US1142121A - Weft-detecting mechanism. - Google Patents

Description

E. H. RYON.

WEFT DETECTING MECHANISM.

APPLICATION HLED SEPT. 1e, 1914.

1,142, 1 21` Patented June 8, 1915.

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1HEl MORRIS PETERS CO., PHVOTDALITHO., WASHINGTON, D, C.

E. H. RYON.

WEFT DETECTING MECHANISM.

APPLICATION FILED SEPTJB, 19H.

1 ,142,121.l Patented June 8, 1915.

2 SHEETS-SHEET 2.

THE NORRIS PETERS 50 PHOTO-LITHU.. WASHINGTON, D C,

TiniTnn sTa'riijs PATENT onirica EPPA H. BJYON, OF WA'LTHAIVI, MASSACHUSETTS, ,ASSIGNOR '.lO` CROIVIPTGN & KNOWLES LOOM WORKS, 'OF WORCESTER, ,MASSACHUSETTS, A CORPORATION 0F MASSACHU- SETTS.

" of Massachusetts, have invented anew and useful left-Detecting Mechanism, of which the following is a specilication. t

This invention relates to a weft detecting mechanism and particularly to a detecting mechanism of the pneumatic type. Such mechanism has been heretofore known but has usually operated upon a pressure sys- 1 tem in which the weft .replenishing devices have been maintained inoperativeuntil the pressure in thekpneumatic devices was reduced by the opening of an exhaust valve. Apparatus'of this type, while capable of very sensitive operation, is dependent for itsr operation upon the maintenance of pressure higher than atmospheric. If for any-reason this pressure is not maintained, the

whole rdevice becomes inoperative. Furthervmore, the number of working-parts to the loom is materially increasedbv the addition of the necessary air compressing apparatus. It isfthe principal object of'mypresent yinvention to provide an improved pneumatic weft detecting or feeler lmechanism in which the airpressure never exceeds atmospheric' and no Vauxiliary air compressing apparatus is required.

With this object in view,` my invention contemplatesl the f provision Y of a weft detecting mechanism in which the mechanism is operable tol permit the transfer of filling carriers when the pneumatic device is openedl to the atmosphere but in which the transfer is prevented as long-as the passage from said pneumatic device to the atmosphere is closed during the operation ofthe feeler.v

` .My invention further consists in certainvv devices, arrangements andcombinations. of

parts which will be hereinafter describedv and more specifically pointed outin the appended claims.

A preferred form and a modification are shown in the drawings, inwhich- Y Figure 1 is a front` elevation of the preferred form of my invention, showing alsoA certain parts of the weftj replenishing andv controlling devices; Fig. 2 is a top plan view of the preferred form; in operative relation to a full wefticarrier; Fig. 3 is a viewl f similar kto Fig. 2 but showing the feelercooperating with a substantially-*exhausted Specification of .LettersV Patent.v

Patented Jane s, 1915.

Application led September 16,1914. Serial No. 862,101,

weft carrier; Figs. 4 and 5 are sectional views Vtaken along the vline 4'5 inf Fig. 1 andv showing partsv in positions corresponding to Figs. 2 and '3, respectively; Fig. 6 is an enlarged detailview of the end of the feeler slide; Fig. 7 is a partial side elevation looking in the direction of the arrow 7 in Fig. 1; Figs. 8 and 9 are sectional plan views of a modification, showing thegparts'in two positions; Fig. 10 is aside elevation Vof the modification, corresponding in position to Fig.7, and Fig. 11 is a side view of theslide. shown in Fig. 6. j

rlhat portion of my improved weft detect-V ing mechanism which coperates with -the weft carrier comprises a feeler slide 10 mounted ina vguide 11 secured to the'loonu` frame and normally-maintained in rearward position by a spring 12, positioned between lug 13 on the guide 11 and-a projection 14 on the slide 10.

A; rod 15 of relatively smalldiameter is slidably mounted in the slide l0, said rod being screw-threaded atV itsv forward endV and provided with a detecting point 16 at its rear end. Therod 15 also has secured thereto a collar 17 (Fig. 6)- and is surrounded by a coiled spring 18 positioned between the collar '17 and a vbearing 19 secured to the slide 10. l L

A nut 20 is mounted upon the forward threaded end of the rod 15,said nut being j provided with notches 21(Fig. l) adapted to receive aspring wire 22 lmounted upon the slide 10 and movable therewith. VBy means of the nut 20, theposition of the detecting point 16 relatively'to the rear end of the slide'lO'may be adjusted, said adjustmentsv being maintained by inserting the wire 22 in one of the notches 21. In addition to positioning the detecting point, the nut v20 performs an additional function which will be hereinafterdescribed.

The slide' 10 carries at its forward end al laterally projecting disk-shaped member -30 (Figs. 1 and 3) having a concave recessI in its rear face. This face of the member 30, in the preferred form, is covered by a diaphragm 31 of leather, rubber, or lother suitable material. To the outer face of the diaphragm there is secured a U-shaped casting 32 carrying a stud 33 slidable .in-a' fixed bearing 34 mounted upon the loom frame. The casting 32 may be lsecured to the diaphragm by a screw 35as shown in Figs. 4

ict

` shown in Fig. 2.

and 5, and the'disk-shaped member 30`may be recessed as at 36 to provide clearance for the screw. lThe concave recess 1n the member 30 isconnected by a passage 37 to a short transverse passage 38 concentric with the rod 15. The passage 38 is so positioned that it will be'covered and closed by the nut 20v whenv'the nut is Vforced against the front face of the slide 10 under the influence of the spring 18. Y Y

An arm 40V (Fig. 7) mounted upon a short shaft 41 extends upwardly into the kpath of movement of the casting 32 (see Figs. 4 and 5.). The shaft 41 isrotatable in fixed bearings iii the loom frame and is surrounded by a coiled spring'42gtendingconstantly Ato forcethe arm 40 rearwardly `against the casting32. .et itsopposite end the stud 41V car-ries an arm 43 to which is pivotally con` necteda slidingjrod 44 (Figs. :2 and 3)'.

Thel rod 44 is movable 'into and outof the path of a floating lever45 pivotally' connect ed to the end of a vertically movable rod 46.' A t its left-hand end, as Viewedin Fig. 1, tlief lever 45 connected through Va link 46a to, a lever 47 positioned, to actnate anV operated, said mechanism remaining; inop.-

erative s o longl asthe rod is Withdrawn at each alternate forward beat of the,l lay, as

I flavijngr thus described the constructionV of the preferred form of my invention, its op# erationwill be-*readily understood.V 1When the layis on or near its back center, the slide 1Q willbe forced rearward by the spring 12,

which movement will continue until the castf` ing` 32 engages the bearing 34and the diaphragm 31 is forced into theposition shown in Fig. 4. At the same time thedetecting point 16 isY free 13o-move, rearward and the nut 20, is brought into position to lcover the ypassage. v38. As the lay moves forward, the' ends ofthe slide 10 the detecting point 16y engage the. filling.V If a suiiicient amount of Villing remains, upon the weft carrier, the

point 16 'willenter'the soft filling. and will not be. forced forward to. open the. passage 38. Theslide 10 then moves forward with the passage 3 8 closed. As there is no access for air between the member 30v and the diaphragm 31, the diaphragm must follow the.v movementv ofl the member 3 0. The dia- The phragm accordingly moves forwardwiththe disk shaped member, and carriesthe casting 32with it. The "casting 32 is at alltimes engaged vby the armv40 which is thus partially rotated, turning the vstud 41 and withdrawino' the rod`44 the )arts then occu Yin(r the o l P5 s position shown inV Figs. 2 and 4.

' "When the iilling upon the weft carrier becomes substantially exhausted, the detecting `point 16 engages the barrel of the bobbin and is forced forwardly,vrelatively to the slide 10, as shown inv Fig. 3. YThis movement of the `point 1 6 and the krod 15, relatively to the slide 10, uncovers the passage 38 thus opening the recess'behind the dia` phragm 31to the atmosphere. `As the slide 10 moves forwardiy, the air VVrushes in through the passages 38 and 37 and fills the space. behind the diaphragm. There is Vthen v no force tending tomove the casting' for ward andthe arm 40, stud V41 and the rod 44' accordingly remain in the position shown in Figs. 3 and 5. [The weft repleni'shing mechanismis; thus permitted to operate to su. Y

ply a freshjweft carrier to the shuttle.y will thus beseen that no air#compressingv del vicesv of any sortl are necessary forthe operation of- Vmy pneumatic feeler, the. entire operation being controlled by the opening and closingof the passage. 38 by the nut Q0.

In Figs. 8, 9 and 10 I- have. show-n a modified form ofumy invention, the operation,

howeverl being. substantiall the,y same. VIn

a c y this form V the slide 10V carries a lateral projection 50. havingv a. cylindrical recess in its rear face within which is slidable a-piston 51 havinga rod 52extending forward Vthrough the projection 50-andeng'aging thev arm 40 previously described.

. The recess in the projection .50 is connect-V ed bya short passage 53 to a'conical-recess 54 surrounding thek rod 15. VUpon its threaded forward end the rod-'15 carries aconical Y plunger` 5 5V maintainedin adjusted position thereon by a check nutV V56.

An adjustable stud 57i is mounted upon' the guide-11 and extends into. the open rear side of' the piston 51. The stud 5.7 engages" the forward end of .the piston fand acts to restore it to the position shown 'in Figs.

and 10- as'the slide moves rearwardly, the

stud also controlling the extreme position of the slide.

The admission of air' to the cylinder is rearward controlled by the position of therod l5 as' inthe preferred form andthe mode. of operation is unchanged.

The rearward posit-ion of the slide'may be conveniently determined 'by' adjusting the stud longitudinally` '.Having thus described two forms of my invention, it will be evidentl that other changes .fand Vmodifications can be made therein by those. skilled in the` lart without departing from thesspirit and scope.- tereof asset-forthin the claims, and'I dofnot Wish to be limited to the details herein disclosed',

but

' What I do claim'is:-l Y

1. In a loom, in combination, Wett replenishing mechanism, a Vweft detecting device, and means controlled by said Wet detecting device effective'to determine the operation of said weft replenishing mechanism, said means comprising a normally-collapsed pneumatic device having a passage to the atmosphere, and a member for closing said passage, said member being controlled by said weft detecting device.

2. In a loom, in combination, vveft replenishing mechanism, a weft detecting device, and means controlled by said weft detecting device effective to determine the operation of said vveft replenishing mechanism, said means comprising a normally-collapsed pneumatic device having a passage to the atmosphere, and a closure for said passage,l

said closure being directly controlledV by said weft detecting device and being moved to open said passage When the weft detecting device contacts -vvith a substantially eX- Vhausted weft carrier.

k3. In a loom, in combination, vveft replenishing mechanism, a Weft'detecting device,

and means controlled by said weft detectingV device effective to determine the operationV y detecting device.

4. Ina loom, in combination, vveft replenishing mechanism, a weft detecting device comprising a eeler slide and a detecting point, and means controlled by said weft detecting device efi'ective to ydetermine the operation of said'weft replenishing mechanism, ,saidV means comprising a normallycollapsed pneumatic device having a passage to the atmosphere, and a closure for said passage, said closure being controlled in its operations by the relative positions of said feeler slide and said detecting point. I

5; In a loom, in combination, weft replenishing mechanism, a vvet detecting device comprising a feeler slide. and a detecting point, and means controlledby said vveft detecting device effective to determine the yso operation of said weft replenishing mechanism, said means comprising'a normallycollapsed pneumatic device having a passage to the atmosphere, and a closure for said passage, said closure being mounted to move with said detecting point relative to said slide'to open said passage upon the substantial eXhaustion of vveft on the indicated weft carrier.

6. In a loom, in combination, weft replenmeans controllingthe operation of said vveft replenishing mechanism, a spring to move said means to operative position, and a pneumatic device having a passage tothe atmosphere, said pneumatic-'device being mounted to move Vforivar'd'with the lay, and being effective to move said controlling means out of operative position if said passage remains 1closed during the forward movement of the aya Y Y 7. weft detecting device comprising a feelerslide, a detecting point carried by said slide and yieldingly movable therein, a pneumatic device connected to the Weft replenishing mechanism and having a passage tothe atmosphere Which constitutes the only opening to said device, and means movable With said detecting point and normally closing said passage to prevent the operation of said weft replenishing mechanism.

8. In a loom, a weft detecting device comprising a feeler slide, a rod having a detecting point supported on said slide, resilient means to hold said rod in rearward position relative to said slide, a pneumatic device connected to control the Weft replenishing mechanism and having a passage to the atmosphere Which constitutes the only opening to said device, and a closure for said vpassage mounted on the forward end of said rod and normally moved by said resilient means into position to close said passage.

9. VIn a loom, in combination, weft replenishing mechanism, a Weft detecting device, and means controlled by said weft detecting device eifective to determine the operation of said vveft replenishing mechanism, said means comprising a normally-collapsedy pneumatic device having a passage to the atmosphere and a member normally positioned by said vveft detecting device to close said passage, said pneumatic device comprising a recessed disk, a diaphragm covering the recess, and connections from said diaphragm to said weft replenishing mechamsm.

10. Ina loom, in combination, weft replenishing mechanism, a Weft detecting device, an arm connected to control the operation of said Weft replenishing mechanism, and means controlled by said vveft detecting device effective to determine the actuation of said arm, said means comprising a movable recessed disk having a passage to the atmosphere, a diaphragm covering the recess, and a device mounted on said diaphragm and engaging said arm, said weft detecting device having a member normally closing the passage in said disk and eective to open said passage on the substantial eX- haustion of vveft on the indicated weft carrier. i

11. In a loom, a weft detecting device comprising a feeler slide, a rod having a detectng point; supported on said slide, resilient means to hold said rod in rearward position relative to s aid slide7 a pneiimatieV device movable with said slide and connected to Control the weft replenshing mechanism,

v said device having. a passage tov the atmosphere, and a olosilire for said passage adjustably mounted on the forward erld of said rod and normally moved by said resilient lnlealusv into position to close 'said pas,- 10

sage. y Y v In testimony whereof I have hereuntogset my hand, in the presence of @we subsribing witnesses: o Y e EPPA RYON- Witnessesr GaAs., Ta HAWLEL B,- SWE.

Copies of this patent may be obtained for ve oents cavoli, by agqressgg 'che Commissioner of Patentes, Y Y Washington, 1),. C.f

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