US729645A - Take-up mechanism for looms. - Google Patents

Description

No. 729,645. PATBNTED JUNE 2, 1903.

.LNORTHROP.

TAKE-UP MECHANISM FOR LOOMS.

APPLICATION-FILED JAN. 16' 1903.

NO MODEL.

2 SEBBTQ-SBBET 1.

" No; 729,645. 1 PATENTBD JUNE 2, 1903* JLNORTHROP.

TAKE-UP MECHANISM FOR LOOMS. APPLICATION mum m. 16. 1903. N0 nonnp. M a z sums-sum 2.

Nirnn STATES Patented June 2, 1903.

PATENT OFFI E.

' JONAS NORTHROP, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO DRAPER COMPANY, OF HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

TAKE UP MECHANISM FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 729,645, dated June 2, 1903.

Application filed January 16, 1903. Serial No. 139,346. (No model.)

To all whom it may concern.-

Be it known that 1, Jonas Nonrnnor, asub- ,ject of the King of Great Britain, and a resident of I-Iopedale, county of Worcester, State.

of Massachusetts, have inventedan Improvement in Take-Up Mechanism for Looms, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings IO representing like parts.

This invention has for its object the production of means to prevent take-up in a loom in such a manner that the formation of eithera thick or a thin place will be prevented when the normal operation of the loom has been interrupted and the loom has stopped.

A modern loom may stop for various reasons and a perfect take-up mechanism must possess a certain elasticity or adaptability to ac- 2o commodate itself to different conditions. If, for instance, a loom stops for a warp failure and the weaver in turning the 100111 over by hand to place the lay in betterposition for drawing in the warp should throw the shuttle 2 5 across the lay, the take-up should act, because a thread of filling is laid. On the contrary, if the loom has stopped because of a filling failure-1I. 6., breakageor exhaustion of the filling, as would be the case with a common loom or because of repeated failure to thread the shuttle in an automatic filling-replenishing loom-the slight movement of the lay which the weaver might make preparatory to starting up should not cause the take-up to oper- 3 5 ate, even though the shuttle may be thrown across, because no filling would be laid. The movement of the lay by the weaver when the loom has stopped depends upon the conditions at the time of stoppage and the position assumed by the lay when the loom comes to rest. If the layis forward, the weaver pushes it back before starting, as it is doubtful whether a loom will attain sufficient momentum to pick the shuttle properly from the forward position of the lay. Then a warp-thread breaks,

the weaver may pull the lay forward in order to flatten the shed, so that the drawing-in may be accomplished more easily. After the thread is drawn in the lay is moved to its rearmost position in order to start up. If it is difficult to see where the broken warp-thread lies, the weaver may turn the loom-over by hand several times to watch and note which detector is operating. Since it is evident that, in the first place, a take-upmechanism should not act upon any. slight movement of the lay to place it in proper position for picking and, in the second place, that take-up should act providing the shuttle is picked, it will be inanifest that means are necessary to prevent or arrest the operation of the take-up if the loom is stopped by or through a filling fault and that the time of taking up shouldbc closely related to or in a manner regulated to accord with the time of picking.

In my present invention I have provided means for arresting take-up upon the occurrence of a fault in the filling, so that there will be no take up of the cloth when the shuttle fails to lay filling. Means are also provided .whereby if the shuttle is picked after stoppage due to a warp fault the take-up will be actuated if the loom is turned over by hand forward, as then the shuttle properly lays filling. If, however, the loom is turned back sufficiently to make one pick or more when stopped because of a warp fault, I have provided-means to retard the operation of the take-up for one pick, when the loom is again started. This prevents a double actuation of the take-up for only one pick of filling, and consequent formation of a thiii place in the cloth. By providing for the operation of the take-up whenever the shuttle is picked and lays filling the formation of thick places is prevented.

The various novel features of my invention will be described in the subjoined specification and particularly pointed out in the following claims.

Figure l is a left-hand side elevation, partly broken out, of a portion of a loom with one practical embodiment of my present invention applied thereto, the greater part of the picking mechanism at the nearer side of the loom being shown. Fig. 2 is a top or plan view, centrally broken out and on a smaller scale,

of the means for detecting filling failure on each pick. Fig. 3 is an inner side elevation of the take-up pawl and pawl-carrier in inoploo erative condition, due to the occurrence of a filling fault. Fig. 4 is a front elevation of the pawl-carrier guide. Fig. 5 is a perspective view of the detaining device to cooperate with the pawl-carrier when the 100111 is turned backward; and Fig. 6 is'a view similar to Fig. 3, but to illustrate the manner in which the detaining device cooperates at times with the pawl-carrier when the loom is turned backward, the detaining device being shown as just about to move into operative position.

Referring to Fig. 1, the take-up ratchet a take-up roll T, the train of transmitting-gearing between it and the ratchet, the shipper S, forming a part of a well-known loom-stopping instrumentality, and its notched holding-plate N are of well-known construction to those skilled in the art and operate in usual man ner. The cam-shaft O is provided with two picking-cams P one of which is shown in dotted lines, each cam cooperating, as usual, with a bowl or roll 13 mounted on the picking-shaft I, supported in bearings 30 on the 100m side, one of these shafts beinglocated at each side of the loom and having a picking-arm P to cooperate with the adjacent picker-staff P. It will be understood that the picking-cams are set oppositely and operate the corresponding pickers alternately, the picker-staff P and the picking-arm P being broken off in Fig. 1 for the sake of clearness. The arrow 2 in Fig. 1 indicates the normal or forward rotation of the cam-shaft and picking-cams. A double tappet-cam T is secured to the shaft 0, having oppositelyset tappets 25 and these are provided, in ac cordance with my present invention, to effect the operation of the take-up mechanism, so that take-up is effected under normal conditions on each pick, the tappets operating alternately and just after the picking of the shuttle is accomplished, as herein shown. A bracket or, having a rearwardly-projecling foot (1 is secured to the loom side near the front of the loom, the foot supporting a lateral headed stud a, which serves as a combined guide and fulcrum for the take-up pawl-carrier, to be described. The pawl-carrier is herein shown as an elongated rod a having rigidly secured to or forming a part of it the actuating-pawl (t and provided with a longitudinal slot a large enough to freely re ceive the stud a, the latter preferably being surrounded by a loose sleeve a to reduce friction. (See Figs. 3 and 6.)

By reference to Fig. 1 it will be seen that the stud is located near the point of engagement between the ratchet and pawl, the latter extending beneath the ratchet and effecting take-up on its active or forward stroke. A retracting-spring s is secured at one end to the pawl and at its other end (rear end) to a hook at on the foot a, the spring serving to draw the pawl back after its active positive stroke has been made. The pawl-carrier is flattened near its rear end at a to pass through an upright guide-slot 06 111 a bracket a secured to the loom side in front of the tappet cam T, the construction of the bracket being clearly shown in Figs. 3, 4, and 6. The bracket at one side of the slot is up wardly extended, as at (L32, and bent rear-' wardly, as at (4 for a purpose to be described, the pawl-carrier being guided in its longitudinal reciprocations by the upright sides of the guide-slot (L31 and by the stud 00, the normal inclination of the pawl-carrier being shown in Fig. 1. At its inner end the pawlcarrier is provided with an enlargement or head a? (clearly shown in Figs. 3 and 6) in front of and adapted to be engaged alternately by the tappets I? as the cam-shaft V rotates in the direction of the arrow 2, Fig. 1. When the head is engaged by a tappet, the pawl-carrier is moved forward against the stress of the spring 3 and the cooperation of the pawl and ratchet will effect actuation of the take-up. As the tappet wipes over the head a and passes below it the spring 5 retracts the pawl-carrier into the position shown in Fig. l in readiness for the next active stroke, and the retractive movement of the pawl-carrier is limited by the stud a engaging the outer end of the slot a. The part (1 of the bracket a is provided with a pin a on which is fulcrumed a detaining device, shown separately in Fig. 5, and consisting of an arm 1%, having its upper end bent or offset, as at m, and provided with a lateral hub or boss m to rest against the face of the part a of the bracket. The lower end of the arm is provided with a rearwardly-extended shoulder m and below the shoulder the rear end of the arm is shaped to present a cam-face m The weight of the arm is so disposed relative to its fulcrum a that the arm has a tendency to swing toward the back of the loom, and when the loom is normally operating the lower cam-like portion of the arm rests against the front of the enlarged head (L7, as shown in Fig. 1. As the pawl-carrier slides back and forth the detaining device will be rocked thereby on its fulcrum a 7 If, however, the loom is turned over backward by the weaver far enough to make a pick, the flat face of the tappet will engage the lower edge of the head a and will lift it, as shown in Fig. 6, so that the detaining device can swing back against the tappet, and as the latter in the continued backward movement of the loom passes from underneath the head a the shoulder m will be swung beneath it, so that the pawl (L2 will be disengaged from the ratchet.

It should be stated that when the retrograde movement of the tappet lifts the head a as described, the pawl-carrier is tilted or rocked about the stud a. Now when the loom is again started the leading tappet will not strike the head of, but it will pass beneath it and strike the cam-face m of the detaining device and will swing the latter toward the front of the loom, withdrawing the shoulder m from beneath the head and permitting the latter to drop onto the tappet, and as the latter continues its movement the pawl-carrier will rock or tilt on the stud (e as a fulcrum until it resumes its normal position, so that the next tappet will engage the head and eifect an active stroke of the pawl-carrier. Thereby take-up will be effected.

Unless the loom is turned back far enough to cause the lifting or tilting of the pawlcarrier as described the detaining device will not move into the detaining position, but any backward movement of the loom sufficient to effect one pick ormore will operate in the manner described, so that when the loom is again started up the first pick will act to release the pawl-carrier and on the next and second pick take-up will be actuated.

If the loom hasstopped because of breakage or exhaustion of the filling, as in a common loom, or because of repeated failure to thread the shuttle in an automatic filling-replenishing loom, the take-up should not be actuated if the lay is moved by the weaver preparatory to startingup. So, too, in certain types of loom provided with two fillingdetectors take-upshould be arrested upon detection of filling failure by either or both detectors.

Referring to Figs. 1 and 2, a controlling rock-shaft d has a rearwardly-extended arm (Z fast upon it, the said arm having a lateral pin (1 to enter a longitudinal slot d in the upper end of a link (1 the lower end of the link being pivotally connected at (1* with thepawlcarrier back of the stud a. If now the rockshaft CV is turned in the direction of the arrow 3, Fig. 1, the arm (Z will be raised and through the link d the pawl-carrier will be rocked or tilted into the position shown in Fig. 3, disengaging the 'pawl and ratchet. Such rocking of the shaft is herein effected by or through the detecting action of either one of two filling-detectors, shown in Fig. 2 as located on opposite sides of the 100m and arranged to detecton alternate picks, every pick thus being a detecting-pick. One of the detectors may be arranged to efiect the operation of a filling-replenishing instrumentality through melting of the rock-shaft d in wellknown manner, and such-rocking of the latter will act to raise the arm (1 far enough to arrest take-up, as described. The other filling-detector is arranged to rock the shaft (Z only far enough to arrest take-up through the lifting of the arm d, but not to operate the replenishing instrumentality, and the construction may be substantially as in United States Patent No. 711,737, dated October 21, 1902.

As shown in Fig 2, the fillingdetector f r and its slide f having an outward movement imparted thereto by cooperation of the wefthammer W upon detection of filling failure,

are substantially as in said patent, such movement' of the slide acting through anupturned arm f fast on the rock-shaft (V, to turn the latter far enough to effect a replenishment of filling and arrest take-up. The other fillingdetector g is mounted 011 a slide 9 and upon detection of filling failure by said detector the slide is moved outward by or through the Weft-hammer W Such movement of the slide acts upon an upturned arm 9 fast on the rock-shaft d but having lost motion thereon to a limited extent, so that the rock-shaft is turned only sufficiently to arrest take-up for that pick, such lost motion being provided by the shoulder g 011 the hub g of the arm 9 cooperating with a shoulder g on a collar g secured to the rock-shaft (Z all substantially as in Patent No. 711,737.

A detent-pawl (L25 is shown in Fig. l in continuous cooperation with the ratchet a so that there is no let-back, no matter which detector detects filling failure.

It will be manifest that rocking of the shaft d by or through either detector will thus operate to render the takeup-actuating pawl inoperative for the corresponding pick.

In Fig. 2 a knock-offlever n is so arranged that its inner end will be engaged by a dog f on the slide f upon outward movement of the latter a predetermined number of successive times, to thereby release the shipper and stop the loom, substantially as in United States Patent No. 529,943. This operation usually is eifected when in an automatic 100111 the shuttle fails to thread, and of course when the loom is stopped because of such a fault the take-up mechanism should not operate if the turning over of the loom by hand picks the shuttle. Manifestly the take-up will not be operated under such circumstances in any present invention, because one or the other of the detectors will detectthe absence of filling when the shuttle .is so picked and will render the pawl inoperative for that pick, as has been described.

In the embodiment of my invention herein.

shown provision is thus made for controlling or effecting the operation of a loom-stopping or filling-replenishinginstrumentality, and

the take-up is arrested contemporaneously ICC effective cooperation with the shoulder m under the circumstances hereinbefore described. g

I have herein shown one practicalembodiment of my invention without attempting to showor describe the various changes or modifications thereof which may be made by those skilled in the art without departing from the spiritand scope of my invention, and the latter, accordingly, is not restricted to the precise construction and arrangement herein shown and described.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In aloom, picking mechanism, take-up mechanism actuated directly after the action of the picking mechanism to start the shuttle and means to arrest take-up automatically by or through failure of filling.

2. In a loom, picking mechanism, take-up mechanism actuated in predetermined relation with the former, and means operative upon retrograde movement of the loom sufficient to effect one pick or more to retard takeup for one pick when the loom is started.

' 3. In aloom,take-up mechanism,and means operative upon retrograde movement of the loom sufficient to effect one pick or more to retard take-up for one pick when the loom is thereafter moved forward.

4. In a loom,take-up mechanism, and means operative upon retrograde movement of the loom sufficient to effect one pick or more to prevent take-up on the first pick when the loom is started.

v 5. In a loom, picking mechanism, take-up mechanism including an actuator operated intermittingly in predetermined relation with the picking mechanismmreans operative upon filling failure to render said actuator inoperative and thereby arrest take-up, and separate means operative upon retrograde movement of the loom sufficient to effect one pick or more to retard the operation of the actuator for one pick when the loom is started.

6. In a loom, picking mechanism, take-up mechanism including an actuator operated normally each time the shuttle is picked, and means operative by or through a change in the condition of the filling to prevent actuation of the take-up by mechanical or manual operation of the loom.

7. In a loom, take-up mechanism, including a ratchet and an actuating-pawl to cooperate therewith, picking mechanism, means to act upon the pawl to operate the latter each time the shuttle is picked, and means operative by manual retrograde movement of the loom to retard the subsequent operation of the pawl to a predetermined extent when the loom is started.

8. In a loom, take-up mechanism, including a ratchet and an actuating-pawl to cooperate therewith, a reciprocating pawl-carrier, picking mechanism, a cam to effect the active stroke of the pawl-carrier for each pick of the shuttle, and means operative upon failure of the filling to tilt the pawl-carrier and disengage the pawl and ratchet.

9. In a loom, take-up mechanism, including a ratchet and an actuating-pawl to cooperate therewith, alon git udinally-movable, tiltable pawl-carrier, a retracting-spring therefor, picking mechanism, including pick-cams,

means operating in predetermined relation therewith to effect an active stroke of the pawl-carrier for each pick, a filling-detector, and means operative upon detection of filling failure by said detector to tilt the pawl-carrier and disengage the pawl and ratchet.

10. In a loom, take-up mechanism, including a ratchet, its cooperating actuating-pawl, a longitudinally-movable, spring-retracted pawl-carrier therefor, and a combined guide and fulcrum for the pawl-carrier, combined with picking mechanism, means operating contemporaneously therewith to effect the active stroke of the pawl-carrier each time the shuttle is picked, and means operative upon filling failure to tilt the pawl-carrier upon the guide-fulcrum and prevent cooperation of the pawl and ratchet.

11. In a loom, take-up mechanism, includ ing a ratchet, its cooperating actuating-pawl, a longitudinally-movable, spring-retracted pawl-carrier therefor, picking-cams, tappetcams rotatable therewith to engage and effect the active stroke of the pawl-carrier on each pick, and a detaining device to disengage the pawl-carrier when the loom is turned back sufficiently to effect one pick or more, the said device being rendered inoperative by a tappet-cam on the first pick after the loom is started, to prevent take-up on such picks.

12. In a loom, take-up mechanism, including a ratchet and its cooperating actuatingpawl, and a pawl-carrier, picking-cams, tappet-cams rotatable therewith to effect the operation of the pawl-carrier oneach pick, and a normally inoperative detaining device for the pawl-carrier, retrograde movement of the loom sufficient to effect one pick or more acting through a tappetcam to effect cooperation of the said device with the pawl-carrier, whereby when the loom is started the first pick will effect the release of the pawl-carrier without take-up.

13. In a loom, take-up mechanism, including a ratchet, its cooperating actuating-pawl, and a detent-pawl, picking mechanism, means operated in predetermined relation therewith to operate the actuating-pawl on each pick, a device to control or effect the operation of a loom-stopping or a filling-replenishing instrumentality, connections between said device and the pawl to render the same inoperative by retrograde movement of the loom sufficient to effect one pick or more to retard to a predetermined extent the operation of the take-up when the loom isstarted.

14:. In a loom, take-up mechanism, including a ratchet and its actuating-pawl, picking mechanism, including pick-cams, cams rotatable therewith to operate the actuating-pawl and advance the take-up on each pick, means operative upon filling failure to prevent cooperation of the pawl and ratchet, and separate means to govern the pawl and retard take-up after the loom has been turned back more than a predetermined amount.

mechanism actuated upon each pick, two fillname to this specification in the presence of 1 15. Inaloom, picking mechanism, take-up In testimony whereof I have signed my 1 ing-detectors, and means governed by or two subscribing Witnesses.

through detection of filling failure by either JONAS NORTHROP. detector to arrest take-up automatically upon WVitnesses:

each pick on which such filling failure is de- E. D. BANOROFT,

tected. O. H. DRAPER.

Images