US1568599A - Bow shuttle - Google Patents

Description

Patented Jan. 5, 1926.

' UNITED STATES 1,568,599 PATE OFFICE."

orr'ro HACKENBEBG, or-rnrnitsomwnw JERSEY.

Bow SHUTTLE.

' Application filed Jui fi, 1925. Serial No. 40,785.

Low shuttles for ribbon looms are usually constructed of wood, sometimes all in one piece but usually with the runner or body portion of one piece and the bow of another.

Such shuttles are weak and frequently frac-' ture' across the 'bow which it is necessary to carve out from a block of the wood; ,they require very skillful labor and a considerable amount of time to form them, particularly with respect to the shaping of the bow'and I fitting it to the runner; they are .unduly heavy and also thick in the bow, so that they begin in a short time to sag and cause wear of the shuttle grooves and the blocks in which the shuttles travel and they are likely to rub on the warp threads to a harmful extent; and their provision for guiding" the filling tension springs is such that the deli- Other holes 10 .are formed in the front face I cacy of action ofsuch springs is impaired. The object of this invention isto provide a bow shuttle which shall represent an improvei'nent on ordinary bow shuttles in all these respects. i

To this end I form the runner or body portion of the shuttle of wood, as usual, but

the'bow I form of a tough, grainless niatevery snugly; and one advantage of the rial, such as fibre, which is preferred because it is light in weight. My invention in part consists in a shuttle of the bow type having a runner and a bow secured thereto which is formed of a. strip of grainless material, as fibre, bent to the bow-shape. The invention further. consists in certain combinations of parts concerned with the joining of the bow to the runner and the-guiding of the tension springs for the filling. In the drawing,

Fig. 1 is an underneath plan of my im-;

provedshuttle, partly in section;

Fig. 2 is a front elevation thereof;

Fig. 3 is a top plan view; and

Fig. 4C a section on line 4-4, Fig. 2. g

The runner 1 of the improved shuttlemay have substantially the same form as the runner of the ordinary bow shuttle, its under side being formed with a longitudinal groove 2 having the usual toothed driving rack 2 and its top side having the longitudinal guide groove .3. The runner will usually be formed of hardwood.

' To form the how 4 I take a straight strip of fibre and bend it to the form of a bow,

preferablywith its end portions'approxi- 'inately perpendicular to the same plane. The ends'5 of these end portions are cut off smooth so as to coincide with such plane;

dowel holes 6 are formed in said end portions; holes 7 are formed through the end portions so as to converge with respect to each other; and certain other operations are performed on the bow (for the mounting of the filling package and guiding of the filling, as will appear), and it will be understood that it is not material so far as the invention itself is concerned whether these are done before the strip to form the bow is bent into shape or at any other stage in the operation of forming the finished shuttle.

Dowel holes 8 are formed in the front face of the runner to match the holes 6 inthe ends of the bow, and these and the said holes 6 receive dowels9, preferably of metal, whereby the bow is joined to the runner.

of the runner, each preferably between the These holes 10 and the holes 7 are made to guides for the tension springs of the shuttle. The dowels 9 and 11 of course fit the holes dowels .11 is that since they are bent they obtain a' good hold on theibow, the joint between the bow and shuttle thereby being very greatly reinforccd by them.

The holes 10 are counterbores of holes 12 which extend clear through the runner from front to rear. Through each such hole 12 and thecorresponding tubular dowel 11 extends a spiral spring 13 one end of which is secured in the usual way to the back of the shuttle by a brad l and the other end of which carries a ring guide 15 of a di aineter too great to enter the hole 7 The bends in the tubular dowels 11 are preferably gradual curves. Ordinarily these springs extend through holes formed longitudinally in the legs or end portions of the bow and emerging at the inner surfaces of such legs in such manner that each spring assumes a sharp bend where'it protrudes, wherefore the spring does not act for its full bow and the adjoining end of the runner. I

extent and the delicacy of the tension is im paired; an advantage in bending each dowel 11 in a curve is that the full length of the spring remains available.

The filling package 16 is arranged as'u'sual on a spindle 17 having one end 17 (Fig.2) bent off, this end being fitted to slot'18 in one leg of the bow and the other entered into a hole 19 in the other leg. In the arch of the bow is the delivery eye 20through which the thread A from the filling package extends after successively passing through the eyes or guides and a ringguide or eye 21 attached by a clip 22 to the bow. 23 is the usual brake device for the package.

Since the bow itself is of grainle'ss material it is very strong and is not susceptible of injury. It may be thinned down to whatever' extent required (see the front elevation, Fig: 2) so as to avoid as much as possible its rubbing on the warp.

By forming thebow from a strip of grainless material bent to bow form I avoid the labor incident to a molding operation and also the likelihood of such (molded) bow warping out of shape in course of time, which would certainly occur in the case where the legs of the bow are not greatly thickened up but for the sake of lightness are formed only thick enough to afford good dowel joints between the bow and runner, as herein illustrated.

()r'dinar'y bow shuttles are necessarily heavy in the bow, which causes such a wearing away of the shuttle grooves 2 and 3 and the corresponding'parts of the shuttle blocks in which they travel that the shuttles sag in Y time.

In bow shuttles. in which the runner and bow are separate parts joined together and the ends of the bow abut an exterior surface of the runner thefilling frequently c'atches 'what I claim and desire to 'secure'by Letters Patent is: V I

1. In a shuttle,the combination of'a runnor, a bow having its"endsadjoining the I runner, and a dowel fitted at one endin the runner and having its other end bent off and fitted in an end portion of the bow.

Thedevic'es 11, r

2. In a shuttle, the combination of a run her, a bow having its ends adjoining'the runner, and a dowel fitted atone end in the runner lateral of one end portion of the bow andliavin'g its other'eiid portion bent off and fitted into such end portion of the bow.

8. In a shuttle, the combination of a runner, a bow having its ends adjoining the runner,' and a dowel fitted at one end in the runner between one end portion of the bow and the adjoining end of the runner and its other end portion bent off and fitted into such end portion of the bow.

4. In combination, with a shuttle structure including a runner, a bow having its ends adjoining the runner and ahole therethrough emerging at an exposed surface of the bow and a tubular dowel fitted into said hole and into the runner and thereby joining the runner and bowya tension device arranged in the dowel and including a spring secured to the shuttle structure for tensioning.

5. In combination, with a shuttle structure including a runner a bow having its ends adjoining the runner and a hole extending through the bow from one exposed surface to a substantially opposite Xposed surface thereof and a tubular dowel having one end. fitted into th runner lateral of the bow and its other end bent off and fitted in said hole, tension device arranged in the dowel and including a spring secured to the shuttle structure for tensioning.

6. In combination, with a shuttle structure having a runner portion and a bow portion and a hole in the bow portion extending therethrough from one exposed surface to a substantially opposite exposed surface thereof and a tubular device having one end'fitted 'intothe runner portion lateral of the bow "po1't1on' an'd itso'ther end bentofi' and fitted in the crevices which in the use of the shut-- in said hole, a tension device arranged in said tubular device and including a spring secured to the shuttle structure'for tension I 7. In a 's'huttle5 the combination of a runher, a bow having its ends adjoining the runner and\' abutting an exterior surface thereof, and a guard bridging the angle'between one of the legs of the bow-and the adj acent end portionof'the runner and fitted into each of them. I

In testimony whereof I afiiX my signature.

' OTTO I-IAGKENBER'G.

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