US2084549A - Shuttle - Google Patents

Description

ROWN

June 22, 1937.

INVENTOR. 634 EL 0. B/GOWN. BY

ATTORNEY.

Patented June 22, 1931 UNITED STATES PATENT OFFICE SHUTTLE ration of Maine Application July 1,

4 Claims.

The present invention pertains to automatically threading loom shuttles, and has more particular reference to the threading devices of such shuttles.

5 Shuttles of this type comprise a shuttle body containing an automatically replaceable filling carrier, a side delivery eye, and a threading block for guiding the running filling into the delivery eye during the first two picks after the 10 transfer of a filling carrier into the shuttle. The

threading block has a longitudinal thread passage and a horn which projects outwardly and rearwardly above thethread passage, the filling becoming threaded into the thread passage, beneath the horn, at the beginning of the first pick after transfer. The horn is intended to guide the filling into the side delivery eye at the beginning of the second pick after transfer. In view of the possibility of the filling becoming unthreaded from beneath the horn instead of threading into the delivery eye, it is desirable 7 that the shuttle be provided with thread engaging or guard means for preventing such unthreading.

The principal object of my invention is to prevent such unthreading by employing, in an automatically threading loom shuttle having a shuttle body, threading block and horn as aforesaid, a thread-engaging, guard wall which is formed integrally with the shuttle body and which extends under the horn in a manner to hold the filling from unthreading about a downturned end on the horn.

The aforementioned and other objects of the invention are accomplished by the construction illustrated on the accompanying drawing, of

which:

Fig. l is a plan view of the thread delivery end of a shuttle having my invention applied thereto; 40 Fig; 2 is a longitudinal sectional view taken approximately on line 2-2 of Fig. 1, but to a larger scale; and

Fig. 3 is a view in cross-sectiontaken'approximately on line 3--3 of Fig. 2.

The shuttle shown on the drawing comprises a shuttle body I 'having a longitudinal cavity 2 for reception of a filling carrier such as bobbin 3, and the threading instrumentalities hereinafter described in detail. The shuttle body is 50 provided with any conventional means (not shown) for releasably holding the bobbin in the cavity and permitting the bobbin to be automatically replaced by a fresh one whenever the filling supply becomes substantially exhausted.

The threading instrumentalities include a side 1936, Serial No. 88,437

delivery eye 4 formed in the front wall of the shuttle in the usual manner, and a suitable threading block for leading the filling into the delivery eye during the first two picks after transfer. The threading block is fixed in a recess 5 in the shuttle body and comprises a fioor 6, front and rear walls 1 and 8, respectively, a scroll 9, and a horn III which projects outwardly and rearwardly from the front of the threading block. Threading blocks having these characteristics are generally old.

The expressions denoting direction, as herein employed, are applicable to the shuttle when the latter is considered to be positioned in a loom and boxed at the side of the loom toward which the tip ll of the shuttle points. Thus, forwardly is in a direction toward the front of the loom and outwardly is in a direction from the cavity 2 toward the tip ll of the shuttle.

The shuttle is provided with a longitudinal thread passage defined in part by the recess 5 and in part by the walls and floor of the threading block. The horn I is located above the thread passage and extends rearwardly preferably to a point substantially in alignment with the rear wall 8 of the threading block. The rearward end of the horn is free and is turned downwardly as at I 2 into a depression IS. The depression is conveniently comprised of a channel formed in the shuttle body and extending longitudinally outwardly from the outer end of the recess 5. The channel is, preferably located or positioned rearwardly from the longitudinal axis of the thread passage, in alignment with the rear side of the latter.

The shuttle body is provided with a space, beneath the horn, which may be in the form of a slot I4, to receive the running filling during the first pick after transfer. This slot is located in front of the channel l3, and preferably forward- 1y from the longitudinal axis of the thread passage, the slot extending longitudinally outwardly from the outer end of the recess substantially in alignment with the front side of the thread passage. The channel and slot are separated by a longitudinal thread engaging wall l5 which extends beneath the horn Ill.

The wall I5, according to the present invention, is formed, integrally with the shuttle body and is at least as long as the width of the horn.

The wall is located in front of the down-turned end I 2 of the horn and projects to a height materially above said end. In the preferred form, as shown, the wall is located slightly forwardly from the longitudinal axis of the thread passage and ill in for reception of extends from the outer end of the recess 5 almost to the tip of the shuttle. The wall, to satisfactorily perform its intended function, should be at least long enough to extend from the inner to the outer side of the horn, andthe wall immediately beneath the horn must project materially above the down-turned end l2.

In the operation of the shuttle in a loom, a bobbin is transferred into the shuttle when the shuttle is boxed as above described. At such time, the filling end f extends from the bobbin outwardly and upwardly, over the threading block, to the usual fixed holder (not shown). Thereafter the shuttle is movedbodily rearwardly andthen picked toward the left, Fig. 1. As the shuttle is thus picked, the filling in unwinding from the bobbin rotates and balloons so that it passes downwardly behind the free end of the horn l0, forwardly beneath the down-turned end l2, and thence through the space between the underneath side of the horn and the top of the wall, to a position in the slot l4, Figs. 1 and 2. This threading of the filling into the thread passage and slot beneath the horn occurs early in the first pick after transfer and the filling continues to run in this path throughout the remainder of the pick. 1

After the shuttle is boxedat the end of the first. pick, it is moved bodily forwardly and rearwardly and then picked in the opposite direction. Such movements of the shuttle slacken the filling and permit it to loop, twist and kink. The thread engaging wall I 5 prevents the thus slackened filling from escaping about the rearward free end of the horn l0 and 'thus'insures the passage oi the filling down into the side delivery eye 4 during the second pick after transfer.

It is not broadly new to provide an integral thread-engaging wall to assist in the preventing of the escape of the filling from beneath the horn of a threading block. The novelty in the present construction includes the extending" of such wall beneath the horn at a height above the down-turned end of the latter. By this means, the filling is held forwardly from the rearward free end of the horn entirely by the wall, eliminating any openihgbetween the horn and the wall exceptthe spaceover the top of the wall. It will be apparent that the filling cannot escape about the free end of the horn by passing over the top of the wall.

Having fully disclosed the preferred embodiment of my invention, I claim:

:1. An automatically threading loom shuttle comprismg a shuttle'body having a cavity therea filling carrier, a threading block fixed in a rec'essin saidshuttle body, said threading block having a longitudinal thread pas sage communicating with'said cavity, said shuttle body having a longitudinal channel and a longitudinal thread-receiving slot extending outwardly from said recess, said channel being positioned rearwardly fromand said slot being positioned forwardly f om the longitudinal axis of said threadpassage, said threading block having a horn which projects from the front of the threadmg block outwardly and rearwardly above said slot, the rearward end of said horn being turned wnwardly into said channel, said channel and j d .8101 being separated by a guard wall formed m eg y with said shuttle body, said Wall extendlng beneath said horn. from the inner to the outer side thereof, said wall immediately beneathi said horn being spaced forwardly from saidi down-turned end and projecting materially above the same.

2. An automatically threading loom shuttle comprising a shuttle body having a cavity therein. for reception of a filling carrier, a threading: block having a longitudinal thread passage com municating with saidcavity, said shuttle body; having a depression formed. therein outwardly from said thread passage and a space forwardly from said depression in position to receive the running filling during the first pick after transfer, said depression and space being separated by a thread engaging wall, said wall being; formed integrally with said shuttle body and extending longitudinally thereof substantially in alignment with said thread passage, said threading block'- having a horn which projects from the front of the threading block outwardly and rearwardly" across said wall entirely above the same, the rearward end of said horn being free" and being turned downwardly into said depression at a point materially outwardly of the shuttle from the inner: end of said wall.

3. An automatically. threading loom shuttle comprising a shuttle body having a cavity therein for reception of a filling carrier, 2. threading.

block having a longitudinal thread passage communicating with said cavity, said shuttle body having a depression formed therein, said depres sion extending outwardly from said thread passage substantially in longitudinal alignment with the rearward side thereof, said threading block having a horn which projects from the front of I said depression being separated by a guard wall formedintegrally with the shuttle body, said wall ext'endingfrom a point inwardly of said horn beneath the latter to a point outwardly beyond the: same, said wall from'end to end thereof project ing materially above the down-turned end of said. horn.

4. automatically threading loom shuttle comprising a shuttle body having a cavity therein for reception of a filling carrier, a threading block fixed in a'recess in said shuttle body, said threading block having a longitudinal thread passage communicating with saidcavity and a horn which projects from the front of the threading block outwardly and rearwardly to a point substantially in alignment with the rear wall of said thread passage, the rearward end of said horn being .free and being turned downwardly, said shuttle body having an integral guard wall extending beneath said horn in front of said downturned end, said wall being at least as long as the width of said horn and extending to the opposite sides thereof, said wall immediately beneath said horn projecting materially above said downturned end, there being space about the free end of said horn and between the under surface of said .horn and the top of said wall to permit the running filling to thread to a position in front of d wall during the first pick after transfer.

D. BROWN.

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