US2146973A - Picker stick check for looms - Google Patents

Description

Feb. 14, 19 39.

S. R: MILLER ET AL PICKER STICK CHECK FOR LOOMS Filed July 15, 1957 2 Sheets-Sheet 1 5A NDY li y/LL51? l lcme M. BREE/ER Feb. 14, 1939. s. R. MILLER ET AL PICKER STICK CHECK FOR LOOMS Filed July 15, 1937 2 Sheets-Sheet 2 iitiu k P -$4Nu-r R MILLER Patented Feb. 14, 1939 UNITED STATES PATENT OFFICE PICKER STICK CHECK FOR LOOMS Application July 15, 1937, Serial No. 153,813

Claims.

This invention relates to a picker stick check r for looms and more especially to a check which comprises a friction clutch having projections extending therefrom into the path of travel of the 5 picker'stick, one of said projections being engageable by the picker stick on its backward stroke and the other being engageable by the picker stick on its forward stroke, whereby the momentum of the backward stroke of the stick is checked upon each pick of the loom. The projection which is engaged upon the forward stroke of the stick merelyrestores'the friction clutch to nor- 'mal'position' so that the other projection will be properly positioned for the next backward stroke of the stick. Heretofore, in many instances, a conventional picker stick strap has been used for checking the momentum of the picker stick after the shuttle had engaged its picker. Since it was necessary to make these straps from comparatively flexible material such as leather or fabric, the point where the picker stick engaged the strap had to be substantially re-enforced in order to take care of the wear and prevent short life. Also, there has been great difficulty in maintaining a constant friction between the overlapping edges of the conventional strap since the strap would absorb humidity within the mill and as a result,the yield point of the strap would vary from day to day. Due to such reasons, the conventional check strap is, to a certain degree, unsatisfactory, and therefore shows the necessity of providing an improved check which may be easily adjusted, simple in operation and quickly installed.

It is therefore, an object of this invention to provide a picker stick check for looms having a I pair of projections extending outwardly from a friction clutch, one of 'said'projections being engageable by the stick upon its backward stroke to absorb the shuttle impact and the other projectionbeing engageable upon the forward stroke of the picker stick to restore the friction clutch to normal position as the shuttle is expelled from the box.

Some of the objects of the invention having been stated, other objects will appear as the description proceeds when taken in connection with the accompanying drawings, in which:-

Figure 1 is a plan view of one end of .the lay of a loom showing the invention secured thereto;

Figure'Z is an elevation looking at the bottom side of Figure 1; V

'Figure 3 is an isometric view of the improved picker stick check; i

Figure 4 is a transverse, sectional view taken along the line 4-4 in Figure 3;

Figure 5 is a sectional, plan view taken along line 55 in Figure 2 showing the position of the picker stick and check at the termination of its extreme backward stroke;

Figurefi is a bottom plan view of the check looking upwardly, and taken along line 6-6 in Figure 2."

Referring more specifically to the drawings, the numeral I0 denotes one end of a conventional loom lay, which has secured to the upper portion 7 thereof a lay plate I l, and upon this plate is secured a box front l2. Also, pivotally secured to the lay as at i3, is a pivoted binder l4 whose face is substantially parallel to the face of box front [2; Between the box front l2 and the pivoted binder M, a picker stick l6 projects upwardly, said stick having a conventional-picker ll secured on the upper end thereof. The picker stick l6 oscillates back and forth in slot l8 which is cut in the lay l0 and the lay cap plate I I.

Due to the fact that the shuttle enters the shuttle box between the box front 12 and the pivoted binder M at a very rapid rate, it is necessary to provide means for checking the picker stick l6 when the shuttle contacts the picker and moves it to the left in Figures 1 and 2. Otherwise, the impact delivered to the picker stick I! by the shuttle would force the picker stick l6 back against the extreme left-hand portion of the slot l8 and. increase the wear and breakage of the parts. In order to provide the proper checking apparatus, a suitable U-shaped bracket 25 has its upper horizontal leg 25a secured to the lower portion of the lay ID by means of bolts I3 and 26, both of said bolts penetrating the lay plate II and lay ID, as well as slots 21 and 28 in this horiz ontal'leg. This bracket has a vertically disposed leg 25?) and integral with the lower end of said leg is a horizontally disposed leg 25c. 'The outer end of leg 250 has an open ended slot 29 in which is adjustably secured the lower end of bolt 30.

By referring to Figures 4 and 6, it will be seen that the lower end of the bolt 30 has an enlarged portion 3| which is flattened upon two sides so that this portion may be inserted in the slot 29 which rests upon the upper side of leg 25c and cooperates with washer 32 and nut 33 in securing the bolt 30 to the bracket 25. This flange 351 has a plurality of rivets 38 penetrating its outer edge which also penetrate disk 31, said disk being disposed on the upper side of flange 35. Secured to this disk is a friction lining 38 by means of the rivets 36 and additional rivets 39 which penetrate the lining and the outer edge of disk 31. While rivets are shown for securing the parts together, it is evident that other means could be employed such as welding or soldering. The friction lining 38 might be joined to disk 31 by means of a suitable adhesive, if desired. I

It is seen from the drawings, that since the bolt 38 is fixedly secured in the stationary portion 250, and since the disk 3! and the friction lining 38 are fixedly secured to the bolt, no rotative movement can take place. Bolt 30 has a squared portion 48 around which is secured a plate 4|, said plate 4| having a friction lining 42 secured to the lower side thereof by any suitable means such as rivets 43. Likewise, this disk 4| and lining 42 are fixedly secured to the bolt 30 due to the squared portion 48 penetrating a squared hole in the disk 4|. Rotatably mounted between the friction members 38 and 42 and around the intermediate portion 44 of bolt 38, is a movable clutch plate 45 which is preferably made of any suitable light weight material such as aluminum. This member 45 has extending therefrom, an arm 46, which arm normally projects outwardly into the path of travel of the picker stick Hi. When the picker stick l6 has moved to its forward position the arm 45 and its associated parts are in the position shown in Figure 1, whereas, when the picker stick has moved to its extreme backward position by virtue of the impact of the shuttle against the picker H, the arm 46 is in the position shown in Figure 5. It should be observed that when in the position shown in Figure l, the picker stick Hi can move backwardly without obstruction to engage the arm 45 and cause it to rotate to the position as shown in Figure 5. At this time, the arm is substantially at right angles to the path of travel of the picker stick. When it has reached this position, due to predetermined adjustment made upon the friction embers, the impact will have been absorbed and the parts will remain in this position until the loom mechanism moves the picker stick I6 in the opposite direction to expel the shuttle from the box. When in the extreme backward position, it will be noted that another projection 48 is disposed along the forward'edge of the picker stick 3. This projection is then in the path of travel of the picker stick and upon the forward movement of the same, the projection 48 will be moved in a clockwise manner in Figure 3 to restore the arm 46 to the position shown in Figure 1. When this restoring has been effected, the projection 48 is out of the path of travel of the picker sticklfi and therefore, when the shuttle again enters-the shuttle box and forces the picker stick l6 backwardly, this projection will not offer any obstruction. On the other hand, when the picker stick rotates the arm ,46 in a counterclockwise manner, the projection 48 will simultaneously be rotated into the path of travel of the picker stick. In order to provide a wearing surface for the picker stick to engage, the arm 46 and the projection 48 has been lined with a suitable material such as a leather strip 50 which strip is secured to these members by means of screws5l.

The amount of friction produced between members 38, 42 and 45, is varied by means of a suit able dish-shaped member 55 which is mounted around the upper restricted end 56 of the bolt 30, see Figure 4. The rim of this dish-shaped member is pressed downwardly against the top of the disk 4| by means of a suitable washer and nuts 58 which are mounted around the upper end of portion 56. By manipulating these nuts, the amount of pressure exerted by the member 55 upon the disk 4| may be varied, and as a result, the friction between the friction members 38, 42 and 45 will likewise be varied.

In the drawings and specification there has been set forth a preferred embodiment of the invention, and although specific terms are employed, they are used in a generic and descriptive sense only, and not for purposes of limitation, the scope of the invention being set forth in the appended claims.

We claim:

1. A picker stick check for looms comprising a bracket secured to the lay of the loom and having a portion extending horizontally beneath one side of the lay and to one side of the line of travel of the picker stick, a vertically disposed bolt mounted in said bracket for adjustment in a horizontal plane, a pair of spaced friction disks one of said friction disks being loosely mounted on said bolt and the other friction disk being fixed to said bolt, a plate member disposed between said friction disks and having an arm extending therefrom into the path travelled by the picker stick, resilient means for applying pressure to one of said friction disks and said plate member to retard movement of the plate member, said plate-member also having a projection thereon adapted to be engaged by the picker stick and moved out of the path of the picker stick to reset the plate member to a position where said arm will engage said stick when the stick travels in the opposite direction.

2. A picker stick check for looms comprising a bracket secured to one side of the lay of the loom, a plate member frictionally mounted on said bracket and having a pair of spaced projections of different lengths disposed in the path of the picker stick whereby the picker stick will be checked in its travel in one direction by the longer projection and during its initial travel in the other direction will engage the shorter projection and move it out of the path of the picker stick and re-set the frictionally mounted member.

3. A picker stick check for looms comprising a member mounted on the lay of the loom and having an arm projecting into the path of travel of the picker stick as it travels in one direction, frictional means resisting movement of the member by engagement by the picker stick and a projection on said member of shorter length than the arm and adapted to be engaged by the picker stick upon its initial movement in the other direction to move the projection out of the path of the picker stick and to move the member to a position where said arm will be engaged by the picker stick upon the picker stick being moved in said one direction.

4. A picker stick check comprising an oscillatable member having an arm disposed in the path of movement of the picker stick as it travels in one direction, and having a projection thereon of shorter length than the arm and engageable by the picker stick during its initial movement in the other direction to move the projection out of the path of travel of the picker stick and reset the member so that said arm will again be engaged by the picker stick to arrest the same.

5. In a loom having a lay, and a picker stick for propelling and receiving a shuttle in said lay, means for arresting the movement of said picker stick upon the reception of a shuttle comprising a friction clutch carried by said lay, said clutch having a projection extending therefrom normally engageable by the back edges of said stick when receiving a shuttle, a shorter projection extending from said clutch and movable into the path of the front edge of said stick, as the picker stick is arrested by the first projection, whereby the engagement of the first projection will retard the momentum of the stick and the engagement of the shorter projection during the initial movement of the picker stick during a pick will restore the first projection to normal position and remove the shorter projection out of the path of travel of the picker stick.

6. In a loom having a lay, and a picker stick for propelling and receiving a shuttle in the lay, means for arresting the movement of said stick upon the reception of a shuttle comprising a friction clutch carried by said lay, said clutch having a projection extending therefrom normally engageable by the back edge of said stick when receiving a shuttle, a second shorter projection extending from said clutch and movable into engagement with the front edge of said stick, whereby the engagement of the first projection will retard the momentum of the stick and the engagement of the second projection during initial picking movement of the picker stick will move the second projection out of the path of travel of the picker stick and will restore the first projection to normal position, and means for varying the frictional resistance'of said clutch.

7. A picker stick check for looms comprising a plate mounted for oscillatory movement in a substantially horizontal plane, friction means normally retarding oscillatory motion of the plate in both directions, said plate having a pair of projections thereon extending into the path of travel of the picker stick and being spaced from each other a distance substantially that of the depth of the picker stick, one projection being adapted to be engaged by one edge of the picker stick when moved by the impact of an incoming shuttle and whereby the other projection will be moved into close proximity to the other edge of the picker stick, so that when a picking operation is carried out, the picker stick will engage the second projection upon its initial picking movement and will re-position the plate to cause the first-named projection thereon to be in position for engagement with the picker stick upon its next motion.

8. In a loom having a shuttle box provided with a slot and a picker stick mounted for oscillatory movement in said slot, means for arresting the travel of the picker stick when moved outwardly in the shuttle box by an incoming shuttle, said means including a verticallydisposed bolt mounted for horizontal adjustment with respect to the slot in the shuttle box and being disposed below and to one side of said slot, a friction disk mounted on and secured to said bolt, a plate disposed on said friction disk and loosely mounted on said bolt, a second friction disk loosely mounted on said bolt and resting on top of said plate, spring means for moving said second friction disk and said plate toward the first friction disk, said plate having a long projection and a short projection thereon, the long projection projecting entirely across said slot and being engageable by the picker stick when impelled by an incoming shuttle to stop said picker stick while the long projection is disposed substantially at right angles to the longitudinal axis of the slot and to cause the short projection to be disposed immediately in front of the picker stick, so that upon the initial movement of the picker stick in a picking motion the picker stick will engage said short projection and reset the plate to Where its long projection will engage the picker stick in its return movement upon receiving the next impact of the incoming shuttle.

9. A check for an'cscillating picker stick in looms comprising a plate mounted for oscillatory movement in a substantially horizontal plane, friction means normally retarding oscillatory motion of the plate in both directions, said plate having a pair of projections thereon extending into the path of travel of the picker stick and being spaced from each other a distance substantially that of the depth of the picker stick, one projection being adapted to be engaged by one edge of the picker stick when moved in one direction and whereby the other projection will be moved into close proximity to the other edge of the picker stick, so that when the picker stick is moved in a reverse direction, the picker stick will engage the second projection upon its initial movement and will reposition the plate to cause the first-named projection thereon to be in position for engagement with the picker stick upon its next motion.

10. A check for a picker stick in a loom, said picker stick being mounted for oscillation in a vertical plane, comprising a plate mounted for oscillatory movement in a substantially horizon tal plane, friction means normally retarding oscillatory motion of the plate in both directions, said plate having a pair of spaced projections thereon of different lengths and extending into the path of travel of the picker stick, and being spaced from each other a distance substantially that of the depth of the picker stick, the longer projection being adapted to be engaged by one edge of the picker stick when it is moved in one direction to arrest motion of the picker stick and whereby the other projection will be moved into close proximity to the other edge of the picker stick, so that when the picker stick is moved in the reverse direction, it will engage the shorter projection upon its initial movement and will reposition the plate to cause the longer projection thereon to be in position for engagement with the picker stick upon its next motion.

SANDY R. MILLER. VICTOR M. BARRIER.

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