US1742881A - Pile-fabric loom - Google Patents

Description

Jan. 7, 1930. E. w. STQNE FILE FABRIC LOOM Filed March 22, 1929 4 Sheets-Sheet l lNVE/VTOR MWJGLL ,Jl- I ATTORNEY Jan. 7, 1930. E. w. STONE FILE FABRIC LOOM Filed March 22, 1929 4 Sheets-Sheet 2 Jan. 7, 1930. E. w. STONE FILE FABRIC LOOM Filed March 22, 1929 4 Sheets-Sheet 3 [AH/ENTOR. 62W

A TTORNEY Jan. 7, 1930. E. w. STONE FILE FABRIC LOOM Filed March 22, 1929' 4 Sheets-Sheet 4 ATTORNEY tion, while the rope or cable is utilized for Patented Jan. 7, 1930 UNITED STATES PATENT OFFICE EDWIN W. STONE, OF LONGMEADOW, MASSACHUSETTS, ASSIGNOR T0 BIGELOW.HART FORD CARPET COMPANY, OF THOMPSONVILLE, CONNECTICUT, A CORPORATION. OF

MASSACHUSETTS FILE-FABRIC 1 1300M:

Application filed, March 22, 1923, Serial, No, $9,296,

This invention relates to pile fabric looms for the production of a pile surface, either cut or uncut, and is more particularly directed to pile wire controlling mechanism.

It is now the ordinary practice in looms of the above type to provide a carriage, or horse, as it is sometimes called, for the withdrawal of the front pile wire from the fabric or cloth and insert such pile Wire into the, open shed. The pile wire carriage is now usually given its pile wire withdrawing and inserting movements by means of a continuously moving chain and an intermittently moving and actuated rope or cable connected to the carriage. The withdrawal of the pile wires from the cloth requires considerably more power than the insertion of the withdrawn wire into the shed, and to meet this condition the continuously moving chain is utilized for the pile wire withdrawing mothe pile wire inserting motion.

During the withdrawal of a pile wire from the cloth the rope operating mechanism is idle and it is withdrawn outwardly with the carriage by a pull on the, rope or cable which tends to stretch it. This stretch is particularly observable Where the loom is of increased width incident to the demand that has arisen during recent years for wider and wider carpets and rugs and the like, and since the pile wire supporting switch occupies a front position during the withdrawal movement of a pile wire, and a rearward position for the insertion of that pile wire into. the shed, the

inner end portion of the switch and the wire carried by it is liable to strike the head or buttend portions of the wires in the cloth as the switch is moved from its front towards its rear position. This condition is incident to the stretch that is imparted to the rope or cable as the pile wire is withdrawn, so that the retractile force of the rope or cable acts upon the pile wire carriage to move it inward slightly as soon as the carriage has been tripped from the pile wire withdrawing chain, and the wider the loom and consequent length of the rope or. cable, the, more emphasized will this retractile force of the rope and inward movement ofthe carriage become as soon as the carriage is released from the chain.

An important feature of the presentinvention consists of means for. holding the. pile wire carriage in its outer withdrawn position against the retract-ile force of the rope, or

cable when the carriage is released or tripped from its connection with the withdrawing chain, and since the purpose of the carriage holding means is to prevent engagement of the inner end, of the withdrawn pilewire with the heads or butts of the wires in the cloth, as it and the switch are, moved to pile-wire inserting positiomsaid holding means is, placed under control, of switch movement, the, constructionv being such that the carriage is re,-v leased, from, the, holding means by movement of the switch to its, rearward or pile wire inserting position.

It isthe common practice-to providemeans for tripping the carriage or horse, from the chain whenfthe. former has reached its outer position, and such tripping instrumentalities work effectively. to this. end except under; occasional conditions when the carriage may fail to be released from the, chain. Should this occur, the carriage will continue to move outwardly with the chain, contact with the tripping devices, and in its, continued outward movement cause severe, breakage of parts. Another feature of the present inventiontherefore consists in mounting the trip,- ping devices so that upon unusual strain placed thereon, the tripping devices, them: selves will be detached from the support on which they are mounted, and they, along with,

the, pilewire carriage, will move'to, the outer,

end ,of the support, and, drop therefrom with,- out breakagej Theinvention and novel features thereof will best, be made clear from the following description and the accompanying drawings of one good form thereof- In the drawings:

Fig, l is afront general elevation of portions of a pile fabric loom and pile wire controlling mechanism, containing thepresent invention;

Fig. 2 is a general plan View showing; the switch. in pile wire inserting position;

Fig. 3 is a detached detail showing the position of the switch and catch when the former is moved to its pile wire inserting position;

Fig. 4 is a general perspective view at the outer end of the carriage support, showing the general relation of parts as the carriage is being moved to its outer position;

Fig. 5 is an enlarged section on the line' 5-5 of Fig. 1;

Fig. 6 is a sectional front elevation of the pile wire carriage tripping means and chain;

Fig. 7 is a plan view with parts broken away and showing a modified form of the switch controlled catch for the pile wire carriage ring a suitable guideway 5 for the pile wire carriage 6. Mounted in the lower part of the guideway 5 is the pile wire withdrawing chain 7 which passes about the sprocket wheel 8 at the outer end of the supporting frame and around a similar sprocket wheel 9 at the inner end of the supporting frame. The pile wire withdrawing chain 7 is continuously driven from the chain wheel 10 which as shown is formed as a sprocket wheel for engaging the lengths of the chain to impart continuous and positive movements to the chain to cause the run in the guideway to move outwardly, and secured to the chain 7 is a projection or lug 11, ofwhich there may be any suitable number, for engaging a part on the pile wire carriage as will presently appear. As usual, the chain 7 passes about suitable guide rolls 12 on the supporting frame.

As hereinbefore noted, the purpose of the chain 7 is to withdraw the front pile wire of the group from the cloth, andthe pile wire inserting means as shown comprises the rope or cable 13,0ne end of which is secured to the pile wire carriage 6, at 14, and from the pile wire carriage the rope extends inwardly and passes about a guide pulley, 5 at the inner end of the supporting frame. a then about the ripe wheel 16 which may be intermittently driven, as usual, from any suitable source of power, but as shown in the present instance of the invention 1t 1S driven from the motor 17 r and a train of gearing 18 to impart through the rope wheel the initial or inserting movement to the carriage and then the'r ope wheel is freed from its driving means, as usual, to permit the pile wire withdrawing chain to function and withdraw the pile wire from the cloth. The rope wheel as shown is of the scroll type whereby a suitable speed regulation of the carriage in the pile wire inserting cated more clearly in Fig. 4, and is llkQWiSQZ.

as usual, provided with a pile wire pusher to insert the pile wire in the shed, but since these details may be of any preferred construction their further description appears unnecessary.

The pile wire carriage shown on anenlarged scale by Fig. 6 comprises the guide members 20 which engage the guide grooves formed in the upper part of the supporting frame,as usual, and pivotally mounted upon the carriage.6 at 21 is the lever 22 having a hooked end portion 23 for engagement with a projection 11 on the pile wire withdrawing chain 7. It is essential that the connection between the pile wire withdrawing chain and the pile wire carriage shall not become detached during pile wire Withdrawingkmmement, and as a means to this end the pile wire carriage has pivotally connected thereto at 24 the locking lever 25, the lower end of which is adapted to engage a recess 26 in the hook member 22 when the latter is in its operative'connection with the chain. 27 normally imparts to the locking lever its locking movement and this maybe supplemented also by the leaf spring 28, the construction being such that when the car-v riage is at the inner end of its travel the hook member 22 may engage the projection 11 onthe pile wire withdrawing chain, whereupon the end of the locking lever will be moved by the described springs into its locking position to maintain the parts in engagement. V

' hen the pile Wire carriage has been moved to its outer position it isessential that the connection between the carriage and the chain be interrupted, and as a means to this end the present invention provides a bracket 29 at the outer end of the supporting fame 4, and adjustably secured to the bracket 29 which is normally in fixed position at the outer end of the supporting frame is a trip device for the locking lever 25, which consists in the presentinstance of a roller 30 mounted upon a stud 31 and adjustably secured in position in a slot 32 of the bracket 29, the construetion being suchthat as the carriage-moves to its outer position the locking lever 25 will be tripped from its locking position, thereby freeing the part- 22 fordisengagement from the chain. To insure such disengagement, the pivoted member 22 has an upwardly ex tending arm 33 adapted to strike a trip device 34 adj ustably mounted on the bracket 29, as indicated in Fig. 6. The construction is A spring.

such that as; the carriage; moves, to; its outer, pile wire withdrawing position, the locking lever; 25. is) first trapped, then the member 22. is positively, litttedv from engagementv with the cloth and is guided thereby during the inserting movement of the pile wireinto the shed.

As hereinbeforestated, the switch isinoved into two positions, one the pile wire with drawing position, and after the pile wire is,

withdrawn the switch is moved to its pile wire-inserting position, as shown more-clears ly by Fig 2. Suitable means are employed for imparting such movements towards and from the front of the-loom, and is'herein typi-. fied as a link 39 which may be appropriately driven, as usual, from some going part of the loom.

\Vhen the switch S6 is moved; from its front or pile wire. withdrawing position to itsirear or pile wire inserting position, the pile wire then in the guide or groove of the switch is swung rearwardl-y, asiindicatedbythe dotted lines a Fig. 2-, past the heads or butt end: portions of the pile wires then bound in thecloth, as indicated at b, so that it becomes essential.

during such movement of the. switch that the pile wire being swung to its rearward inserting position shall: not strike the headsor butts, of the pile wiresthen in the cloth.

As hereinbefore stated however, the pile: wires are withdrawn from the cloth by the chain 7, and likewise the rope l3 and. the scroll about which it passes are moved by thepull of the chain, so that the carriage travels to its outer position while placing stress-upon the rope or cable. Such stresscauses an ini? tial stretch of the cable or rope and when the carriage has reached its outer position and istripped from its connection with-the chain,

as hereinbefore described, the pile wire carriage is apt to be moved inwardly by the retractile force of the stretched rope orcable, ascondition which would cause the end of the pile wire then inthe switch tostrike the heads or butts of the pile: wires then bound the; cloth as the switchis moved from its front pile wire withdrawing-position to its rear or pile wire inserting-position. This condi-.

tion is augmented where the loom .is of extra width as now demanded by theatradefor the production of increased widths: of carpets,

The switch 36ihas: the pile wire rugs and the like, and one of the main purposes, of the presentinvention is to obviate this. defective. condition of operation by providing a catch to hold the pile wire carriage in. its outer. position, when released from connection with the chain and to continue such hold upon the carriage until by movement of the switch; towards pile wire inserting position the holdingmeans istripped.

line the construction represented by Figs. 3,4.- and 5., theswitch 36 has an outwardly extending portion 40 on. which is mounted a catch for engagement with a projection on the pile, wire carriage when. the latter has reached its full outward movement.

Mounted upon the carriage G is an abutmentor shoulder 41 adapted to be engaged by the latch 42 whenthe carriage is at ts outward limit ot movement, such catch being mounted as shown in Figs. 3, 4L and 5. upon the extendedportion l0= of the switch; The catch. may be variously contrived but as i1? lustrated in the present instance of the. in-

vention it comprises a latch carrying bracket L3 secured to theextension 40, of the switch, and pivotally mounted on the bracket 43 at 4A: is the catch 42, the lower end portion of whichi-s bevelled, as at 45, so that as; the abutment 41. on the: carriagepasses outwardly it willlittth'e: catch andrfinally the latter Will dropv in trout of the; abutment. 41.1, to thereby hold the. carriage in its outer limit of; mowement',

The catch 4:2: has a projecting portion 456; which extendslinto; the bracket 43', and con: nected to the portion 46 of the catch; islarod H; which extends upwardly through the upper member oi -the bracket 4&3 andis. under theinfluenceof a, spring; 418;. normally tending;

liQillOl-dl the catch in its carriagelocking posi;.-. tion. If desired, the tension offthe spring and, its efl'ect upon the catch may be; varied;

by the adjusting screw 49 threaded to: the upper end portion ofthe rod t7.

Then; the carriage is given its pile wire withdrawing movement by the chain the switch is; in its front position, that is, the inner; end; of the switch ismoved into position tolhavethe front pile wire of the groupin the cloth withdrawn in the guide groove 3-8eofi the switch,,and asthe pile wire carriage is moved outwardly by the chain in withdrawing the pile wire, the catch 42 is in posi-- tion to. engage the. shoulder or projection ll onv the carriage and thereby hold the carriage in its outer position when released from the chain, to. prevent the retract1le force of the rope or cable from moving the carriage inwardly.

Then/the switch. is moved or swung from itspi'le wirewithdrawing position to its rearward or pile wire inserting position, as indicated inEig, 2, the catch 42 which has'been,

described as mounted upon the. member 40 ot the switch, will: be swung into full line:

position, Fig. 3, to thereby carry its holding port-ion from the line of movement of the shoulder or abutment 41 on the carriage, so

that when the switch is moved toits pile wire inserting positionthe catch is tripped, to thereby free the carriage to its pile wlre 1nserting movement.

From the construction described as one embodiment of the present invention it will. be notedthat the catch is controlled in its releasing movement of the carriage by the movement of theswitch to its rearward or pile wire inserting position, a condition which insures proper movement of the end of the pile Wire about to be inserted in the shed past the butts or heads of the pile wires then bound in the cloth.

In the modified construction illustrated in Figs. 7, 8 and 9, the catch for holding the pile wire carriage in its outer position when re-' leased from the chain, is pivotally mounted upon its support at 50 and the catch 51 hasrounding a pin 55 passed through the idle end 56 of the catch, and adjustment of the spring T tension may be effected by the nuts 57 ,as

indicated in Fig. 8.

Extending downwardly from thecatch 51 is the finger 58 which rests upon the horizontal arm 59 of a bell crank lever pivoted at 60 to the supporting frame 4 or at one side thereof, as indicated in Fig. 7. The downwardly extending end .61 of the bell crank is connected at 62 to a rod 63 which is under control of the switch. 7

As indicated in Fig; 7, the switch 36 is pivotally supported at 37 upon the bracket 35 as previously described, and extended laterally and secured to the outer end of the switch is an arm 64 to which is secured the inner end of the rod or link 63, the construction being such that when the carriage'reaches its outer position on the pile wire withdrawing movement, the arm 64 will move the link or rod 63 in a direction to rotate the bell crank pivotedat 60 so that the catch may engage the projection v53 on the carriage. hen, however, the switch is moved rearwardly into its pile wire inserting position, the arm 64 acting as a crank will move the rod 63 in the reverse direction, thereby turning the bell crank so that it acts through the finger 58 to release or trip the catch from its holding relation with the carriage.

It appears, therefore, that in both the preferred and modified forms of the invention.

ing the carriage from the chain when'the.

former reaches its outward position that the carriage remains in engagement with the chain, a condition which abviously means breakage of parts by the continued outward movement of the carriage beyond its normal limit. T o obviate this objectionable operation and breakageof parts, the bracket 29 is secured to the supporting frame 4 by giveway connections which may permit the bracket 29 to 'be released from its holding means so that the bracketand the pile wire carriage may move with the chain beyond the pile wire carriage limit without breaking any of the parts which when they reach the full outer position of the chain run may drop from the supporting frame.

' As one good means to this end the bracket 29 is secured to the supporting frame by shearable pins 65 which are normally of suf-' ficient stability to effect release of the chain and pile wire carriage without rupture, but when the carriage remains in operativeengagement with the chain and is consequently moved beyond its outer limit, such shearable pins will break before any injury is done to other parts of the mechanism, thereby permitting the bracket 29 and the carriage and their operating devices to be returned into operative position merely by the employment or addition of new shearable pins.

The construction described as :one good practical form of the present invention may obviously be varied in structural. details, the essentials in this respectbeing that the can riage may be held inits outer position by the catch in opposition to the retractile force of the cable or rope and be released only upon and, in response to movement of the switch to pile wire insert-ing position, and while the shearable pins or bolts 65 furnish a simple and effective means for the prevention of breakage when the carriage fails to be released from the chain, it will be apparent that other equivalent means may be employed.

What is claimed is: 1. In a pile fabric loom, the combination of a pile wire carriage supported for movements to withdraw and insert pile wires,.a pile wire supporting switch movable-to one position for withdrawal of a pile wire from the cloth and to another position for insertion of a pile wire in the shed, mechanisms for moving the pile wire carriage to withdraw and insert pile wires, means-for holding the pile wire carriage in its, outer retracted position when released from the wire withdrawing mechanism, and means actuated by movement of the switch towards pile wire inserting position to release the carriage to its pile wire inserting movement.

2. Ina pile fabric. loom, the combination of a pile wire carriage supported for movements to withdraw and insert pile wires, a pile wire supporting switch movable to one position for withdrawal of a pile wire from the cloth and to another position for insertion of a pile wire in the shed, mechanisms for moving the pile wire carriage to with: draw and insert pile wires, a catch for holding the pile wire carriage in its outer retracted position when released from the withdrawing mechanism, and connections between the catch and switch actuated by movement of the switch towards pile wire inserting position for releasing the pile wire carriage to its wire inserting movement. 3. In a loom employing pile wires, in combination, a pile wire carriage supported for reciprocatory movement to insert and withdraw pile wires, a pile wire supporting switch adapted to occupy one position during the insertion of a wire and a different position during the withdrawal of a wire, means for moving the carriage in the wire withdrawing direction, a rope for moving the carriage in the wire inserting direction, means for holding the carriage in its withdrawn position against the tension of the rope, and means controlled by movement of the switch to wire inserting position for releasing the carriage from the holding means that a wire may be inserted in the shed.

4. In a pile fabric loom, the combination of a pile wire carriage mounted for movements to insert and withdraw pile wires, a chain for imparting pile wire withdrawing movement to the carriage, a rope connected to the pile wire carriage for imparting pile wire inserting movement thereto, a pile wire switch movable to and from position for inserting a pile wire in the shed, a catch for holding the pile wire carriage in its outer position against the retractile force of the rope when the carriage is released from the chain, and means controlled by the switch for freeing the carriage from the catch by movement of the switch towards pile wire inserting position.

5. In a pile fabric loom, the combination of a pile wire carriage, a pile wire supporting switch movable to one position for withdrawal of a pile wire from the cloth and to another position for the insertion of a pile wire in the shed, mechanisms for moving the pile wire carriage to withdraw and insert pile wires, a catch adapted to engage and hold the pile wire carriage in its outer position when released from the withdrawing mechanism, and means actuated by movement of the switch towards its wire inserting position for releasing the carriage to its wire inserting movement.

6. In a pile fabric loom, the combination of a pile wire carriage, a chain for moving the carriage to withdraw pile wires from the cloth, a rope or cable for moving the carriage to insert pile wires in the shed, a pile wire supporting switch pivotally mounted for movement towards and from pile wire inserting position, a catch for holding the pile wire carriage in its outer position against the retractile force of the rope or cable when the carriage is released from the chain, and connections between the switch and catch actuated by pivotal movement of the switch towards its wire inserting position for tripping the catch and freeing the carriage to its pile wire inserting movement.

7. In a loom employing pile wires, in combination, a pile wire carriage supported for reciprocatory movement to insert and withdraw pile wires, a pile wire supporting switch pivotally mounted and adapted to occupy one position during the insertion of a wire and a different position during the withdrawal of a wire, mechanism for reciprocating the carriage, and a latch carried by the switch and adapted to be shifted by pivotal movement of the switch into and out of position to hold the carriage retracted.

In testimony whereof, I have signed my name to this specification.

. EDWIN W. STONE,

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