US498912A - Rise-and-fall jacquard mechanism - Google Patents

Description

ou. 9 oo .Il 6.. nu MJ Nm A Lb En GG ...nt M.a SMD.. NA AU Vw ...LA Td Wm A P. D N A E s Il R2 1 9 U oo e Qu M .4 0 O m N x h4: Nowms versus co.. Pnornumo.. wAsnlNsTcN, u. c.

UNITED STATES PATENT OFFICE.

WILLIAM EVANS, OF BIRMINGHAM, CONNECTICUT.

RISE-AND-FALL JACQUARD MECHANISM.

SPECIFICATION forming part of Letters Patent No. 498,912, dated J' une 6, 1893.

Application tiled February 27, 1893. Serial No. 463,948. (No model.)

T0 @ZZ whom it may concern:

Be it known that 1, WILLIAM EVANS, a citizen of the United States, residing at Birmingham, in the county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Rise-and-Fall J acquard Mechanisms, of which the following is a specification, reference beinghad therein to the accompanying drawing.

My invention relates to what are known in the art as rise and fall Jacquard mechanisms. In a Jacquard mechanism of this class, the vertical hooked wires are moved up and down in the opening and closing of the sheds, by what are known usually as a griff and a hook plate, which are moved simultaneously in opposite directions,the griff rising and the hookplate descending in the opening of a shed, and the griff descending and the hook-plate plate ascending in the closing of a shed. It has been proposed heretofore to so operate the griff and hook-plate as that the hook-plate shall be caused to dwell or momentarily restat or about the time of the complete closing of the shed, this dwell or rest in the movement of the hook-plate having been secured by devices which are shown and described in United States LettersPatent to GeorgeW. Stafford and C. H. Poland, No. 420,119, granted Jan uary 28, 1890. Thereasonsforthusoperating the hookplate are fully set forth in the specication of the said patent, to which reference may be made, and need not be repeated herein. It has been proposed heretofore, also, to operate the griff and hook-plate so as to occasion either a dwell of both, or a dwell of the hook-plate alone after the shed has been fully opened, the object in the first case being to give the shuttle fair opportunity to pass completely through the shed while the opposite planes thereof remain separated sufficiently to give it unobstructed passage, and in the second `case the object being to provide against the shuttle becoming lifted from contact with the shuttle-race, or diverted from its proper line of movement, in consequence of the rising of the bottom plane of the shed before the shuttle has completed its flight from one side of the loom to the other.

My invention has forits main object to provide in a simple and practical manner for seas hereinafter is made clearly to appear, and A it rst will be fully described with ref'erence to the accompanying drawing, and then will be particularlypointed out and precisely delined in the claims appended to this specilication and making a part hereof.

The accompanying drawing shows in side elevation a portion of a rise and fall Jacquard mechanism of usual construction, with my invention applied thereto, enough of the said mechanism being represented to render clearly apparent the nature and relations of my invention. v

At 1 is shown the trame-work of the Jacquard mechanism, at 2 a supporting beam, at 3 the usual operating lever, the same being actuated in known and suitable manner from one of the rotating shafts ofthe loom to which the Jacquard mechanism is applied.l

At 4l is shown the pivotal support for lever 3, the said support being secured to the beam 2.

At 5 is shown the griff, and at 6 is shown the hook-plate.

All of the foregoing, and such of the details necessary to a complete and operative Jac` quard mechanism as are not shown in the accompanying drawings, are or may be of any known or suitable construction.

At 7 is a rocker which is pivoted at 8 to the end-piece 9 forming part of theframe-Work 1.

At 10 is a link or connection which at one end thereof is connected pivotally with one arm 11 of the rocker 7 and at the other end thereof is connected pivotally'with the griff 5, and at 12 is a second link or connection which at one end is connected pivotally with the other arm 13 of the rocker 7 and at the other end thereof is connected pivotally with the hook-plate 6. The arm 11 also has connected therewith pivotally one end of a link or connection 14, the other end of which is connected pivotally with one arm 15 of a IOC 15 of the second rocker 16 enables thelink orv connection 14 to be pivotally connected with the said arm at any desired radial distance from the axis on which the said rocker turns, and thus provides for varying the throw transmitted through the link or connection 14, and thereby varying the size of the opening of the shed.

The points at which the links or connecl tions 11 and 12 are connected with the rocker 7 are at any desired andsuitable angular disi tance apart, this distance depending in part upon whether both the griff and hook-plate or only one of them shall be caused to dwell as the said rocker is moved. l have shown the said distance as being less than one hundred and eighty degrees, inasmuch as in themechanism illustrated I contemplate producing by the action of the said rocker a dwell of only one .of the parts actuated therefrom.

the rocker 7 will ordinarily be proportioned and arranged in such 4manner that as the said rocker is caused to near the end of its stroke in one direction, and thereby reaches the position which it .occupies at the time of one extreme in theshed-formation, one of the points l of pivotal connection of the links or `connec- I,

tions 11, 12, therewith will reach or pass slightly beyond a dead center, this occasioning a dwell in the movement of the corre-' Preferably, the arrangement, dac., are such as to cause the hookplate thus to dwell at the time ofthe closing of the shed, in order to secure the mode of. operation and results which are set forth in L spending actuated part.

Letters Patent No. 420,119, hereinbefore mentioned. With the object in view of securing a dwell of both the griff and. the hook-plate at the other .extreme of the shed-formation, which, in this instance, is when the shed is open, the second rocker 16 ordinarily is connected and arranged by me in the manner shown in the drawing to cause the pivotal connection between the same and the link or connection 14 to reach vor pass slightly' a dead center at the time when the shed has been opened fully.

Each of the links or connections 1-0, 12, 14 and 18 is made variable in length. A suitable construction thereof is shown in the drawing, in which each of the said links or connections is made in two parts. These parts are slotted where they koverlap eachother, as

, at 101, and through the slots pass bolts 102 for holding them adjustably together. By making the said links or connections variable in length I am enabled to eect readily desired or necessary adjustments thereof, and

The parts intermediate the operating lever 3 and t to vary the action of the griff and hook-plate in important respects. For example, by lengthening the links or connections 1 4 and 18, the position of the rocker 16 may be so changed as not to allow the point of pivotal connection between it and the link or connection 1-1E to pass the top center, and thus less than the full attainable amount of dwell at the time of the open shed may be obtained. In proportion as the lengtheningis continued the amount of dwell will be reduced. lf this lengthening be continued to a sufficient eX- tent, the dwell may be prevented altogether from occurring. link or connection 14, and the shortening of the links or connections 10 and 12, the position of the rocker? maybe changed similarly so as to reduce the amount of the dwell of the hook-plate when the shed is closed, and if .this lengthening is continuedtoa sufficient extent the dwell will disappear. Should it be desired at anytime to raise orlower -theJ acquard harness, which heretofore has been accomplished, usually, by raising and lowering the entire Jacquard mechanism, it is necessary only to adjust or `vary in obvious manner the lengths ofthe links `or connections lOand l2. By eecting adj ustmen-t of the linkor connection 1-2, the height of the lower plane of the open shed may be regulated, and therehythe said lower plane may be made to hear properly upon the shuttle race of the loom.

The rocker 16 will usually be mounted on one end of a rock-shaft 169, the latter being ,extended through -to the other end of the Jacquard mechanism, where the connections intermediate the said shaft and the griff and hook-plate will he duplicated, as will be understood.

What l claim is- 1. The combination .with the griff and hookplate of a rise and fall Jacquard mechanism, links .or kconnections connected therewith, and a rocker to which said links or connections are connected, of a link or connection connected with the rocker for moving the same, a second rocker having the point of connection of the last-mentioned link or connection therewith adapted to reach or pass slightly a center in ltheturningof the second rocker, to occasion a dwell of both the griff and hook-plate at one extreme vof the shedformation, and means for operating the second rocker, substantially as described.

2. The combination with the griff and hookplate of a rise and fall Jacquard mechanism, links or connections connected therewith, and a rocker having one of the poi-nts .of connection of the said links or connections therewith adapted to reach or pass slightly a center in the movement of the rocker, for the purpose of occasioning a dwell of the correspending actuated part at one eXtreme .of the shed-formation, of a third link or-con-nection whereby to move the said rocker, a second rocker having the point of connection of the third link or connection thereto adapted to By the lengthening of the- IOO IOS

reach or pass slightly a center, for the purpose of occasioning a dwell of both the griff and the hook-plate at the other extreme of the shed-formation, and means for operating the second 1'ocker,substantially as described.

3. The combination with the griff and hookplate of a rise and fall Jacquard mechanism, linksor connections of variable length connected with both thereof, a rocker with which said links or connections are connected also, and means for actuating the said rocker, whereby by varying the operative length of the links or connections the Jacquard vharness may be raised and lowered and the height of the lower plane of the open shed may be regulated Vsubstantially as described.

4f.V The combination with the grii and hookplate of a rise and fall Jacquard mechanism, links or connections of variable length connected with both thereof, and a rocker having one of the points of connection of the saidV links or connections therewith adapted to reach or pass slightly a center in the movement of the rocker, for the purpose of occasioning a dwell of the corresponding actuated part at one eXtreme of the shed-formation, of a third link or connection also variable in length whereby to move the'said rocker, and means for moving the said third linkorconuection,wherebyby varying the operative length of the links or connections the Jacquard harness may be raised and lowered, and the height of the lower plane of the open shed may be regulated, and also the amount of theV aforesaid dwell may be varied, substantially as described.

5. The combination with the gri and hookplate of a rise and fall Jacquard mechanism,

links or connections of variable length connected with both thereof, and a rocker having one of the pointsv of connection of the said links or connections therewith -adapted to reach or pass slightly a center in the movement of the rocker, for the purpose of occasioningadwell of the corresponding actuated part at one extreme of the shed-formation, of a third link or connection alsovariable in length whereby to move the said rocker, a second rocker having the point of connection of thelast-mentioned link or connection therewith adapted to reach or pass slightly a center in the turning of the second rocker, to occasion a dwell of both the griif and the hookplate at the other extrexneof the shed-formation, and means for moving the said second rocker, substantially as described;

6. The combination with the griff and hookplate of a rise and fall Jacquard mechanism, links or connections of variable length connected with both thereof and a rocker having one of the points of connection of the said links or connections therewith adapted to reach or pass slightly a center in the movementof the rocker, for the purpose of occasioningadwell of the corresponding actuated part at one extreme of the shed-formation, of a third 'link or connection also variable in length whereby to move the said rocker, a second rocker having the point of connection of thelast-mentioned link or connection therewith adapted to reach or pass slightly a center in the turning ofthe second rocker, to occasion a dwell of both the griff and the hook.-l

plate at the other extreme of the shed-formation, a link or connection of variable length connected with the second rocker for moving the same, and meansfor moving the link or connection last-mentioned, substantially as described. w 7. The combination with the griff and hookplate of a rise and fall Jacquard mechanism, links or connections connected therewith, and a rocker having one of the points of connection of the said links or connections adapted to reach or pass slightly a center in the movement of the rocker, for the purpose of occasioningadwell of the corresponding actuated part, of alink or connection of variable length connected with the said rocker for moving the same, a second rocker having the point of connection of thesaid link orconnection there- IOO In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM EVANS.Y

WVitnesses:

S. I-I. LEssEY, WM'. S. BROWNE.

Images