US2399851A

US2399851A - Shuttle check

Info

Publication number: US2399851A
Application number: US534733A
Authority: US
Inventors: Carl D Brown
Original assignee: Draper Corp
Current assignee: Draper Corp
Priority date: 1944-05-09
Filing date: 1944-05-09
Publication date: 1946-05-07
Anticipated expiration: 1963-05-07

Description

SHUTTLE CHECK Filed May 9, 1944 INVENTOR. FIG. 4 CARL D. BROWN BY 2 E I ATTORNEY Patented May 7, 1946 I we" orrics snoma cnacrr \a Carl D. Brown, liopedale, Mu... aaalgnor a Draper Corporation, llopedale, Mm, a corporatlon of Maine Application May 9, 1944, Serial No. 534,733

8 Claims. (Cl. 139-485) therefor.

The conventional shuttle box comprises front and back box plates and a binder pivoted to the back box plate, the binder being spring urged toward the shuttle to check the same at it enters the shuttle box. In such a shuttle box, the area of contact between the shuttle and the binder is quite small and hence, substantial spring pressure must be applied to the binder to check the shuttle in modern high speed looms. This expedient, however, has been unsatisfactory since it has caused abnormal wear on both the shuttle and thev shuttle engaging surfaces of the shuttle box.

, It has also been proposed to interpose a cushion of resilient material, such as rubber, between the front face of the binder and the usual shuttle engaging friction surface of the binder and thus increase the area of contact between the friction surface and the wall of the shuttle. 'While such constructions have been satisfactory in low speed looms, they have not been satisfactory in modern high speed looms since the pressure of the shuttle on the cushion is usually suflicient to compress the rubber beyond the breaking point. This, of course, necessitated frequent replacement of the cushion since the shuttle could not be properly checked after the cushion had begun to break down.

One object of the present invention, accordingly, is to provide a binder having a resilient cushion which is so mounted in the binder that it can be compressed only to a predetermined extent. To this end and as illustrated, the binder is provided with a pair of resilient rubber cushion members mounted in spaced parallel grooves formed in the front face of the binder and which normally project beyond the front face of the binder and which are of sufficient size to be pressed entirely into said grooves and wherein the front face of the binder operates as a stop to prevent excessive compression of the cushions.

With the above and other objects in view, the

invention will now be described with reference to' the accompanying drawing which-illustrates a preferred embodiment of the invention and in which:

Fig. 1 is a plan view of a shuttle box embodying the present invention and showing a shuttle in stopped position in the shuttle box;

Fig. 2 is a view similar to Fig. 1 but showing the shuttle entering the shuttle box;

Fig. 3 is a view in front elevation of the binder with the shuttle engaging friction surface removed; and

Fiz. 4 is a view in transverse cross section of the binder on a somewhat enlarged scale.

The loom to which the present invention is applied is of usual construction and the shuttle box illustrated in the drawing is secured to the left hand end of a lay "I. 1th; apparent, however, that the other end of the lay ll may be provided with a similar shuttle box.

The shuttle box comprises a front box plate II, a back box plate I4 and the bottom of the box is formed by the usual metal lay end It. The shuttle box is open at its inner end to permit a shuttle I! to be picked along the lay and into and out of the shuttle box by suitable picking mechanism comprising a usual picker stick 20 having a picker 22 secured to its upper end.

The shuttle box is provided with a pivoted binder 24 which is arranged to be engaged and moved by the shuttle as the latter enters the shuttle box. The binder is pivotally mounted at its outer end on pin 26 which is eccentrically mounted in the metal lay end it to permit adjustment of the binder. The binder is normally maintained in the position shown in Fig. 2 by a usual flat binder spring 28 which is fixed to the rear surface of the outer end portion of the metal lay end I. and extends inwardly and bears against the inner end of the binder. Thus, rear ward movement of the binder is resisted by the binder spring 28 but permits the binder to swin rearwardly, when engaged by the incoming shuttle, to operate the loom protection mechanism, of which only the protector finger 30 is shown.

The binder 24 is preferably formed of wood and is provided on its front or shuttle engaging face with a shuttle engaging friction member 32, preferably formed of leather. The front face of the binder is substantially straight throughout the greater portion of its length but the inner end portion thereof is slightly curved and inclined rearwardly to form a cam surface 34 engaged by the incoming shuttle to move the inner end of the binder rearwardly to operate the loom protection mechanism.

The front face of the binder 24 under the strap 32 is formed with a pair of spaced parallel grooves 36 which extend longitudinally of the binder and which terminate short or each end of the friction member 22. The grooves 36 are substantially deeper than they are wide and each receives a cushion 32 formed of soft resilient material, preferably soft rubber, although other materialsmchasneoprene"orotherqnthetic rubberlikematerialeouldbeuaedlfsodeslred.

'lliescftresilientcushionssl,asahowninl'ig.

4,aresubatantiallyinthefonnofatrapeaoid in croassection. Thebase ll'oi'thecushionis substantisllrequalin widthtothewidthofthe slots or grooves it. The height of the cushions above the base as is somewhat greater than the depth of the grooves It and the side walls 42 converge toward the top 44. The grooves 80 and the cushionsslaresorelatedinsiaethatthecushions 3| may be compressed into and flush with the top of the grooves 38 without, however, compressing the resilient cushion to the breaking point. In the illustrated construction, the cross sectional areas of the grooves II and the cushions 8| are substantially equal. Thus, the cushion will be compressed until the cushion is flush with the front face of the binder and the cushion will be distorted from its trapezoidal shape and will conform substantially to the shape of the groove 8|. The front face of the binder acts as a stop and prevents further and deleterious compression or the cushions ll. Thus, frequent replacement of the cushions is unnecessary.

It is to be noted, however, that the grooves 38 need not be rectangular in cross section not need the cushions be trapezoidal in cross section. The grooves and cushions may have any suitable cross section as long as the areas thereof are substantially equal. It is necessary, however, that the cushions ss extend beyond the front face of the binder to provide a resilient backing for the leather friction member 32. The pads or cushions is may be secured in position in the grooves 36 in any suitable manner but in the illustrated embodiment of the invention, the cushions 38 are held in the grooves 38 by the strap 32.

In operation the binder 24 will be engaged by the incoming shuttle and the binder will swing rearwardly to operate the loom protection mechanism. The shuttle, as it moves outwardly in engagement with the leather friction member 32, will compress the cushions 38 and the leather friction member 32 will conform to the shape of the entering end of the rear side wall of the shuttle throughout a substantial portion of the length of the facing 32. Thus, checking action on the shuttle is increased and rebound of the shuttle is prevented.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a loom, a lay having a shuttle box at one end thereof, a binder pivotally mounted on said shuttle box, said binder having a longitudinal recess therein, and a strip of resilient material seated in said recess and projecting beyond the face of said binder, said strip having a crosssectional area substantially equal to the crosssectional area of the recess, the said material being such as to be deformable by the action of the usual loom shuttle to substantially fill said recess.

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2.Inaloom.ashuttlebox,abinder mountedonsaidshuttieboxandhavinga lensitudinalrecessextendingfroniapointadiacen tothepivotandterminatingahortofita end-and astrip of resilient material seated in said recess and proiecting beyond the face of binder, said strip having a cross-sectional'area substantially equal to the cross-sectional area of therecess,thesaidmateriaibeingsuchastobe deformable by the action of the usual loom shuttle to substantially fill said recess.

3. In a loom. a shuttle box, a binder pivotally mounted on said shuttle box and having a longitudinal recess in its inner face, a covering of friction material on said face, and a strip of resilient material seated in said recess and forming a cushion for said covering, said strip pro- Jecting beyond the inner face of the binder and having a cross-sectional area substantially equal to the cross-sectional area of the recess, the said material being such as to be deformable by the action of the usual loom shuttle to substantially fill said recess.

4. In a loom, a shuttle box, a binder pivotally mounted on said shuttle box and having a plurality of spaced parallel recesses in its inner face, a friction covering on said face, and a plurality of strips of resilient material each seated in said recesses and forming a cushion for said covering each of said strips projecting beyond the inner face of said binder and each having a cross-sectional area substantially equal to the cross-sectional area of the recess in which it is seated, the said material being such as to be deformable by the action of the usual loom shuttle to substantially fill said recess.

5. A shuttle box for looms having a binder therein, said binder being formed of rigid material and its face recessed throughout the major portion of its length, a resilient shuttle engaging member fixed at both ends to the binder body and spanning said recess and a resilient pad positioned within said recess and having a cross-sectional area substantially equal to the cross-sectional area of said recess and projecting therefrom to provide a resilient backing for said shuttle engaging member, the material of said pad being such as to be deformable by the action of the usual loom shuttle to substantially fill said recess.

6. In a loom, a shuttle box, a binder of rigid material pivoted at one end to said shuttle box and having a plurality of spaced parallel recesses in its inner face, a strip of leather covering said face and secured to opposite ends of said binder, and resilient pads in each of said recesses projecting beyond the inner face of the binder and forming a resilient cushion for said cover, each of said pads being formed of resilient rubber and each having a cross-sectional area substantially equal to the cross-sectional area of the recess in which it is seated.

CARL D. BROWN.