US1590621A - Warp-drawing machine - Google Patents

Description

June 29 @1926.

E. F. HATHAWAY WARP DRAWING MACHINE 1918 2 Sheets-Sheet 1 Q Original Filed March 23 @m aw m W W W% m 04 W a [it fl June 29 1926.

. 1,590,621 F. HATHAWAY WARP DRAWING MACHINE Original Filed March 23, 1918 2 Sheet-Sheet 2 Patented June 29, 1926.

UNITED? stares EDGAR F. IIATHAXV'AY, OF NELLESLEY,

MASSACHUSETTS, ASSIG'NOR TO GOLMAN'COMPANY, OFROCKFGRD, ELLINOZH, A GORFORATION OF ILLINOIS.

WARP DRAWING MACHINE.

Original application filed Mareh 23, 1918, SeriaLNo. 2%,431. Divided and this application filed May 2,

The object of the invention is to provide means whereby manual movement of thecarriage is prevented'except when the drawing-in needle is in its retracted position and 5 tree from engagement or interference with the warp, the harnesses or the reed;

In the accompanying drawings, Figure 1 is an elevation oi'a portionofthe travelling carriage which support'stlie operating mech l anism'of'thefwarpfdrawing machine." Fig.1

2 is an end' elevation, in partial sectiompt the carriage. v

Whilethe' novel: features otthi's nvention maybe; usefully embodied in other" forms and t yes of war -drawin9-- machines herein the same is illustrated as embodied" ina drawing-fin machine of the general type illustrated in Patent No. 980,086 to Field et al', Patent 'No. 871,680" to Field et al, and Patent No. 1,188,070 toiHa'thinvay and Lea.

In this type of machine, as will beseen from the patentsrefeiredto,the warp,

(not shown), theharnesses 2,'-the reed 3 5 andthe drop bar-s (ifanjr) are supported in a generally parallel arrangement,while 'a carriage, such as that which is I indicated in part at t,car rying the principal operating mechanism, is caused to travel along the beds of the machine, permitting the drawing-in needle 6 (Fig. 2) to act progr'essively' latter is-provided with means whereby it may be automatically and appropriately traversed along the'bed'of the machine to give the desiredprogressive-movement required for the-drawing-in operation. Preferably-- the carriage is arrangedso that it may alsobe manually moved along the bed, especially tor-the purpose-0f-returmng it to Serial No. 636,278.

its initial or starting position after any particular warp has been drawn in. Means are also employed herein whereby the carriage cannot be manually moved except when the needle 6 is in its retracted position and tree from engagement or interference with the warp, the harness or the reed.

l hile any suitable means for moving the carriage may be employed, herein thesame is fed along the bed of the machine by means of alead screw 10 driventhrough any suitable driving mechanism shown). such, for example, as that illus trated' in the prior-patent to Lea, No. 1,090; the lead screw engaging the two halves oi the split nut 12, (Fig 2), one half carried by the arm 13 and'the other by the arm 14;. both of which are pivotally mounted on the carriage plate 4. and,interengaged'by scg mentalgears 15 and 16, the arm lat being connected to the lever 17 which carries the handle 18 at a point convenient to be'moved by the operator. When the lever 17 in its downwardposition, the carriage is under 1 the control ofthe lead screw andcontinues to be traversed thereby. When the arm is elevated to the dottedrline position in cheated, the split nutis disengaged fromthe lead screw and the carriage may be moved along the bed independently of the screw. The lever 17 is locked in either its depressed or elevated position by means of the sprr.

pressedloclring pin 19 adapted to enter either of two abertures 20 in the upright bearing QOSt iixed on the carriage plate 4,the pin terminating in a manually engageable eye portion 22 adjacent the handle The lifting of the lever 17 also serves to throw the reed opener out of on, ment witht the reed 3 by means which e well known in this class of machines. Briefly, such means comprises the pivoted bearing yoke 20 inwhich is journalled one end oi the reed opener shaft 2?, the yoke begin connected to be rocked by the bellcrank lever 28' connected to the push rod 29 which is normally retracted by the contractile spring 30 to maintain the reed opener in engagement with the reed. hen the lever 17 is lifted, the push rod 29 is thrown forward to retract the reed opener by means oi a finger 31 carried on (not I nected by the link 37 to the rocker arm 38.

The latter is oscillated by means of the link 39 eccentrically connected to the crank disk 40, the latter being fixed on the driving shaft 41. The driving shaft 41 is driven by the gear 42 meshing with the gear 43, the latter on a countershaft 44, the gear 43 meshing with the pinion 45 non-rotatably fixed on the main drive shaft 46, but adapted to slide lengthwise the same as the carriage travels.

In order to facilitate the movement of the carriage back to its initial position to position it for beginning another drawingin operation, suitable means are provided, such, for example, as the sprocket chain (Fig. 1), the opposite ends of which are fixed to the machine so as to constitute in effect astationary rack. This chain is engaged by the sprocket wheel 52, the latter journalled on the carriage 4 and adapted to be turned up by suitable manual means whereby movement of the carriage in either direction may be effected with but little effort by the operator.

Hereinthe sprocket wheel is fixedly secured to the inner face of the gear 53 to rotate therewith, the gear being engaged by a pinion 54 (Fig. 1), the latter mounted on a stud 55 which also carries the hand crank 56. The latter has a clutch formation 57 whereby it may be slid lengthwise the stud to engage with the pinion 54 and turn the latter, thereby turning the gear 53 and the sprocket wheel 52 and causing the carriage to move along the bed so long as the split nut is disengaged from the lead screw.

In the ordinary operation of the machine, as soon as a warp has been drawn in, and the carriage has reached the end of its travel, theoperator will lift the lever 17 to disengage the split nut from the lead screw, and then, by engaging the hand crank 56 with the pinion 54, the latter may be turned l'eft-handedly to cause the carriage to more along the bed of the machine back to its initial position where it will be ready for the reloading of the machine and the repetition of the drawing-in operation.

In order to prevent the return movement of the carriage, except when the needle is retracted and out of engagement with the harnesses and the reed, means are provided whereby the carriage remains locked against return mot ement except when the needle is withdrawn from the work. Any suitable means may be provided for this purpose, but herein I have provided a locking; dog 60 which is pivoted at 61 and projects through an opening in the casing 62 sur- 7' rounding the gear 53 and pinion 54, the end of the dog being springpressed by the spring 63 into locking engagement with and between the teeth of the gear 50. The engaging or locking end of the locking dog (see Fig. 1) is beveled, so that, while. the movement of the gear 53 in the direction of the arrow shown in Fig. 2 and corresponding to the direction of traverse of the carriage during the drawing-in operation, is permitted, on the other hand the return movement of the carriage is prevented except when said locking dog is withdrawn from between the teeth of the gear.

To provide for the withdrawal of the locking dog from engagementwith the gear teeth only at such time as the needle is retracted, the locking dog is prolonged and at its oposite end lies within the path of a pin or cam member 64 projecting radially from the collar 65 on the shaft 41, the cam member being located at such a point that at each retraction of the needle it engages the end of the dog and depresses the same,

thereby lifting the opposite or locking end thereof free from engagement with the gear so long as the needle remains retracted.

It therefore follows that, during such times as the needle is within the reed or the harnesses, the locking dog serves to lock the gear 53 against right-handed movement (as viewed in Fig. 1), while permitting lefthanded movement thereof under the automatic feeding action of the lead screw, while, on the other hand, when the needle is retracted, the carriage is free to be moved in the opposite direction when. released from the lead screw.

Accordingly, when the carriage reaches the end of the traverse, and the drawing-in has been completed, the operator lifts the lever 17 to release the carriage from the lead screw and throw out the reed opener, and then uses the hand wheel carrying the handle 71 fixed on the driving shaft 41 to turn the needle-driving gear and retract the needle to its rearmost position. When in this position, the locking dog is with drawn by the cam member 64 and the operating carriage 4 is free to be traversed along the bed of the machine.

This application is a division of my application Serial No. 224,431, filed March 23, 1918.

I claim as my invention:

1. A warp-drawing machine having, in combination, a bed, a mechanism carriage on the bed, a chain constituting in effect a stationary rack, a sprocket wheel journalled on the carriage and meshing with said chain,

w EU lit) means for manually turning said sprocket Wheel, and means to lock the sprocket wheel against rotation in one direction.

2. A Warp-drawing machine having, in combination, a bed, a mechanism carriage on the bed, a chain constituting in eliect a stationary rack, a sprocket Wheel on the can riage and meshing with the chain, means for manually rotating the sprocket Wheel, and a dog for preventing rotation of the sprocket Wheel in a certain direction.

3. A Warp-drawing machine having, in combination, a mechanism carriage, a drawing-in needle on the carriage, means for reciprocating the needle, said means including a crank disk and a driving shaft to which said disk is fixed, means for manually moving the mechanism carriage, said means including a Wheel on the carriage,

a dog adapted to engage said Wheel, and a member on said shaft arranged to engage said dog to Withdraw the latter from said Wheel when the needle is in retracted position.

4. A Warp-drawing machine having, in combination, a drawing-in needle and operating mechanism therefor, a movable carriage on which the same is mounted, mechanism for causing said carriage to move lengthwise the machine during the drawingin operation, manually-operable mechanism for returning the carriage to its initial position, and means to lock said manually-operable mechanism except When the needle is out of the Work.

In testimony whereof I- have hereunto aflixed my signature.

EDGAR F. HATHAlVAY.

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