US2294106A - Loom shuttle box - Google Patents

Description

Aug. 25, 1942. l w. H. BAHAN' LOOM 'SHUTTLE BOX Filed Ma y 24, 1 941 2 Sheets- Sheet 1 :m Y- m M m5 un 3 m n u 5 u. e n m H" a Aug. 25, 1942. w. H. BAHAN- LOOM SHUTTLE BOX Filed May 24, 1941 2 Sh eits-Sheet- 2 Enbentor: WILLIAM H. BFJHHN each time it enters Patented Aug. 25, 1942 UNHTED STATES PATENT OFFIQE LOOM SHUTTLE BOX William H. Bahan, Greenville. S. 0. Application May 24, 1941, Serial No. 395,041

2 Claims.

This invention relates to improvements in a shuttle box for looms and more especially to a novel means for applying friction to the sides of the loom shuttle as it enters the box.

In most conventional shuttle boxes, there is a tendency for the shuttle to rebound a certain amount after its momentum has been dissipated as a result of engaging the picker and the sidewalls of the box. The amount of rebound largely depends upon the tightness of the box and also upon how efliciently the box serves as a checking means. Therefore, it has been very difificult to stop the shuttle in the same position the box, thereby resulting in a variation in the impact delivered by the picker when the shuttle is expelled. This variation of impact often causes mispicks, pick-outs and other imperfections in the woven cloth.

.It is an object of this invention to provide a shuttle box which will effectively engage the shuttle as it enters the box and stop the same in practically the same position each pick of the loom. The box is equipped with an improved back binder capable of exerting an initial checking action as the shuttle enters the box and an increased secondary checking action when the shuttle progresses farther into the box. This increased secondary checking action serves to stop the shuttle upon each pick in the same position relative to the picker, thus insuring uniform impacts when the shuttle is expelled. The present invention also replaces the conventional check strap which encircles the picker stick at a point below the lay of the loom. This check strap has heretofore been employed to provide the secondary checking effect which is now incorporated by the applicant in the improved shuttle box.

It is another object of this invention to provide a shuttle box of the class described having a novel means for varying the width of the box and thus effectively controlling the checking effect offered to the incoming shuttle.

Some of the objects of the invention having been stated, other objects will appear as the de-- scription proceeds, when taken in connection with the accompanying drawings, in which Figure 1 is a plan view of one end of the lay of a loom illustrating my improved shuttle box;

Figure 2 is a front elevation of Figure 1;

Figure 3 is a rear elevation of Figure 1;

Figure 4 is a vertical transverse sectional view taken along the line 4-4 in Figure 3 Figure 5 is an exploded isometric view showing the parts which comprise the back of the shuttle box;

Figure 6 is an exploded isometric view observing the parts shown in Figure 5 from a different angle.

Referring more particularly to the drawings, the numeral [0 denotes the end portion of a loom lay having secured to the upper portion thereof a lay plate II. The lay ID has a longitudinal slot l2 cut therein, which slot coincides with a similar slot M in the race plate thereabove. In the slots l2 and I4, a picker stick I5 is adapted to oscillate back and forth to receive and expel a shuttle l6 into and from the shuttle box, the upper end of said stick having a picker l1 fixed thereon which serves to engage the nose of the shuttle in receiving and expelling the same.

The race plate II has mounted thereon, a suitable box front 20, said box front having a lining 2| covering one face thereof. This lining 2| forms one side of the shuttle box and is adapted to be engaged by one side of an incoming or outgoing shuttle I6. The box front 20 also has a horizontally extending flange 24 which rests upon the top of the race plate II, and serves as a base. This flange has suitable slots 25 near each end of the box front, which slots are adapted to have restricted portions 26 of bolts 27 penetrate the same. Each of the bolts 2! extends downwardly through the race plate and has a nut 29 threadably secured on the lower end thereof. By tightening the nut 29, the enlarged head portion 28 of the bolt 21 will be clamped down on top of the outstanding flange 24 of the box front 20 to thereby hold the box front in position on the race plate. The length of the slots 25 in the flange 24 is sufficient to permit the box front to be adjusted laterally of the race plate a substantial amount when the nuts 29 are loosened.

In order to hold the box front 29 in adjusted position, each of the bolts 2'! has a set screw 34 threadably penetrating the same. One end of each of the set screws is adapted to contact the intermediate portion of the box front 29 and thereby hold the box front in position against any outward pressure which might be exerted by the side of an incoming or outgoing shuttle Hi. It is therefore seen that this improved box front has means for clampingly adjusting the same into engagement with the top of the race plate and also means carried by the clamping means for holding the box front in the adjusted 2 position against lateral pressure exerted by the shuttle.

The lay I9 of the loom and the associated shuttle box is carried by a suitable loom sword 39. The upper portion of this loom sword oscillatably supports a dagger rod 49 upon which a suitable dagger 4| is mounted. The free end of dagger 4| moves back and forth with the lay and is held in an elevated position relative to a stopping mechanism, not shown, when the loom is functioning in the proper order. But when a shuttle fails to become properly boxed, the free end of this dagger will not and it will engage the stopping mechanism 'to stop the loom. The rod 49 is bent substantially.

at right angles to the longitudinal axis of the lay at a point beneath the shuttle box thus forming an end portion 49a, and on this bent end, a suitable upstanding lever arm 45 is fixedly secured by any suitable means such asset screws 45. The upper free end of thelever 45 is nor-- mally pressed into engagement with a suitable wearing surface 41 on the free end of a back binder 43, by means of conventional torsion spring 44 (Figure 3). The binder is pivoted at the outer end of the shuttle box to a bolt 49, said bolt having its lower end secured in the race plate II, and having its upper end secured in the outer end of back boxplate 50. This back box plate has its inner end secured to a shuttle box wall plate as at 52. The wall plate, in turn, is secured to the upper endof the lay sword 39 by means of a suitable bolt 53. When the shuttle box is empty, the free end of binder 49 is pressed against the outside of wall plate 5! by the upper end of lever 45. By observing Figures 1, 5 and 6, it will be seen that the inner end of the back binder 48, that is the end nearest the loom sword, has one face theteof lined with a suitable wearing surface 54, against which the side of the shuttle i6 is adapted to engage as it initially enters the shuttle box. It will also be noted that the back binder 43 has a vertically disposed hole 49a in one end thereof through which thebolt49 is adapted to fit when the'parts are in the position shown in Figures 1 and3. The back binder 48, excepting the modification hereinafter explained, is very similar to the conventional back binderin common use today on looms, except the length of the wearing surface 54 is substantially shorter than the wearing surface customarily employed.

The binder 48 has a recess 5'! out therein at a point intermediate its ends, which is adapted to receive the free 'endof a second pivoted binder broadly designated by the reference character 58. This binder 58 comprises a U-shaped'strap member 59' having a vertically disposed hole 69 in one end thereof, said hole being penetrated by a suitable shouldered bolt 6|. The lower end of the bolt 6| has a restricted portion Bia. which is threadably embedded in a bracket 62, said bracket 62 being secured to the side of lay I9 by means of bolt 63. The intermediate portion of the second pivoted binder 58 has a suitable wearing surface 65 secured to' the inside face thereof, that is the face which is disposed on the opposite side of the shuttle box from the linin 2| of the box front 29. This wearing surface 65 cooperates with the wearing surface 54 on the first-named binder 48. When the shuttle has moved all of the way into the shuttle box both of the linings or friction surfaces 54 and 65 engage one-side of the shuttle and press the same against the lining 2| of the box front.

be elevated sufficiently end of the spring .the loom sword 39 and normally rests upon the free end of the first pivoted member 48. The

In order to normally cause the free end of the second pivoted binder 58 to project inwardly through the recess 51 so that the wearing surface 65 will serve to retard the incoming shuttle, a suitable resilient means such as a leaf spring 66 has one end thereof secured to the free end of strap member 59 by any suitable means such as a bolt 61. This bolt 61 projects through the free end of the member 59, and the projecting end of the bolt is adapted to contact the outside of thefirst pivoted member 48 as at 48a when the free end of the second pivoted member 48 has moved inwardly the maximum amount. The free 66 projects inwardly toward intermediate portion of the spring 66 is connected to the intermediate portion of the member .59 by means of suitable bolt 69 and nuts 10. By the manipulation of the nuts 10, the amount of pressure initially exerted .by the free end of spring 65 upon the freeend of the first pivoted member 48 may be yaried.

It is thereforeseen that when the shuttle l6 moves into the shuttle. box to substantially the position shown in Figure l, the lining 54 of the first pivoted binder 48 will be engaged by .the base portion of the nose of the shuttle. This will serve as an initial retarding means to check the momentum of the shuttle. When the shuttle moves still farther to the left, than is shown in Figure l, the side of the shuttle will alsoengage the wearing surface .65 on the second pivoted binder 58. This wearing surface will serve as an additional checking means. Also when the shuttle engages the lining 54, the first pivoted binder 48 will be rotated outwardly away from the center of the shuttle box about its pivot point 49. When the shuttle is completely boxed, thesecond pivoted member will also be caused to rotate outwardly from the center of the box about its pivot point Gl. The outward movement of the second pivoted member will transmit additional pressure to the free end of thefirst pivoted member by means of the leaf spring 65. When it is desired to vary the amount of pressure transmitted by the spring, it is only necessary to manipulate the nuts 10 as stated above.

' In the drawings and specification, there has been set forth a preferred embodiment of the invention, and although specific terms are employed, they are used'in'a generic and descriptive sense only and not for purposes of limitation, the scope of the invention being set forth in the appended claims.

I claim:

'1. In a shuttle box for loom lays, said box being provided with a box front and a box back be.- tween which the shuttle is adapted to restwhen boxed, said box pack comprising a perforated binder pivotally secured to the lay and having its free end extending inwardly toward the m and having spring means acting thereon, for exerting lateral pressure upon theshuttle as it enters the box, a second binder pivotally secured to the lay and having its free end extending outwardly from the loom, the free end of said second binder being adapted to penetrate the perforation in said first binder and exert additional lateral pressure upon the shuttle after it advances to a predetermined point in the box, and means pivotally mounted on the lay for yieldingly transmitting the impact received by the second binder to the free end of the first binder.

2. In a loom having a lay provided with a shuttle box on each end for receiving the shuttle at each end of its travel, said shuttle box comprising a box front and a back binder said binder being pivoted at the outer end of the lay and having spring means normally urging the free end thereof inwardly against the incoming shuttle, said back binder having an opening therein in the end nearest its pivot, a secondary binder pivotally secured to the lay of the loom and projecting through said opening, spring means extending from the secondary binder to the free end portion of the back binder, whereby the pressure which is applied to the secondary binder by an incoming shuttle will be transmitted to the free end of the back binder to exert further pressure on the side of the shuttle to arrest the same.

WILLIAM H. BAHAN.

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