US1957118A - Bobbin release for weft replenishing mechanism - Google Patents

Description

y 1, 1934- w. H. WAKEFIELD 1,957,118

BOBBIN RELEASE FOR WEFT REPLENISHING MECHANISM Filed Feb.

mlentor [Hauler H. Wakefield J mtor'neqs Patented May 1, 1934 1,95Z,ll8

BOBBIN RELEASE FOR WEFT REPLENISH- ING MECHANESHZ Walter H. Wakefield, Worcester, Mass, assignor to Crompton & Knowles Loom Works, Worcester, Mass, a corporation of Massachusetts Application February 11, 1932, Serial No. 592,368

9 Claims.

This invention relates to improvements in mechanism for releasing untransferred bobbins more particularly in multicolor weft replenishing looms and it is the general object of the invention to provide means operative through the presence of an untransferred bobbin to eifect the release.

In multicolor weft replenishing looms the reserve bobbins are drawn from any one of several sources and are advanced to transfer mechanism b devices acting in time with the active shuttle. If a shuttle to be replenished is improperly positioned on the transferring beat of the loom a revoker operates to prevent transfer, but the full bobbinintended for insertion in the depleted shuttle remains in transfer position. In looms of this type the active shuttle changes frequently so as to vary the filling, and the next shuttle to arrive under the magazine may carry a weft different in character from that of the untransferred bobbin. It is for this reason that means must be provided to rid the magazine of untransferred bobbins to prevent confusion of color in the pattern.

I-Ieretofore it has been proposed to accomplish this result in several ways one of which is to give the bobbin support a periodic releasing movement occurring shortly after the normal time for transfer. In other instances the bobbin support is normally held in rear non-supporting position and is moved into bobbin supporting position temporarily prior to and during transferring operations only. In either instance, the mechanism operates independently and without aid from the bobbin. In the first of these forms mentioned the operation is recurrent every second beat of the loom and this leads to rapid wear, while in the second the resetting has been derived from forces which act to release the bobbin when the lay is in its forward position. Still other devices have been proposed which are operative on the backward stroke of the loom, but have acted independently of bobbin presence and have required complicated mechanism to restore them to normal.

It is an important object of my present invention to provide a bobbin releasing device which shall be dependent for its operation upon actual presence of the bobbin, the latter acting, as by its weight. to render releasing mechanism operative. This result can be obtained by providing a trip normally held out of the path of the lay but projected by the weight of the bobbin into the path of the lay, so that on the backward stroke of the latter subsequent to the normal time for transfer the trip will be engaged by the lay and rendered effective to release the bobbin. This operation will not take place if the bobbin been transferred, or if no bobbin be present.

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 claims.

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

Fig. l is a vertical central section taken through a magazine having my invention applied thereto looking toward the center of the loom with the parts in normal non-transferring position,

Fig. 2 is a view similar to a portion of Fig. l, but with the bobbin in transferring position and the trip or latch set for release, the lay being in forward position,

Fig. 2 is a view similar to Fig. 2 but showing the lay on its rearward movement iii-engagement with the trip, and

Fig. 4 is a horizontal section on line 44 of Fig. 3.

Referring to the drawing, I have shown a magazine 10 having a wing 11 which supports a stand 12. A bobbin support 13 is pivotally mounted as at 14 to a vertical suspending link 15 mounted on and movable about one of the tie rods 16 of the magazine. The support 13 is pro vided with a bobbin run 1'? which cooperates with a relatively fixed support F to support a weft carrier W in transfer position.

A stop screw 18 in the link 15 engages a depending iinger 19 of the stand 12 to limit right hand movement of the link as viewed in Fig. 1. A coil spring 20 is operative to hold the support yieldingly in the position shown in Fig. 1. A small arm 21 extends rearwardly from the upper part of link 15 and is connected to the upper end of a tension spring 22 the lower end of which is attached to an arm 23 of the support. Relative movement of the bobbin support and the link 15 may be limited by a stop surface 24 on the link which engages the support.

A pin 25 on the arm 23 projects through a slot 26 formed in a link 27 pivoted as at 28 to the stand 12. An adjustable stop screw 29 in the link 27 engages the stud 25. The lay 30 supports a shuttle S and has a box back 31 and a binder 32. The usual transferrer arm 33 may be provided for moving a bobbin from the supports into a depleted shuttle.

The matter thus far described is of common construction and operates in the usual manner to give the bobbin support a comparatively straight horizontal backward movement, such as shown in prior patent to Ryon No. 1,366,950. The rear butt bobbin support thus far set forth herein has gone into general use in connection with the type of magazine shown in Patent No. 1,030,748. The mechanism already described is for purposes of illustration, and any similar bobbin support may be used.

As previously stated, the bobbin may be advanced from any one of several sources and moved to the supports 17 and where it will await transfer. If the shuttle is misplaced, however, mechanism not shown herein but well understood operates to prevent descent of the transferrer arm, thus leaving the bobbin on the supports and rendering necessary its discharge from the magazine.

In carrying my invention into effect I provide a light lever or trip which is pivoted on an extension ofthe stud 14, as shown in Fig. 4. This trip has an upper surface 41 which may conform generally to the surface 17 of the main support. The lower forward end of the trip is provided with a shoulder 42, while the rear end is provided with a counter weight 43 just sunlciently heavy to overbalance the forward part of the trip, thus rendering the same responsive to light forces, and holding the trip yieldingly in the position shown in Fig. 1.

The lay is provided with an actuator 44 mounted in any convenient manner to move with the lay and is positioned for engagement with the shoulder 42. The under side of the trip is provided with a slightly inclined surface 45 which under effective to hold the shoulder 42 above the path of movement of the actuator 44 under normal non-transferring conditions. When the bobbin is advanced from one or another of the cells of the magazine, however, it will roll to the position shown in Fig. 2 and will have contact with the upper surface 41 of the trip. The latter, being responsive to light forces, is moved by the bobbin to the position shown in Fig. 2, thus placing the shoulder 42 in the path of the actuator 44.

In certain looms the bobbin will move to transfer position while the lay is in its backward position and as a result the cam face 45 will be engaged by the actuator on the forward stroke of the lay. The cam face is shallow, hence the actuator will give the trip a gradual upward movement such as will not cause objectionable upward movement of the bobbin. As the lay continues its forward movement on the transferring beat the weight of the bobbin will restore the latch or trip to the position shown in Fig. 2.

If transfer is normal the arm 33 will insert the bobbin into the shuttle, the rear support moving back slightly against the action of spring 22 in a well-known manner. The trip being no'longer in engagement with the bobbin, will move upwardly to the full line position shown in Fig. 1, so that subsequent rearward movement of the actuator will not engage the shoulder 42. Should the shuttle be improperly positioned, however, the resultant revocation of transfer will leave the bobbin on the supports, the effect of which will be to maintain the shoulder 42 in the path of the actuator. As the lay moves rearwardly, therefore, the rear leading surface of the actuator will engage the shoulder 42 to move the trip and stud 14 rearwardly. The effect of this is to leave the bobbin unsupported and it will fall out of the magazine.

The lay moves about a pivot which is near the floor on which the loom is supported, while the support 13 moves rearwardly in practically a horizontal line, so that as the lay continues its rearward movement the abutment 44 will become disengaged from the shoulder 42 and spring 22 will effect return of the support to normal position.

The actuator 44 is preferably placed on the front part of the lay so that the latter is out of the path of the dropping released bobbin. In this way all opportunity for entanglement with the lay and the bobbin is obviated.

From the foregoing it will be seen that I have provided a simple form of bobbin release which operates on the backward movement of the lay to release an untransferred bobbin by coaction of members one of which is positioned by the bobbin. In this way the connections previously used are omitted and assurance given that the support will move only when needed to release an untransferred bobbin. It will further be seen that the operation of the device is dependent upon presence of the bobbin and that the latter, by some inherent characteristic, such as its weight, renders the mechanism operative.

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:

1. In a weft replenishing loom having yieldable means to hold a bobbin in transfer position and having a lay movable back and forth therein, means positioned by an untransferred bobbin in transferring position to effect operative connection between the lay and the means to move the latter to bobbin releasing position.

2. In a weft replenishing loom having yieldable means to hold a bobbin in transfer position and having a lay movable back and forth therein, a releasing trip normally out of the path of the lay and movable by the bobbin into operative position with respect to the lay, and connections between the trip and the means to move the latter to bobbin releasing position.

3. In a .weft replenishing mechanism having provision for supporting a bobbin in transfer position, a bobbin release mechanism, and means rendered effective by the presence of an untransferred bobbin after revocation of transfer to operate the release mechanism.

4. In a weft replenishing mechanism, a support to hold the bobbin in position for transfer, and means rendered operative by the presence of the bobbin to move said support to non-supporting position after normal time for transfer.

5. In a weft replenishing loom having a regularly moving part, means to support a bobbin in transfer position, and a device rendered operative by the presence of the bobbin after the normal time for transfer to effect operative relation between said part and the support to move the latter to bobbin releasing position.

6. In a weft replenishing mechanism, a yieldable support to hold the bobbin in transfer position, a trip for the support movable relatively to the latter by a bobbin, and means operative subsequent to the normal time for transfer to move the trip and support to effect release of an untransferred bobbin.

effect discharge of the latter from the loom after revocation of transfer.

9. In a weft replenishing loom, a support to hold a bobbin in transfer position, and means dependent upon and operative through presence of an untransferred bobbin to move said support out of bobbin supporting position after the normal time for transfer.

WALTER H. WAKEFIELD.

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