US2141666A - Picking motion for looms - Google Patents

Description

27, 1938. o. v. PAYNE 2,141,666

PICKING MOTION FOR LOOMS Filed March 10, 1957 2 Sheets-Shea 1 Inventor Oscav V. Pay ne Attorney Dec. 27, 1938. C) v PAYNE I I 2,141,666

PICKING MOTION FOR LOOMS Fi led March 10, 1937 2 Sheets-Sheet 2 Inventor 0%061 V. Payne.

Attorney Patented Dec. 27, 1938 UNITED STATES PATENT OFFICE PIGKING MOTION FOR LOOMS Application March 10, 1937, Serial No. 130,129

10 Claims.

This invention relates to improvements in picking motions for looms and it is the general object of the invention to provide a travelling surface to have driving frictional contact with the shuttle and wherein the travelling surface is actuated by mechanism connected directly and positively to a driving member of the loom.

Heretofore I have proposed the use of an endlessbelt to be moved while in frictional contact with a shuttle in the box for the purpose of propelling the shuttle across the loom. The belt is trained around two spaced pulleys one of which is the driver and receives its force either from an electric motor or a spring source of power. It is an important object of my present invention to turn the driving pulley for the belt by mechanism deriving its motion directly from a shaft of the loom.

It is a more particular object of my present invention to drive the shaft on which the driving pulley is mounted by means of a pinion and rack driven by a cam on the bottom shaft of the loom. The rack may conveniently be in the form of a segment pivoted about an axis which rocks with the lay. a

In order that the shuttle may derive maximum benefit from the picking motion I propose to reverse the belt to place the shuttle for picking and I achieve this result by a cam surface which comes into action after the time for boxing of the shuttle. This surface of the cam acts to move that part of the belt in contact with the shuttle in a direction outwardly with respect to the center of the loom so that the belt may have as large an area thereof as possible in contact with the shuttle when picking starts.

A loom will ordinarily pick a shuttle while it is moving rearwardly and it is a further object of my present invention to utilize the rearward motion of the lay to increase the turning motion of the belt. This result I accomplish by mounting the pinion on the pulley shaft a considerable distance 'abovethe axis of the lay and cause it to mesh with a rack or the like which moves forwardly as the lay moves backwardly. Theturning of the shaft is therefore due partly to the forward motion of r the rack and partly to the fact that the pinion is moving rearwardly and in doing so rolls along the rack. The picking of the shuttle will ordinarily occur when the lay is moving rearwardly at its highest rate of speed, hence the component added by the rolling of the pinion rearwardly along the segment is a maximum. 1 With-these and other objects in view which will 56 appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth.

In the accompanying drawings, wherein a convenient embodiment of my invention is set forth,

Fig. 1 is on end elevation of a loom having my invention applied thereto,

Fig. 2 is a front elevation taken in the direction of arrow 2, Fig. 1, v

Fig. 3 is a horizontal section on line 3--3, Fig. 2 showing the parts in the position they assume at front center,

Fig. 4 is a plan view in the direction of arrow 4, Fig. 2, and Fig. 5 is a detail of the cam picking mechanism.

Referring to the drawings, the loom frame It) has journaled therein top and bottom shafts H and I2, respectively, which are connected by gears i3 and H3, respectively, the latter being twice the size of the former. A lay connector l5 extends between the top shaft and the lay L and acts in the usual manner to give the lay back and forth motions. As is customary, the shuttle S is picked out of the shuttle box B during the backward stroke of the lay and when the latter is approximately midway between its front and back positions. The lay is mounted on swords 20 one of which is shown in Fig. l and each sword is connected by a bearing 21 to a rocker shaft 22 journaled as at 23.

The particular means for picking the shuttle by frictional contact therewith comprises an endless belt 25 trained around an outer idle pulley 26 journaled ona stud 21 fixed in a stand 28 mounted on the rear of the lay beam. The inner end of the belt is trained around pulley 30 shown at the left of Fig. 4 and secured to the upper end of a vertical shaft 3|, the upper end of which turns in a bearing 32 on the lay similar to bearing 28.

lhe shuttle box B comprises a front plate 35 secured to the lay and placed to engage the front wall of the shuttle S, while the rear wall of the shuttle engages the front section of belt 25, as will be apparent in Fig. 4. A shuttle stop 36 at the end of the lay to limit outward motion of the shuttle may be employed if desired. A mechanism P indicated in Fig. 4 is part of a protector mechanism and serves also to press the belt against the shuttie and may be substantially the same as that shown in my prior Patent No. 2,012,052.

The mechanism thus far described may be that found either in the usual loom or inmy aforesaid patent, and at the time of picking the belt 25 travels in the direction of arrow a, Fig. 4, to propelthe shuttle to the left by frictional engagement between the belt and the rear wall of the shuttle.

for actuating the My present improvement relates more particularly to the mechanism for turning the shaft 3|, and in carrying my invention into effect I provide a grooved cam ill secured to the bottom shaft l2, which makes one revolution for two beats of the loom. The cam has a high dwell area 4| as shown in Fig. 5 and a low dwell 42 shorter than and located on the opposite side of the cam axis from the high dwell. The cam turns in the direction of arrow b and has a decline surface 43, while the remainder of the cam is formed of two incline surfaces one of which, indicated at ,is relatively slight, while the other part 45 isquite steep, extending substantially along a line radial from the axis of shaft l2.

The groove 46 follows the cam surfaces already described and receives a roll i'i mounted on a cam lever 48 pivoted at its upper end asat 49 to a stand 55 secured to the loomside. The lower end of the lever is pivoted as at 5| to a rod 52 extending forwardly, or to the left as shown in Fig. 1.

If it be desired to absorb shock in the action of the cam lever I may employ a spring rod 53 pivoted to the lever as at 54 and having secured adjustably thereto the collar 55 to receive the rearward thrust of a compression spring 55. A guide 51 is secured to the loom structure for the forward end of the rod 53 and receives the forward thrust of the spring. The cam gives the lever a very quick forward motion which is cushioned by the spring, but I do not consider the 7 spring essential and it may be omitted.

The forward end of rod 52 pivots on a stud 5%) held in adjusted position in slot 6| formed in a bevel gear segment 62. The latter is pivoted about a stud 63 carried by an arm 6'! fixed on the rocker shaft 22. A bracket 6d secured by means of plates 65 and bolts 66 to the adjacent sword 25 is braced by a bearing in mounted on the rocker shaft 22. The segment is provided with rack teeth TI to mesh with a bevel pinion 12 secured to the lower end of shaft 3|. While I have illustrated a segment, yet I do not wish to be limited to such a construction, as the teeth H constitute in effect a gear rack.

The lowerend of shaft 3| is journaled in a bearing 15 bolted as at 16 to a part T! of the bracket 56. It will be apparent therefore that bracket 54, the arm 67, the segment 62, the lower end of shaft 3| and the pinion 12 rock about the shaft 22 as an axis, swinging back and forth' with the lay.

In operation, the bottom shaft l2 makes a revolution every second beat of the loom and as shown in full lines in Fig. 1 the parts are in the position they assume with the lay on front center prior to a picking of the shuttle. The roll 41 is on the low dwell 42 and the cam is turned in a left hand direction so as to cause the inclines 44 and 45 to approach the roll 41. As surface 6 engages the roll the lever 48 is rocked forwardly to rock the segment 62 rather slowly, causing turning of shaft 3| and thebelt at such a rate as willfprevent the belt from slipping along the front wall of the shuttle. The latter, however, will slip along the box front 35. Thereafter steep incline 45 engages the roll and gives the segment and belt a rapid motion to pick the shuttle. During this period the segment and lever will move from the full to the dotted'lines of Fig. l. a

It will be noted that the'lay is moving rearwardly when the segment moves forwardly, and as a result of this relation, the pinion is caused to turn for two reasons, one due to the movement of the segment, and the other due to the rolling of the pinion along the segment due to rearward motion of the lay. These factors both tend to turn the shaft 3| and belt in the same direction, and their effects are therefore added, giving the belt a faster rate of motion than would be derived from either factor alone.

At the end of the pick the roll l? is at the beginning of the high dwell 4| and will remain in this position throughout the greater part of the ensuing beat of the loom. When the same position for picking is next reached by the lay the shuttle will be picked from the opposite end of the loom and will enter the box B when the lay is approximately at bottom center position, or midway in its forward beat. At this time the decline 43 acts to move the lever 48 rearwardly or to the right as viewed in Fig. 1, thereby giving a reverse motion to the belt during the time that the shuttle is boxed. As a result of this reverse moticn the belt 25 will travel in a direction opposite to arrow at, Fig. 4, for the purpose of placing the shuttle S in boxB. This placing of the shuttle insures adequate contact between the forward portion of the belt and the rear wall of the shuttle during the ensuing pick. At the end of the shuttle placing operation, the roll, 4'! passes from the decline 63 to the short dwell 52, thereby holding the belt and shuttle substantially stationary in the box for a short period prior to picking.

From the foregoing it will be seen that I have provided means for picking the shuttle by means of an endless belt driven by a cam on one of the loom shafts acting on a segment gear which turns a pinion connected to the belt. It will further be seen that the cam is so constructed that at the beginning'of the working stroke of the segment the latter will have a relatively slow motion to prevent the belt from slipping along'the shuttle, after which the segment is given a rapid motion. It will also be seen that the shock absorbing spring 55 may be employed if desired to check the blow imparted to the roll 41 and the lever 48 by the steep incline 45. Further, it will be seen that the axis 63 lies behind the rocker shaft 22 so that the rocking of the lay has little or no effect in the position of the segment and does not interfere with the action of the cam. Because of the location of the pivot for the segment the latter is moved by a motion derived from the cam without substantial interference on the part of the lay motion, and the time of picking may therefore be varied merely by setting the cam 45 around the shaft l2, that part of the belt motion derived from the segment being maintained the same for all settings of the cam. It will be seen also that the rate of motion of the belt'has two additive components, one due to 'motion of the segment and the other due to rearward motion of the lay.

It will further be seen that the cam is so constructed as to place the shuttle and bring the latter to restwith respect to the lay in time for a transferring operation of the magazine. The short dwell 52 which lies between the decline and the incline surfaces of the cam acts early enough in the cycle of belt movements to place the shuttle and'maintain it at rest with respect to the lay during the'transferring interval. -It is sufflcient if the short dwell 42 brings the belt to rest just before the lay reaches front center.

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is: k

1. In a loom having a shuttle to be picked, a lay rocking about a pivot, an endless friction belt movable in the direction of the length of the lay when in contact with the shuttle to pick the latter, a rotary element having driving contact with the belt, a segment gear, a pinion moving with the rotary element and meshing with the segment gear, a pivot support on the lay for the segment normally in substantial horizontal alignment with the pivot of the lay, and means to move the segment to cause the pinion to rotate in a direction to move the belt to pick the shuttle, said means imparting driving force to the segment in.

a substantially horizontal direction, whereby rocking of the lay imparts no substantial motion to said segment in a horizontal direction by reason of the location of the pivot of the segment.

2. In a loom having a lay moving in a given direction when picking, a shuttle, a belt movable in the direction of the length of the lay in frictional contact with the shuttle to pick the latter, a pinion mounted on the lay and movable with the belt, a rack meshing with the pinion, and means to move the rack in a direction opposite to said given direction of the lay at the time of picking to turn the pinion and cause motion of the belt, movement of the pinion and belt being due partly to the motion of the lay and partly to motion of the rack.

3. In a loom having a lay moving rearwardly during the period of picking and operating with a shuttle, a belt to have frictional contact with the shuttle and movable in the direction of the length of the lay in a direction to pick the shuttle, a gear pinion mounted on the lay and connected to and movable with the belt, a rack meshing with the pinion, and means to move the rack forwardly as the lay moves rearwardly to rotate the pinion, rotation of the pinion being due partly to forward motion of the rack and partly to rolling of the pinion along the rack due to rearward motion of the lay.

4. In a loom having a lay and operating with a shuttle, a belt movable in the direction of the length of the lay in frictional contact with the shuttle to pick the latter, rack and pinion means for operating the belt, the latter movable with the pinion and the pinion being mounted on the lay, and simultaneously acting coordinated means to move the lay and rack in opposite directions at the time of picking, the turning of the pinion being due partly to motion of the rack and partly to motion of the lay.

5. In a loom operating with a shuttle, a belt movable in a picking direction while in frictional contact with the shuttle to pickthe latter, a pinion connected to. and moving with the belt, a rack meshing with the pinion, and simultaneously acting coordinated means to move the pinion and rack in opposite directions to turn the pinion, turning the pinion being due partly to its own motion in one direction and partly to motion of the rack in the opposite direction.

6. In a loom having a lay and a shuttle to be picked, an endless friction belt movable in the direction of the lay when in contact with the shuttie to give the latter a picking impulse, the shuttle moving out of contact with the belt when travelling across the loom, a rotary element having driving contact with the belt, a cam requiring two beats of the loom for a complete rotation thereof, said cam having an incline corresponding to a relatively small angular motion of cam and having a return decline corresponding to the angular motion of the cam occurring during at least one full beat of the loom, and operating connections between the cam and element to give the latter a quick motion derived from the incline to move the belt in a direction to pick the shuttle and thereafter give the belt a continuous return motion corresponding to at least a beat of the loom to move the belt in the opposite direction preparatory to another pick.

'7. In a loom having a lay and a shuttle to be picked, an endless friction belt located at one end of the lay and movable in the direction of the length of the lay when in contact with the shuttle to give the latter a picking impulse after which the shuttle leaves the belt to travel across the loom, a rotary element having driving contact with the belt, a rotating cam requiring two beats of the loom for a complete rotation thereof and having an incline corresponding to a relatively small angular motion of the cam and a decline corresponding to angular motion of the cam occurring through at least one heat of the loom,

a gear rack, a pinion meshing with the rack and having driving relation with the element, and connections between the cam and the rack by which the incline of the cam gives the belt a short quick motion in a picking direction to start the shuttle across the loom bythe incline of said cam, and thereafter give said belt a slow gradual return by the decline of the cam extending over a period corresponding to a pick or more of the loom to return the belt for the following pick.

8. In a fly shuttle picking motion for a loom having a lay and a shuttle to be picked, an endless friction belt movable in the direction of the length of the lay when in contact with the shuttle to start the latter on a picking flight, a rotary element having driving contact with the belt, a rotary cam requiring two beats of the loom for a complete rotation thereof, said cam having a single incline and a single decline, the incline corresponding to a comparatively small angular motion of the cam and the decline corresponding to a relatively large angular motion of the cam, and connections between the cam and the rotary element to give the belt a single picking motion derived from the incline for each complete revolution of the cam and effective thereafter to give the rotary element a single return motion in the opposite direction.

9. In a fly shuttle picking motion for a loom having a lay and a shuttle to be picked, an endless belt at one end of the lay movable in the direction of the length of the lay when in contact with the shuttle to start the latter on a. flight across the loom, a rotary element having driving contact with the belt, a rotary cam requiring two picks of the loom for a complete rotation thereof, said cam having a single incline corresponding to a comparatively small angular motion of the cam and having a single decline corresponding to a large angular motion of the cam, and connections between the cam and the rotary element, said connections to give the belt a picking motion derived from the incline and thereafter give in a picking direction, a second geared element having driving connection with the first element, said elements being movable bodily each with respect to the other and so related that movement of the second element in a given direction causes motion of the first element in a picking direction,

motion of said first element bodily in the opposite direction also causing motion thereof in a picln'ng direction due to the driving connection between said elements, means to move the second element bodily in the 'given direction, and

additional means to move the first element bodily

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