US2135155A

US2135155A - Loom with shuttle changing and loom stopping mechanism

Info

Publication number: US2135155A
Application number: US181754A
Authority: US
Inventors: Richard G Turner
Original assignee: Crompton and Knowles Corp
Current assignee: Crompton and Knowles Corp
Priority date: 1935-03-06
Filing date: 1937-12-27
Publication date: 1938-11-01
Anticipated expiration: 1955-11-01

Description

NOV. 1, 1938. R- G TURNER 2,135,155

LOOM WITH SHUTTLE CHANGING AND LOOM STOPPING MECHANISM Original Filed March 6, 1935 6 Sheets-Sheet l Richard ,Greemeai Turner AHorney Nov. 1, 1938. R. G. TURNER 2,135,155

LOOM WITH SHUTTLE CHANGING AND LOOM STOPPING MECHANISM Original Filed March 6, 1935 6 Sheets-Sheet 2 ATTORNEY Richard Greereaf Turner R. G. TURN R Nov. l, 1938.

LOOM WITH SHUTTLE CHANGING AND LOOM STOPPING MECHANISM Original Filed March 6, 1935 6 Sheets-Sheet 3 @l I N VEN TOR.

Rich ard Greemen Turner A TTORNEY R. G. TURNER` Nov. l, 1938.

LOOM WITH SHUTTLE CHANGING. AND LOOM STOPPING MECHANISM Original Filed March 6, 1935 6 Sheets-Sheet 4 INVEN TOR. Richard Greerea Turner BY l ATTORNEY R. G. TURNER Nov. 1, 1938.

LOOM WITH SHUTTLE CHANGING AND LOOM STOPPING MEGHANISM Original Filed March 6. 1935 6 Sheets-Sheet 5 1N V EN TOR. Richard Greenkea Turner a@ .f wat A TTORNEY Nov. 1, 1938. R. G. TURNER 2,135,155

LOOM WITH SHUTTLE CHANGING AND LOOM STOPPING MEGHANISM original Filed March @[19:55 e sheets-sheet e Z BB INVENTOR. Rhard Gveemea Turner ATTORNEY Patented Nov. 1, 1938 `WITH SHUTTLEA CHANGING AND sLOOM- STOPPlNG` MECHANISM Richard 'GQ Turner, Worcester, Mass., assignerI i to Crompton & Knowles Loom Works, Worcester, Mass., a corporation of Massachusetts `f or'ignmi application Mai-ch s, 1935, serial No.

Divided and this application December t a ,"27, 1937, Serial 'Nor 181,754 A i 12 Claims. This isa division of myco-pending application Serial No. 9,645 led March 6, 1935. This invention .relates to improvements in fancy or multishuttle box looms `and it ls the general object of the invention to provide such a loom which is capable of replacing 4certain, of the weaving shuttles when their'weft supplies are practically exhausted and to stop the loom when the weaving supplies of certain other of the shuttles'are substantially exhausted.

In the Weaving of certain fabrics which cal for several kinds of weit it frequently occurs that twocolors predominate while one or two other colors are used infrequently for decorative purposes. In such a loom there is less need for automatic renewalof the running weft in the infrequently used yweaving shuttles than is the case with those shuttles which are in more frequent action. My present invention provides an eflicient and comparatively simple loom which changes a part only of the running shuttles automatically and stops the loom when exhaustion approaches in the other shuttles, so that they may be replenished by hand.

It -is a further object of my present invention to provide a single weft detector on the magazine end of the loom to detect the condition of each running shuttle when at that end of the loom. By such a feeler I am able to keep any shuttle in action as long as desired and am not restricted to any denite or limited sequence as is the case with certain multishuttle shuttle changing looms heretofore proposed. The detector gives the indication which initiates either shuttle changing or loom stoppage, depending upon which of the several shuttles is empty.

It is a further object of my present invention to provide two'separate loom controllers, one a shuttle changer: and the 'other loom stopping mechanism,l both of which arev under control of a single weft detector, together with a part moving in timed relation with `the box motion which -controls the Yshiftingc'r drop boxes. The shuttle changing controller mayin'clude selector mechanism for the shuttle changing magazine to a'iord a choice of changing operations, while the`v stopping controller will have but one mode Aof operation, with' the sameir'esuln namely stopping whenever lthe less lfrequently vused vshuttles are exhausted. By this arrangementthe single weft detector initiates alli'of the 'changes'whichare' to bring about yan alteration in loom operation' either changing or stoppingQwhile the part mov- (ci. 13s- 232) upon an infrequently active shuttle comes into action and acts through the detector to stop the loom. Upon resumption of weaving the shuttle rst to indicate will ultimately become active again and will be replaced by a similar reserve shuttle uponits arrival at the magazine end of the loom, the indication for such a change having been retained.

When the weft feeler is on the magazine end it must be Withdrawn at the time of exchanging shuttles to prevent breakage and a repeated indication. Since certain of the shuttles in myimproved loom do notcoact with the shuttle changing mechanism butare replenished by hand the feeler will not` be withdrawn in such instances and in order to prevent a continued ow of current through a detector circuit during loom stoppage I arrange to box those shuttles which act to stop the loom on the side opposite the feeler when the loom is stopped. In this way an exhausted loom stopping shuttle is out ofl contact with the feeler to prevent burning of the latter, l

and a repeated indication cannot be given.

It is another object of my present linvention to employ the shuttle changing and loom stopping means `together with a warpl stop motion and so time the parts that when the loom is stopped because of approaching exhaustion the shuttle needing replenishmentwill be at thev4 drop Lbox side of .the loom'whereas .when-ythe-.loom is` stopped because ofr a warp fault it will .come on the intervening pickA or .beat` of .the yloom when the; active shuttle islonthe opposite .or magazine side of the loom. Bythis relation the weaver can' tell at a glance `whether rtheloom was stopped by weft` or warp fault.. a Y

I am aware thatit has such looms are' vnot entirely 'satisfactory in. the

weaving of'certai `fabricsbecause oi the fact that the shuttle is not 'fullykthreaded onthe rst pick after transfer, and. also'jthe .thread end ex-` tending `from the; outscmglfbohbm-1surea-io be y a been vproposed hereto-j. fore to u sje" multiboxjloomswithvbobbinchanging attachments, but practicalexperience shows that drawn back into the shed to form a double pick. That part of my present invention which relates to renewal of the weft employs shuttle changing mechanism which places in action a shuttle which is fully threaded and completely removes the trailing weft end with the old shuttle. g

The warp stop motion is ordinarily capable of giving an indication of warp fault at any time including that period in the cycle of the loom when the weft detector gives its indication. Where the loom stopping control for both the warp stop motion and the detector is exercised through asingle solenoid there is an opportunity for the warp stop motion to excite the solenoid at the time the feeler is detecting on a full bobbin and a false indication for weft stopping might therefore result with the shuttle boxed in the shifting boxes. It is a further object of my invention to prevent such improper stopping by interrupting the circuit of the warp stop motion so that it cannot give an indication to the common controlling solenoid at the time the weft detector is having its detecting action.

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 drawings wherein a convenient embodiment of my invention is set forth,

Fig. 1 shows the forward part of one end of the loom having my invention applied thereto,

Fig. 2 is a view of a part of the opposite end of the loom showing four shifting shuttle boxes together with the box motion,

Fig. 3 is a plan taken in the direction of arrows 3-3, Fig. 2,

Fig. 4 is a view similar to a portion of Fig. 2 with the parts in a dierent position,

Fig. 5- is a view on an enlarged scale of certain of the structure shown in the lower part of Fig. 1,

Figs. 6 and 7 are diagrammatic views showing the structure of Fig. 5 in different positions,l

Fig. 8`is a transverse section on line 6 6, Fig. 5 on an enlarged scale,

Fig. 9 is a diagrammatic view of the electric circuits,

Fig. 10 is a transverse section trough the lower interior part of the loom,

Fig. 11 is a plan view in the direction of arrow Il, Fig. 10,

Fig. 12 is a horizontal detailed section on line I2-I2 of Fig. 10,

Fig. 13 is an enlarged vertical section on line I3-I3 of Fig. 5,.

Fig. 14 is a plan view of the parts shown in Fig. 13 taken in the direction of arrow I4, and

Fig. 15 is a detailed horizontal section on line I 5- I 5 of Fig. 5.

In the drawings I have shown several known mechanisms which cooperate with themselves and other new parts to carry my invention into eiect. These known parts comprise the multishuttle magazine, the shuttle changing boxes and their lifter motion, selector means to determine which front and back stacks of reserve shuttles I6 and.

I1, respectively. The front stack of shuttles is supported in' part by a lever I8 having a finger I9 to pass under the bottom front shuttle. A link connects lever I8 with a second lever 2| pivoted to the magazine and operated by Aa rod 22 which extends down toward the lower part of the loom and has adjustably secured thereto a hook 23.

The back stack of shuttles rests on a floor 24 and a plunger 25 is arranged to move the bottom rear shuttle forwardly into the compartment C located under the bottom front reserve shuttle. This plunger 25 is moved by a lever 26 operatively connected to a second downwardly extending rod 21 having a hook 28. A spring 29 may be used to return the plunger to its rear position. The magazine may have other parts not shown herein but set forth more specifically in my United States Patents Nos. 2,054,171 and 2,054,172. It is sufficient for the purposes of the present invention to statethat if rod 22 be depressed by mechanism to be described a front reserve shuttle will be released to fall into the space C and that when rod 21 is depressed the bottom rear reserve shuttle is moved forwardly into the compartment. Any shuttle arriving in the compartment is ready to be moved to the lay and into action.

'I'he means for actuating the rods 22 and 21 may comprise a changing box lever having a lifting ledge 3| and pivoted abouta fixed stud 32. lIhe forward end of this lever 30 is connected by means of a two-part yielding link 33 to an upwardly extending box rod 34 to support upper Weaving box 35 normally in active position and lower auxiliary-box 36 belowl the race and unoccupied. l y

A lifting lever 3 1 is also pivoted to stud 32 and is rocked by means of cam 42 so that the forward end thereof moves upwardly every second beat of the loom shortly after the active shuttle is boxed on the shifting shuttle box side of the loom. A dagger v38 is movably mounted on the lifter lever 31 and normally clears the ledge 3| when rising, but is movable under ledge 3I by either of two trips r39 and 40, see Fig. 5, so as to raise lever 30. The rear end of lever 30 is provided with a lugA 4I which moves down whenever the latjch 38 raises the forward end of lever 30 and this lug has engagement with one or the other of the hooks already described.

The .selecting mechanism for determining which of the hooks is to become operatively related with the stud 4I comprises a selector lever 43 pivoted as at 44 to a bracket 45 secured to the stud 32 in fixed position. 'I'he upper end of this lever is arranged to. guide the hooks so that the same move backand forth with thev rocking of the lever 43. When the lower arm 46 of lever 43 is pulled to therleft by a. cable 41 moved by the shifting boxesthe forward hook 28 is under the stud-4*,I'ghbut when the cord or cable 41 is slackenedair coil spring "482. attached to the lever 43 rocks the latter so thatthel hook 23 moves forwardly and'under tliestud 4I.

Rocking 'of the lever. 43 is operative through a rod 49 to move a slide50 on aguide rod 5I to vary the position of the

trips

39 and 40 so that but one of them can be positioned at a time to throw the latch 38 toward the ledge 3|. A solenoid 52 is mounted on lever 30 and has a core 53 connected to a ro'cking trip 54 movable in a vertical plane xed with respect to lever 30. The parts are shown more'clearly in Fig.- 13, where the hub 55 of a carrier 5I! is shown as mounted for sliding movement on rods 8| carried by lever 30,. 'Ihe carrier supports the

latches

39 and 40 and when moved by rod I9 places one or the other of the latches in vertical alignment with 5 the trip. 'Ihe solenoid acts to rock the latches softhat the lower end of the latter will swing from the normal inactive position at the right over toward the edge to direct dog 39 into lifting relation with the lever 30. The carrier .50 isnot 10 limited to the two positions corresponding to the two stacks of reserve shuttles in the magazine, but is capable of additional sliding motion for a purpose to be described.

The detector mechanism in this instance is illustrated as a double prong electric feeler D, see Fig. 1, fastened to a lever 60 and pivoted as at 6| to a bracket 62 secured to and extending forwardly from the magazine frame. Lever 60 has a finger 63 which is connected to a tension spring 64 operative normally to hold the detector in rearward detecting position with a stopv screw 65 adjustable to determine the correctA position of the prongs 66 and 61 of the detector. v

The prongs 66 and 61 are normally so placed that they enter the active shuttle which is in the upper box on alternate beats as the lay L moves forwardly with the active shuttle on the magazine side of the loom in box 35. The detectors may if desired move through a binder 69 mounted on 30. the lay and not sharing the vertical motion of the boxes. The object in mounting the detector on a movable support is to permit the same to be moved forwardly at the time of shuttle change shuttles.v

At the opposite end of the loom provision is made for accommodating a series of weaving shuttles, four being set forth herein of which but one only will be active at a time. These cells are shown at 10, 1 I, 12 and 13 and accommodate shuttles CS' CS2, SS' andSS, respectively. As contemplated at present each of these weaving shuttles will return tothe same cell at the shifting shuttle box side of the loom and will ordi- 5 narily enter the upper cell 35 at the opposite side except on shuttle changing beats of the loom. These cells are mounted on a rod 15 which is connected as indicated in Fig. 2 to the lower end of a link 16 in any approved manner. 'Ihe latter nu' is adjustably connected to the forward end of a. box lifter lever 1'| pivoted as at 18 to an arm'19 movable about a xed stud 80. Stud 18 there--v fore constitutes a floating pivot for the lever 11 and by combining various movements of lever 55 11 and arm 19 the llnk'16 is given four diiferent positions.

Any well-known means may be used to accomplish this result, but I have shown herein a pair of links 8| and 82 which are connected at 60 their upper ends, respectively, to lever 11 and arm 19. These links are connected at their lower ends to

cranks

83 and 84, respectively, which move about stub shafts 85 and 86, respectively. 'I'hese latter shafts are movable independently of each other by a force derived from the bottom shaft 81 and they are controlled as to the time of their operation by pattern mechanism not shown and also sliding teeth on mutilated gears. `For further details of the box motion reference 70 may be had to patent to Lundgren No. 1,679,616. By relations which `are well understood the up and. down motions of the two links 8| and 82 can be combined to give the shifting shuttle boxes any Ione of four positions.

The loom stopping mechanism is shown in Figs.

so that it will clear the incoming and outgoing 1 and 10 where it will be seen that the usual form of shipper handle 90 on shipper shaft 9| has the lower end thereof connected with aknock-ofl rod The latter is attached to the upper end of an arm 93 pivoted as at 94 to a knock-off housing 95. A rocking actuator arm 96 is moved by a cam 81 on bottom shaft 81 to have a risingand falling motion on alternate beats of the Aloom to give a nger 98 thereof first a working and then a non-working stroke. Arm 96 may move about a pivot' 99 also carried by the housing 95.

A solenoid located in the housing has a core |0| which4 is normallyA down and operatively connected to a transmitting link |02 pivoted as at |03 to the arm 93 and having the left end thereof normally below the path of the iinger 98 when the latter has a working stroke. Upon energization ofthe solenoid the core is raised to lift the link |02 so that the same lies in the path of the finger 98, and as cam 91 gives the arm 06 a working stroke, the link is given a longitudinal motion to rock arm 93 forwardly and act through rod 92 to move the shipper handle rearwardly or to the right in the position shown in Fig. 1 to stop the loom. 'I'he mechanism for stopping the loom just described may be similar to that shown in patent to Payne No. 1,873,465.

An upright lever |05 pivoted to the loom frame carries a rod |06 which extends rearwardly to have connection withr a spring |01 that normally acts to hold said lever |05 rearwardly. A clipl|08 adjustably mounted on the rod |06 is connected by means of a spring |09 to the stem ||0 of a switch to be closed when the shipper handle is in vdriving position but open when the shipper handle is in stopping posi- A tion.

Reference to Fig. 11 shows that the arm 96 is forked at its rear end, fork |16 cooperating with the cam |15. The latter is adjustable angularly on the bottom shaft so that the loom can be stopped with the lay about in protection position when the active shuttle is on the magazine side of the loom or in box 35.

The several mechanisms just described of themselves form no part of my invention and may be operated andconstructed in the usual manner. g y

As previously stated my present invention relates to means for replacing either of two of the weaving shuttles when vexhausted and stopping the loom when one or "the other of the two remaining shuttles is depleted. The controls to determine whether the shuttle changing mechanism or the loom stopping mechanism shall operate are exercised primarily by the pattern mechanism acting in the presentinstance through the box motion.

By referring to Figs. 2, 3 andf4, the box motion shown therein is capable of.giving four positions to the shifting shuttle boxes which are determined by the positions of links 8| and 82. Shuttles CS and CS2 are those which are to be changed or replaced by fresh shuttles, while shuttles SS and SS2 eiect loom stoppage. Whenever box or 1| is opposite the race the rear link 8| will be in high position, link 82 being down when box 10 is in'picking position and up when box 1| is in picking position. When boxes 12 or 13 are to be aligned with the race the link 8| will be down as shown in Fig. 4, and link 82 will also be down when box 12 is active and up as shown in Fig. 4 when the lowest cell or box 13 is in picking position. A simple control can be crank 84 by 4means of spring 48 acting through lever 43.

A- disabling lever |24 has a forward arm provided with a rollk |25 to coact with a cam |25.-

y`When either of the upper two cells is to be active the link 8| will be raised and the cam |28 given such a position that roll |21 is on its low dwell, thereby permitting roll |25 to move away from the cam |26 by gravity. In this position therefore roll, |22 and the positioning lever can respond to lcam |23, being on the low dwell |30 when the boxesare in their lowest position and on the'high dwell |29 when shuttle box 1| is in picking position. With link 8| raised therefore the lever 43 can have the same character of selecting motions as have been heretofore described in my United States Patent No. 2,054,171 and 2,054,173.

From the description it will be seen that whenever the shifting is conned to boxes 10 or 1| the carrier 56 will slide to place one or the other of the

latches

39 or 40 under the trip 54 and the loom will operate as a two-color shuttle changing loom, the shuttle changing mechanism being in timed relation with the active shuttle CS or CS2, as the case may be.

When either of the lower shuttle boxes 12 and 13 is to be active, however, link 8| is down in the position shown in Fig. 4 and cam |28 takes such a position as a result of the reversal of crank arm 83 asto place follower |21 on the high dwell |3I. 'I'his causes roll |25 to push cam |26 and the positioning lever to the third or neutral position shown in Fig. 4. This additional movement of the positioninglever gives an increased motion to cable 41 and a corresponding shift to the' lever 43.

The

hooks

23 and 28 will occupy one of two positions when either of the upper pair of shuttle boxes is in picking position and these hooks together with the control lever 43 will under those conditions operate as in my aforesaid Patent No. 2,054,173. When the lever 43 is given its additional motion incident to the activity of shuttle SS' or SS2 provision must be madey to prevent damage to the hook. This result I accomplish by means illustrated in Figs. 5, 6 and 7. Hook 23 will ordinarily pass through'a hole |33 in the lever 43, see Fig. 15, and will therefore be vpositively positioned by the latter when said lever rocks in either direction. Hook 28, on the other hand, lies in a 4slot |34 which is open at the iront end thereof to receive a pressing nger |35. The latter is pivoted at |38 to lever 43 and a tension spring'l31 interposedbetween lever 43 and the pressing nger holds thelatter yieldingly in rear position to cause seating of hook 28 against the rear of. slot |34.

finger |35 ywill move' forwardly relatively to the lever 43, holding the'hook 28 against the pin 4|. In this way the hooks are able to-accommodate the third position of the lever 43.

As will be apparent fromFigs. 2 and 4 the positioning lever |20 maintains its third position due to the fact that link 8| is down and roll |22 is away from cam |23. 'I'he link 82 can therefore rise and fall to render either of the lower pair of shuttles active without disturbing the position of the disabling or positioning levers.

The control circuit has two branches, one of which goes to the shuttle changing solenoid 52, and the other of which goes to the stopping solenoid |00. In order to determine which branch cf the circuits and therefore which of the solenoids 52 or |00 shall be energized I provide a controller positioned by lever 43.

When either of the shuttles SS' or SS2 is in action the parts will take the position shown in Fig. 7, where it will be seen that contact 54 is raised by cam |46 and contact |55 is down on plate |58. It will be seen thereforcthat the box motion shown in Fig. 2 not only selects which of two shuttles CS or CS2 shall be replaced by reserve shuttles, but also determines whether. wire |56 and |51 shall be connected to platek |58.

It is customary in those types of looms which are supplied with shuttle changing mechanisms to employ an electrical warp stop motion. As already stated a warp stop motion is ordinarily always capable of giving its indication and might therefore excite solenoid at the instant of contact between the detector and a full shuttle should a warp thread break at that time. There would result a misindication, which I prevent by interrupting the warp stop motion circuit periodically and during the interval that the weft detector is in contact with the weft supply being detected.

Referring to Fig. 10, I have shown the loom frame I as provided with a bracket |60 on the upper end of which is located a housing |6| supporting two insulated spaced contacts |62 and |63. These contacts may be of resilient material and are mounted as set forth particularly in Fig. 12 to be in vertical alignment with a con-y tact closer |64. The closer is vertically adjustable on a block |65 sliding between the blocks |86 of insulating material on which the contacts |62 and |63 are mounted. The block derives its vertical reciprocating motion from a lever |61 pivoted as at |68 to the bracket |60 and having a roll |69 .which contacts with a cam or eccentric on the bottom shaft 81.

It is to be understood that in the normal o-peration of the loom the active shuttle will be on the magazine side every other beat of the lay, and since the bottom shaft has a complete revolution every other beat of the lay, the cam or eccentric |10 will act to raise lever |61 once r`for every alternate non-detecting beat of the lay and will act to lower the block |65 on the intervening detecting beats of the lay. The low point of the cam or eccentric |10 is so set as to" eifect loweringl of block |65 during thedetecting interval when the feeler is in contact with the active shuttle and the latter is on the magazine side of the loom. At other times the contact closer |64 is raised to complete a circuit between wires |1| and |12 which are connected, respectively, to the contacts |62 and |63. VA pin and slot connectionl designated generally at |13 may be employed to eifect reciprocation of the block |65 as the lever |61 rises and falls. A

The bottom shaft 81 has secured thereto a cam which isipositioned for cooperation with a fork |16 formed integral with the arm 96. The latter may therefore be raised either by cam 91 for the normal warp stop operation of the loom, or by cam |15 at a different point in the cycle of loomI operations and responsive to the weft detector. Asseen in Fig. 10 the high points of these two cams are separated by a considerable angle and it is for this reason that the rod 92 can be acted upon to stop the loom by a warp fault with the lshuttle onthe magazine side of the loom or by a weftindication through cam |15 when the depleted shuttle SS or SS2 is on the shifting shuttle boxside of the loom.

The warp stop motion isj not shown structurally in the drawings but the essentiall parts thereof are indicated dagramrnatically in Fig. 9, where it will be seen that a contact electrode |85 is inclosed by but insulated from a second contact electrode |86. The latter is connected by wire |81 to the ground and both contacts extend through a slot in the upper part of a drop wire |88 which is Anormally held elevated by the warp W. Upon warp fault the drop Wire falls to e'ect electrical connection between the bars |85 and |86. For a further understanding of the strucvture and operation of the warp stop motion reference may be had to prior patent to Payne No. 1,852,024.

The operation of the several parts may be understood from the diagrammatic layout o1' the various circuits shown in Fig. 9. It will be understood that the pattern mechanism not shown controls the box motion so that one or another of the shuttle boxes may be opposite the race on the lay L. Assuming that either of the shuttles CS' or CS2 is active, the contact |54 will rest on contact plate |58 and current will flow through the following circuit when uncovered ferrule F of a bobbin B in the active shuttle is presented to the detector: ground, wire |82, the detector prong 61, ferrule F, prong 66, wire |59, plate |58,'contact |54, (contact |55 being raised), w'ire |56, shuttle changing solenoid 52, Wire |80, binding post |90 of the switch |I|, closure |89 of the switch, binding post |91 of the switch, wire |83, source of electric power P, and wire |84 to the ground. Current flowing in this circuit will energize the solenoid 52 to throw the latch 39 or `40 corresponding-to the indicating shuttle preparatory to an operation of the shut tle changing mechanism.` So long as either of shuttles CS' or CS2 is in action the contact |54 will be on plate |58 and if either of these shuttles should present a depleted bobbin to the detector the circuit just traced will be closed and an indication will be given through the selector mechanism shown in Figs. 13 and 14. The slide of the selector which is positioned by the rod 49 will be either in the dotted or full line position shown in Fig. 14 when the circuit alreadytraced is closed. 'I'he relative positionv of the several parts associated with lever 43 will be in the position shown in Fig. 6, where the showing in full lines `is for shuttle CS2 and in dotted lines for shuttle CS'.

When the pattern mechanism calls for a change so that one of the shuttles SS or SS. is to b^e active there will be a reversal ofthe con` tacts contained in the box |40 and upon presentationl of an exhausted shuttle to the detector the following circuit will be closed: ground, wire |82,

the weft detector, wire |59, plate |58, contact |55, (contact |54 now being up), wire |51, solenoid |00 of the knock-off device, wire |8I, switch I, wire |83, source of electric power P, and wire |84 back to the groundf Current flowing in this circuit does not energize the yshuttle changthe position shown in Fig. '7, and the carrier will be in the dot and dash position of Fig. 14, the structure being modified to permit the extra motion where the latches are out of possible engaging position with the dog 38.

It is to be understood that at the time the detector can close either of the two preceding circuits,`the circuit closure |64 willl be Vspaced from the contacts |62 and |63, and operation of the warp stop control will be temporarily prevented.

If a warp fault should occur at anytime when the contacts. |62 and |63 are connected, that is, at some time other than the detecting interval, the following circuit will be closed: ground, wire |81, bar |86, drop Wire |88, bar |65, wire |1I, conposition shownl in Fig. 9 so long as the loom is running but when the shipper handle moves to stopping position spring |01 acts to permit opening of switch so that whether the loom be stopped by the warp stop motion or the detector,

current will not flow through their respectivecircuits after the loom has come to rest.

From the foregoing it will be seen that I have provided a loom operating with a plurality of shuttles certain of which are replaced by a shuttle changing mechanism and others of which eect loom stoppage upon depletion and that a single detector cooperates with all the weaving shuttles. It will further be seen that provision is made for stopping the loom with an active depleted shuttle in the shifting shuttle boxes, thereby giving the weaver a visual indication as to the cause of loom stoppage. It will also be seen that I have provided a warp stop motion effective to stop the loom upon warp fault when the active shuttle is on the magazine side of the loom. In this connection it should be noted that three conditions exist in the loom, namely, a depleted weaving shuttle of one group will effect stopping of the loom upon arrival at the shifting shuttle boxes, a depleted shuttle of another group will be replaced at the magazine side while the loom continues to run, and the loom will come to rest with an active shuttle on the magazine side upon occurrence of a warp fault. Furthermore, it will be noted that the warp stop motion is so controlled that it cannot act through the knock-off device during the weft detecting interval, provision thereby being made to prevent the warp stop motion from effecting loom stoppage should eitherof shuttles SS or SS2 present a full supply of weft to the detector. Another feature of the invention is the provision of means actuated through a pattern mechanism controlled device, such as a box motion, to determine which of two circuits can be closed by the weft detector to effect either shuttle replacement or loom stoppage. The hooks which coact with the shuttle changing mechanism are modied with respect to their previous arrangement so as to permit movement of the control parts to a third or neutral position when either shuttle SS' or SS2 is active. The cams 91 and |15 are so disposed angularly with respect to the bottom shaft 81 that they give the knock-off device two working strokes for each two pick cycle of the loom, one cam to assist stoppage effected by the weft detector and the other acting in conjunction with the warp stop motion. Furthermore, the selector mechanism for the shuttle changer shown more particularly inFigs. 12 and 14 has provision for no additional motion beyond that heretofore employed to permit the latches to move out of possible operative relation with respect to the dog which causes rising of the shuttle changing boxes at the magazine end of the loom. In connection with the selector mecha- `nism it should be noted that either of shuttles CS' or CS2 can give an indication of weft exhaustion while on the magazine side of the loom and then become inactive for a period during which either of shuttles SS or SS2 is active without loss of the indication, the return of the indicating shuttle to action immediately eecting a' shuttle changing operation of the magazine without the necessity of a repeated indication.' When A the shuttles SS or SS2 become active the latches are moved o ut oi' register with the dog so that had either latch been set by one of the shuttles CS' or CS2 no premature indication of the magazine could result.

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 loom having a plurality of shifting shuttle boxes, a box motion to move any one of the boxes to active position, a multi-color shuttle changing mechanism, a cam movable by the box motion, a lselector for the shuttle changer controlled by the cam when certain of the shuttle boxes are active, and a second cam movable by the box motion to interrupt control between the first cam and the selector when certain other of the shuttle boxes are active.

2. In a loom having a plurality of shuttle boxes, a lever connected to said shuttle boxes, a pair of actuators for thelever, a cam moving with each actuator, a multicolor shuttle changing mechanism, a selector for the shuttle changing mechanism controlled by one of said cams and movable thereby to any one of a plurality of positions less than the number of shuttle boxes when certain of said shuttle boxes are active, and means `actuated by the other cam to move said selector out of control of the rst cam when certain other of the shuttle boxes are active.

3. In a loomhaving a plurality of sluiting shuttle boxes, a multi-color shuttle changing mechanism, a pair of actuators for the box lever, a cam moving with each actuator, each cam having a high and a low dwell, a selector for the shuttle changing mechanism controlled by one of said cams when the shuttle boxes controlled by the corresponding actuator are active, and means operated by the other cam to move the selector out of control of the first cam when other of the shuttle boxes are active.

4. In a loom having a plurality of shifting shuttle boxes, a box motion including a lever capable of moving any box to active position, a pair of independently movable actuators for the lever, movement of the lever by one of the actuators rendering certain of the shuttle boxes active and movement of the lever by the other actuator making certain other of the shuttle boxes active, a cam connected to each actuator and moving therewith, a multicolor shuttle changing mechanism, a selector for the shuttle changing mechanism controlled by one of the cams when the actuator corresponding thereto moves the lever to position certain of the shuttle boxes actively, and means moved by the other cam when the other actuator corersponding thereto moves the lever to render certain other of the shuttle bo'xes active, said means moving the selector out of control of the first cam.

5. In a loom having a plurality of shifting shuttle boxes, a box lever connected to the shuttle boxes capable of moving any shuttle box to active position, a pair of actuators movable independently of each other and each capable of causing motion of the lever, one of said actuators capable of moving the lever to two different positions, and the other actuator capable of moving the lever to two other positions, a cam connected to and moving with each actuator, a multicolor shuttle changing mechanism, a selector for the shuttle changing mechanism controlled by one of the cams, and means moved by the other cam to move said selector out of control of the first cam.

6. In a loom having a plurality of shifting shuttle boxes, a lever connected to the boxes and capable of moving any box to active position, a multicolor shuttle changing mechanism, two actuators for the lever, each actuator capable of giving the lever two diierent positions and the actuators together capable of giving the lever four different positions, a selector for the shuttle changing mechanism, means moving with one of said actuators to control and move the selec-- tor to either of two positions, and other means moving with the other actuator to move the selector out of control of the iirst means, the first means moving the selector when certain of the shuttle boxes arefactive and the second means moving the selector out of control of the first means when other of the shuttle boxes are active.

7. In a loom having a plurality of shifting shuttle boxes, a box shifting lever capable of moving any shuttle box to active position, a pair of actuators for the lever, each actuator capable of moving the lever to two positions, multi-color shuttle changing mechanism, a selector for the shuttle changing mechanism, and two cooperating levers one of which is connected to and capable of moving the selector mechanism, means moving with one of the actuators'to move one o1 the levers and cause motion of the selector, and means moving with the other actuator to cause the other lever to move said one lever out of control of the rst means when certain of the shuttle boxes are active.

8. In a loom having a plurality of shifting shuttle boxes, a box lever capable of moving any shuttle box to active position, a pair of actuators for the lever, a multicolor shuttle changing mechanism, a selector for the shuttle changing mechanism, cooperating levers one of which is connected to and capable of moving the selector, a cam.moving with each selector,`each cam having .a high and a low dwell, one of said cams to move said one of the levers While the other lever is on one of the dwells of the other cam when certain of the shuttle boxes are active, said other cam to move said other lever when the latter moves to the other dwell of said other cam to move the first lever out of control of the rst cam when certain other of the shuttle boxes are active.

9. In a loom operating with a plurality of shuttle boxes any one of which may become active, a multicolor shuttle changing mechanism to supply a plurality of types of reserve shuttles less in number than the number of shuttle boxes, a

shuttle box motion having two independently movable actuators to move any shuttle box to active position, selector mechanism for the shuttle changing mechanism movable to a plurality of control positions with respect to the shuttle changing mechanism, means to connect one of the actuators to the selector mechanism to move the latter to a plurality of positions, indicating elements carried by the selector mechanism to control the shuttle changing mechanism, one element for each position of said one actuator.

said elements movable from non-indicating to indicating position, connections from the second actuator to the selector mechanism to give said actuator additional motion to move the elements out of control of the shuttle changing mechanism when certain of the shuttle boxes are active, and means to return the selector to the control of the iirst actuator after control of said selector by the second actuator is relinquished.

10. In a loom operating with a plurality of shuttle boxes any one of which may become active, said boxes cooperating with a plurality of weaving shuttles, a weft detector to detect the condition of weft in any active Weaving shuttle, a shuttle changing mechanism to replace certain of said Weaving shuttles in the shuttle boxes, connections between the detector and the shuttle changer to cause the latter to replace any one of a given number of weaving shuttles less than the total number of weaving shuttles in said shuttle `boxes when indicating weft exhaustion through the detector, loom stopping mechanism, and connections between the detector and said stopping mechanism to render the latter eiective to stop the loom when the detector indicates exhaustion of weft in the other weaving shuttles which are not replaced by the shuttle changing mechanism.

11. In a loom having a plurality of shifting shuttle boxes cooperating with a plurality of distinctive weaving shuttles, multicolor shuttle changing mechanism to supply reserve shuttles corresponding to certain of the weaving shuttles only, loom stopping mechanism, a weft detector to detect the condition of weft in any active when the shuttles other than those replaceable b y the shuttle changing mechanism indicate exhaustion.

12. In a'shuttle changing loom having a plurality of shifting shuttle boxes any one of which may become active and operating with a plurality of distinctive weaving shuttles, a weft detector to determine the condition of and indicate exhaustion of weft in each weaving shuttle, a box motion to move any active shuttle box to active position, loom stopping mechanism, a multi-color shuttle changing mechanism to replace certain of theweaving shuttles, selector mechanism for the shuttle changing mechanism to determine the type of reserve shuttle to be supplied thereby, distributor means connected to the detector and operated by the shuttle box motion, a control from the distributor means to the stopping mechanism, and a second control from the distributor means to the selector, all indications of exhaustion given by the weft detector being communicated through the distributor means, the latter when in certain positions effecting loom stoppage by the first control means when certain of the weaving shuttle boxes are active, and the distributor means when moved to diierent positions by the shuttle boxes communicating RICHARD G. TURNER.