US1651098A

US1651098A - Weft detector for looms

Info

Publication number: US1651098A
Application number: US120195A
Authority: US
Inventors: Arthur P Paine
Original assignee: Crompton and Knowles Corp
Current assignee: Crompton and Knowles Corp
Priority date: 1926-07-02
Filing date: 1926-07-02
Publication date: 1927-11-29
Anticipated expiration: 1944-11-29

Description

Nov. 29, 1927.

. A. P. PAINE wEFT DETECTOR Fon Loous Filed JulyB. 1926 Patented Nov. 29, 1927.

STA TES ,PATENT o1-1.11cr..`

'A'.BTI-IUR P.. PAINE, OF IGR/CESTER', MASSACHUSETTS, ASSIGNOR T0 CROMPTCN @a KNOWLES'LOOM WORKS, OESWORCESTER, MASSACHUSETTS, A CORPORATION OIE' MASSACHUSETTS.

-Wnrrnnrncron non Looms.

[Application inea July 2, 192s. sanar No. 120,195.

v4This;*invention relates to improvementsin went;detectors fory looms and` it is the principal object-of the' invention to provide a detector ieryv light in its action and exerting very little; pressure on the yarn.

Vtitli-the introduction of fine yarns, such asrrayomit` hasbeen necessary to develop weftf detectors which: exert very little pressure'because' of thefact that a bobbin of line' yarn will remain active for such a. lengthof timeA that the ordinary weft detector will' fray or abrade the yarn before the latter has vbeen woven 0H the bobbin and itfis: accordingly an important object of my invention to 'provide a weft detector formed preferably of light wire-yarn engagingiportionsfwhiohare heldy in position by a small spring; Y

Weft Vdetectorsof the typev shown in patent tot Ryon. No; 972,722 have `gone into ,very extensive;- use and have been foundy very satisfactory, said. detectors beingof the socalled .doubley Contact type and having a yarn penetrating wedge-shaped detector which cooperates with an angularly moving notchedt or tnothedV yarn impinging member. Such detectors are commonly made with at leastl two-springsandv it is a. further object of my inventionv to .employ the same principleaas thatemployed in'v the Ryonl detector withgtheuse ofal singlefspring. f

VVheni detectors areplaced on the maga'- zine. end; of: automa-tic box looms it is neccssaryy toY withdraw the same en transferring beatsanditi is.- acoordinglya further objectk ofmy invention to: provide for withdrawing both of the-yarn enga-ging 'detecting membersz'on.transferring-beats` by acting on one ofi saidz detectors, therev being an interengaging connection between both detectors-so that they will be: withdrawn together without giving, an indication.

In automatic box looms` the control for thevmagazine is usually very close to the detector, masking it possible toJ have a short connection betweengt-he4 weft detector and the magazine and it is according-ly further object. of'my-invention to provide a very simple and light device for' communicating indication of weft exhaustion from the detector tothe controller which. i'scontrolled by' the laterally movable detector and positioned? by the same spring which controls the'` detectors:

` With these and other objects in view which will appear as the description proceeds,^1ny invention resides in thecombination and arrangement of parts hereinafter described and set forth inv the* claims.

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

Fig. l is a top plan view of my detector showing associated partsof the replenishing mechanlsm, parts of whichare in section,

. Fig. 2 is a front elevation of the detector taken in the direction of arrow 2, Fig.1, parts `being broken away,

Fig. 3 is a view similar .to a portion of lFlg. l with the cap of` the' detector removed .showing the parts yinthe position. they assume on the forwardk stroke ofthe lay when 1n dcontact with a suiiicient supply of weft, an

Figs. 4 and 5 are vertical sections on lines 4 4 vand 5-5, respectively, of 3.

Referring to thevdrawings it will be seen thatl have provided .a loom frame 10 to which is bolted the foot 11 ofa weft replenishing mechanism 12 provided with. a hub 13 through which extends stud 1-1' vsecnredthereto byk a setvscrew 15. Pivotally mounted on the stud is. a transferrer arm 16V having depending feet .17 between which extends a pin 18 for the transferrer latchy (not shown). l v

A bracket 19 is bolted to theloom frame and. has slidably mounted therein for vertical movementa block 2O on which is pivote'd aoating actuator lever 2l the inner end of. which is pivotally connected to .an

upwardly extending rod 22. whichv is ,'connectedy to the weftreplenishingmechanism block 20 will be given.- al downward movement and if sufficient yarn vis present the outer end will move downwardly freely in slot 24 leaving the connector 22'unmoved, but if insuiiicient yarnv is present the outer end of the actuatorV lever will be interrupted in its descent to'cause a downward moyementof the connector 22, the 'eiectof which will be to indicate for a change of operation in the loom. Thematter thus far described 1s of common construction and may be as set forth in the aforesaid patent and also inV vided with a lug 33. Said bed is further provided with guiding and bearing surfaces 34 and the rear portion of the bed is further provided with a pin 35.

Thelaterally moving yarn impinging detector'is formed preferably of a. single piece of wire 36 having the rear surface thereof notched and bent to extend parallel to the bobbin as at 37, the forward end of the wire 36 being bent as at 38 to rest 0n one of the guides 34 and then extending across the bed to `rest on the other guide as at 39. Said portion 39 normally cooperates with the lug 33 which serves as a pivot about which the detector may move. Said wire 36 isprovided with a crimpy 40 to receive the forward end of a very light tension spring 41 the rear end of which is secured to the lug or projection 35. A boss 42 preferably cast integral with the bed engages the forward part .of the wire 36 as indicated in Fig. 1, said lug and boss 33 cooperating with the spring 41 to position the yarn engaging rear end 37.

The yarn penetrating detector is indicated at 43 and has a rear pointed end 44 which extends slightly behind the teeth of the detector 36, the forward portion of the detector 43 bridging the wire 36 as at 45 and ex'- tending to the right to be supported on the. right hand guide 34. A second boss 46 cast'on the bed guides the detector 43 to prevent movement thereof to the left, lug 42 acting to prevent movement to the right. A rib 47 on the cap 31 engages the top of the bent part of wire 43 to prevent upward movement thereof. The wire 36 is extended forwardly of the bend 39 and downwardly .as at 48 as shown in Figs. 3 and 5, and to the right of the left guide 34. A withdrawing link 49 passes behind the end 48 of detector 36 and has portions resting on the` guides 34. Said link 49 is guided in the front wall of the bed 30 and is offset to lie in front of pin 18. Said end 48 lies between the pivot lug 33 and the spring 41 so .that

when being withdrawn the detector 36 willy not move angularly but will move forwardly with a right line or parallel motion.

The controller' for the actuator lever 19 is preferably formed of a single piece of bent wire indicated at 50 and has a rearwardly extending portion bent down and lunder the detector 36 and up on the opposite side thereof as indicated in Fig. 4 at 51. The intermediate portion of the controller is coiled as at 52 and extends around a pivot forming screw 53 secured in the cap 31 land the for ward portion of said controller` is ext-ended to the left as indicated in Fig. 1 and is bent rearwardly as at 54 to be guided on aV shelf 55 of the horn 23. f

- Under normal conditions the spring 41 will hold the angularly moving detector 36 inthe position indicated in Fig. 1 in fullvv lines and inasmuch as the detector 43 bridges a portion of the angularly moving detector the former will also be' properly positioned with respect to the bobbin, this result being accomplished by the single spring 41. So long as there is sufficient yarnpresent for continued weaving the wedge-shaped member 44 will enter the yarn a sufcient dis-v tance to permit the teeth on the detector 36 also to enter the yarn to restrain `lateral movement thereof, and as the lay continues to move forwardly the b'obbin B will move the detector from the position shown in Fig. 1 to that shown in Fig. 3, the curved part 39 moving away from vthelug or boss-33 and the end 54 of the controller remaining out of the path of the actuator lever 21.-

Vhen insufficient yarn for continued weaving is present, however, thewedge 44 will notpenetrate the yarn a'sufiicient distance topermitV contact of the Vlatter with the teeth of detector 36 and as the detector 43 is moved 'forwardly by the continued advancing movement of the detector the bridged portion 45 will move the adjacent part of the detector 36'forwardly. Inasmuch as spring 41 lies'between the bridge andthe lug 46 the latter will become a pivot point about which theV detector 36 will be moved to some s uch a position as indicated in dotted lines in Fig. 1. This'angular `movement on the part of the detector 36 causes a corresponding Vright hand oscilla tion of the controller 50, causing` the end 54 of the latter to pass under the outer end of the actuator llever 21 asindicated in dott-ed lines in Fig. 1. Downward movement of the actuator will therefore be resisted and inl dication of weft exhaustion will be communicated to the magazine as described hereinbefore. Y p y On the subsequent transfer the stud 18 will be moved forwardly to engage the link 49 and both detectors will be moved out of the path of the incoming bobbin, this move-vr ment on'th-e part of the wedged detector being accomplished without angular movement on the part of the angularly movable member 36because of the fact that the end 48 lies between the pivot lug 33 and the spring 41. f

From the foregoing it will be seen that 1 have provided a very light weft detector Vhaving yarn penetrating and yarn impinging elements both of which areheld in normal yarn engaging position by a single Sli-,at such, a point aswill prevent indicating movement of theilatter `on theV withdrawing movement... tpwfilligalso be noted that `the controller 'torgthe actuator lever is very light andl is positioned:J by the spring ll1 through the vU;-shap.edv connector 51.-

lllavingihus described lmyvinvention,` it will beV appa-rent that changes andinoditications may be Amade therein by those sl-Iilled in the art without departingl from the spirit and scope of the invention, andv I do not wish to be limited to the details herein disclosed, but what lclaim. is:

l. In a weft detector tor looms, a station` ary support, anangularly movable yarn impinging detector slldably mounted on. the

support and having a right line sliding motion with respect to the support when 1n contact with sufiicient weft and having an angular motion with respect to the support when presented to an insuliicient supply lot wett, resilient means holding the'detector in normalposition, and a second detector having a yarn penetrating part extending beyond the yarn impinging detector to enter a su'ti'icient supply of weft, said detectors being connected together, said second detector when in engagement with insutlicient yarn moving the first detector before the same engages the yarn to move Ysaid tirst detector angularly and the resilient means acting to give the impinging the detector an angular' motion.

' 2. ln a wett detector for looms, a stationary support, an angularly movable yarn im- Y pinging detector slidably mounted on the support and having a right line sliding motion with respect to the support when in contact with suiiicient weft and having an angular motion with respect to the support when presented to an insuliicient supply ot weit, resilient means holding the detector in normal position, a second detector having a yarn penetrating part extending beyond the yarn engaging surface of the' impinging detector, and a connection between the detectors lying between the yarn impinging detector and the resilient means to cause angular movement ot' the impinging member by the action of the resilient means when the penetrating detector engages a bobbin supplied with insutlicient weft.

3. In a weft detector for looms, a stationary support, a yarn impinging detector slidably mounted on the support, means delining a pivotal connection'between the detector and the support, said detector sliding torwardly in the support without angular motion when in contact with sufficient weft, a second detector having a yarn penetrating `part extending beyond the yarn engaging surface ot theimpinging detectormeans denning an; operative.V connection betWeenthe detectors, and resilient means' connected:w to

thelimpinging.detector at appointpbetween the pivot of thesame andthe operative; connection between the detectors, said penetrating detector when in. Contact with a bobbin with insufficient weft moving, the impinging detector forwardly beforev thev same ,can`r en- 'gage theyarn on .the bobbin, the resilient means under these conditions causing, a-ngir lar movement of the impinging detector.

e. In .a weft detector for looms, a stationary support, a yarn impinging detector slidably mounted on'the support, means. defining a pivotal connection between the detector and thesupporh said detector. sliding forwardly in the support without angular motion when in contact with suliicient weft, a secondl detector having a yarn penetrating part extending beyond the yarn engaging surface of the impinging detector, means delining an operative connection between the detectors, resilient means connected to the impinging detector at a point between the pivot of the same and the operative connection between the detectors, said penetrating detector when in contact with a bobbin with insuilicient weft moving the impinging detector forwardly before the same can engage the yarn on the bobbin, the resilient means under 4these conditions causing angular movement of the impinging detector, an actuator to elect a change in the operation of the loom, and a controller pivoted on the supportand having a part operatively connected to. the vangularly movable detector and having another part to cooperate with the actuatorat the time of angular motion of the yarn impinging detector.

5. In a wett detector for looms, a stationary'support, a yarn impinging detector slidably mounted on the support, means defining a pivotal connection between the detector and the support, said detector sliding forwardly in the support without angular motion when in Contact with sufficient weft, a second detector having a yarn penetrating part extending beyond the yarn engaging surface ot the impinging detector, means defining an operative connect-ion between the detectors, resilient means connected to the impinging detector at a point between the pivot of the same and the operative connection between the detectors, said penetrating detect-or when in contact with a bobbin with insullicient wett moving the impinging detector forwardly before the same can engage the yarn on the bobbin, the resilient means under these conditions causing angular movementA of the impinging detector, an actuator to effect a change in the operation of the loom, and a controller pivoted on the support and having a part operatively con- Inected'to the angularly movable detector and theyarn impinging detector, said controller being` in contact with opposite sides of the angularly movable detectorI to be moved positively by the latter, the resilient means servingtherebyto place the controller as well as the detectors in normal position.

6. In a weft detector for looms, a stationary support, an angularly movable yarn impinging detector slidably mounted on the support and having a right line sliding m` tion with respect to the support when in contact with sn'llicient welt and having an angular motion with respect tothe support when presented to an insufficient supply of weft, resilient means holding the detector in normal position, a second detector having a vyarn penetrating partextending beyond the yarnengaging surface ofthe impinging detector, a connection `between the detectors lying` between the yarn impinging detector and the resilient means to cause angular movement of the impinging member by the action of the resilient meansl whenthe penetrating detector engages av bobbin supplied with insullicient weft, and lmeans operatively connected to one of the detectors to'with-.

ARTHUR l?. PAINE.