US1663941A - Cutting and clamping mechanism for picks and pick looms - Google Patents

Description

March 27, 1928. 1,563,941

A. A. GORDON CUTTING-AND CLAMPINGMECHANISMFOR PICKS AND rlclgLoous Filed Aug. 6. 1926 3 Sheets-Sheet 3 45 47 46 INVN'fOF. 4 ALBERT/\GQRDON AT-r o R NE-Y March 27, 1928. 1,663,941

7 A. A. GORDON CUTTING AND CLAMPING MECHANISM FOR PICKS AND lICK LOOKS vFiled Aug. 6. 1926 3 Sheets-Sheet 3 v v Q P @J 44 .4 1 40 y INVE NTOR A EF -I- A Cfo F2120 N ATTO R NEyS Patented Mar. 27, 1928.

PATENT orrics.

ALBERT A. sermon, on 'WORGESTER,;MASSACHUSETTS, iissrenon 'rol CBOMBTON &.

KNOWLES 'LOOM WORKS," OF WORCESTER, MASSACHUSETTS, A; CORPORATION OF P MASSACHUSETTS.

CU TI AND-CLAMPING MEoHAN sMFon rIoKsAnD; PICK Looms.

Application filed August 6, 1926;. Serial No'. 127,697;

This invention relates to mechanism for cutting and clamping the Weft thread after a fresh weft carrier has been inserted in a pick and pickloom.

In such loo-ms, a plurality ofshuttle boxes are provided at the magazine endof the l oom a'nd'any shuttle may be. moved out of action on any pick of the loom. In such a loom, it frequently; happens'that a shuttle is thus move'd'out of running positionimmediately. after the tr'ansfer'of a freshcarrier thereto and before the weft isthreaded in the shuttle eye. V v

It is necessary that the weftber'held" in suitable alignment-witlrthe shuttle and shut tie-eye until the shuttle-again goes into ac tion and is picked to' the" opposite side of thewloom. p r I It. is the general'objectofmy invention to provide improved means for cutting the thread between the. shuttle and the 'end holder of themagazine and for-clamping and holdingthe severed thread in position for threading into the shuttle eye.

A further. object is to provide a-device efiective to present" the thread 'in position for cutting and damping, said'device in the preferred form acting also to open the cutting and clamping member so that the thread may be receivedftherein. p

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out'in'theapp ended claims. A preferred form of; the invention is shown in the drawings in which s Fig. 1 is a left hand side elevation of certain parts of a pick and pick loom embodying my invention; h

Fig. 2 is a plan View of the parts shown in Fig. 1; v

Fig. 3 is a similar view but showing certain partsin a different position; v

Fig. 4: is a sectional side-elevation taken substantially-along the line 4 -4 in Fig. 3 but with certain parts in'a difierent position' 5 is a plan viewof parts ofa shuttle box, looking in the. direction oi the arrow 5 in Fig. 4

Fig. 6' is a detail sectionalview, taken along the-line 6"-6 in Fig. 5; Y s

Fig".- 7 is an enlarged left hand side elevation' of'a shuttle box, looking in the direction o-f-the arrow 7 in Fig; 3, and

Fig. 8 is a'diagrammatic View showing; zhe relation of certain parts of theinvenion. 7 a

Referring to the drawings I have shown a portion of a loom frame lO-ha-ving a magae zine 11 mounted thereon;- A lay 12 is"mount-.

ed. for oscillating movementin the usual manner and supportsa pluralityof rotary shuttle boxes 13 at the magazine end thereof. These boxes are mounted upon-a'sleeveJM rotatable on a shaft 15-formingan1 extens sion ofthe lay, said sleeve being." provided with a gear 16' at one end thereof adapted tob'e engaged by one or theother of the racks 17 (Fig. 1)"secured't0=the upper end of a box shifting rod -l8 which is moved vertically by suitable operating. mechanism not shown. a h

The-racks are positioned laterally by rolls 20 (Fig;- 1-) on across bar 21- slidable in a casing 22 and movable laterallyby a; pin 23 secured to the upper end of an-actuating member24 and positi'oned' in a slot .25. in a cross bar 21. The member 24 is also moved vertically by pattern controlled actuating mechanism not: shown.

The'difi'erent weft carriers are supported in vertical compartments of r the magazine, from which they are singly released in the usual manner upon indication of weft exhaustion. The-weft carrier. thus released drops 'intoabobbi'nholder 27 byiwhich it is moved rearward; under the transferer 28 'which isvertically slidablein a framez29carried bythe lay 12 and which is actuated by a transfer lever 30.

The parts thus far described are substantially similar to those shown anddescribed in my prior application, Serial-No. 92,037, filed March 3, 1926, an'd these partsin themse'lvesform no separate part of my. present inserted weft carrier in position for cutting and clamping between the shuttle eye and the end holder.

Thread cutting and clamping mechanism.

Each rotary shuttle box is provided with an aligned thread cutting and thread clamping device (Figs. 4 to 6) which includes a cutting blade 36 (Fig. 6) and a clamping lug or projection 37. The blade 36 cooperates with' a second blade 38 fixed on the frame of the box 13 and the clamping projection 37 fits into a recess 39 in which'the end of the thread is clamped after being cut by the blades 36 and 38. The cutting and clamping member35 is pivoted at 40 at the upper rear corner of the box and a coil spring 41 tends toyieldingly close the cutter, giving the cutting and clamping action. Means for opening the cutter and receiving the thread will be hereinafter described.v

It will be noted that each separate shuttle box is provided with an individual thread cutting and clamping device which is at all times movable with the box and operative to i hold the thread in any position of the box. Thread holder and thread positioning dem'ce.

,The thread holder is mounted in fixed relation to'the loom frame 10 and magazine 11 and comprises a clamp or holding device 45 and a casing 46 having a series of verweights 48 tical openings 47 therein, in which hooked are slidably mounted. In threading up the magazine, each weft end is led from a slot at the end of the magazine rearwardly around a projecting arm 50 (Figs. 1 and 3) andis then passed under one of the hooks on the weights 48 and around the clamping device 45. r r

The thread positioning arm is pivoted at 56 on the casing 46 and is provided with an arm 57 to which a spring 58 is connected for swinging the arm yieldingly to the position indicated in Fig. 2. The arm 55 is provided with an upwardly inclined end portion 60 and with upper and lower thread guiding projections 61 and 62 .(Fig. 4). An actuating rod '65 projects laterally from the bobbin holder 27 and is provided with a hook shaped engaging portion 66 at its outerend.

As the holder 27 is moved rearward with a weft carrier W, the thread positioning member 55 is engaged by the actuating rod and by its hook shaped end 66, and is swung about its pivot on the casing 46 from the position shown .in Fig. 2 to the position shown in Fig. 3. The weft thread T is thus carried rearward toapproximately the position shown in Fig. 3, during which time the active shuttle box 13 is being moved forward to transfer position.

As the lay approaches its forward limit of movement, the upwardly inclined end 60 of the thread positioning arm engages a diaing the weft thread under said member. As

the lay completes its forward movement, the portion 60 of the positioning arm 55 passes rearward beyond the projection 68, thus permitting the cutting and. clamping member to close, severing the thread, and clamping the severed thread as indicated in Fig. 6.

As the lay thereafter moves rearward the inclined portion 60 of the thread positioningmember- 65 passes above the projection 68, allowing the clamp to remain closed and hold the weft thread as'long' as maybe desired and until the shuttle is picked from the box, causing the thread to enter the shuttle eye. As the shuttle holder 27 returns to its forward position, the spring 58 swings the arm 55 to the normal position shown in Fig. 2, in which position it is ready to operate in the next succeeding transfer.

One of thepurposes of the weights 48 is to yield upwardly as arm' 55 places the thread to prevent breakage ofthe' latter. In Fig. 8 there is shown'diagrammatically the relation of the stack of bobbins in the magazine, the bobbin holder 27 and the yielding weights 48. When the bobbins U are in the magazine, the ends T extend downwardly toward the arm 50 andthence to one of the weights. All of the ends T of any one stack passunder the hooked part of the corresponding weight and when the. lowest" bobbin passes downwardly onto the holder 27 the weight will receivea slightdownward motion to take up the slack in the threads T. The relation of the weights and bobbin holder is such that the end T of the bobbin in magazine has been filled that there will be sufiicient yielding of the weight to compensate for the swinging of arm 55 because of] the fact that the. end T of the" bobbin in the holder is nearer. horizontal than it was when occupying thelowestposit-ion in the stack of bobbins: above the holder-'27.

Havingthus described my invention and theadvantagesthereof, I do not wish to be limited to the details herein disclosed otherwise than as set forth in the claims, but what I claim is 1. In a loom',-a Weft carrier magazine,'a weft end-holder, ala'y, a plurality of shuttle boxes mounted thereon at the magazine end of the loom, means: to move said shuttle boxes to and from active position, means to transfer a weft carrier to the active. shuttle box, a thread cutting and clamping device mounted on each shuttle box, and means to actuate the cutting and clamping device associated with the active shuttle box only.

2. In aloom, a weft carrier magazine, a weft end holder, a lay, a plurality of shuttle boxes mounted thereon at the magazine end of the loom, means to move said shuttle boxes to and from active posit-ion, means to transfer a weft carrier to the active shuttle box, a threadcutting and clamping device mounted on each shuttlebox and engaging the weft between the shuttle eye and the weft end holder, and means to actuate each cutting and clamping device only when its shuttle box is in running position.

3. In a. loom, a weft carrier magazine, a weft end holder, a lay, a. plurality of shuttle boxes mounted thereon at the magazine end of the loom, means to move said shuttle boxes to and from active position, means to transfer a weft carrier to the active shuttle box, a thread cutting and clamping device mounted on each shuttle. box, and a single actuating means for all of said thread cutting and clamping devices, said actuating means being operative only with respect to the cutting and clamping device associated with the actively positioned shuttle box.

4. In a loom, a weft carrier magazine, a weft end holder, a lay, a plurality of shuttle boxes mounted thereon at the magazine end of the loom, means to move said, shuttle boxes to and from active position, means to transfer a weft carrier to the active shuttle box, a thread cutting and clamping device mounted on each shuttle box, and means topresent thereto the weft thread to be severed as the lay approaches front center.

5. In a loom, a weft carrier magazine, a weft end holder, a. lay, a plurality of shuttle boxes mounted thereon at the magazine end of the loom, means to move said shuttle boxes to and from active position, means to transfer a weft carrier to the active shuttle box, a thread cutting and clamping device mounted on each shuttle box, and means mounted at the front of the loom and movable rearward to present the weft thread of the transferred weft carrier in position to be clamped and severed as the lay approaches front center.

6. In a loom, a weft carrier magazine,a weft end holder, a lay, a plurality of shuttle boxes mounted thereon at the magazine end of the loom, means to move said shuttle boxes to and from active position, means to transfer a weft carrier to the active shuttle box, a thread cutting and clamping device thread positioning member also guides the thread up or down to a position to be severed and clamped by the thread cutting and clamping device positioned on the active shuttle box.

8. The combination in a pick and pick loom as set forth in claim 6, in which said thread positioning vmember when in rearward position is effective to open the thread cutting and clamping device on the active shuttle box as the lay moves forward.

9. The combination in a. pick and pick 7 loom as set forth in claim 6, in which said thread positioning member when in rearward position is effective to open the thread cutting and clamping device on the active f shuttle box as the lay moves forward, but

permits the device to remain closed! and grip the thread during rearward movement of the lay.

10. In a loom, a weft carrier magazine, a

Weft end holder, a lay, a plurality of shuttle boxes mounted thereon at the magazine end of the loom, means to move said shuttle boxes to and from active position, means to transfer a weft carrier to the active shuttle box, a thread cutting and clampingdevice mounted on each shuttle box, a swinging arm mounted on a fixed pivot at the front of the loom, and means to swing said arm rearward as the thread carrier is presented in position, said arm positioning said Weft thread as it moves rearward and being operative when in rearward position to engage and open said thread cutting and clamping device.

11. In a loom, a weft carrier magazine, a weft end holder, a lay, a plurality of'shuttle boxes mounted thereon at the magazine end of the loom, means to move said shuttle boxes to and from active position, means to transfer a weft carrier to the active shuttle box, a thread cutting and clamping device mounted on each shuttle box, a swinging arm mounted on a fixed pivot on the front of the loom, a bobbin holder movable rearwardly to present said weft carrier in transfer position, and an actuating member projecting laterally from said bobbin holder and engaging said arm to swing said arm rearwardly as thebobbin holder moves rearward, said arm when thus-swung rearward engag ing and positioning the weft thread, and engaging and open ng the thread cutting and clamping device when in rearward position.

12. In a Weft replenishing loom, a weft carrier magazine, a lay, shifting shuttle boxes on the end of the lay adjacent the magazine, thread cutting. mechanism, a thread holding device to' hold the endsof the threads extending from the Weft carriers in the magazine, means to receive a weft carrier from the magazine and move the same to transfer position, a thread placing member operable by said receiving means to present the thread of the Wefticarrier thereon'to the 10 cutting mechanism, and a yieldable slack taking-up element to vary the length of the thread from the holding device to said weft carrier.

In testimony whereof I have hereunto af-' 15 fixed my signature.

ALBERT A. GORDON.

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