US1394878A - Shuttle - Google Patents

Description

C. S. WRIGHT.

SHUTTLE.

APPLlcAlpN FILED Dec. 18, 1920.

Patented oet 25, 1921'.

I of Massachusetts,

UNITED STATES PATENT OFFICE.

SHUTTLE.

Specification of Letters Patent.

Patented Oct. 25, 1921.

Application led December 18, 1920. Serial No. 431,734.'

To all whom t may concern.:

Be it known that I, CHARLES S. VRIGHT, a citizen of the United States, residing at West Stoughton, county of Norfolk, State have invented an Tmprovement in Shuttles, of which the following description, in connection with the ac-- companying drawing, is a specification, like characters on the drawing representing like arts. p This invention relates to shuttles of that type used in automatic weft-replenishing looms wherein the replenishment of weft is effected by discharging the spent bobbin from the shuttle and substituting a fresh bobbin therefor. The invention has particular reference to the holding spring employed in the shuttle for holding the bobbin in the shuttle. In this type of loom the change of the bobbin in the shuttle is effected by means of a so-called transferrer which operates upon vexhaustion of the weft to drive a filled bobbin out of a hopperinto thel shuttle, and by this act to engage the spent bobbin in the shuttle and force the latter down through the open bottom of the shuttle. The bobbins are held in place in the shuttle by means of rings on the heels of the bobbins which engage notches formed in the holding spring, and in order to insure that the bobbin is properly placed in the shuttle, it is necessary for the transferrer to follow the bobbin in its transferring movement to a point where the .bobbin is correctly held by the'spring jaws. This involves the movement of the transferrer somewhat into the bobbin-receiving space in the shuttle. Furthermore, in order that the transferrer may have this extent of 'movement, it is necessary thatthe shuttle should be properly positioned during the transferring operation for if the shuttle is late in its entry into the shuttle box, there is danger that the transferrer will strike the shuttle and injure the latter. @ne of the objects of my invention is to provide an improved bobbin-holding spring which not only functions to hold the bobbin properly positioned after it has been transferred to the shuttle, but which also acts to complete the transferring movement of the incoming bobbin, thus relieving the transferrer of some work. lVith my improved spring it is suicient if the transferrer carries the bobbin down to a point where it is entered between the jaws of the spring, for after the bobbin has once been entered the spring acts to complete the movement of the bobbin and carry it home.

ence with my invention it is not necessary to give the transferrer as great an extent of movement as has heretofore been thought necessary. This allows me to have the movement of the transferrer occur at a later period than would otherwise be necessary, and thus a bobbin can be transferred into a' late shuttle without danger of injury.

Furthermore, less power is required to operate the transferrer where my invention is employed than is the case where the transferrer has to make the full extent of movement above referred to.

Other advantages are derived from using my invention which will be more fully hereinafter set forth.

In order to give an understanding of my invention, I have illustrated in the drawings a selected embodiment thereof which will now be described, after which the novel features will be pointed out inv the appended claims.

Figure l is a plan view of a portion of a shuttle having a shuttle spring embodying my invention; Y

Fig. 2 is a section on the line 2-2, Fig. l, showing the bobbin in position;

Fig. 3 is a section also on the line 2 2, Fig. l, showing the operation of placing a fresh bobbin in the shuttle equipped with my invention;

Fig. 4 is a view of one of the jaws of the spring;

Fig. 5 is a section on the line 6-6, Fig. 1.

In the drawings, l indicates a portion of a shuttle body having the usual bobbin-receiving slot or opening-2. formed therein, and 3 indicates a bobbin in the shuttle-which is formed with the butt or heel end 5 that is received in the holding Spring, said heel of the ybobbin having the usual metal rings 4 encircling the same.

My improved bobbin-holding spring is of the usual forked type, it having the two resilient arms 6 between which the heel of the bobbin is received, said arms having notches 7 formed therein to receive the rings 4 on the bobbin.

In order to obtain a better understanding of the invention, it may be helpful at this time to refer to the action of the ordinary holding spring when a Ybobbin is being transferred into the shuttle. This is illustrated in Fig. 5 wherein the arms ofthe holding` spring are indicated at 8. 9 indicates the transferrer which is constructed to move downwardly toward the shuttle during the change of bobbin and which operates to take a bobbin from the hopper and carry it into the shuttle and force the heel of the bobbin between the arms 8 of the holding spring. The entrance of the filled bobbin into the Shuttle will eject the spent bobbin. In order to insure that the lled bobbin is properly positioned in the spring it has heretofore been necessary to give the transferrer a movement suiiicient to place the lilled bobbin completely in the bobbinholding spring. If the movement of the transferrer stops short of this movement with the bobbin only partly entered between the arms of the spring, there is danger that the bobbin will snap out of the spring when the transferrer retreats. The carrying of the transferrer clear into the shuttle, re-

.v quires that the shuttle should be properly lpositioned during the transferring operation, for ifl when a change of bobbins is to take place the shuttle is Slow in being boxed, or is what is commonly termed a late shuttle, the transferrer will carry the filled bobbin against .the end of the shuttle instead of into the bobbin-receiving space 1n the shuttle thereby causing more or less damage.

As stated above, my improved bobbinholding spring is constructed so that itv has apositive action on thebobbin in forcing thelatter home, so that the transferrer may be relieved of that much work.4

The arms V6 of my bobbin-holding spring are made ofincreased width, as shown in Figs. 2, 3 and 1, so that there is av considerable space between the Anotch-es 7 and the top of each arm. The upperk portion of the inner face of each arm is curved inwardly slightly, as shown at 10, and the upper edge of each arm is beveled, as shown at 11. This forms a ridge or shoulder 12 on the inner face'of each'arm adjacent the upper edge.

Each arm is also extended below the notches 7, as shown at 13, and the extended portion 13 isl curved inwardly slightly, as best seen in Figs. 2 and 3. The vertical dimensions 0f each arm 6 at thenotched portion thereof is such that when a fresh bobbin is being' placed in the shuttle the spent bobbin will notbe carried outV frombetw'een the arms 6 until the center of the incoming bobbin has been car,- ried below the ridges or shoulders 12, as seen in Fig. 3. After the incoming bobbin has reached the position shown in Fig. 3 and the ridges or shoulders 12 are situated above the horizontal diameter, the resiliency of the spring will have the effect of forcing the incoming bobbin down intoV the position shown in Fig. 2. This is because the pressure of the springs against the rings 4 due to the resiliency of the springs forces the ridges or shoulders 12: against the rings above the center of the bobbin. 1With my invention, therefore, it is sufficient if the transferrer 9 carries the incoming bobbin to the point shown in Fig. 3, andthen leaves it, for after the shoulders 12 have been carried above the horizontal diameter of the bobbin, then the spring will act to prevent the bobbin from jumping out from the shuttle and will serve to force the bobbin downwardly into its proper position. It will thus be obvious that with my invention the transferrer may have a considerable less eX- tent of movement than with other bobbinholding springs as now commonly used without danger that the bobbin will fail to be carried home. An advantage which results from this construction is that it is possible to delay the action of the transferrer somewhat, for since it does not have to make a movement of so great an extent as heretofore, it is possible to have the transferrer commence its movement a little later. This will accommodate any late shuttle and will yet. insure that the transfer of the bobbin is properly effected. Another advantage which is inherent in this construction is that the movement of the transferrer in transferring a bobbin from the hopper to the shut-AV tle does not tend to draw the bobbin against the side of the shuttle because of the 'fact that the downward or transferring motion ofthe transferrer terminates at about the position shownY in Fig. 3.v This transferrer v has an oscillating movement about a center and at the time it reaches the point shown in Fig. 3, the face of the transferrer which is against the bobbin is about on the horizontal line of the center. Any motion of the transferrerbelow this horizontal line would carry the face slightly toward the shuttle due to the arc-,shaped path in which the face 110 moves, but because the transferrer terminates its motion on vthe horizontal line of the center orV motion there is no tendency to swing. thebobbin inwardly toward the side of the shuttle. j

It will be noted that in my invention the upper edges of the widened portions of the arms 6 aresituated just below thetop face of the shuttle so that as soon as the bobbin has entered the shuttle to the extent shown120 in Fig. 3 said bobbin is in position to be forced home by the resiliency of the springY arms. It will also be noted that the distance between the upper andlower edges of the widened portion of the spring arms is at 125 least as great as Vthe diameter of theheel of the bobbin. Y .a

15 indicates the usual ,guide member which is employed to assist in guiding the bobbin into the jaws of the bobbin-holding spring. 13(

In my invention I ymake this guide with the curved portion 16 instead of with a straight angular portion as is usually done, I find that with such a curved portion the bobbin is guided into position with an easier movement.

I claim:

l. A shuttle having a bobbin-receiving recess and a forked bobbin-holding spring, the arms of the spring having relatively wide. ends, the upper edges whereof are only slightly below the top of t-he shuttle, said arms being provided with notches to receive the rings on the bobbin heel and being curved inwardly from the notches to the upper edges, each arm having a beveled top edge which forms with the inward curvature ar ridge or shoulder closely adjacent the top edge of the arm whereby when a bobbin has been carried into a shuttle sufficiently so that the horizontal diameter of the heel is below the shoulder or ridge, the resiliency of the spring arms together with the curvature thereof will force the bobbin heel into the notches.

2. A shuttle having a bobbin-receiving recess and a forked bobbin-holding spring, the upper edges of the arms of the spring being only slightly below the top of the shuttle, each arm of the forked spring having a relatively wide end provided with notches to receive the rings on the bobbin heel, the portions of each arm above and below the notches being curved inwardly and each arm having on its inner face adjacent its top edge a ridge or shoulder which is located from the bottom edge of said wide end a distance at least as great as the diameter of the heel of the bobbin, whereby a bobbin being introduced into the shuttle will have its horizontal diameter carried below the ridges before the spent bobbin has been ejected from the shuttle.

In testimony whereof I name to this specification.

CHARLES S. WRIGHT.

have signed my

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