US2065772A - Loom transfer revoking mechanism - Google Patents

Description

DeaZQ, 1936. R. G. TURNER I LOOM TRANSFER REVOKING MECHANISM 2 Sheets-Sheet Filed May 23, 1936 Inventor Richard Greevfleafl Turner ACtorney R. G. TURNER 2,065,772 LOOM-TRANSFER REVOKING MECHANISM Filed May 25, 1936 2 Sheets-Sheet 2 I "V enT or R\ chard Greerfleai Turner Attorney Patented Dec. 29, 1936 UNITED STATES PATENT OFFICE LOOM TRANSFER REVOKING MECHANISM Application May 23,

10 Claims.

This invention relates to improvements in means for preventing the completion of a transfer upon the occurrence of weft breakage and it is the general object of the invention to prevent 5 a bobbin in transfer position from falling on to the lay should the loom be stopped by a center filling stop motion.

In weft replenishing looms the bobbin next to be inserted into the exhausted shuttle lies under a transfer arm which usually is depressed by a connection with the lay as the latter advances. With fine filling it is customary to use a center stop motion which stops the loom before the lay strikes the fell of the cloth. Since transfer is dependent upon lay motion and is completed when the lay is in its foremost position, a stop page of the loom by the center stop motion will cause an incomplete transfer, leaving the reserve bobbin on the shuttle or some part of the lay to 20 cause damage. It is an important object of my present invention to provide a connection between the filling stop motion and the weft replenishing mechanism effective to prevent any motion of a transferrer arm which would move the reserve bobbin out of the magazine.

In order to insure prompt stopping of the loom when the center stop motion is used there is generally provided a brake controlled by a handle which is moved to stopping position by the center stop motion. This handle is conveniently near the weft replenishing mechanism and it is a further object of my invention to establish a connection between the brake handle and the transfer latch on the transferrer arm operative to move the latch out of engaging position with respect to the lay when the brake handle moves to stopping position.

In multicolor weft replenishing looms as customarily built in this country the magazine is provided with a vertically controlled slide for each stack of reserve bobbins and the magazine is reset with the vertical slide down at the completion of the transfer operation, thereby rendering the magazine incapable of repeating a transfer from a. single indication of a weft detector. It is another object of my present invention to employ the center stop motion not only for stopping the loom with the lay in. a relatively rearward position and revoke transfer, but also to reset the magazine so that there will be no danger of a second transfer unless called for by a second indication of the weft detector. Under these circumstances the magazine is reset without requiring the lay to come to its foremost posi- 1936, Serial No. 81,442

tion as is customary in the ordinary weft replenishing loom of the multicolor type.

By the use of my invention it will be understood that the center stop motion can stop the loom on a pick indicated for transfer with the lay in a relatively rearward position without likelihood of a reserve bobbin being discharged from the magazine, thereby avoiding any damage which would otherwise occur should the bobbin be advanced toward the lay by an incomplete transferring operation.

With these and other objects in view which will 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 an end elevation of a portion of a loom having my invention applied thereto,

Fig. 2 is a detailed rear elevation looking in the direction of arrow 2, Fig. 1,

Fig. 3 is a transverse section through a portion of the loom showing the lay advancing and with the center stop motion in normal position,

Fig. 4 is similar to a portion of Fig. 3 but showing the center stop motion operative to apply the brake of the loom,

Fig. 5 is an end view on an enlarged scale in the direction of arrow 5, Fig. 1, and

Fig. 6 is a diagrammatic view showing the relation between the lay carried hunter and dagger and the parts they operate.

Referring to the drawings, the loom frame H] has mounted for rotation therein a shipper shaft l l on which is pivoted a brake handle I2. The latter has a depending finger l3 carrying a pin l4 received by slot l5 in a rocking lever l E pivoted at H. The lower end of lever I6 is connected to a link l8 attached to a brake operating bar I9 extending rearwardly or to the right as viewed in Fig. 1 to have connection with the brake motion not shown of the loom. When the parts are in the running full line position shown in Fig. 1 bar I9 is elevated, but when handle I2 moves to the rear stopping dotted position shown in Fig. 1 the pin I 4 moves out of a notch 20 at the upper end of slot I5 and the lever 16 rocks in a left hand direction with a corresponding down motion of the bar l9 to brake the loom.

A sleeve 25 surrounds the shipper shaft H and has the brake handle secured thereto. The latter carries a lug 21 positioned for engagement with a knock-off set screw 28 carried by and adjustable with respect to a shipper handle 26 secured to the shipper shaft. A locking pin 29 on the shipper handle rests in a notch 30 in a shipper lever 3| when the loom is running, the lever 3| when in the running left hand position shown in Fig. 1 drawing rods 32 and 33 forwardly to clutch the loom for driving. When the shipper handle moves to the dotted stopping position shown in Fig. 1 the lever 3| is free to move to the right from the position shown in Fig. 1, thereby unclutching the loom in the usual manner. It is not deemed necessary to show either the shipping or braking mechanism and it is considered suificient to state that when the brake handle moves to the dotted line position of Fig. 1 the brake will be immediately applied and will be set tight enough to bring the loom to rest while the lay is moving forwardly and before it reaches front center position.

The magazine M supported by the loom frame is of the customary multicolor type and includes reserve bobbin guideways 35 and bobbin supports 36 and 31 which may be located respectively in front of and behind a bobbin B held on them in transfer position. A transfer arm 38 pivoted as at 39 carries a latch holder 4!] to which is adjustably secured a latch 4| to engage a bunter 42 on the lay L. The shuttle S travels along the lay toward the magazine end of the loom when it is to be replenished by the bobbin B.

Referring to Fig. 5, the magazine has vertical slides 43 which extend downwardly to release mechanism for the stored bobbins not shown, and each slide has pivoted to the upper end thereof a dog 34 which is normally in the down, closed full line position. A shelf 44 is secured to a shaft 45 and is normally in the raised dotted line position of Fig. 5 when the loom is not set for transfer. When indication of weft exhaustion is given the slide 43 corresponding to the indicating shuttle is raised to the dotted line position of Fig. 5 in the usual manner by mechanism not shown and the dog is then free to move over a portion of the shelf 44, as indicated in dotted lines. At a later time the elevated slide 43 will be depressed, thereby lowering the shelf 44 to the full line position of Fig. 5. The shaft 45 is journaled in the magazine frame and has secured thereto an arm 46 carrying a block 41 which slides in a slot 48 located in the left arm 49 of a yielding lock lever 5|] movable about a fixed axis 5|. A stop screw 52 on arm 49 is positioned for engagement with a portion 53 of the magazine. The right arm 54 of the lever 5!] is connected to a depending rod 55 which passes under the normally down latch 4|.

When the shelf 44 moves down lever 50 is rocked in a left hand direction to elevate rod 55 and move the latch 4| from the dotted to the full line position shown in Fig. 1. In this position the latch is located for engagement with and in the path of a lay bunter 42 as the latter advances to effect downward motion of the transfer arm and cause transfer of the reserve bobbin B into the shuttle S in known manner.

When the lay reaches front position and the transfer is completed the magizne will be reset, the means for accomplishing this result being shown herein as a cam face 51 extending downwardly and rearwardly on the under side of the latch 4|, forward motion of the latch under influence of the lay causing downward motion of the rod. 55 to rock the yielding lock shown in Fig.

5 back to normal position. A fixed guide 58 prevents forward motion of rod 55, assisting cam 51 to lower said rod. It is customary to employ additional means for resetting the magazine but the cam on the under side of the transfer latch is considered sufficient for present purposes to set forth means whereby downward motion of rod 55 induced by the advancing latch will act to reset the magazine. The magazine set forth herein may be of the usual construction such as shown, for instance, in prior patent to Ryon No. 1,030,748.

When the finer grades of yarn are woven it is customary to employ a center stop motion located on the lay between the selvages of the fabric being woven. Such a stop motion detects every pick of weft and operates sufliciently early tostop the loom before the reed can strike the fell of the cloth. I have shown a conventional center stop motion in Figs. 3 and 4, wherein it will be seen that the lay carries a bracket 60 through which extends a small shaft 6| carrying a drum 62 and the tines 63 0f the filling fork fall into a well 64 when weft is absent. A link 65 is pivoted to the drum and is connected to a lever 66 acted upon by a rod 61 extending upwardly from a point behind the axis of the lay. In this way the dagger 68 carried by lever 66 is permitted to move upwardly in known manner if the tines 63 fall into the well 64 because of weft absence. If, on the other hand, weft is present in the shed, the tines are supported and relative upward movement of the dagger with respect to the lay is arrested.

The breast beam 69 carries a bracket 10 hav ing a shaft 1| provided with 2. lug 12 having a notch 13 to receive the dagger 68. A knock-off arm 14 is secured to the shaft H and engages a second arm 15 secured to the sleeve 25. A dagger shield 16 swings around the shaft H and has an upwardly extending resetting finger 11 pcsitioned for engagement with a part 18 of the lay. A lug 19 moving with the shield is located for engagement with the light spring lock 89 secured to arm 15.

Under normal weaving conditions when weft is present the lay will move toward and from the breast beam 69 but the dagger 68 will be in relatively low position because of the fact that the weft in the shed supports the tines 63. When weft is absent, however, the dagger will rise to the dotted line position shown in Fig. 3 to enter notch 13, after which continued forward motion of the lay will rock elements 12 and 14 in a counter clockwise direction as viewed in Fig. 3 to cause downward motion of the knock-off arm 15. This effects rocking of the sleeve 25, and the brake handle previously described as secured to this sleeve will also rock, moving from the full to the dotted line position shown in Fig. 1 to apply the brake to the loom not shown.

If the'magazine has previously been set for a transfer and has released a bobbin from one or another of the compartments 35 to be held by the supports 36 and 31, as shown in Fig. 1, on a pick of the loom when the filling stop motion rocks the brake handle to stopping position, the lay will come to rest a short distance behind the fell of the cloth. If under these conditions latch 4| should remain in its elevated full line position of Fig. 1 the transfer arm 38 would have a partial downward motion the effect of which would be to move the reserve bobbin B to a position below that suggested in Fig. 1, but not low enough to complete transfer into the shuttle S. The released bobbin would therefore be likely to break some part of the mechanism, and the present invention relates to means for preventing this improper release or incomplete transfer of the reserve bobbin.

In carrying my invention into effect I provide the brake handle with the rearwardly extending finger 99 and pivot thereto the lower end of a link 9| which extends upwardly through a fixed guide 92 and is bent over latch 4|, as at 94. When the brake handle is moved to the running left hand position shown in Fig. 1 the finger is raised and the bent end 94 is therefore in its highest position where it cannot interfere with upward motion of the latch 4|. Should the center stop motion act to stop the loom as'already described the brake handle will be rocked to the stopped dotted line position of Fig. 1 to cause depression of the finger 90 and link 9| to the dotted line position of that figure. Since the upper hooked end 94 engages the top of latch 4| in its descent, said latch will be moved down to the dotted line position shown in Fig. l a short interval of time before the bunter 42 advances far enough to engage the latch. In this Way operation of the center stop motion is caused to revoke the transfer, thereby permitting the bobbin B to remain on the supports 36 and 31 Without being subjected in any way to a transfer motion. At some later time this bobbin can be released by well-known mechanism not shown herein.

The relation of the lay-carried bunter and dagger, together with the transfer latch 4| and notched arm 12, is shown in Fig. 6. For convenience the notches I3 and 96 of latch 4| and arm 12, respectively, are indicated in vertical alignment, lying along line (1, while vertical line e for the front of dagger 68 is in front of line 1 corresponding to the front end of bunter 42. As the lay advances on a beat when stopping by the weft fork and a transfer are both called, dagger 68 enters notch 73 first, and later, after an interval corresponding to distance a-bwhich is long enough to permit lowering of the latch 4| before the bunter can reach it the bunter passes over the latch without engaging it, thereby avoiding transfer.

When the link 9| moves downwardly to depress the latch 4| the latter will act to lower the rod 55 resulting, as previously described, in a resetting of the magazine, particularly the parts shown in Fig. 5. After the weaver has repaired the broken filling the brake handle will be moved back to its forward full line position of Fig. 1, thereby raising the link 9| and the loom will be ready for the initiation of another Weft replenishing operation Without further attention on the part of the weaver.

From the foregoing it will be seen that I have provided a simple means whereby a previously indicated transferring operation of the magazine can be revoked should the center stop motion act to stop the loom on the beat thereof intended for transfer. In this way the reserve bobbin resting on the supports 36 and 31 remains in the magazine without being ejected by an incomplete operation of the transfer arm toward the lay. It will also be seen that the center stop motion acts to reset the magazine so that should the weaver, when repairing the broken filling in the shed, also effect replenishment by hand, there will not be an unnecessary operation of the magazine. It is to be understood that the parts will be set in such a relation that the center stop motion will act to initiate loom stoppage by rocking of the sleeve 25 when the lay is a slight distance behind the point at which the bunter 42 would ordinarily engage the latch 4|. This setting of the parts permits sufficient time for the latch to move down out of the path of the bunter and thereby prevent any movement of the transfer arm.

Having thus described my invention it will be seen that'changes and modifications maybe m'ade therein by those skilled in the art without de parting'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:

1. In a weft replenishing loom, a lay, a center filling stop motion effective to bring the loom to rest before the lay reaches its foremost position, means to hold a reserve bobbin in transfer position, transfer mechanism effective to complete a transferring movement of the reserve bobbin when the lay reaches forward position, and means operated by the center stop motion when acting to stop the loom to prevent the transfer mechanism from engaging the reserve bobbin.

2. In a weft replenishing loom,'a lay, a center filling stop motion on the lay effective to stop the loom with the lay in a relatively rear position, means to hold a reserve bobbin in transfer position, transfer mechanism to give the reserve bobbin a complete movement by a force derived from the lay when the latter is in its foremost position, and means controlled by the center stop motion and connected to the transfer mechanism to prevent operation of the latter when the center stop motion stops the 100m.

3. In a weft replenishing loom, a lay, a center stop motion on the lay effective to cause loom stoppage with the lay in a relatively rear position, means to hold a reserve bobbin in transfer position, transfer mechanism dependent for its complete operation upon engagement and complete forward motion of the lay, and means controlled by the center stop motion and connected to the transfer mechanism to prevent operation of the latter when the center stop motion stops the loom.

4. In a weft replenishing loom, a lay, a center stop motion on the lay effective to cause a loom to stop during the forward beat of the lay before the latter reaches its foremost position, means to hold a reserve bobbin in transfer position, transfer mechanism for the reserve bobbin to be engaged by the lay as the latter moves forwardly and dependent upon complete forward motion of the lay to effect transfer of the reserve bobbin, and means controlled by the center stop motion and connected to the transfer mechanism to prevent operation of the latter when said center stop motion causes the 100m to stop.

5. In a weft replenishing loom, a lay, a center stop motion on the lay effective to initiate loom stoppage when the lay reaches a given point in the forward motion thereof and to cause loom stoppage before the lay reaches its foremost position, means to hold a reserve bobbin in transfer position, transfer mechanism for the reserve bobbin to be engaged by the lay at a point in front of the said point in the forward motion of the lay, and means controlled by the center stop motion and connected to the transfer mechanism and operative during the interval that the lay passes between said points in its forward travel to prevent operation of the transfer mechanism.

6. In a weft replenishing loom, a lay, a center stop motion, a brake handle to control loom operation, means by which the center stop motion initiates movement of the brake handle toward stopping position when the lay is in a relatively rearward position, means to support a reserve bobbin in transfer position, transfer mechanism for the bobbin dependent for operation thereof upon forward motion of the lay, and a connec tion between the brake handle and the transfer mechanism to prevent operation of the latter when the center stop motion causes movement of the brake handle.

7. In a weft replenishing loom, a lay, a center stop motion on the lay to initiate loom stoppage during forward motion of the lay and effecting loom stoppage before the lay reaches forward position, a reserve bobbin magazine capable of being set to prevent a reserve bobbin for transfer of a transferring beat of the loom and reset to prevent a repeated transfer, transfer mechanism for the reserve bobbin, and means controlled by the center stop motion when acting to stop the loom to prevent operation of the transfer mechanism and reset the magazine.

8. In a weft replenishing loom, a lay, a center stop motion on the lay, a brake handle to be moved from running to loom braking position by the center stop motion when the lay is in a relatively rearward position, transfer means set to be operated by forward motion of the lay, and a connection between the brake handle and transfer means to move the latter out of the path of the lay when the center stop motion causes the brake handle to move to braking position.

9. In a Weft replenishing loom, a lay, a center stop motion on the lay, a brake handle to be moved by the center stop motion from running to loom braking position when the lay is in a relatively rearward position, weft replenishing mechanism including a latch, means to set the replenishing mechanism for transfer with the latch in the path of the lay, and a connection between the brake handle and latch operative when the center stop motion moves the brake handle to loom braking position to move the latch out of the path of the lay and. reset the replenishing mechanism by a force transmitted through the latch.

10. In a weft replenishing loom, a lay, a center stop motion on the lay, a brake handle to be moved by the center stop motion from running to loom braking position when the lay is in a relatively rearward position, weft replenishing mechanism including a latch, means to set the replenishing mechanism for transfer with the latch in the path of the lay, said latch when moved out of the path of the lay effective to reset the replenishing mechanism, and a connection between the brake handle and latch to move the latter out of the path of the lay when the center stop motion moves the brake handle to stopping position to prevent transfer operation of the replenishing mechanism and also reset the latter.

RICHARD G. TURNER.

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