US2580297A - Shuttle guide - Google Patents

Description

H. HOEBER Dec. 25, 1951 SHUTTLE GUIDE Filed March 26; 1947 IN VEN TOR.

Harold/ o e6 e1; fia c9 arse By Barbara 0. W //ae her and (/l/zY/z'am TFea 05 Ex 6 c Ara/01's BY ATTORNEYS.

Patented Dec. 25, 1951 SHUTTLE GUIDE Harold Hoeber, deceased, late of Dartmouth, Mass, by Barbara 0. W. Hoeber and William T. Read, executors, Dartmouth, Mass, assignors, by memo assignments, to Hoosac Mills Corporation, Boston, Mass, a corporation of Massachusetts Application March 26, 1947, Serial No. 737,315

4 Claims.

the picker or the shuttle may be so positioned in the shuttle box that the shuttle will be directed upwardly and thus might be thrown through the upper shed of the warp when the shuttle is picked. In other cases, the shuttle may tend to turn about'its longitudinal axis as it is being picked, or itmay move upwardly and then He'deflected downwardly byv the upper shed 'of the warp and the shuttle will follow'a zig-zag path across thevvarp and may enter the shuttle box improperly and fail to stop in the proper position therein. I

Accurate control of the shuttle, in looms operatingatja speed of '160picks per minute does not involve any problemf The shuttle is. picked out oithe shuttle box at relatively low speeds. For example, in a ls inch loom, the shuttle travels about 800 feet per minute. This speed is so low that in a properly adjusted loom, the shuttle will 'fol'low the shuttle race in a substantially straight path. 'M'odern high speed looms operate at speeds in excess of 190 picks per minute and the .shuttle speeds becomefqiiite high. "In a 44 inch'loom operating at 190i picks per minute, the shuttle travels about 950 feet per minute and when operating at 220 picks per minute the shuttle 'travel'is increased to about 1160 feet per minute. At these 'high speeds, even when the picker1o'arts are carefully and accurately adjusted, the'shuttle follows a zig-zag path across the lay. At low Speeds, even if the shuttle should start in a'zig-zag path, the warp woulddampen or elimin'at'e this 'zig-zag movement but, at high speeds, this movement often times issuffioiently great'to'break the warp or cause wear on the warp sufficient to cause excessive" warp breakage. n 'der looms, which operate at no picks per i heinitialspeed ofi'theshuttleis equally Li s in'theh igh 'speed narrower looms. ,w'id looms; iconti'olof the erratic flight anemones presented dilficult prob- "onetweet a the-=prsentiiiven'tibn is to an vide improved shuttle guiding means by the use of which the above mentioned difficulties will be avoided. To this end and in accordance with one feature of the invention, a shuttle guiding member is provided which is free to yield in one direction to permit an improperly positioned shuttle to enter and to be deflected into proper position in the shuttle box and which is arranged to be held against movement when the shuttle is picked out of the shuttle box and to direct the shuttle in. a substantially straight path across the warp and which may be moved to permit an improperly positioned shuttle to enter and to be properly positioned in the shuttle box.

Other objects of the invention are to improve generally upon the construction and operation of weaving looms.

With the above and other objects and features in view, the invention will now be described with particular reference to the accompanying drawings which illustrate a preferred embodiment of the invention and in which:

Fig. l is a view in front elevation of a lay in which the present invention is embodied;

Fig. 2 is a detail view showing an improperly positioned shuttle entering the shuttle box;

Fig. 3 is a view in section taken along the line III-III of Fig. 1;

Fig. 4 is a view in section taken along the line IVIV of Fig. 3; and

Fig. 5 is a perspective view of the shuttle deflecting and guiding mechanism.

The present invention is illustrated as applied to the usual type of automatic loom. In the drawings only the left hand end of the lay it is shown. The parts not shown are of usual construction and form no part of the present invention; 7

The lay it is provided with the usual metal lay end i2 having a usual picker slot for receiving a picker stick is having a usual picker 8 at its upper end. The lay end l2 forms the'bottom of the shuttle box in which the shuttle 23 is received. The shuttle box is provided with a front box plate 22 which is secured to the lay end i2 by usual capscrews 24. The front box plate 22 extends from a point inwardly of the inner end 25 ofthe lay end 12 and outwardly to a point just beyond the cap screw 24. The inner end of the front box plate is not shown since it is shown as cut away to permit a more detailed-showing of' other parts.

' The shuttle box is also provided with a back box plate 2% having a usual pivoted binder 28 which is arranged to engage the rear wall of the shuttle 20 and to check the same as it enters the shuttle box. The front and back box plates 22 and 26 are spaced apart a distance just sufiicient to permit the shuttle 28 to enter therebetween. The binder 28 is spring urged forwardly and is provided with the usual swell against which the shuttle acts to swing the binder about its pivot to operate the usual protector mechanism (not shown). The pressure of the binder 28 causes the shuttle 26 to bear against the front box plate 22 which is provided with the usual friction surface which acts in conjunction with the binder to check the shuttle 2c in the shuttle box. When the shuttle 20 is completely and properly boxed, the lower surface of the shuttle rests on the top surface of the lay end I2 forming the bottom of the shuttle box and the outer spur 30 of the shuttle 20 is received in a usual recess in the inner end of the picker IS with the picker stick 16 engaging a bumper 32 at the end of the lay. When the shuttle comes to rest in this position and the loom parts are properly adjusted to'provide a uniform pick and uniform boxing, the shuttle should always box properly in the opposite shuttle box.

Under some conditions, picking of the shuttle may be interfered with or its flight deflected. Conditions which control picking of the shuttle are usually within the control of the operator and may be remedied by proper adjustments of the loom parts but deflection of the shuttle during flight cannot be so readily controlled. Warp threads in the lower shed may extend substantially above the raceway and thus deflect the shuttle slightly upwardly or the picker itself may be defective which will, under some conditions, cause the shuttle to lope across the warp. It is desirable, therefore, to cause the shuttle to be picked across the warp without undue pressure against either the raceway or against the upper shed of the warp thus preventing excessive wear on the warp threads and insuring that flight of the shuttle will be substantially unimpeded and uniform for every pick.

To provide this desirable condition, the present loom is provided with a shuttle deflector and guide 34, which is fixed to the inner end portion of the back box plate 26. The deflector and guide 34 comprises a support 35 having a pair of openings for receiving cap screws or bolts 38 which secure the support 36 to the back box plate 26, or, if desired, to the sword. The support 36 is provided with an inclined portion 48 having a dovetail groove 42 therein which is arranged to receive a dovetail 44 formed on a movable member 28. A gib 48 is provided to take up whatever wear may occur between the groove 42 and the dovetail 44. Adjusting screws 58 are provided which extend through the side wall of the inclined portion 46 and project into the groove 2 and engage the gib 18. Check nuts 52 serve to maintain the adleather 53 may, if desired, be skived so as to be.

thicker adjacent one edge than at the other edge to accommodate shuttles having a higher back wall than front wall. The difference in thickness of the front and rear edges is, of course, equal to the difference in height between the front and rear walls of the shuttle.

The height of the lower surface of the member 46 is determined by the height of the shuttle. The lower flat surface ofthe leather 58 is positioned so that there is only sufiicient clearance between it and the top of the shuttle to provide for a running fit and the shuttle will be closely ment of the member 46 under the influence of the compression spring 66 which is interposed between the members 36 and 46. Thus, the height of the member 46 is accurately controlled by manipulations of the adjusting screw 60 which is locked in adjusted position by a check nut 68.

The member 46 is arranged to yield and to move upwardly when it is engaged by an improperly positioned shuttle. As shown, for example, in Fig. 2 of the drawings, the tip 30 of the shuttle 20 is raised sufliciently to engage the movable member 46 which is thus raised against the tension of the spring 66. The shuttle 20 is deflected downwardly and, by the time that it is completely boxed, it will be properly positioned therein. When the shuttle is picked out of the box and the picker parts are properly adjusted, the upper surfaces of the front and rear walls of the shuttle 20 will not engage the under surface of the leather 58. If, on the other hand, the picker I8 is too low, the leading end of the shuttle 20 V will rise and engage the leather 58; but since the movable member 46 has reached the limit of its movement in the direction of movement of the picked shuttle, the shuttle 20 will be forced to remain down against the lay end 12 until the shuttle is picked out of the box. Thus, the shuttle 20 leaves the shuttle box properly and tends to follow a substantially straight path until it is boxed in the opposite shuttle box. When the shuttle 20 has once entered the shed, the shuttle has sufficient momentum so that it is not readily deflected out of its normal path by occasional warp threads which may be positioned above the race-way in the lower shed of the warp.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent of the United States is:

1. In a loom, an oscillating lay, a shuttle box on said lay, a shuttle, means for picking the shuttle, said shuttle box having front and back walls and a bottom wall, and a guiding member positioned adjacent to the entering end of said shuttle box with a lower surface parallel to the bottom wall and means to movably mount said member to maintain its lower surface parallel to said bottom wall, said means controlling the movement of said member to cause its surface to remain stationary to direct and maintain the shuttle in position against the bottom of the shuttle box when the shuttle is driven out of the box.

2. In a loom, an oscillating lay, a shuttle box on said lay, a shuttle, means for picking the shuttle, said shuttle box having front and back walls and a bottom wall, and a guiding member positioned adjacent to the entering end of said' shuttle box with a lower surface parallel to thebottom wall and means to movablymount said member to maintain its lower surface parallel to said bottom wall, said means controlling the movement of said member to cause its surface to remain stationary to direct and maintain the shuttle in position against the bottom of the shuttle box when the shuttle is driven out of the box and to permit movement of said member out of guiding position as the shuttle enters the box.

3. In a loom, an oscillating lay, a shuttle box on said lay, a shuttle, means for picking the shuttle, said shuttle box having a bottom wall and front and back plates forming front and back walls spaced apart a distance sufiicient to permit the shuttle to enter without binding, a support fixed to the inner end portion of one of said plates, upwardly and outwardly inclined ways on said support, and a deflector member having a surface-substantially parallel to said bottom wall and slidably mounted on the ways of said support, said deflector member being normally spring urged to its lowermost position and being arranged to yield upwardly and outwardly to deflect an incoming shuttle and to be maintained in its lowermost position to maintain said shuttle against the bottom of the shuttle box when the shuttle is driven out of the shuttle box.

4. In a loom, an oscillating lay, a shuttle box on said lay, a shuttle, means for picking said shuttle, said shuttle box having a bottom wall and front and back box plates forming front and back walls spaced apart a distance sufficient to permit the shuttle to enter without binding, a support fixed to the inner end portion of the back box plate, upwardly and outwardly inclined ways on said support, a member having a guiding surface substantially parallel to said bottom wall, said member being slidably mounted in the ways of said support, cooperating adjustable stop means on said support and said member for limiting the downward and inward movement of said member, and spring means normally urging said stop means toward each other.

BARBARA O. W. HOEBER,

WILLIAM T. READ, Executors 0 the Estate of Harold Hoeber, De-

ceased.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 687,520 Draper Nov. 26, 1901 1,048,070 Heidel Dec. 24, 1912 1,167,369 Joncas Jan. 4, 1916 1,384,807 Robertson July 19, 1921 2,106,559 Tuten Jan. 25, 1938 2,171,729 Livermore Sept. 5, 1939 2,426,971 Kotteman Sept. 2, 1947

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