal, but has a surface 23 which is .concave as viewed from the front of the loom so that it curves downwardly and forwardly from an upper part thereof to the bottom. The left side of deflector 2l extends along a forwardly projecting bobbin butt guiding ange 2li formed as part of chute 20, see Fig. 2.

As shown in Figs. 2 and 3 a bobbin tip guide 25 is secured to the deflector 2I by screws or the like 26. The reason for this construction is to permit the delector and guide to be made as a complete unit and then attached to the plate 20, although the particular means by which the bobbin tip guide derives its support from the plate 20 is immaterial.

The tip guide 25 has a tapered upper end 30 and a similar tapered lower end 3l, while the intermediate part thereof designated at 32 is relatively thick so that the surface 33 of the guide which engages the bobbin barrel either at or near its tip will be forward of the concave surface of the deflector at points intermediate the tapered ends of the guide 25. As shownmore particularly in Fig. 3, the lower end of the guide 25 terminates at the bottom of deector 2|, but this relationship is a matter of choice, and the guide 25 can if desired project beyond the bottom of the deflector, but it is not desirable that it terminate very far above the lower end of the deflector. The upper part of surface 33 terminates either at or close to the upper end of the concave surface 23 so that the bobbin in its descent will glide onto the surface 33 without an abrupt movement of the bobbin tip.

In operation, 'the :expelled bobbin will descend with its `.buttA B and tip T moving down along the upper part of the plate ED. The butt then engages the concave surface of the deector 2i and moves downwardly along the latter in a path behind the surface 33 along which the 'tip end of the bobbin moves. As the butt approaches the bottom of the deector the lower end of surface 23 causes the bobbin. butt to be delivered 4'from the bottom of the deector in a forward anddownward direction designated by arrow b, Fig. 3. Simultaneously, that part of the bobbin Aeither at or adjacent to its tip T leaves the bottom of surface 33 moving in thedirection of arrow t, Fig. 3. The arrows` b and t are respectively tangential to surface 23 and a continuation Aof surface '33.

.Assuming that both butt and tip of the bobbin are moving at the same rate the butt will tend to lead or be in advance of the tip and strike the front wall il of the can i6 before the tip endl strikes the wall H. The tip thereafter strikes the wall il with a much reduced force and for this reason is subject to much less damage than has been the case in bobbin chutes as heretofore constructed.

The bobbin chute set forth herein can be used with any typeof bobbin receiver, such'as the usual galvanized sheet iron can, but it has particular advantage when used with `a type `of `multi-conipartment bobbin receiver set forth in my copend ing application Serial No. 703,074 filed 'on even date herewith, now Patent No."2,-28,'251. In that lapplication the chute is claimed 'combination with "the particular form of bobbin receiver set foiththerein. Since the advantages ofthe bobbin chute are not restricted to use with a cloth or multi-coinpartrnented bobbin receiver, the bobbin chu-te itself is claimed in this present application. l'

From the fore-going `iirwill be seen that I have provided a simple form of bobbin chute so iconstructedy that at the instant a bobbin fleaves it the butt is moving in a direction. having a greater forward component than that of the bobbin tip, and the lresult of this differencein rates of movement causes the butt of the bobbin to strik-e the bobbin can first and thereby reduce the forcewith which the bobbin tip strikes wall il later. It will be seen that this result is accomplished by providing the bobbin butt deector with surface 23 which is concave 'as viewed from the front of the loom and providing the bobbin tip or barrel guide 25 with a surface 33 which extends for the greater part of 'its extent 'along a path forward of surface 23. The two

surfaces

23 and 33 in effect produce 4a twisting of the vdescending bobbin resulting in forward movement ofthe bobbin -buttrelatively to the tip. rThe surface 33 need not necessarily be straight as shown, but Vit is desirable that its intermediate zparts zbetween 'theends 30 'and 3l be forward of the corresponding -parits of the surface It also desirable that the Ilower end 3l of the guide 25 vterminate approximately at the vbottofrnof the concave surface 23 so that the bobbin butt and tip 'may leave the chute :at approximately the saine time and at the instant when they are moving .forwardly alt different rates.

Having thus described my invention it will be seen that changes and modifications may be made therein lby those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is:

l. In a weft replenishing loom having a shuttle box from which -a bobbin is discharged during a. replenishing operation toward a bobbin receiver, a bobbin chute under the lay having a concave bobbin butt engaging surface and having a Second surface for engagement with the .bobbin between the butt and tip thereof, both of said surfaces lextending downwardly and forwardly and the first surface being soy related to the second surface as to cause the butt of the bobbin when the latter leaves the chute to travel forwardly at a rate greater than the rate at which the tip of the bobbin moves forwardly.

2. In a weft replcnishng loorn having a shuttle box from which a bobbin is discharged during a replenishing operation toward a bobbin receiver7 :a bobbin chute under the shuttle boxhaving two laterally `spaced surfaces one of which is concave with respect to the front of the loom and positioned to engage the butt of the bobbin and the other of which is substantially straight and inclined downwardly and forwardly and positioned to engage part of the bobbin adjacent to the tip end thereof, said two surfaces effective when the bobbin leaves the chute to cause the butt end of the rbobbin to move forwardly at a. rate greater than the rate at which the tip end of the bobbin moves forwardly.

3. In a weft replenishing loom having la shuttle box from which a bobbin is discharged during a replenishing operation toward a bobbin receiver, a bobbin chute under the shuttle box having a surface to engage the bobbin butt vand having a econd surface to engage the bobbin between the butt and tip thereof, said surfaces -being so constructed and related to 'each other lthat as a bobbin descends along the chute the butt end thereof moves forwardly i-n a curved path concave from the front of the loom, while 'the tip moves ydownwardiy and forwardly along a substantially straight path.

4. In a weft replenishing loom having a shuttle bon from which a bobbin is "discharged Lduring a :re-plenishing operation .toward a bobbin receiver., a bobbin chute under the shuttle box having arde-fe ilector formed with a bobbin butt engaging surface concave with respect to the front of the loom, a bobbin barrel engaging guide having a barrel engaging surface which extends downwardly and forwardly, the upper and lower ends of said vsurface :being substantially coincident with said concave |su-rface andthe intermediate part of the barrel engaging surface being forward of that part of the Vconcave surface between the top and bottom of the guide, said surfaces effective to cause the butt yof the bobbin to -move forwardly at a given rate and the -tip of ythe bobbin to move forwardly at a lesser' rate when the bobbin-'leaves the chute.

5. In a weft replenishing loo-m having a shuttle box from which a bobbin is ydischarged during a replenishing operation toward a bobbin receiver, a 'bobbin chute under the shuttley box having two surfaces directed downwardly and forwardly, one surface being concave Iand for the butt of the bobbin and :the other surface being substantially straight and for the barrel of the bobbin, said surfaces effective to engage their respective Aparts of the bobbin as the latter is discharged and descends along the chute and causing the butt of the bolobin to move forwardly relatively to the tip of the loo-lobin `as the descending bobbin approaches the bottom of the chute.

6. In a weft replenishing loom having a shuttle box from which a bobbin is discharged during a replenishing operation toward a bobbin receiver, a loobbin chute under .the shuttle box having two surfaces directed downwardly and forwardly, one surface for the butt `of the bob-bin and the other surface for the barrel of the bobbin, said surfaces eective to engage their respective rparts of the bobbin as they latter is discharged and descends yalong the chute and twisting the hobbin in such manner as to cause the Iloutt and tip to lmove 15 forwardly at different rates. the greater of which is that of the butt as the bobbin leaves the chute.

RICHARD G. TURNER.

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

UNITED STATES PATENTS 10 Number Name Date 885,021 Crompton Apr. 21, 1908 1,485,911 Ellis Mar. 4, 1924 2,376,738 Turner May 22, 1945 2,379,539 Nichols July 3, 1945