US2081393A - Loom shuttle - Google Patents

Description

May 25 1937. c D BROWN 2,081,393

OOOOOOOOO LE NVENTOR.

OJEL D. ow/v.

i ATTORNEY.

Patented May 25, 1937 UNITED STATES DOOM SHUTTLE Carl D. Brown, Hopedale, 1Mass.,;assignor "to Draper Corporation, Hopedale, Mass., a. corporation of Maine Application July 1, 1936, Serial No. 88,438

. 1'Claim.

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

Shuttles of this type comprise a shuttle body containing an automatically replaceable filling carrier, a side delivery eye, a threading block, having a horn, for guiding the filling into the delivery eye during the first two picks after transfer, and a thread engaging member coop- .erating with thehorn to prevent the filling from escaping rearwardly about the horn'instead of threading into the side delivery eye.

The principal object of the present invention is to provide, in an automatically threading loom shuttle having a shuttle body, threading block and horn as aforesaid, a novel and improved member for preventing the unthreading of the filling, which member shall be formed of a strip of metal having one end secured to the shuttle by being inserted between the threading block and shuttle body.

A further object of the invention is to provide, in an automatically threading loom shuttle having such shuttle body, threading block and horn, a member for preventing the unthreading of the filling, which member shall be formed of a strip of metal bent into loops projecting to opposite sides of the horn as hereinafter claimed.

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

35 Fig. 1 is a plan view of the thread delivery end of a shuttle having my invention applied thereto;

Fig- 2 is a longitudinal sectional view taken approximately on line 2-2 of Fig. 1, but to a 40 larger scale; and

Fig. 3 is a View in cross-section taken 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 45 reception of a filling carrier, such as bobbin 3, and the threading instrumentalities hereinafter described in detail. The shuttle body is provided with any conventional means (not shown) for releasably holding the bobbin in the cavity and 50 permitting the bobbin to be automatically replaced by a fresh one whenever the filling supply becomes substantially exhausted.

The threading instrumentalities include a side delivery eye 4 formed in the front wall of the 55 shuttle in the usual manner, and a suitable threading block for leading the filling into the side delivery eye duringthe first two picks .after transfer, The. threading block is fixed ina 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 l0 whichprojects outwardly andrearwardly from ,thejront of, the threading block. Threading blocks having these general characteristics aregenerally old. I

The expressions denoting direction, as herein 10 employed, are applicable to the shuttle when the latter is considered ,tobe positionedinaloomand boxed atthe 'sideof the loom toward which the tip I I of the shuttlepoints. Thus, fforwardly is in adirection towardthefront of the loom,.and outwardly is in a direction from the cavity 2 toward the tip I l of the shuttle. a

The shuttle is provided with the usual longitudinal thread passage, which extends through the recess 5 and through the threading block. A longitudinal groove 12 is formed in the shuttle body, the groove extending outwardly from the recess 5 substantially in alignment with the thread passage. The horn I0 is located above the thread passage and groove and preferably extends rearwardly 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 at l3 into the groove l2. The shuttle is provided with a novel guard member for preventing the filling from unthreading rearwardly about the free end of the horn.

The guard member shown on the drawing is formed from a single rigid strip of material, preferably metal, bent to form oppositely projecting loops l4 and ill. The strip of metal may be rectangular in cross-section, and it is so shown on the drawing. The guard member is positioned entirely in the groove [2 and recess 5 beneath the horn, the member extending longitudinally of the shuttle approximately centrally of the groove. The loop l4 projects outwardly and the outer end of the strip is fixed in the groove by any suitable means", such as screw it, while the opposite loop I5 projects inwardly beneath the horn into the recess 5. The loops, and the connecting portion of the guard member, are positioned in front of the down-turned end l3 of the horn, there being, however, space in the groove in front of the guard member to receive the running filling during the first pick after transfer. The loops extend materially above the downturned end l3. The front surface of the guard member is, therefore, the thread engaging surface which prevents the filling from escaping about the horn.

It is not broadly new to provide a guard member, for the purpose described, formed from a strip of metal attached to the shuttle body. However, the oppositely projecting loops, and more particularly the loop I5 which projects into the recess 5, are novel. I have also provided a novel means for firmly securing the guard member to the shuttle. As shown more clearly by Fig. 2, the inner end of the metal strip is bent downwardly at IT, to conform to the outer wall of the recess 5, and thence inwardly along the fioor of the recess at I8, and is inserted between the bottom of the threading block and the shuttle body. Thus, the guard member is attached to the shuttle in such manner that it will not be dislodged by the shock and vibration incident to operation of the shuttle in a loom.

In the operation of the shuttle in a loom, a bobbin is transferred to the shuttle when the latter is boxed as above described. At such time, the filling end 1 extends from the bobbin outwardly and upwardly, over the threading block, to the usual fixed holder (not shown). Then the shuttle is moved bodily rearwardly and picked toward the left, Fig. 1. As the shuttle is thus picked, the filling in unwinding from the bobbin passes through the space about the down-turned end of the horn, upwardly between said end and the guard member, and thence to its running position in front of the guard member, wherein it is shown on Figs. 1 and 2. This threading of the filling occurs early in the first pick after transfer and the filling continues to run in this position throughout the remainder of the pick.

After the shuttle is boxed at 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 100p, twist and kink. The present form'of the guard member is particularly efficient in preventing the thus slackened filling from escaping about the rearward free end of the horn. The filling being prevented from unthreading, it passes down into the side delivery eye during the second pick after transfer.

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

An 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 and a horn which projects from the front of the threading block outwardly and rearwardly above said thread passage to a point substantially in alignment with the rearward side of the latter, the rearward end of said horn being turned downwardly into a longitudinal groove formed in said shuttle body, said groove extending outwardly from said recess substantially in alignment with said thread passage, and a guard member positioned entirely in said groove and recess, said member being comprised of a strip of metal bent into oppositely projecting loops one of which is fixed in said groove at a point outwardly from said horn and the other of which projects inwardly beneath said horn into said recess, said loops being positioned in front of and extending above said down-turned end of said horn, for the purpose described.

CARL D. BROWN.

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