US2706500A - Loom shuttle - Google Patents

Description

April 19, 1955 A; V|| AN| 2,706,500

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AN'roNlo VILLAN ZJZ/ A TTORNE Y United States Patent O LOOM SHUTTLE Antonio Villani, Milford, Mass., assignor to Draper Corporation, Hopedale, Mass., a corporation of Maine Application July 2, 1954, Serial No. 440,950 4 Claims. (Cl. 139-196) This invention relates to loom shuttles and, more specifically, to a novel combined thread guiding wear plate and reinforcing bolt for such shuttles.

It is a general object of the invention to provide a shuttle reinforcing bolt and wear plate combination which shall be effective, less expensive, self-locking as to its position and which shall have less tendency to present or develop thread damaging projections, either at the plate or in the shuttle material adjacent thereto.

Another object is that of providing a self-locking plate and bolt combination which shall require simpler and more easily formed counterbores in the shuttle material with a more effective fit of the parts when assembled.

Another object is that of providing a basic wear plate and shuttle combination with which it becomes possible to pass the reinforcing bolt through from the front or the back while locking the parts effectively against displacement.

Other objects of the invention will become apparent from the following description.

Loom shuttles made from wood or other material usually have inset at one end a shuttle threading block of metal, filling threaded in said block being led out the front side of the shuttle through a side eye opening. Shuttles are usually grooved along the front wall so that the filling from the eye may be properly guided and protected. Of course the groove is aligned with the point at which the filling emerges from the eye.

The shuttle is reinforced an'd the block held in place by a cross bolt and the head or nut of this bolt, depending upon whether the bolt is inserted from the front or back, must be set in a suitable counterbore so as to be beyond contact with the lling. Normally such bolts pass through the shuttle at about the horizontal plane in which the groove lies. Some shuttles have been rovided with so-called wear plates at the front side w ich serve to reinforce or protect the shuttle material, both against the pressure of the bolt and the friction of the filling. These also purport to protect the filling itself against damage from cracked or splintered wood or other abrasions in the shuttle material at that locality. Examples of such plates are evident in U. S. Patents 2,140,- 060 and 2,493,568.

While these do protect the material of the shuttle to an extent, they are difficult to form, subject to bending and distortion, and of such shape that the indentation of the wood to receive them is difficult and expensively ac complished. In many instances the plate does not fit the cavity in which it is set and does not lie ush with the surfaces of the shuttle face with which it is supposed to conform. In such cases the filling may chafe or become caught or otherwise damaged, so that While these plates have much to recommend them, they are used only very rarely.

According to the instant invention, the above mentioned disadvantages are overcome. A wear plate of circular form is advantageously combined with a bolt passing eccentrically through the plate. This makes possible a firm anchorage for the bolt and assures that the plate must remain locked in its proper position with the notch or notches therein aligned with the groove and side eye of the shuttle.

Variations in form which the invention may take make it possible to insert a bolt through from the front or back of the shuttle and, if from the back, the bolt may thread into the plate itself or into a nut held against turning in the plate.

2,706,500 Patented Apr. 19, 1955 Mice The invention will be described in detail by reference to the accompanying figures of drawing wherein:

Fig. 1 is an elevation of a shuttle to which the invention has been applied.

Fig. 2 is a section horizontally of Fig. l showing details of one form the invention may take.

Fig. 3 is a similar view of another form.

Fig. 4 is a Vsection showing the wear plate of Fig. 2 to an enlarged scale.

Fig. 5 is a similar view of the modified plate of Fig. 3.

Figs. 6 and 7 are an elevation and section respectively of a third form.

Now referring to Fig. 1, a shuttle 10 has the usual spur 11, threading block 12 set in a suitable cut out in the shuttle end and a side eye 13 in the block through which filling is drawn as the shuttle passes through a warp shed. The filling is guided and protected by groove 14 extending along the length of the front wall of the shuttle. A bolt 15, Figs. 2 and 3 also, is passed through the shuttle including the block 12, and the head of this bolt, Fig. 2, is slotted for a screw driver and is also received within a counterbore 16 in the wear plate 17, Fig. 4. This plate is of such thickness as to permit a bolt head of reasonable thickness to be sunk into the counterbore beyond a point where there could be any danger to the filling running in groove 14 due to its engaging the bolt head. The bolt hole 18 and counterbore 16 are eccentric to the plate itself which is circular in outer contour. The outer periphery of the plate may or may not be serrated or otherwise roughened.

The shuttle itself is counterbored for the plate which should be inset to the extent necessary to assure that it is flush with the outer surface of the shuttle face. The hole for the bolt is, of course, eccentric to the counterbore the same amount as the eccentricity of the hole 18 in plate 17.

The plate is notched as at 19 and possibly at 20 in a line with the groove 14 when parts are assembled, these notches being of depth to blend in with the groove 14. The notch 19 is rounded as shown to form a smooth guiding surface for the filling as it comes from the side eye. At that eye the filling may pass about pins 21 or 22, depending upon the direction in which the shuttle is travelling.

The counterboring of the shuttle material for the plate is easily accomplished with accuracy since all work is circular; limits are easily attained and the fit excellent without any hand work at assembly. Thus a major objection to prior art attempts has been overcome, while the certainty of performance and cost factors are greatly improved. Once assembled by tightening bolt 1S into nut 23, the parts are very securely held and eccentricity of the bolt and plate prevent the latter turning whether the periphery is serrated or just loosely fitted into the counterbore in the shuttle material.

In Fig. 3 the bolt 15 is inserted from back to front of the shuttle and it then becomes practical to thread the bolt into the plate itself. For that purpose the plate may be made thick enough to thread for the desired distance to take a suitable length of the threaded end of the bolt, however, it permits more of the shuttle material to be left intact if a neck 24 is provided on plate 25 which may otherwise be similar to that first described. The construction is shown enlarged in Fig. 5.

In still another form, Figs. 6 and 7, the plate 26 is initially similar to plate 17 and, instead of inserting the bolt from the front, it is pushed through from the back and threaded into a nut held n the plate. This nut is serrated or otherwise so formed that in combination with a complementarily formed counterbore in the plate it is restrained against turning. The nut is of slightly less thickness than the depth of the counterbore in the plate. With this form of the invention it becomes possible to use a brass nut and thereby to get the added holding power against the bolts loosening.

It is to be understood that in each of the forms described the notches are formed as needed and that edges are rounded and smoothed so as to prevent any possibility of the filling being abraded or cut by its contact with either the plate, bolt or the shuttle material in which the plate is set.

The proportions and sizes of the parts may be rather widely varied and thegeneral characteristics are to be governed to an extent by the design of the particular shuttle to which applied. The plate rnay be pressed from sheet stock if desired in which event a socket or cup for a bolt head or nut is formed eccentrically of the plate itself during the pressing operation.

While one embodiment and modications of vthe invention have been disclosed, it is to be understood that the inventive concept may be carried out in a number of Ways. This invention is, therefore, not to be limited to the precise details described, but is .intended to embrace all variations and modifications thereof falling within the spirit of the invention and the scope of the claims.

I claim:

1. ln a loom shuttle having a threading block and a side delivery eye, a thread groove extending from said eye along the length of the face of the shuttle and a combined means for retaining said block in place in the shuttle and for guiding and taking the wear of the filling as it passes from the eye to said thread groove which comprises a circular plate inset in the face of the shuttle adjacent the side eye and aligned with said groove, a thread guiding notch in the face of said plate, an aperture eccentrically of said plate and a cross bolt passing through said aperture, shuttle and threading block.

2. In a loom shuttle having a threading block and a side delivery eye, a thread groove extending from said eye along the length of the face of the shuttle and a combined means for retaining said block in place in the shuttle and for guiding and taking the wear of the filling as it passes from the eye to said thread groove which comprises acircular plate inset in the face of the shuttle adjacent the side eye and aligned with said groove, a thread guiding notch in the face of said plate, a counterbore eccentrically disposed to said plate and a bolt hole concentric with said counterbore, and a cross bolt having its head in said counterbore passing through said bolt hole, shuttle and threading block.

3. In a loom shuttle having a threading block and a side delivery eye, a thread groove extending from said eye along the length of the face of the shuttle and a combined means for retaining said block in place in the shuttle and for guiding and taking the wear of the lling as it passes from the eye to said thread groove which comprises a circular plate inset in the face of the shuttle adjacent the side eye and aligned with said groove, a thread guiding notch in the face of said plate, a threaded aperture in said plate and eccentrically disposed thereto, and a cross bolt passing from they back of the shuttle through the threading block and being threaded into the aperture n said plate.

4. In a loom shuttle having a threading block and a side delivery eye, a thread groove extending from said eye along the length of vthe face of the shuttle and a combined means for retaining said block in place in the shuttle and for guiding and taking the wear of the lling as it passes from the eye to said thread groove which comprises a circular plate inset in the face of the shuttle adjacent the side eye and aligned with said groove, a thread guiding notch in 'the face of said plate, a counterbore eccentrically disposed to said plate and a bolt hole concentric with said counterbore, a nut retained against turning in o said counterbore and a cross bolt passing from the back of the shuttle through the threading block and being threaded into the said nut in the plate.

No .references cited*

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