US2054173A - Multicolor shuttle changing loom - Google Patents

Description

5 Sheets-Sheet -1 Filed ApriI S, 1955 snuent or Rnchard G.Tur'ne.r

Sept. 15, 1936.

Filed April 8, 1953 R. G. TURNER MULTICOLOR SHUTTLE CHANGING LOOM 5 Sheets-Sheet 2 (L11; 0 rum; 9.

Sept. 15, 1936. R. G. TURNER MULTI'COLOR SHUTTLE CHANGING LOOM 5 Sheets-Sheet 3 Filed April 8, 1935 Jrtue'ntor H k Richard G. T'urn:e.r

az x Sept. 15, 1936. R. G. 'VI'URNER 2,054,173

. IMULTICOLOR SHUTTLE CHANGING LOOM Filed April a, 1955 5 Sheets-Shet 4 FIE; II 0 Jrwentor Richard G-Iq rnev Sept. 15, 1936. NE 2,054,173

MULTICOLOR SHUTTLE CHANGING LOOM 8 msentor Rmhnrd G-Tur' ne' torneqs Patented Sept. 15, 1936 heir stares PATENT osrlcs MULTICOLOR SHUTTLE CHANGING LOOM setts Application April 8, 1933, Serial No. 665,140

19 Claims.

This invention relates to improvements in multicolor shuttle changing looms and it is the general object of the invention to simplify the weft detecting and color selecting mechanisms of such looms.

In co-pending application Serial No. 460,746 I have shown a loom wherein the weft detecting mechanism is located at the drop box side, together with pattern controlled means for selecting which of a multiple of circuits shall control the loom. In my present invention I employ a single detector on the magazine side of the loom so positioned as to coact with the active shuttle, together with means for storing the indication for a change should the active shuttle be moved to non-weaving position immediately upon arrival at the drop box side of the loom.

It is another object of my invention to mount the detector mechanism so that it can be moved to clear the path of the incoming shuttle from the magazine. As shown herein the detecting mechanism is mounted on the box top and is moved out of the path of the incoming shuttle when the top is raised to receive the fresh shuttle.

It is a further object of my invention to provide a mechanism having a plurality of sets of parts, one set for each weaving shuttle which can become active, to be controlled by the pattern mechanism and set to initiate a change by the detector mechanism. The setting is retained even though the pattern mechanism calls for a change in the active shuttle, and-when the depleted indicating shuttle returns to action the magazine will operate to advance a fresh shuttle without the necessity of a second indication.

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 electrical selector mechanism is shown,

Fig. 1 is a top plan view of the lay at the magazine end of the loom, the magazine being removed to show the weft detecting mechanism,

Fig. 2 is a vertical section on line 22 of Fig. 1, the magazine being added in section,

Figs. 3 and 4 are detail vertical sections on an enlarged scale on lines 33 and 44, respectively, of Fig. 1, a

Fig. 5 is a view similar in part to Fig, 4 but on a smaller scale and showing the shuttle and its relation to the detecting mechanism,

Fig. 6 is a perspective diagrammatic view showing the detecting and selecting mechanism together with the pattern control showing the preferred form of selecting mechanism,

Fig. 7 is a diagram showing the circuits when the preferred form is applied to a two-color loom,

Fig. 8 shows the preferred selector mechanism at the bottom of the loom on the magazine side,

Fig. 9 is a plan view looking in the direction of arrow 9, Fig. 8,

Figs. 10 and 11 are detailed vertical sections on lines Ill-l0 and l|--l I, respectively, of Fig. 9,

Fig. 12 is a front elevation of a portion of the mechanism shown in Fig. 8,

Fig. 13 is a side elevation of a portion of a loom having my electrical selector mechanism shown, and

Fig. 14 is a diagrammatic front elevation of a 20 with a magazine M on one end thereof having front and back walls 2| and 22 between which are compartments for front and back groups of reserve shuttles S and S respectively. The magazine has a bottom platform 23 for the rear compartment over which moves a plunger 24. The latter is actuated by a lever 25 pivoted to the loomside and operated against spring action by a downward pull on connector 26. The latter passes through a rocking guide head 2'! formed as part of lever 28 pivoting about fixed axis 29.

Delivery from the front stack is effected by rocking a holding lever 39 by means of a releasing lever 3| acting through link 32. Lever 3| is pivoted to the magazine at 33 and is moved in a clockwise direction by a link 34 also passing through the guide head 21. Each link has the lower end thereof formed with .a hook 35 to coact with a depressing stud 36 carried by a nor mally stationary lever 31 movable about fixed stud 38. When the operating stud 36 is moved down it will engage one or the other of the hooks, depending upon the position of the lever 28. position is determined by a flexible connector 39 extending to the opposite side of the loom and attached to a pattern lever 48 (Fig. 14) controlled by the pattern chain 4 i see Fig. 14.

Lever GE! is also connected by cord 42 to .a sliding mutilated pinion 43 forming part of the box motion and movable when the lever is raised into driving connection with the master gear 44 on the bottom shaft 45 of the loom.

This

By the connections described the lever 28 is rocked in timed relation with but before the shifting of the shuttle boxes B. The latter are mounted on the upper end of a lifter rod 46 which is and lowered by the box motion indicated in Fig. 14. By these connections the delivery of the reserve'shuttle from the magazine is coordinated with the active shuttle so that the shuttle delivered through the magazine throat will correspond to the depleted shuttle.

A rotating cam All (Fig. 13). regularly oscillates a lever 98 pivoted on axis 3 9, and the forward end of this lever has pivoted thereto a lifting latch 49 (Fig. 13) normally urged away from a lug 59 on lever 9? by spring 5i. During normal operation of the loom the latch rises and falls without engaging the lug, but when a change is to occur the latch is caused to engage the lug by mechanism to be described and rock lever 37 in a clockwise direction as viewed in Fig. 13. This will lift a rod 52 (Fig. 13) the upper end of which is'attached to a pair of shuttle boxes B and B These boxes are normally down so that the upper box B receives the active shuttle on alternate beats of the loom in normal operation. J

The upper'box has a cover 55, see Fig. l, pivoted thereto and held down yieldingly by a spring 56. A lifting lug 571 on the cover normally clears a cam 58 on the magazine as the lay moves back and forth in normal operation, but when the rod 52 lifts the boxes this stud will engage the cam during I the backward movement of the lay L and raise lweft detector which initiates a shuttle change and which can be used with theelectrical selecting mechanism to be described later.

As shown-particularly in Figso l to 5, I have 4 formed the cover with a frame-work 99having free vertical movement a'pin 6'2 of insulating material. A roll contact 99 on the pincontacts with vertical slots 9! in which is mounted for limited a brush 94 grounded to the loom by being attached directly to the cover. A second roll contact is -also mounted on the pin but is insulated bywasher 66 and collar El and has electric contact with the brush 68. The'latter, as shown in Fig. 4, is given an insulated mounting and is connected with 'wire 69. r r V r The active shuttle S, as well as all of the other shuttles may be made according to my prior Pat ent No.'1,99 3/l91, issued. March 5, 1935, and com prises a circuit. closing lever l9 pivoted to the shuttle spindle H and having a plate 72 which normally lies below the roll contacts 93 and'65,

being held in this position by a suflicient supply of weft to hold downa hump 79 on the lever. A

' lock spring 14 secured to the shuttle. body norcontacts will have contact with the plate.

mally bears laterally against the plate 12. weft is substantially exhausted a small spring 15 raises the plate 12 so that when the shuttle next] enters the box B" under the magazine both roll Spring 14 will snap under plate 72 to support the latter against pressure of the rollcontacts. Under these conditions, current will fiowin the following circult; the grounded connection of brush 64, said brush,.roll 93', plate '52, roll 95, brush-93, wire 69 (Figs. 6 and 7),,solenoid l9, wire ll, source of electric power 79, and the ground. Current flow-1 ing'in this circuit will energize thesolenoid and cause the same to attract its core i9 (Fig.9) It is to be noted that this .energization occurs when the active shuttle is on the magazine side of the hold 1'6.

When

the shuttle boxes.

tector indicates exhaustion of weft in the active loom and is effected by a weft detector located adjacent the magazine.

In the preferred electrical type of selector mechanism I provide a base plate 89 fixed with respect to the loom and mount on the right end thereof, as shown in Fig. 8, the previously identified. sole- Its core 19 is connected with a rod 8| which is slidable and oscillatable in a bearing 82 fixed to the plate. A swivel connection 93 permits partial rotation of the rod while the core is square in cross section. The left end of this rod 8| carries a selector head 84 from which extends an angle brace 85 carrying two spaced vertical pin's 86. A finger 81 formed as part of a latch control lever 88 pivoted at 89 on the stand causes rocking of said lever 83 in a counter-clockwise direction as viewed in Fig. 9 when the solenoid attracts its core. This lever lies behind the tail 99 of latch 49.

The head 85 has a wing 9| (Fig. 10) which may be connected to a cord 92 similar to the cord 39 shown in Fig. 14. As shown in Fig. 6 a portion of the connector 92 extends from the wing toward the bottom of lever 28 and may be. attached thereto in the same manner as is connector 39 shown in Fig.13. A spring 99 (Fig. 13) is interposed between the lever 28 and a fixed arm 94 secured to the stud 39. the connections between the lever 28 and the control at the opposite side of the loom.,

The block 80 (Figs. 8 to 12) has a pair of indication retaining or color control switches 95 and 96, respectively, which are'open when thrown to the left as shown in full lines in Fig. 8, but closed when thrown to the right as shown in full lines in Fig. 12. The head. 84 has 2. depending finger 91 horizontally alignable with but one switch at a time.

When the head 84 moves toward the solenoid, finger 91 will throw to closed position whichever of the switches 95 01 96 happens to be in its path, and this willbe determined by the box motion control at the opposite side of the loom.

A resetting lever 99 (Fig. 12) is pivoted to the.

stand 89 and has a swivelled arm 99 extending through a slot H30 in the head 84. The slot and the width of the arm 99 are so related that when the head is thrown in a right hand direction as viewed in Fig. 10 the resetting arm 99 aligns itself with switch 95 which is also in alignment with the finger 9?, arm 99 under these conditions not being able to engage the other switch 96. When This spring 93 tightens.

electric there is a shift of the shuttle boxes B,'a correwhich of the switches-95 01"96 is to be aligned with setting finger 91 and resetter 99.

The arm 99 is connected by lever 98 and link IOI to the lever 31 so that when the latter islifted the switch aligned with the resetting lever will be returned to open position.

In this electrical type of selector the pins 89 7 will not act to move the latch during the rocking of the head back and forth with each shift of When the electrical weft deshuttle, however, the rod 8| will move to the right as viewed in Fig. 8 to accomplish two results the first of which is to close whichever of the switches 95 or 96 is in the path of the finger 91, and the other of which is to throw the latch toward the normally inactive lever 3?. At this time, however, the latch is not rising on a working stroke, and is ineffective to lift the rod 52.

If the indicating shuttle remains in action, and assuming that it corresponds to switch 95, a second circuit will be closed as follows: (Fig. 7) ground, source of electric power 78, solenoid I6, wire I02, wire I93, contact points I94 on the pattern controlled switch W, wire I 05, switch 95,

which has retained its closed position following indication of weft exhaustion, wire I06, back to the ground. This completes a circuit through the solenoid which will keep the latch 49 in operative position under the lug on lever 31. Upon the next regular upward movement of the latch, therefore, the lever 37 will be rocked to accomplish the previously described results, to wit, elevation of box B from the normal down running position toward the magazine, and depression of the hook 35 corresponding to the active depleted shuttle so that the magazine may deliver a shuttle from the proper compartment.

There results also a lifting of the box cover which thus raises the detector mechanism out of the path of the shuttle which is to move from the throat of the magazine in the box B. The depleted shuttle at this time is received by the temporarily raised box B and although it is still empty and therefore capable of giving an indication, yet it enters a different box from that with which the detector is associated and for this reason the indication of exhaustion is not repeated.

The actual exchange of the selected shuttle from the magazine to the upper of the pair of changing boxes may be the same as set forth in my previously mentioned application, and in fact, so far as the shuttle change proper is concerned, the action following engagement of the latch with lever 37 may be the same as heretofore proposed by me, the downward movement of said boxes being accomplished by the cam 4'! in time to permit ejection of the depleted shuttle at the front of the loom, and picking of the new shuttle in box B when the lay next reaches picking position.

It is to be understood that if the other switch 9% had been closed and the switch W had been thrown in the position opposite to that shown in Fig. 7, a similar action would have taken place with respect to a reserve shuttle from the other compartment in the magazine.

If, after giving indication of weft exhaustion under the magazine, the depleted shuttle has been moved out of action immediately upon arrival at the drop box side of the loom, the switch W woufd have been shifted, and the previously traced circuit would not be closed, and in fact would be held open until a subsequent shift of the pattern mechanism restored the depleted shuttle to action with the attendant return of switch W to a position where it could close the circuit.

It is evident from the relation of the switches and 95 to their controls, that is, the finger 91 and the arm 39, that one shuttle could give an indication of weft exhaustion at the magazine side of the loom which would be retained for use even though shuttle indicated and was changed. In other words, when either shuttle gives an indication of weft exhaustion it will be exchanged for a fresh shuttle without necessity of a repeated indication regardless of how many picks it is held inactive at the shifting box side of the ioom, and regardless also of a change of the other shuttle.

in the interim the other My improved color selecting control mechanismhas. a control for each of the shifting shuttle boxes and for each compartment in the magazine, each control including a device to retain an indication. The indication retainers are aligned for operation by a selector that is coordinated with the shifting shuttle boxes.

From the foregoing it will also be seen that I have provided a multicolor weft replenishing loom wherein a single detecting mechanism on the magazine side of the loom is effective to initiate a change in shuttles by setting an indication retaining device which may be in the form of a switch, after which the time of shuttle change is determined by a selector coordinated with the shifting shuttle boxes.

Resetting is effected with respect only to the retaining device that actually causes a shuttle change. Furthermore, the pathof the incoming shuttle passing from the magazine throat to the box B is made clear by removing the detecting mechanism from such path, in the present instance by raising the box cover. A repetition of the indication of weft exhaustion is also prevented by requiring the depleted shuttle, when again being'picked tothe magazine side of the loom, to enter a box other than that with which the detecting mechanism cooperates. Also, the change of shuttles occurs an even number of picks after the indication is given, whether the depleted shuttle is returned for changing on the next pick, or after a period of inaction.

The movement of the selector in the preferred form of the invention. as illustrated in Fig. 6 is accomplished by means of a lever I3fi which is rocked by a cam I3! moving in timed relation with the pinion 43. The purpose of the cam is to move the cable 92 to set the selector 84 before the boxes B are completely shifted, thereby permitting an earlier start in the operation of the parts at the magazine end of the loom.

The detailed structure of the second type of selecting and indication retaining mechanism is made the subject matter of a separate application filed on even date herewith by Holmes and Cederlund Serial No. 3,734. The broader aspects of this type, as well as the first or electrical type, however, are covered by my present invention.

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 multicolor shuttle changing loom, a lay, a set'of shifting shuttle boxes at one side of the loom, a magazine having a plurality of groups of reserve shuttles at the opposite side of the loom, selector mechanism to determine which group is to deliver a reserve shuttle, means to coordinate the selector and shifting shuttle boxes, weft detecting mechanism to detect the condition of weft in an active shuttle at the magazine side of .the loom, the detecting mechanism operatively 'related to the selector to initiate change 'of shuttle upon occurrence of weft exhaustion in a shuttle at the magazine side of the loom, and means to move said detecting mechanism out of the path of the shuttle moving from the magazine toward active weaving position when the lay is moving toward forward position.

2. In a multicolor shuttle changing loom having a lay, shifting shuttle boxes at one end of the loom to render active any one of a plurality of weaving shuttles, a shuttle box on the lay at the other end of the loom, a magazine having a plurality of groups of distinctive reserve shuttles at said other end of the loom, delivery means cooperating with the magazine to deliver from the latter a reserve shuttle corresponding to the weaving shuttle rendered active by the shifting shuttle boxes, a weft detecting mechanism located between the magazine and the shuttle box on said other side of the loom, means operatively I connecting the detector mechanism and delivery means to cause the magazine to deliver a reserve shuttle corresponding to an exhaustedweaving active shuttle, and means to move the detecting mechanism out of normal position to render clear the path of the shuttle moving from the magazine to said other box when the lay is moving toward forward position.

3.,In a multicolor shuttle changing loom having a lay,'a set of shifting shuttle boxes on one tend of the lay to render active any one of a plurality of weaving shuttles, a magazine at the opposite side of the loom provided with a plurality of groups of reserve distinctive shuttles, a

shuttle-box on the lay under the magazine to receive an active weaving shuttle and also movable toward the magazine to receive a reserve shuttle therefrom, weft detecting mechanism on the magazine side of the loom normally in the path of a shuttle moving from the magazine toiward the box on the magazine side of the loom,

andmeans rendered effective by movement of the shuttle box toward the magazine to move the detecting mechanism out of said path.

4. In a multicolor shuttle changing loom having a lay, a set of shifting shuttle boxes on one end of the lay to render active any one of a plurality of weaving shuttles, a shuttle box on the opposite end of the lay, a magazine on that end of the loom opposite the shifting boxes having a o;,,-plurality of groups of distinctive reserve shuttles,

' means defining a delivery throat for the magazine through which a reserve shuttle drawn from any group passes when moving along a given path toward said shuttle box, a weft detecting mechanism to effect movement of a reserve shuttle corresponding to the depleted active shuttle along said'path, said detecting mechanism located on the magazine sideof the loom along said path,

and means dependent upon the weft detecting '50.;rnechanism to insure removal of the detecting mechanism from s'aidpath when the reserve shuttle is moving therealong when the lay is moving toward forward position.

5. In a multicolor shuttle changing loom having a lay,ia set of shifting shuttle boxes on one end of the loom to render active any one of a V plurality of weaving shuttles, a multicolor magachange of a shuttle from the 'magazine to said shuttle box to prevent the detecting mechanism from detecting the condition of weft in said shuttle box, thereby preventing the repetition of a previously given indication of weft exhaustion.

6-.In a multicolor shuttle changing loom having a lay, a set of shifting shuttle boxes on one end of the lay to render active any one of a plurality of weaving shuttles, a magazine at the opposite end of the loom having groups of distinctive reserve shuttles, there being a weaving shuttle for each group, a pair of boxes on the lay under the magazine movable from a normal weaving positon toward the magazine to effect a change of shuttle, the box of said pair nearer the magazine when in normal position receiving the active weaving shuttle, a weft detecting mechanism to cooperate with said first box of the pair to detect the condition of weft of any active Weaving shuttle on the magazine side of the lay,and means operative at the time of a shuttle change to move said'pair of boxes toward the magazine so that the box ofsaid pair remote from the magazine receives the active depleted shuttle, thereby preventing the detecting mechanism from detecting, the weft in the active depleted shuttle in the remote box. a

'7. In a multicolor shuttle changing loom having a lay, a set of shifting shuttle boxes on one end of the lay to render active any one of a plurality of weaving shuttles, a magazine at the op'-' posite end of the loom having groups of distinctive reserve shuttles, there being a weaving shuttle for each group, a pair of boxes normally sta-' tionary with respect to the lay on the magazine side of the lay, said pair of boxes movable toward the magazine toeffect a change of shuttles, a cover for the shuttle box nearer the magazine, weft detecting mechanism mounted 'on'the cover to coact with each weaving shuttle when'active and on the magazine side of the loom to determine the condition of weft therein and effective to initiate a change of shuttles from the group corresponding to a depleted active shuttle into said box nearer the magazine, and means operative at the time of movement of the pair of boxes toward the magazine to move said cover and detecting mechanism out of the path of the reserve shuttle moving toward said pair of boxes.

8. In a multicolor shuttle changing loom haviing a lay a set of shifting shuttle boxes on one end of the lay to render active any one of a plurality of weaving shuttles, a magazine at the opposite end of the loom having groups of distinctive re- 7 V serve shuttles, there being a weaving shuttle for each group, a pair of shuttle boxes on that end of the lay under the magazine, said boxes being normally down and the upper box of the pair' positioned to receive each'weaving shuttle when active, a single weft detecting mechanism on the magazine side of the loom'to indicate exhaustion of weft in an active shuttle, means controlled by the detector mechanism to raise the pair of boxes toward the magazine to receive from the latter a shuttle corresponding in kind to the depleted r active'shuttle, and means to' render the detecting mechanism ineffective to indicate weft exhaustion when the pair of boxes is in raised position.

9. In a multicolor shuttle changing loom'having a lay, a set of shifting shuttlle boxes on one end of the lay to render active any one of 'a pluposite, end of the loom having groups of distinctive reserve shuttles, there being a weaving shuttle for each group, a discharge device for each group of reserve shuttles, aco'ntrolmechanism for each discharge device, a selector mechanism operatively related )to the control -mechanism,

means to coordinate one of said mechanisms with a the shifting shuttle boxes to effect relative movement of the mechanisms so that'but one control rality of weaving shuttles, a magazine at the optmechanism will be in operative relation with respect to the selector mechanism ata time, a single weft detecting mechanism on the magazine side of the loom to co-act with each active weaving shuttle and operatively related to the selector mechanism to effect operative relation of the latter with the control mechanism corresponding to the depleted active shuttle, and means operative upon a subsequent pick of the loom to operatively relate the selector mechanism previously set by the weft detector with the corresponding discharge device.

10. In a multicolor shuttle changing loorn having a lay, a set of shifting shuttle boxes on one end of the lay to render active anyone of a plurality of weaving shuttles, a magazine at the opposite end of the loom having groups of distinctive reserve shuttles, there being a weaving shuttle for each group, a discharge device for each group of reserve shuttles, an electric weft detector on the magazine side of the loom to cooperate with each active shuttle as soon as the latter is boxed on the magazine side of the loom, an electromagnetic device to be actuated upon indication of weft exhaustion by the electric weft detector, and selecting mechanism 'having movements coordinated with those of the shifting shuttle boxes interposed between the electromagnetic device and the discharge devices to render that discharge device corresponding to the depleted active shuttle effective to discharge the shuttle therefrom.

11. In a multicolor shuttle changing loom having a lay, a group of reserve shuttles, a shuttle box on the lay movable relatively to the lay toward the group to effect a shuttle change, a weft detector extending into the path of movement of the box and effective to initiate a change of shuttles, and means to move the detector out of the path of the shuttle box as the latter moves toward the group.

12. In a shuttle changing loom, shifting shuttle boxes at one end of the loom to place any one of a plurality of weaving shuttles in active position, a magazine having a plurality of groups of reserve shuttles at the other end of the loom, means to cause the magazine to replace a depleted active weaving shuttle by a similar shuttle drawn from the magazine, and mechanism connected to the shifting shuttle boxes to delay the action of said means until a subsequent arrival of the depleted shuttle on the magazine side of the loom.

13. In a multi-color shuttle changing loom having a lay, a set of shifting shuttle boxes on one end of the lay to render active any one of a plurality of weaving shuttles, a magazine at the opposite side of the loom having groups of distinctive reserve shuttles, there being a weaving shuttle for each group, a discharge device for each group of reserve shuttles, a weft detector on the magazine side of the loom cooperating with any active weaving shuttle when on said magazine side, a primary electro-magnetic circuit, a branched secondary circuit, normally open switches in the branches of said secondary circuit corresponding to different weaving shuttles, means to complete said first circuit on indication of weft exhaustion, means energized by closure of said first circuit and to thereby cause closing of the switch in that branch of the secondary circuit corresponding to the indicated active shuttle, and pattern controlled means to complete said secondary circuit through said closed switch to effect shuttle transfer.

V 14. Ina multi-color shuttle changing loom having a lay, a set of shifting shuttle boxes on one end of the lay to render active any one of a plurality oiiweaving shuttles, a magazine at the opposite side of the loom having groups of. distinctive reserve shuttles, there being a weaving shuttle'for each group, a discharge device for eachgroup of reserve shuttles, a Weft detector on the magazine side of the loom cooperating with any active weaving shuttle when on said -magazine side, a primary electro-magnetic cir- -cuit,' a branched secondary circuit, normally having a'lay, a set of shifting shuttle boxes on one end of the lay to render active any one of a plurality of weaving shuttles, a magazine at the opposite side of the loom having groups of distinctive reserve shuttles, .there being a Weaving shuttle for each group,'a discharge device for each group of reserve shuttles, a weft detector on the magazine side of the loom cooperating with any active weaving shuttle when on said magazine side, a primary electro-magnetic circuit, a branched secondary circuit, normally open switches in the branches of said secondary circuit corresponding to diiTerent weaving shuttles, means to complete said first circuit on indication of weft exhaustion, means energized by closure of said first circuit and to thereby cause closing of the switch in that branch of the secondary circuit corresponding to the indicated active shuttle, pattern controlled means to complete said secondary circuit through said closed switch to effect shuttle transfer, and means to thereafter reset said closed switch in normal open position.

16. In a multi-color shuttle changingi loom having a lay, a set of shifting shuttle boxes on one end of the lay to render active any one of a plurality of weaving shuttles, pattern mechanism to determine which shuttle shall become active, a magazine at the opposite side of the loom having groups of distinctive reserve shuttles, there being a Weaving shuttle for each group, a discharge device for each group of reserve shuttles, a weft detector on the magazine side of the loom cooperating with any active weaving shuttle on said magazine side, means including an electro-magnetic circuit efiective to control shutthe transfers, detector-controlled means to close a switch in said circuit on indication of weft exhaustion in an active shuttle by said detector, and pattern controlled means to complete said circuit and to effect shuttle transfer when the indicated shuttle next returns to the magazine side of the loom after indication of weft exhaustion in said shuttle.

1'7. In a multi-color shuttle changing loom having a lay, a set of shifting shuttle boxes on one end of the lay to render active any one of a plurality of weaving shuttles, a magazine at the opposite side of the loom having groups of distinctive reserve shuttles, there being a weaving shuttle for each group, a discharge device for eachgroupxof reserve shuttles, a weft detector onthe'magazine side of the loom cooperating with any active weaving shuttle on said magazine side,

means including an electro-magnetic circuit controlling shuttle transfer, detector-controlled means'to close a switch in said circuit on indicationoi weft exhaustion in an active shuttle by said detector, pattern means controlling the shifting of the shuttle boxes at the non-replenishing side of the. loom, and means connected to and controlled .by said pattern means efiective to complete said circuit and to cause shuttle transfer When the indicated shuttle next returns to the magazine side of the loom after indication of weft exhaustion in said' shuttle.

18. In a multi-color shuttle changin loom having allay, a set of shifting shuttle boxes on one .end of the lay to render active any one of :a plurality of weaving shuttles, pattern mechanismto determine which shuttle shall become active, a magazineat the opposite side of the loom having groups of distinctive reserve shuttles,

' there being a weaving shuttle for each group, a

discharge device for each group of reserve shuttles, an electric weft detector movable with the lay and cooperating with any active weaving shuttle when on the magazine side; a branched electro-magnetic circuit having switches in parallel branch portions thereof, and means including an electro-magnetic circuit controlled by said detector and effective to cause the closing of a selected switchwhen a corresponding and substantiallyexhausted active shuttle is boxed at the magazine side, and pattern controlled means causing said circuit to be closed at another point t.

opposite side of the loom having groups of distinctive reserve shuttles, there being a weaving:

shuttle for each group, a discharge device for each group of reserve shuttles, a weft detector on the magazine side of the loom cooperating with any active weaving shuttle when on said magazine side, pattern means controlling thev shifting shuttle boxes at the non-replenishing side of the loom, and means including an electro- V 'magnetic-device controlled and rendered operative by said detector tostore an indication of substantial weft exhaustion in an active shuttle, and said pattern means causing said electro-magnetic device to effect shuttle transfer on the next return of the indicated shuttle to the magazine side after'indication of weft exhaustion in said shuttle.

RICHARD GREENLEAF TURNER.

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