US1515102A - Device for introducing the woof by means of a gripping contrivance in looms - Google Patents

Description

NOV" 11, 1924, 15515,;02

J. GABLER DEVICE FOR INTRODUCING THE WOOF BY MEANS OF A GRIPPING' CONTRIVANGE IN LOOMS Filed July 5, 1922 2 Shasta-Sheet 1 J. GABLER Nov. 11, 1924 DEVICE FOR INTRODUCING THE WOOF BY MEANS OF A GRIPPING 2 Sheets-Sheet 2 CONTRIVANGE IN LOOMS Filed July 5,

Patented Nov. 11, 1924.

.JO'HANN canner or ETTLINGEN, GERMANY.

LOOMS.

Application filed July 5,

' dent of Ettlingen, Germany, have invented certain new and useful Improvements in a Device for Introducing the Woof by Means of a Gripping Contnvance in Looms, of which the following is a full, clear, and exact specification, reference being had therein to the accompanying drawing.

I This invention relates to improvements in weft inserting mechanism in looms for weaving of the type in which the weft is inserted half way through the shed by .meansof a weft rod or needle and taken the remainder of the distance by means of a hook device.

According to the present invention the weft is inserted double, as far as the centre of the shed by means of the weft rod, where it is taken hold of by the hook device, cutting mechanism being provided to sever the end connecting it to the last pick to allow this end to be drawn across the shed with the hook device, the hook device being provided with means whereby the weft is retained therein when this latter is at the outer end of its travel the remaining portion being carried back a predetermined dis tance by it on the succeeding pick forming a selvedge. Means are provided also whereby the weft. from the bobbin is held during the return stroke of the weft rod.

The invention will be described with reference to the drawings:

Fig. 1 is a plan of a machine constructed in accordance with the invention and showing the weft 2 inserted double to the centre of the shed; v

Figs. 2, 3,- and 4 are fragmentary plans showing the weft rod 1 and hook device 7,

8 in various relative positions;

Fig. 5 is a sectional elevation of a poi tion of the machine showing the mechanism for holding the weft during the return stroke of the Weft rod;

Fig. 6 is asectional elevation of a portion of the machine showing the mechanism for rocking the hook;

Fig. 7 is a sectional elevation of another portion of the mechanism which is utilized for severing the Weft;

Fig. 8 is a side elevation of the weft rod; Fig. 9. is a sectional plan of the same; i Fig. 10 is a side elevation of the hook de- 1922. Serial at. 572,817.

' vice which cooperates with the weft rod to lay the weft;

Fig. 11 is a sectional and Fig. 12 is a side elevation of one ofthe parts of the hook device:-

Fig. 13 shows the fabric when the introduction of the weft takes place. i

When the loom is working, the weft rod 1 and hook device 7, 8 are inserted into and withdrawn from the shed in any known manner.

The weft 2 passes from the bobbin on the carrier A over a guide 27 and round a guide pin 4 afiixed to the slay B, to the weft rod 1 and through the eye 5 and slot 6 therein to the edge 24 of the cloth 3 (Fig. 2) the weft at this period being still connected to that of the previous pick.

The loom is now in position to commence a fresh pick the weft rod 1 and hook device7, 8 travelling to the centre of the shed. During this travel, the weft being held at the edge 24 of the cloth 3, is pulled through the eye 5 of the weft rod 1 so that when the weft rod 1 reaches the centre of the shed the weft occupiesa position as shown in Figs. 1 and 3. The hook device 7, 8 complan of the same;

prising a tube 7 provided with a thread guide 18 and an inner tube 8 having a hooked end 17, enters the shed from the opposite side and when at the centre of the shed the hook 17 passes between the eye 5 and the slot 6 in the weft rod 1 whereby'the weft 2 is engaged round this hooked end 17.

The tube 8 is capable of a rocking motion inside the tube 7 but cannot slide therein. The tube '8 is rocked to open the eye 40 formed by the guide 18 on the tube 7 and the hooked end 17, by the cam 9 on the tappet shaft 41 through lever 10, link 11, lever 12, a rod 13, arms 14, 14' (Fig. 1) a rod 15- and an arm 16 when in position at the centre of the shed to receive the weft. On the insertion of the weft the tube 8 returns to its 100 cam 19 on the tappet shaft 41 through lever 105 21 and rod 22 is raised through the warp 23, at a short distance from the edge 24 of the cloth 3 to sever the weft 2, the position of this knife allowing for a selvedge to be formed." When the return stroke of the vIDEV'IGE FOR INTRODUCING THE W001 BY MEANS OF A GRIIPPING CONTRIVANCE IN weft rod 1 and hook device 7, 8 is commenced the severed end of the weft is drawn across the shed through the eye 40 in the hook device 7 8.

A1 cam 30 on the tappet shaft 41 is arranged to lift an arm 26 through the lever 29 and rod 28, during that portion of a revolution when the weft 2 is being drawn from the' bobbin on the carrier A, and to allow this arm 26 to fall onto the guide 27 on the slay B to grip the weft during the return stroke of the weft rod 1, thereby pre venting the weft from becoming tangled.

When the hook device 7, 8 has reached the end of its backward travel the end of the Weft 2 is still threaded through the eye 4:0

therein and is of sufficient len th to hepar- D ried back a) predetermined distance by the hook device on the next pick before becoming disengaged from the eye 40', thereby forming a selvedge on the side 25 offhe cloth 3. Both ends of the weft are therefore doubled 'over whereby a selvedge is formed at both sides.

Assuming the parts to be in the position illustrated in Fig. 1, as the weft rod 1 and hook device 7, 8 approach one another within the shed the tube 8 is rocked so as to move the hook 17 away from one side of the notch in the end of the tube 7 so as to open the eye 40. During the last por- 'tion of the relative approach of the weft rod and hook device, the hook device will pass the short stretch of weft which extends across the rod 1 between the eyes or guides 5 and 6 thereof. The weft thread then enters the notchin the end of the tube 7.

'At this time, the tube 8 is rocked about its longitudinal axis to carry the hook 17 in a direction to close the notch in the end of the tube and thereby close the eye 40; The weft rod and hook device then start their to disturb the short stretch of weft still Within the hook, it remains therein. The next operation is a movement of the hook device and weft rod simultaneously toward one another in the shed at which time the hookdevice carries the short en of the reviously laid stretch of weft into the sied, which short length pulls out of the eye 40 .as the movement continues, thus forming the turned over end for the selvedge edge. At the beginning of this movement, the

mechanism of ig. 5 is operated to release the weft thread which is then carried double by the weft rod 1 into the central-part of the shed where the weft is again engaged by the hook 17. During this-movement, the end of the previously laid weft thread is turned back into the shed as shown in F ig. land the knife 20 is so located that when severed, this turned over end will form a selvedge for the fabric. It will remain turned over until beaten up because there is nothing to displace it. It will be observed that since the end of the hook 17 is closed against the tube 7 so as to form a closed eye 40, there will be no danger of the hook engaging to injure any of the warp threads.

I claim: Q

1. In loom mechanism, a weft supply, a weft rod having at its forward end means for guiding thereacross the weft thread from the spool, a hook device, means for laid during the previous pick to form a' selvedge, the device during the reverse relative movement pulling the severed end of the weft'supply through the shed.

2. In loom mechanism, a weft supply, a weft rod having'at its forward end means for guiding thereacross the weft thread from the spool, a hook device, means for moving the rod and device toward one another within the shed from opposite edges of the warp and then in reverse directions out of the shed, means for causing an engagement of the device with the weft' on the weft rod as the device and rod reach the limit of relative approach within the shed, and means operative at approximately said limit for severing the Weft, at a point some distance within the shed, from the thread laid during the previous pick to form a selvedge, the device during the reverse relative movement pulling the severed end of the weft supply through the shed, and beyond the edge thereof and then into the shed during the next travel of the device into the shed to form a selvedge at the other edge.

8. In loom mechanism, a weft supply, a weft rod having at its forward end means for guiding thereacross the weft thread from the spool, a hook device, means for moving the rod and device toward one another within the shed from opposite edges of the warp and then in reverse directions out of the shed, means for causing an engagement of the device with the weft on the weft rod as the device and rod reach the limit of relative approach within the shed, means operative at approximately said limit for severing the weft, at a point some distance within the shed, from the thread laid durin the previous pick to form a selvedge, the evice during the reverse relative movement pullsaid free end will form a selvedge.

ing the severed end of the weft supply through the shed, and means operative during the movement of the weft rod out of the shed for holding the weft thread leading thereto. 1

4:. In loom mechanism, a weft supply, means for introducin the weft thread from said supply into the s ed double, to approximately the center of the shed, means for then severing the weft thread from the stretch laid during the recedin pick, at a point some distance wit in the s ed so as to form a selvedge, and means for drawing the severed end of the weft thread through the shed to lay the weft thread singly before the beating up operation.

5. In loom mechanism, a weft supply, means for introducin' the weft thread from said supply into the s ed double, to a proximately the center of the shed, means or then severing the weft thread from the stretch.

laid during the preceding pick, at a point some distance within the shed so as to form a selvedge, and means for drawing the severed end of the weft thread through the shed to lay the weft thread singly before the hea ing up operation, and then the free end into the shed during the next pick, whereby the 6. In loom mechanism, a weft supply, means for introducing the weft thread from saidsupply into the shed double, to approximately the center of the shed, means for then severing the weft thread from the stretch laid during the preceding ick, at a point some distance within the s ed so as to form a selvedge, means for drawin the severed end of the weft thread throug the shed to lay the weft thread singly before the beating up operation, andmeans for holding the weft thread coming from said supply while the-doubled part is being drawn completely throu h the shed.

7. In loom mec anism, a weft rod having guides for directing a weft thread across its ends, means for moving the rod to carry the weft thread on the end thereof approximately midway across the shed, a device movable into the shed from the opposite edge, and having a slot upon its advance end which may be closed or opened by a hook movable relatively thereto, means for cansin a movement of the hook to open the slot be ore it meets the end of the weft rod, whereby the stretch of weft thread advanoed by the rod may enter the slot, and then to closethe slot after the weft enters; whereb when the device is withdrawn from the she the thread will be drawn through the shed, and means operative after the thread enters said slot for severing the thread from the stretch laid during the previous pick.

8. In loom mechanism, a weft rod having guides for directing a weft thread across its end, means for moving the rod to carry its weft. thread on the end thereof approximately midway across the shed, a cooperating device comprising a member having an advance end movable past the thread on the rod when said device is moved approximately midway across the shed from the opposite edge, the advance end of said memher having a slot into which the thread on the rod enters when their limit,of a proach is reached, a hook ,rotatably carrie by the member for movement across the slot to open or close it, means formoving the said device into and out of the shed at each pick means to rotate the hook to allow the threa to enter the slot and to close the slot before the return movement begins, whereby the device will draw the thread through the shed, and means operative at approximatel the beginning of the withdrawal of said evice to sever'the thread from the stretch laid during the previous pick whereby the thread will be laid singl across the shed.

9. In loom mec anism, a weft rod having guides for directing a weft thread across its ends, means for moving the rod to carry its weft thread on the end thereof approximately midway across the shed, a cooperating device comprising a member having an advance end movable past thethread on the rod when said device is moved ap roxi-' mately midway across the shed from t e opposite edge, the advance end of said member aving a slot into which the thread on the rod enters when their limit of approach is reached, a hook rotatably carried by the member for movement across the slot to open or close it, means for moving the said device into and out of the shed at each pick, means to rotate the hook to allow the thread to enter the slot and to close the slot before the 'return movement begins, whereby the device will draw the thread through the shed, and means operative at approximately the beginning of the withdrawal of said device to sever the thread from the stretch laid during the previous pick! at a point within the shed whereby the turned in end fromthe previously laid stretch will form a selvedge.

In testimony whereof I have signed my namein the resence of two witnesses.

J )HANN GABLER. [n s.] Witnesses:

WALTER BRAUN, [L. s.] MAURICE W. ALTAmn. [1,. 5.]

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