US754290A - Warp stop-motion for looms. - Google Patents

Description

No. 754,290. PATENTED MABH S, 1904. 0. H. DRAPER.

WARP STOP MOTION FOR LOOMS.

APPLICATION FILED DBO. 24, 1903.

H0 MODEL. 2 SHEETS-SHEET 2.

UNITED ST TES Patented March 8, 1904.

P TENT OFFICE.

CLARE H. DRAPER', or 'HOPEDALE, MASSACHUSETTS, ASSIGNOR To DRAPER COMPANY, OF HOPEDALE, MASSACHUSETTS, A CORPORA- TION OF MAINE.

SPECIFICATION forming part of Letters Patent No. 754,290, dated March 8, 1904.

Application filed December 24, 1903. Serial No. 186,451. (No model.) i K To all whom it may concern: 4

Be it known that I, CLARE H. DRAPER, a citizen of the United States, and a resident of Hopedale, county of Worcester, Stateof Massachusetts, have invented an Improvement in WVarp Stop-Motions for Looms, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates more particularly to warp stop motion mechanism for looms wherein the detectors are normally supported or retained in inoperative position by the warp-threads, failure or undue slackness of a warp-thread releasing its detector and permitting it to move into position to cooperate with a feeler and through suitable means effect the operation of a stopping instrumentality.

ln my present invention I have provided novel means for operating the feeler to effect the feeling and non-feeling strokes thereof, and I have also provided, means to prevent subjection of a released detector to any material strain when engaged by the feeler.

The various novel features of my invention will be fully described in the subjoined specification, and particularly pointed out in the 1501- lowing claims.

Figure 1 is a transverse sectional 'View of a ortion of a loom having one embodiment of my invention applied thereto. Fig. 2 is an enlarged view, in rear elevation and looking toward the front of the loom, of the mechanism for effecting the movement of the feeler, together with the devices which serve to actuate a stopping instrumentality upon the arrest of the feeler by a detector released by failure or undue slackness of its warp-thread. Fig.

3 is a sectional detail on the line 3 3, Fig. 2,-

looking toward the left. Fig. 4 is a side view of ,the rockerand hunter to be hereinafter referred to, and Fig. 5 is a perspectiveview of the rocker shown in'Fig. 4:. i

in the present embodiment of my invention 1 have shown the warp-stop-inotion mechanism as belonging to that type wherein the stop-motioncontr0lling detectors also serve as heddles, and in Fig. -1 two series or banks of.

stop to support the adjacent edge of-a released detector.

Two parallel rockshafts L are suitably mounted in bearings below the plate or sepa rator 3, and said rock-shafts are provided with rocker-arms 5, which have attached feelers 6.

The rock-shafts t have attached and intermeshing segment-gears -7,' whereby rocking motion imparted to one shaft will be imparted simultaneously to the other shaft 4, but in the opposite direction, so that the feelers 6 will be moved toward and from thelower ends of the series of detectors when the loom isrunning under normal conditions.

By those skilled in the art it will be understood that if a detector when in the lower plane of the shed is released by orthrough failure or undue slackness of its warp-thread suchdetector will drop from the position shown in Fig. 1, so that its lower end will be in the path of the cooperating feeler on the feeling stroke, and the engagement of the feeler with the detector will arrest the-feeler before it has completed its feeling stroke.

The cam-shaft C of the loom has secured to it a fe'eler-cam C and an adjacent huntercam T, shown as a tappet-cam having two Fig. 3,) to be partially embraced by the upper hook-like end an of a movable member or link M, the lower end of the link being pivotally connected at m (see Fig. 1) to an arm m fast on a short shaft on, supported on the loom-frame, such shaft having a knock-off arm m rigidly secured to it and in cooperative engagement with the lower end of the shaft S, the arrangement being such that longitudinal movement of the member or link M in the direction of the arrow 10, Fig. 1, will operate to release the shipper from its holding-noteh in the usual plate N", to thereby automatically stop the loom by any suitable belt-shipping or power-releasing device. (Not herein shown.) The hook m is provided with a bearing-hub 11 (see Fig. 3) on one side, and on the opposite side the hook is extended to form a yoke 12, having a hearing at 13 in alinement with the bearing 11, and below such bearing the yoke is extended to form a stop 14: for a purpose to be described. 7

A rock-shaft 15 is extended through and supported in the bearings 11 and 13 and is surrounded by a spiral spring 16, one end of which is secured to the yoke, while'theother end of the spring is attached to a collar 17, fast on the rock shaft. The spring is so wound as to normally turn the rock-shaft in the direction of the arrow 18, Fig. 3.

A follower 19 is made fast on the rock-shaft 15, as by aset-screw 20, (see Fig. 2,) adjacent the bearing 11, said follower being heldin cooperative relation with the feeler-cam C by the action of the spring 16, whereby rotation of the cam-shaft 0" will rock the shaft 15,

such rocker being efi'ected twice for each revolution of the cam-shaft. The follower is extended below the rock-shaft 15 and then turned laterally to form an elongated tail 21, which,'as shown in Figs. 2 and 3, is located below the nearer portion of the hooked end or head on of the link. This tail constitutes an impact member which moves with the feeler and which operates to effectthe normal feeler movement in a manner to be described.

A rocker 22 (shown separately in Figs. 4: and 5) has hubs 23 24 on its opposite sides to receive and rock loosely on theshaft 15 between the bearing portion 13 of the yoke and the nearer side of the link-head m, the rear end of the rocker being upturned and provided with a boss 25, having a hole 26 through it to receive the lower end'of a connecting-rod 27,

.the upper end of the 'rod being hooked at 28 to form a pivotal connection with an arm 29,

fast on one of the feeler rock-shafts 4. (See Figs. 1 and 2.) The hub 24 of the rocker is cut away for a portion 'of its periphery to present two opposed shoulders 30 and 31, be

tween which extends the tail 21 of the fol-' slower, the distance between the shoulders permitting considerable lost motid'n between the tail and shoulders, as will be manifest from Fig. 3. The rocker has secured to or formed and attached at one end to a collar 34, fast on such rock-shaft, the other end of the spring being secured to one of the bearings, as 4: for the rock-shaft. The spring is so wound that it tends to throw the feelers outward or away from the detectors and to act as a cushion when the feelers are moved inward on their feeling stroke.

Referring to the drawings, particularly Figs. 1, 2, and 3, wherein the feelers are represented as ready to begin their inward stroke when the rotation of the camshaft (1 carries the feeler-cam C forward sufficiently to permit the feeler 19 to rock inwardtoward the cam-shaft, the tail 21 will be lifted and will hit the shoulder 30 of the rocker with a smart blow, the impact thereof being sufficient to turn the rocker on its fulcrumviz. the shaft l5-in the direction of arrow 18 and elevate the connecting-rod 27. This moves the feelers inward toward the detectors, the momentum due to the blow being suflicient to overcome the resistance of the spring 33 and complete the feeling stroke under normal conditions.

hen the continued rotation of the cam-shaft brings the other high portion of the cam G into engagement with the follower, the latter is swung toward the rear of the loom, compressing the spring 16, and then the tail 21 hits the rocker-shoulder 31, and the rocker is returned to the position shown in the drawings, assisted by the action of spring 33 and assuming such position before the impact member or tail 21 reaches its final position, as shown in Fig. 3. Movement of the rocker in the direction just noted-that is, opposite to the arrow 18--is limited by means of a stop 35 on the rocker, which stop brings up against the downward extension 14 of the yoke 12. The timing of the parts is so arranged that normally the turning of the rocker to effect the feeling stroke of the feelers will be in time to depress the hunter 32 before one of the tappets t reaches it, the return movement of the rocker to the position shown in Fig. 3 moving the bunter back again into the path of the tappets as the feelers are swung outward or retracted.

-VVhen a detector is released and descends into the path of the feeler on the feeling stroke, it engages and arrests the feeler when thrown inward, as has been described, and such arrest of the feeler prevents the hunter 32 from. being moved into inoperative posi tion-that is, out of the path of the advancing tappet t. This nearest tappet will then engage the hunter and move it to the left, viewing Fig. 3. and such movement of the hunter by the tappet-cam is transmitted to the themthe feeler be arrested by a released detector.

Consequently the stress of the follower-spring 16 cannot be transmitted to the released, de-

tector, and subjection otthe latter to injurious strain is obyiated." As a matter of fact, the

momentum of the rocker and connected feelers is so nearly counterbalanced'by the resistance of the spring that when 2. released detectoris engaged by'the feeler it receives alight tap, which neutralizes the eflect of the momentum and permits the spring 33 to act. QTheZt'end ency of this spring is to move the feeler away from the detector and to move the bunter 32 more completely into 'operative'position with relation-to the hunter-cam T. It follows that if the released detector should from any cause be lifted above'the feeler after engagement therewith the stopping instrumen talitywill still be operated, inasmuch as such mentality'is not dependent upon a continued engagement of feeler and detector,- as has been shown, the action of the stop-motion is Patent, is' p v 1. In a warp stop-motion forj looms,a seriesmade'more sure and exact.

-'So far .as I am aware the operation of the feeler in a warp-stop-motion mechanism by momentum superinduced by a blow upon a rocking part connected with the feeler is broadly new, arid my invention accordingly-is not restricted to the prccise'construction and arrangement herein shown and described.

Having fullydescribed my invention, what I claim as new, and desire to secure by Letters of detectors, a feeler to cooperate, with a de tector. released by failure .of its warp-thread, rotating feeler and bunter cams, a member adapted to be moved to effect the operation of a stopping instrumentality, a rocker mounted on said member and v operatively connected with the feeler, a hunter governed by the rocker, a follower fulcrumed on the movable member and cooperating with the feeler-cam, and means acting through the follower to oscillatethe rocker by intermittent impact thereon, to therebvmove the feeler toward and away from the detectors, arrest of the feeler by a released detector instantlyacting through I the rocker to cause cooperation of the hunter with the bunter-cam, to move said movable member.

2. In a warp stop-motion for looms, a series of detectors, a feeler to cooperate with a detectorreleased by failure of its warp-thread,

rotating feeler and bunter cams, a'member adapted to be moved to effect the operation of a stopping instrumentality, a rocker mounted on said member and operatively connected through the follower to oscillate the rocker by intermittent impact thereon, to thereby move the feeler toward and away from thedetectors,

arrest ofthe feeler by a released detector in stantly acting through the rocker to cause cooperation of the hunter with the hunter-cam,

to move said movable member. 3. In a warp stop-motion for looms, a serie of detectors, a feeler to cooperate with a detector released by failure or undue slackness of its warp-thread, rotating feeler and bunter cams, a link longitudinally movable to effect the operation of a stopping instrumentality, a rocker mounted on said link and operatively connected with the feeler, a hunter governed by the rocker, a follower fulcrumed on thelink and cooperating with the feeler-cam, and means acting through the follower to oscillate the rocker by. intermittent impact thereon, to thereby move the feeler toward and away from the-detectors, arrest of theffeeler bya released detector instantly acting through the rocker to cause cooperation of the buriter with the hunter-cam, and move the linklongitudinally.

4. In a warp stop-motion for looms, a series of detectors, a feeler to cooperate with adetector released by failure'of its warp-thread,-

rotating feeler and hunter cams a' member adapted to be moved to effect the operation of I rocker to cause cooperation of the bunter with the bunter-cam,to move said movable member. 5. In a warp stop-motion for looms, aseries of detectors, a feeler to cooperate with a detector released by failure of its warp-thread,

. rotating feeler and bunter cams, a link movable longitudinally to effect the operation of a stopping instrumentality, a spring-controlled rock-shaft mounted on the link and having fast upon it afollower to cooperate with the feelercam, a rocker loosely mounted on the rock-shaft and provided with a bunter movable into and out of the path of the bunter-cam, means act' ing through the follower to intermittingly engage and oscillate the rocker by impact therewith, and a connection between said rocker and feeler, to operate the feeler by oscillation of the rocker, arrest of the feeler by a released detector instantly causing cooperation of the hunter and bunter-cam, to longitudinally move the link. v,

6. In a warp'stop-motion for looms, a series of detectors movable into operative position when released by failure or undue slackness of their warp-threads, a vibratable feeler to cooperate with a released detector, momentum-operated means to vibrate the feeler and means adapted to cause the operation of astopping instrumentality by or through engagement of the feeler with a released detector.

7 In a warp stop-motion for looms, a series of detectors movable into operative position when released by failure or undue slackness of their warp-threads, a vibratable feeler to cooperate with a released detector, momentum-operated means to move the feeler on its feeling stroke, a spring to cushion such stroke and thereby reduce the impact of the feeler upon a released detector, and means adapted to cause the operation of a stopping instrumentality upon engagement of the feeler and a detector.

8. In a warp stop-motion for looms, a series of detectors movable into operative position when released by failure or undue slackness of their warp-threads, a vibratable feeler to cooperatevwith .a released detector, a rocker operatively connected with and to vibrate the feeler, means to overcome the inertia of the rocker by intermittent impact therewith, the completion of the stroke being due to its mo mentum, a member adapted by its movement to effect the operation of a stopping instrumentality, and means to cause movement of said member upon engagement of the feeler with a released detector.

9. In a Warp stop-motion for looms, a series of detectors movable into operative position when released by failure or undue slackness of their warp-threads, a vibratable feeler to cooperate with a released detector, means to positively initiate the movement of the feeler toward the detectors, the completion of such movement being due to momentum of the moving parts, and a member adapted to cause the operation of a stopping instrumentality upon such engagement.

10. In a warp stop-motion for looms, a series of detectors, a feeler to cooperate with a detector released by failure of its warp-thread,

rotating feeler and bunter cams, a link movable longitudinally to effect the operation of a stopping instrumentality, a spring-controlled rock-shaft mounted on the link and having fast upon it'a follower to cooperate with the feeler-cam, a rocker loosely mounted on the rock-shaft and provided with a bunter movable into and out of the path of v the buntercam, opposed shoulders on the rocker, a connection between the latter and the feeler, to operate the feeler by oscillation of therocker, and a tail on the follower extended between the shoulders of the rocker and having a limited movement relative thereto,'whereby the rocker is oscillated by impact of said tail upon the rocker-shoulders, arrest of the feeler by a released detector instantly causing cooperation of the hunter and bunter-camto longitudinally move the link. I

1 1. In a warp stop-motion for looms, a series of detectors, a feeler to cooperate with a detector released by failure of its Warp-thread, rotating feeler and bunter cams, a link movable longitudinally to effect the operation of a stopping instrumentality, a spring-controlled follower fulcrumed onthe link and cooperating with the feeler-cam, a rocker coaxial with the follower and loosely mounted to rock" on the link, said rocker-having an attached bunter movable into and out of cooperative relation with the bunter-cam, opposed shoulders on the rocker, a laterally-extended impactmemher on the follower and extended between the shoulders and having lost motion between them, and a connection between the rocker and the feeler to move the latter toward and from the detectors by oscillation of the rocker, engagement of said impact member with the shoulders effecting such oscillation, arrest of the feeler by a released detector instantly causing cooperation of the bunter and bunteriiaflto effect longitudinal-movement of the 12 In a warp stop-motion forlooms', a'series of detectors, a feeler to cooperate with adetector released by failure of its warp=thread,

able longitudinally to effect the operation of a stopping instrumentality, a spring-controlled follower fulcrumed on the link and cooperati ng with the feeler-cam, a rocker coaxial with the follower and, loosely mounted to rock on the link, said rocker having an attached bunter movable into and out'of cooperative relation with the bunter-cam, opposed shoulders on the rotating feeler and bunter earns, a link mov-.

rocker, a. laterally-extended impact member on the follower and extended between the shoulders and having lost motion between them, a cushion-spring to prevent shock when the feeler engages a released detector, a connection between the rocker and the feeler to move the latter toward and from the detectors by or through the oscillation of therocker, engagement of theimpact member with the rocker-shoulders effecting such oscillation,

and a stop to limit feeler-retracting movement of the rocker, arrest of the feeler by a released detector instantly acting to cause cooperation of the bunter and hunter-cam.v

13. In a warpstop-motion for looms, a series of detectors movable into operative position when released by failure or undue slackness of their Warp-threads, a vibratable feeler to cooperate with a released detector, means to positively initiate the movement of the feeler toward and away from the detectors, the completion of such movement being due to m0-' mentum' of the moving parts, a spring to adapted to cause the operation of a stopping instrumentality upon such engagement. I

In testimony whereof I have signed my name to this specification in the presence of two sub- 20 scribing witnesses;

CLARE H. DRAPER.

' Witnesses? GEORGE OTIS DRAPER, E. R. MoRRIsoN.

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