Harness control

Abstract

Claims

A. MOESSINGER HARNESS CONTROL April 15, 1952 Filed Dec. 11, 1946 2 SHEETS-SHEET l 2 m I L T H L 2 2 2: j l INVENTOR. 4.45527 fi/qanrmwse April 15, 1952 A. MOESSINGER 2,592,820 HARNESS CONTROL Filed Dec. 11, 1946 2 SHEETS-SHEET 2 =n LIE; 'I.'= r k5, 53 I 56 I 4D 49 r 4d 59 4! IN V EN TOR. /44 as? 7' flfaasjnvgse A7 TOR/V5 X fatented Apr. 15, 1952 HARNESS CONTROL Albert Moessinger, Winterthur, Switzerland, assignor to Sulzer Freres, Societe Anonyme, Winterthur, Switzerland Application December 11, 1946, Serial No. 715,515 In Switzerland December 12, 1945 16 Claims. I The present invention relates to a loom for weaving and has for its object the provision of a harness operating mechanism which is positi-Vely driven with the loom during normal weaving and which includes control means which permit operation of said mechanism independently of the other parts of the loom, for example for producing a predetermined rest position of the harness when the loom is at rest. It is an object of the present invention to provide means for closing and reopening the shed, in a simple manner, out of any operating position of the harness, whereby standstill periods due to failures, as for instance caused by thread breaks, are reduced. Further and other objects of the present invention will be hereinafter set forth in the accompanying specification and claims and shown in the drawings which, by way of illustration, show what I now consider to be preferred embodiments of my invention. In the drawings: Fig. 1 is a diagrammatic showing of the harness operating mechanism according to the invention in an operating position; Fig. 2 illustrates the mechanism shown in Fig. l in a position where the heddles are at rest; Fig. 3 diagrammatically shows a modified harness operating mechanism according to the invention, in an operating position; Fig. 4 illustrates the device shown in Fig. 3 in a position where the heddles are at rest. In the modification shown in Fig. 1, the harness operating mechanism comprises motion initiating means having cams and 2, which act as driving members and are keyed on a shaft 3 carried in bearings 3a and connected to the loom drive. Cam cooperates with roller 4 and cam 2 with roller 5, the rollers being carried by a rocker member 8 having an extension The rocker 6 swings on a retractable shaft 8 which is supported by a hanger member 9 and rotatable in one end of link member I which is swingable about an eccentric disk l2. Member 9 hangs on the stationary pin II. There is a second rocker 6' swingable on shaft 8 and having rollers 4' and cooperating with cams and 2 respectively, for operating a second heddle frame 28'. In loomshaving more than two harness frames, there is a corresponding number of'cams and rockers. A control member 36 is pivotably connected to link member 9; this control member is operativelyconnected with an operating member of the loom drive, or with a clutch between said operating member and the shaft 3. Member 3'6 is responsive to the position of the shaft 8 and actuates means preventing operation of the loom when said shaft is displaced from its normal operating position. Such means are conventional and therefore not illustrated. The eccentric disk [2 is provided with a journal l3 resting in a bearing M and is connected through a chain I5 and bevel gears IE to a clutch 1| through which it may be connected, for instance to the loom drive or to a hand drive. A driving rod I1 is equipped at one end with a head l8 having a plurality of apertures l9 into which a pin at the end of the rocker 6 may be .inserted. The other end of the driving rod I1 is pivotably connected, by means of a pin 20, to a bell-crank lever 2|, which is carried by a stationary pin 22. The bell-crank lever 2| is connected by means of another driving rod 25 to a bell-crank lever 24 supported by stationary pin 23. The bell-crank levers 2| and'24 are individually pivotably connected to bars 21, which extend through guides 21a andare connected to the heddle frame 28. The heddle frame has upper and lower bars 29 on which the heddles 30 provided with eyes 3| are mounted. The warp threads 32 extend through the eyes 3|. Rocker 6' actuates bell-cranks 2| and 24' which are interconnected by rod 25'. The bellcranks 2| and 24' actuate the frame 29' for heddles 38' having eyes 3| by similar means as those by which bell-cranks 2| '24 actuate the heddle frame 28. During normal weaving operation the shaft 3, driven by the loom drive, rotates with the cams and 2 in the direction of arrow 33. Subsequent to the position shown in Fig. 1 the cam 2 presses on the roller 5 and moves the rocker 6 into its right end position 6a which is the position occupied by the actuating means for the second heddle frame 28' The mechanism 2|, 25, 24, 26 brings the frame 28 into its lowest position. When the rocker is in the end position 6a, the cam l presses on the roller 4, causing the rocker 6 to move counter-clockwise, whereby the frame 28 is pushed into its upper end position. The continued rotation of the cams l and 2 imparts a reciprocating movement to the frame 28. In case of an irregularity, for instance if a warp thread 32 breaks, the loom is brought to rest in a known manner. The cams 2 and the heddle frame actuated by them come to rest simultaneously. For removing the cause of the standstill, for instance for inserting a new warp thread 32, it is desirable that the shed be closed; this 3 is accomplished by moving all heddle frames into positions in the middle between the upper and lower end positions. As shown in Fig. 2 the harness frames 28, 28, etc., are brought from any operating position into the position of rest corresponding to the preferably closed shed, which, for instance, may be the middle position of the heddle frame, by engagement of clutch mechanism ii whereby the eccentric disc l2 which is connected to the loom drive is operated by the chain l5 which turns the eccentric disc i2 through 180 into position iZa. Thereby member H] is moved into position lilo through a distance corresponding to the double eccentricity. As soon as this new position has been reached, mechanism H automatically interrupts the drive of chain 15. Clutch mechanism i! may be of the type disclosed in Fig. '7 of my co-pending application Ser. No. 612 ,864,'filed August 27, 1945, and which is also illustrated in Figs. '9 to 11, re-numbered 6 to 8, of my application Ser. No. 767,418., filed August 8, 1947, under the Boy kin act. It disengages automatically after rotation'through a predetermined angle. The shaft 8 is brought by the motion of the eccentric l2 into the position 8a, and therod 9 into the positioned. Thereby member '35 is displaced into the position a. and prevents operation of the loom or of shaft 3 by means not shown. The rocker Bis drawn to the arresting or abutment mean's34 and 35 and rests in position 5!), whereby' the harness frame is held in a position corresponding'to that in which the shed is closed. The rollers 4, '5 are thereby removed from the cams into the positions 4a and 5a. "When the weaving defect has been removed, the eccentricdi'sc I2 is brought back into the operating position of Fig. l and the rollers 4 and 5 contact the cams l and 2 again and move the frame 28 into the position which it had when the loom was stopped. The control linkage 3'5 is brought back simultaneously into its normal position, and normal weaving can be resumed by 'econ'necting the shaft 3 to the loom drive. Instead of driving each individual frame 28 of a loom by means of individual pairs of cams and two rollers co-operating therewith, other drive mechanisms may be used, as long as they are positive. "In the harness frame drive shown in Figs. 3 and 4 motion initiating means comprising a driving rod 55 is pivotably connected to a rocker or motion transmitting member 55 by means of a pin 55. Rod 55 is driven by an eccentric 5| or by a 'dobby. The rocker 56 is equipped with a pivot pin-3"! held pivotably between two bearing blocks 58 forming a retractable support for the fulcrum 31. These blocks are guided between guides 38, and "each of them is connected to a system of levels, each of which is arranged in mirror image fashion with respect to the other. Each block 58 is attached pivotably 'to an operating bar 59 swingably connected by a pivot pin 49 to a rod '42 and to the shorter arm of a bell-crank lever A! which is supported on a stationary pin :34. The longer arms of the bell-crank levers M are individually pivotab'lyconnectedto cranks 45, a throughlinks 43. The cranks 55, 55a which are set'at an angle of 180 are fixed to a shaft 58, on which. a toothed wheel s! is mounted. The toothed wheels! is connected through a chain 15 and a clutch, as in the embodiment of the invention'shownin Fig. l, to a'drive, for instance the loom drive or a hand drive. The rods are connected individually through pivot pins 38 to rods 49 and 59. The rods 49 Looms are usually fitted .with several harness frames and several rockers 56 may be controlled by two bearing blocks 58 extending over a suitable length and at right angles to the plane of the drawing and may cooperate with sliding shoes 52 common to all rockers. During normal operation of the loom the lever systems operating the heddle frames are in the position shown in Fig. 3. The pin 31 is held between the two bearing blocks 58. The sliding shoes52 are so faiapart that the rocker 56 can make the required rocking movements. If it is desired to place the heddle frames 28 into their middle positions corresponding to a closed shed, for example for correcting weaving defects, such as caused by a broken warp thread, the loom is brought to rest by means not described because they do not form part of the present invention, whereby the heddle frames stop in whatever operating position they are at the moment the loom is stopped. For forminga closed shed the chain I5 is moved to rotate the cranks 45 and 45a through 180 into the position shown in Fig. a. This causes displacement of the lever systems into the positions shown inFig. 4. The two bearing blocks 58 are thereby'movedoutward and the two sliding shoes 52 inward-and the driving bar 54 is brought and arrested in its middle position which corresponds to the position of the closed shed. In doing this it does not matter what position is takenupby the bar55 andthe eccentric or the dobby '5'l'sincethe rocking lever can assume any position where its pin 55 is in middle position defined by the closed-in sliding shoes 52. After the weaving defect has-beenremoved, the lever systems are brought back into the positions shown in Fig. '4 by rotating the cranks 45 and'45a through The sliding -shoes 52 are thereby brought into theiroutermost positions and-the bearing blocks -58 are brought together and hold the pin 31in its middle position. The rockerr56 swings'about the pivot pin-3l-and, actuated-by the driving bar-55, forces the'heddle frames,- by meansof the driving bar-54 intothepositionjcorresponding to the position of the'eccentric 51 and normal weaving operations are resumed. While I believe the above described embodiments of my invention to be preferred embodiments, I wishit to be understood that I do'not desire to be limited to the exact detailstof design and construction shown and described, for-obvious modifications will occur -to a person skilled in the art. 6 I claim: 1 1. In a loom for weaving, a'heddle framepa heddle frame operating mechanism'comprising motion initiatin means, a rocker'member having a displaceable fulcrum and being connected with and adapted to be rocked by said initiating meansand being connected-with and operating said heddle frame, and fulcrum displacing means connected with c said fulcrum and 1 adapted :to temporarily afford displacement .of .said: fulcrum and to render the effect of said initiating means on said rocker member ineffective. I 2. In a loom for weaving, a heddle frame, a heddle frame operating mechanism comprising motion initiating means, a rocker member having a displaceable fulcrum and being adapted to be engaged and rocked by said initiating means and connected with and operating said heddle frame, fulcrum displacing means connected with said fulcrum and adapted to afford temporary displacement of said fulcrum and separation of said rocker member from said initiating means, and abutment means adapted to abuttingly engage said rocker member and hold it in a position corresponding to a predetermined position of said frame when said rocker member is separated from said initiating means. 3. In a loom for weaving, a heddle frame operating mechanism comprising heddle frame operating means, motion initiating means, rocker members connected with and adapted to be rocked by said initiating means and each having an end portion comprising pivot means swingably and individually connected with said operating means and having each another end portion comprising a rocker fulcrum, displaceable fulcrum engaging means disposed adjacent said other end portions, displaceable positioning means disposed adjacent said first end portions, and displacing means interconnecting said positioning means and said engaging means and adapted to position, temporarily, said first end portions in a predetermined position and simultaneously release said engaging means and affording lateral movement of said other end portions. 4. In a loom for weaving, a heddle frame, a heddle frame operating mechanism comprising motion initiating means, a rocker member having a fulcrum displaceable transversely to the rocking axis and being rocked by said initiating means and connected with and operating said heddle frame, and fulcrum displacing means connected with said fulcrum and comprising crank means affording, in one dead center position, placement of said fulcrum where said initiating means are fully effective on said rocker member as to the operation of said heddle frame and, in the other dead center position, placement of said fulcrum where said initiating means are ineffective on said rocker member as to the operation of said frame and the latter is in a predetermined rest position. 5. In a loom for weaving, a heddle frame, a heddle frame operating mechanism comprising motion initiating means having cam means, a rocker member having a displaceable fulcrum and being connected with and operating said heddle frame and having rollers adapted to engage said cam means, and fulcrum displacing means connected with said fulcrum and adapted to afford temporary displacement of said fulcrum and disengagement of said rollers from said cam means. 6. In a loom for weaving, a heddle frame operating mechanism comprising heddle frame operating means, motion initiating means, a rocker member having a displaceable fulcrum and being adapted to be engaged and rocked by said initiating means, fulcrum displacing means connected with said fulcrum and adapted to afford temporary displacement of said fulcrum and separation of said rocker member from said initiating means, said frame operating means comprising a connecting rod member, and connecting means swingably interconnecting said rocker member and said rod member and being displaceable on the latter. 7. In a loom for weaving, a source of power, heddle frames, a heddle frame operating mechanism comprising actuating members driven by said source, intermediary members individually positively engaged and operated by said actuating members and individually connected with and positively operating said'frames, control means positively engaging said intermediary members and adapted to render same ineffective as to the operation of said frames, and a selfdisengaging clutch means interposed between said source and said control means and temporarily connecting said control means with said source. 8. In a loom for weaving, a heddle frame, a heddle frame operating mechanism comprising a movable driving member, a motion transmitting member connected with said driving member and with the heddle frame, a normally stationary support for said motion transmitting member to which it is pivotally secured, a releasable holding mechanism for said support for normally holding the support stationary, and when released, for retracting the support, whereby the motion transmitting member is rendered ineffective. r 1 9. In a loom for weaving, a heddle frame, a heddle frame operating mechanism comprising a movable driving member, a motion transmitting member connected with said heddle frame and operatively connected to said driving member, anormally stationary support for said motion transmitting member towhich it is pivotally secured, and releasable holding means for said support for normally holding the support stationary, and when released for retracting the support whereby the motion transmitting memher is disconnected from the driving member. 10. In a loom for weaving, a heddle frame, a heddle frame operating mechanism comprising a movable driving member, a motion transmitting member connected with said driving member and with the heddle frame, a normally stationary support for said motion transmitting member to which it is pivotally secured, a releasable holding mechanism for said support for normally maintaining it stationary, and when released, for retracting the support, a pair of abutments for contacting two surfaces of said motion transmitting member to hold it stationary when the pivot support is released from its normal stationary position, and a linkage connected to the support holding mechanism and to the abutments for simultaneously retracting the support from its normally stationary position and producing relative movement toward each other of said abutments for bringing them in contact with said motion transmitting member whereby the heddle frame is held stationary. 11. In a loom for,weaving, a heddle frame; stationary arresting means; a heddle frame operating mechanism comprising motion initiating means, motion transmitting means connected with said frame and comprising a lever alternatively engageable by said initiating means and by said arresting means, a shaft displaceable transversely to its longitudinal axis and swingably supporting said lever, and control means comprising a displacing member connected with said shaft for placing said shaft and said lever for engaging the latter either with said initiating means for normal operation o a d ram or mih saida s ne e n -fir e tin sa d m ch n s an sai rame in a predetermined position. :12 I a lo m Q W a n a u al f in dle frames-aheddle frame operating mechanism comprising motion initiating means, individual ot o t a ti mean d v du ll onnected with said frames and individually comprising a lever engageable by said initiating means, a shaft displaceable transversely to its lon itud nal axi a s-swi e up o t g sa d levers, ancicom means comprising a d sp ac ingmember connected with said shaft for alternativeiy p acin sa d ft and v a l ve s e engaging the latter with said initia in -means for; normal operation of-said frames or for disengaging said levers from said initiating means. :l al czm o e r ng a l ra Q i c s l frames. 1 hedd e fram e t n m c aism c isin motion n ia n m ans i dividual motion transmitting means individually connected with said frames and individually comprising a lever engageable by said initiating means, stationary arresting means common to all levers and engageable thereby, ashaft displaceable transversely to its longitudinal axis ndswin ab y. u p t n sa v rs nd t-rol means comprising adisplacing m ember connected with said shaft for alternatively placing said-shaft and said levers for engaging the latter either with said initiating means for normal operation of said frames or with-said-arresting means for arresting-said mechanism and said frames in a predetermined position. lfL'IIl a looinfor weaying, a plurality of heddle frames, a;hedd1e frame operating mechanis m isi mo in a n m n dividual motiQ transmitting means individually connected with said frames and individually comprising a --;member engageable by said initiating means, arresting means common to all sa dm m and .ensae ab eb a sha n vqtal .su nqr in s member a en u u support for saidshaft rendering the shaft displaceable transversely to its longitudinal axis, and displacing means comprising an eccentric and a link. member interconnecting the eccentric with said shaft for placing, upon rotation of said eccentric, said shaft and said members for engaging the latter either .vvith said initiating means for normal operation of said frames or with said arresting means for arresting said mechanism and said frames in a predetermined position. 1.5. In a loom for weaving, a source of power, a heddle frame, a heddle frame operating mechanism comprising motion initiating means connected to and operated by said source, motion transmitting means connected with said heddle frame and comprising a member engageablewith and normally engaged by said initiatingmeans, a retractable support for said member, retracting means connected with said support for retracting said support and disengagv ing said member from said initiating means, and operating means connected with said retracting means and with and operated by said source. 16. In a loom for Weaving as set forth in claim 15, said operating means comprising clutch means for connecting and disconnecting said retracting means to and from said source. ALBERT MOESSINGEB. REFERENCES CITED The following references are of record inthe file of this patent: UNITED STATES PATENTS Number Name Date 191,317 Crompton May 29, 1877 454,135 Hutchins June 16, 1891 550,450 C'avanaugh Nov. 26, 1895 1,759,673 Thatcher May 20, 19 30

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