US1668393A - Withdrawing means for side-slip weft detectors - Google Patents

Description

May 1, 1928.

- H. L. BLANCHARD WITHDRAWING MEANS FOR SIDE SLIP WEFT DETECTORS \Filed May 25. 1926 Y 2 Sheets-Sheet 1 INvENToFe HAROLD L. BLANCHARD ATIREDJFYQ,

May 1, 1928. 6 1,668,393 j I H. BLANCHARD WI 'i HDRAWING- MEANS FOR SIDE SLJ IP WEFT DETECTORS Filed May 25. 1926 2 Sheets-Sheet 2 INVENTO Fe I HAROLD LA. Bg'fimmxan ATTORNEYS.

Patented May 1, 1928.

UNITED STATES PATENT oFFica.

HARonpL. BLANCIIARDQOI tnLLnnnY, MAssAoH SErT Assieivon To exemption & KNOWLES LOQM wons, or woncnsr'sa, MASSACHUSETTS, A ooaro aa'rion or MASSACHUSETTS.

WITHDBAWING MEANS eon Application filed May 25,

This invention relates to means for Withdrawingloom weft detectors 0]": the side slip type and it is the general object of the invention to improveupon means heretofore used for accomplishing thisresult by a very simple and inexpensive mechanism.

Weft detectors for multi-color automatic looms are usually located on the magazine end ofthe loom and where they are of the type which enter a side wall of ithershnttle provision must be made forwithdrawing the detector on transferring beats of the loom in order to provide a clear path for the incoming full bobbin. This movement of the detector out of the pathof the bobbin must also be accomplished without giving a second indication'to the magazine and it is a further object of myinvention to accomplish these two results by a minimum of parts which shall be under control of the transfer mechanism.

In the usual torm of multi-color we:ft.r e plenishing mechanismindication of weft es:- haustion is communicatedto the magazine by mea11s of a floating or actuator lever whichnormally has a downward movement on detecting beats of the loom, this movement being interrupted'by a so-called controller on indicating beats. It is a further object of my invention to combinethe con- (roller for the actuator lever and the withdrawing device viforthe detector in one part so placed as to be under control ol the transferre r mechanism.

A more specific object of my invention is to provide a connection "for withdrawing the detector-by a device having somewhere in itslength a surplus amount or material whichcan'be used to atl'ordadjustments.

Nit-hthese and other objects inview which will a) iear as the descri )tion )roceeds m invention resides in the combination and arrangement of parts hereinafter described andset :forth in the claims. 1

In the accompanying drawings wherein l have shown a convenient embodiment of my invention,

Fig. 1 is a top plan view of a detector embodying my invention, the shuttle and bobbin being indicated indotted lines and portions of the mechanism being indicated in section,

Fig. 2 is a vertical section on line 22 of Fig. l,

SIDE-SLIP wnrr :oa rne'rons.

1926. Serial No. 111,661.

i 0 1 1g. 3 1s a front elevation on "a reduced scale of the structure shown in Fig. 1,

Fig. 4 a perspective view oi the with drawingmeans,

Fig. 5 is a section on line 5 and Fig. :6 is a fragmentary Ward portion of the withdrawing device after the loop therein has been contracted to afford a separating adjustment otthe two legs oit'the device.

Referring particularly to l, 2, and 3 it will be seen that I have provided a loomside lOand breast beam ll on which isdmounted the frame 12 of a weft replenishing mechanism preferably of the multicolor type such as set forth intPatent No. 1,030,748. The frame 12 is provided with a stud 13.011 which pivotallv mounted. the hub l l of a transferrer lever 15 the rear bobbin engaging arm '16 of which extends over the. shuttle S and bobbin B when the lay ison front center. The transferrer arm has 5 of Fig. 1,

depending legs ,17 between which extends therein a block on..which ispivoted an actuator'lever 21 the inner end of which is connected to a magazine actuating I'Okl 2:2 and the other-end of which lies ill slot 23 formed in the stand. \Vhrn there is sufiicient Weft present for continiua'l wezzv ing the actuator lever ill will be tree to descend in slot 23,:but when insnliiii'ient welt is present a controller pin Q-lwill' be under the outer end of the actuator lever 21 and as the block 20 dcscemlsrod will be given a down 'ard'. movement to initiate replenishment. The matter. thus tardescribed is of common construction and may be set forth in the aforesaid patent, the only 'difierenc-e being that controller pin 24 is somewhat different from that shown in the aforesaid i patent;

In carrying out my invention I provide which passes through a vertical slot 34 lower portion of a detector housing the upper part of which is provided by a cap 37. The support is provided with a boss 38 and is surrounded for the most part by an upstanding flange 89. Said flange is bro ken away at the rear right portion to define a shoulder 41 and there is projecting inwardly from the left hand side of the flange a lug which delines a notch fll'i.

The detector which I employ is formed of single piece of wire D bent at the rear portion thereof and having teeth 14: cut therein, the forwardly extending portion of the wire being curved as indicated in Fig. 1 and normally lying in contact with shoulder l1. Said wire is provid( d with a bent portion 45 and. a. straight portion extending to the left as indicated at 16. The extreme forward end of the wire is formed as a pivot indicated 47 so proportioned as to be received in notch The distance between the right hand portion of the bend 45 and the left end of the detector is slightly less than the distance between the inside side walls of the flan e 39, the purpose of this construction being to prevent undue lateral movement of the detector. The forward portion of the wire is provided with a crimp 4.8 which receives the forward end of a coil spring 49 the rear end of which is received by a projection 50 cast on the support. The normal function of the spring 49 is to hold the pivot portion 47 in the notch 43 and the curved rearwardly extending part of the detector against shoulder 41 thus positioning said detector for proper engagement with the surface to be detected.

In carrying my invention into further effect I provide a withdrawing wire TV having a right hand leg provided with an open hook 61 which engages both sides of that portion of the detector D located between the end 47 and crimp dB. The portion 36 is provided with a wall or shoulder 62 which guides the lower end of the hook to preventmovement to the left as viewed in Fig. 1. The cap 37 prevents upward displacement of the leg (30 and the latter is therefore held against improper vertical and lateral movement to the left.

The other leg 68 of the withdrawing device terminates in the controller 24, passing into a portion of stand 19 so that the controller 24 normally lies under actuator 21. The withdrawing wire is formed as one piece and the forward portion thereof is looped as at (34:, the sides of the loop being in substantial alignment and being so placed as to be engaged by one of the legs 17 of the transferrer lever.

Under normal conditions the parts will be in the. position indicated in full lines in Fig. 1 and as the shuttle and bobbin advance the teeth 4st will be'embedded in the yarn and the detector D will move forwardly from the full line posit-ion indicated in Fig. 1 without angular movement. The said detector moves the wires 1V forwardly to withdraw the controller 24 from under actuator lever 21 so that the latter is free to descend without interruption. lVhen insuliicient yarn for continued weaving is present, however, the teeth 4% will slide along the empty bobbin to the dot and dash line position indicated in Fig. 1, the detector D under these conditions moving around the notch d3 as a pivot. The hook 61 is so near the notch that the angular movement of the detector produces no appreciable effect on the controller 24 and the latter therefore remains under the actuator lever 21 to interrupt the downward movement of the latter and initiate replen,

ishment.

On a subsequent beat of the loom when the exhausted shuttle again arrives under the magazine the transferrer arm will be moved downwardly by mechanism not shown and one of the legs 17 will engage the wire V and move the same forwardly to the dotted line position indicated in Fig. 2, this motion of the transferrer moving the detector D to the dotted line position indicated in Fig. 1 to clear the path of the incoming bobbin and also moving the controller pin 2st from under the actuator lever 21 so that the latter may descend without repeating the indication.

It occasionally occurs that the detector must be adjusted longitudinally with respect to the bobbin and shuttle, this adjustment being permitted by the slot 32 but in asmuch as stand 19 remains fixed it is necessary to provide some adjustment to vary the distance between the legs 60 and 63. This can be done by spreading the legs apart or drawing them closer together as the case may e, the loop Gel either contracting or being enlarged according to which adjustment is made. As indicated in Fig. 6 the legs have been separated with a consequent contraction of the loop 54:. Whatever the distance between the withdrawing and controller ends of the wire V, there will always be a portion which lies in the path and under control of some part of the transferrer mechanism. For this reason the controller and detector will always be moved to inoperative position on a transferring beat independent of the lateral position of the support 35.

From the foregoing it will be seen that I have provided a very simple device for withdrawing a side slip weft detector on transferring beats of the loom, this device serving also as a controller for the actuator lever. It will further be seen that the controller is normally in operative position with respect to the actuator lever and that angular movement of the detector produces a negligible movement on the part of the controller so that the latter is in operative position on ill! GJI

indicating beats of the 10cm. It willfurtherm'ore be seen that by means of the surplus material afforded by the loop 64 I am enabled to vary the distance between the legs and 63 when lateral adjustments of the detector is necessary and thatfor all such adjustments the device is under control of the transferring mechanism.

Having thus described my invention it will be apparent thatchanges 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: V

1. In a loom weft detector having a yarn engaging element and a support, the element supported entirely by the support and being movable forwardly on the support when engaging a bobbin having sufficient weft and moving angularly about a portion of the support as a center along a bob bin having insufficient weft, an actuator, transferrer mechanism, and a member operatively connected to and moving with the element when the latter has a forward nonindicating movement, said member having a portion normally in the path of the actuator, said portion being withdrawn when he element moves when in contact with sufficient weft and remaining in the path of the actuator when the element is in contact with insufficient weft, the transferrer means engaging the member at the time of transfer to withdraw the detector from the path of the incoming bobbin, and said portion from the path of the actuator.

2. In a loom weft detector having a yarn engaging element and a support, the element supported entirely by the support and being movable forwardly on the support when engaging a bobbin having sufficient weft and moving angularly about a portion of the support as a center along a bobbin having insufficient weft, an actuator, and a controller for the actuator moving with the element when the latter has a forward nonindicating movement, said controller o -er-- atively connected to the element at a point closely adjacent the center about which the element moves when in contact with an insuflicient supply of weft.

3. In a loom weft detector having a yarn engaging element and a support, the element supported entirely by the support and being movable forwardly on the support when engaging a bobbin having suihcient weft and moving angularly about a portion of the support a center along a. bobbin having insufficient weft, resilient means to hold the element in normal bobbin engaging position, an actuator to effecta change in the operation of the loom, and a member common to the element and actuator moving with the element when the latter has a for- 4. In a loom weft detector having a yarn engaging element and a support, the element being movable forwardly on the sup- )ort when en a in a bobbin havin suffi- C b C) cient weft and moving angularly about a portion of the support as a center along a bobbin harm insuiiicient weft resilient nea'ns to'hold the element in normal bobbin engaging position, an actuator to effect a change in the operation of the loom, and a member common to the element and actuator and lying in the path of the latter when the element moves angularly when in contact with an insufficient supply of weft, said yielding means being operative to hold the member normally in the path of the actuator, said member being formed with a contractable and expansible part, whereby the distance between the actuator and element engaging portions thereof may be varied.

5. In a loom weft detector having a yarn engaging element and a support, the element being movable forwardly on the support when engaging a bobbin having sufiicient weft and moving angularly about a portion of the support as a center along a bobbin having insufficient weft, resilient means to hold the element in normal bobbin engaging position, an actuator to effect a change in the operation of the loom, and a member common to the element and actuator and lying in the path of the latter when the element moves angularly when in contact with an insufficient supply of weft, said yielding means being ope "ative to hold the member normally in the path of the actuator, said member being formed as a wire having a loop formed therein which may be contracted or expanded to increase or diminish the distance between the actuator and element engaging portions of said member.

6. In a loom weftdetector having a yarn engaging element and a support, the element supported entirely by the support and being movable forwardly on the support when en gaging a bobbin having sufficient weft and moving angularly about a portion of the support as a center along a bobbin having insufficient weft, an actuator to effect a change in the operation of the loom, a transferrer, and a member acting both as a controller means for the actuator and a withdrawing means for the element when said member is engaged by'the transfer-rel, said member moving with the element when the latter has a forward non-indicating movement and remaining under the actuator when insufficient weft for continued weaving is in contact with the detector to effect a change in the operation of the loom.

7. In a loom weft detector having a yarn engaging element and a support, the element formed of a single piece of wire supported entirely by the support and being movable forwardly on the support when engaging a bobbin having suiiicient weft and moving angularly about a portion of the support as a center along a bobbin having insufficient weft, an actuator to efl'ect a change in the loom and a member common to the .actuator and element and comprising a single piece of wire operatively connected to the element at a point closely adjacent the pertion of the support about which the element moves as a center, said member mow ing forwardly when the element is in contact with sufiicient weft so that said member is out of operative engagement with the actuator and said member remaining substantially at rest because of its location with respect to the point about which the element turns when the latter is in engagement with an insufiicient supply of weft, the member in the latter named position being operatively disposed with respect to the actuator.

In testimony whereof I have hereunto atfixed my signature.

HAROLD L. BLAIQCHrrl-ID.

Images