US666787A - Shedding mechanism for looms. - Google Patents

Description

Patented 1am-.29, Ism.

H. www. SHEDDING MEGHNISM -FB LUOMS.

(Applieatiun led,0ct.30, 1899.)

A4 Sheets-Shut L (No Modem JMW Patented lan. 29, |90I. H. wyMAN. SHEDDING MECHANISM FORl LOOMS.

(Application med Oct. 30, 1899.) n

4 Sheets-Sheet 2.

(No Nudel.)

Patented Jan. 29, |901.

H. W-AYMAN. SHEDDING MECHANISM FOR LOOMS.

(Application led Oct. 80, 1899.

4 Sheets-Sheet 3.

(N6 Model.)

'ms mams frans co. www-mo, WASHINGTON. n. c.

l No. 666,787.-

. Patented 1an. 29, I90I.D H. WYMAN. SHEDDING MECHANISM FDR LDOMS.

(Application led Oct. 30, 1899.)

v4 sheets-sheet 4.

(No Model.)

mi Nanms PETERS co, Puoro-Lxwov. wAsmNcTou. nA c.

. UNITED STATES PATENT OFFICE.

-HORACE VYMAN, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO THE CROMPTON da KNOWLES LOOM WORKS, OF SAME PLACE.

SHEDDING M ECHANISM FOR LOOlVlS.

SPECIFICATION forming part of Letters Patent No. 666,787, dated January 29, 1901. Application led October 30,1899. Serial No. 735,288. (No model.)

To all whom/ it may con/cern:

Be it known that I, HORACE WYMAN, of Worcester, county of Vorcester, State of Massachusetts, have invented an Improvement in Shedding Mechanism for Looms, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

The invention herein to be described is intended to be an improvement on that class of looms designated as dobby, one form of which is represented in United States Patent No. 459,474, dated September 15, 1891.

The present improvement relates to a new manner of positively actuating the harnesslevers by novel means. In the patent referred to the harness-levers were moved positively to put their connected harness-frames and warps carried thereby into the upper or lower plane of a shed by devices designated as carriages, which besides engaging the notched jacks in their outward movement to open the shed in their return movements acted to turn said harness-levers in a direction to depress the harness-frames and put the warps carried by them into the lower plane of the shed. In said loom the lever connections were pivoted upon the harnesslevers and were provided at their upper and lower ends with a notched jack, one or the other of which, in accordance with the demand of the pattern-surface, was engaged by one of the carriages to turn a harness-lever in the direction to lift the harness-frame connected with it; but herein I have joined operatively with the opposite ends of said connections a notched jack, which may be engaged by the shed-forming knife when it is desired to put a harness-frame into the upper plane of the shed, and also a depressingjack, which is acted upon by said knife to put a harness-frame in the lower plane of the shed.

In accordance with my invention I have provided a series rof double-ended harnesslevers with suitable inclines or faces located thereon at a short distance from the fulcra about which the levers turn, and at opposite sides of said fulcra I have provided a series of harness-lever-actuating cams or slides,

each having suitable inclines to ,coperate with the inclines of the harness-levers, and I move said cams by or through connections which are entirely separate from the usual harness-levers, each of said connections having operatively joined at each of its ends a pair of jacks. The knives in their reciprocating movement act alternately on the jacks of each pair, each knife in its outward movement acting on one jack of a pair to put the connected harness-frame in one plane of the shed-as,A for instance, the Lipper planeand in its opposite lnovement acting on the other jack of the pair to put the said harness-frame in the other or lower plane of the shed, each knife in engagement with a jack moving it always in the same direction to place the harness-frame connected therewith in the same plane of the shed. As herein shown, when either of the shed-forming knives move outwardly it will by the engagement of a jack move a harness-frame from the lower plane of the shed into the upper plane thereof, such direction of movement being due to the fact that the pin or projection carried by the actuator and upon which is mounted the connection is located below the rod constituting the pivot for the actuator rather than above said pivot, and therefore it will be understood that should the said pin or projection on which the connection is mounted be located above the rod supporting the actuator then when the shed-forming knife moves outwardly in engagement with a jack it would move the harness-frame connected with said jack from the upper plane of the shed into the lower plane thereof. j

The cams under the control of the connections referred to are herein represented as shaped to not only move the levers positively, but also to assist in locking them in their extreme positions for one or more sheds.

The connections may be mounted upon intermediate devices, hereinafter designated as actuators, the actuators being shown as having pins to constitute pivots for the connections, said actuators, mounted on a suitable supportng-rod, being constructed to engage the slides having the cams for moving the harness-levers.

Figure 1 shows in elevation, viewing it from IOO its rear side, a sufficient part of a loom of the class specified to enable my invention, herein represented in one of the best forms now known to me, to be understood. Fig. 2 on a larger scale represents two harness-levers and parts cooperating therewith to put said levers in their extreme positions and the patternsurface. Fig. 3 is a partial section to the left of the dotted line x, Fig. 2. Fig. 4 is a partial section to the left of the dotted' line w', Fig. 2, said two figures showing the grids or guides for the depressor-jacks. Fig. 5 is an inner edge view offene of the harness-levers. Fig. 6 shows one of such levers, an operatingcam, and an actuator. Fig. shows the cam by itself looking at the side of it next to the lever. Fig. 8 is a detail showing three harness-levers, their attached connections, and actuators looking at the outer edges of the harness-levers. Fig. 9 represents one connec: tion with a pair of notched jacks at each end, one of said jacks being described as a liftingjack and the other as a depressing-jack. Fig. 10 is a top or plan View of the device shown in Fig. 9. Fig. ll is a view below the dotted line :62, Fig. 9. Fig. 12 shows an actuator in side and in edge view, and Fig. 1 3 represents a guide to be described.

The loom-frame A has erected upon its top, as represented, three sets of roller-sheaves A A2 A3, over which are extended the upper stretches of cording A5, connected in usual or suitable manner with the upper ends of harness-levers A6, the upper stretches of said cording being joined in usual manner to the upper bars of the harness-frame A7. The lower bars of said frames are united by under stretches of cording AS, passed about sheaves A4, with the opposite or lower ends of said harness-levers, they being suitably pivoted on a proper rod or fulcrum A9, held in any usual manner in the loom-frame.

Herein the connections B, one for each harness-frame, instead of being pivotally mounted on theharness-levers oran extension therefrom, as in the patent referred to, are mounted on studs or projections B of actuators B2, represented as having their h ubs slotted, as at B3, to fit over and be sustained by a rod B4, occupying a position substantially parallel with relation to the rod A9 sustaining the harnesslevers, each of said actuators, as herein shown, having an arm or projection BX, which is adapted to engage a harness-lever-moving.

cam or cam-slide C', said arm, as herein shown, entering a suitable notch C (see Fig. 6) in said cam, the cam being depressed Whenever a harness-lever is to be acted upon to effect the lifting of its attached harness-frame and the cam being lifted whenever a harness-lever is to be moved to depress its cooperating harness-frame and put it into the lower plane of the shed. The cam C is sustained and guided by suitable guides C4 G5, occupying a iixed position with relation to the frame of the loom, said guides acting to insure, as herein represented, the lmovement of the cams in straight lines. As herein'represented, each cam C' has two acting faces or inclines c c',

which cooperate with suitable inclines, as aa', 7o

of the harness-levers, the inclines a being represented as located at one side .the rod A9, while the inclines a are located at the opposite side thereof. These cams C', while they act to turn the harness-levers about the fulcrum A9, also act when in their extreme positions to lock the harness-levers in their extreme positions to thereby maintain the Warps in the proper plane of the shed, said cams also acting while turning the harness-levers 8o about their fulcrum to prevent the levers from moving at a faster speed than that determined by the movement of the shed-forming knives.

I am the first, as I believe, to turn a doubleended harness-lever about its fulcrum in opposite directions by or through a cam actuated by a connection provided at its opposite ends with apair of jacks adapted to be moved by a shed-forming knife, I employing two 9o line or direction of movement of the cams,

nor is the invention to be limited to the particular shape of the actuator employed to move the cams, as it will be understood that said devices might be variously modified or changed in shape by the exercise only of mechanical skill and not invention and yet accomplish the purpose set forth herein, and herein I intend to claim, broadly, any intermediate mechanism between a harness-lever and an independently-supported pivoted connection provided at its ends with a pair of jacks adapted to be moved by a pair of shedforming knives reciprocating in reverse direction, one pick in one direction and the ICO next pick in the opposite direction to move 11o the harness-lever to form sheds, is comprehended by and is within the scope of my invention.

Each connection B has operatively joined to it at its upper end a notched lifting-jack b, and at its lower end it has a like notched lifting-jack h', and also at its upper end each connection has a depressing-jack b2, and at its lower end there is a like depressing-jack b3, and, as herein shown, the depressing-jacks are pivoted directly upon the ends of the lever B, said depressing-jacks having pivots 19X to sustain the lifting-jacks, although the lifting-jack and the depressing-jack may have one pivot common to both upon the end of the connection B, if desired. The lifting and depressing jacks at one end of the connection are herein designated as a pair of jacks. The lifting-jacks have suitable projections b4 b5, which may be engaged at the proper times, due to the exigencies of the patternsurface E, of usual construction, by one or the other of the shed-forming knives h6 or b?, said knives being free to slide in suitable slots in the dobby-head F, said knives being connected at their opposite ends (see Fig. l) by rods 117 bs with a suitable lever b, pivoted at blo and actuated by a suitable rod Z712, connected with said lever and with the crank-pint13 of a toothed gear 614, which derives its motion of rotation from a toothed pinion Z915, fast on the shaft bX, which may be the usual crankshaft or any other shaft' properly timed and deriving its motion from a moving part of the loom and actuating one of said knives in one direction at one pick and the other of said knives at the same time moving in the other direction, the movement of said knives being in reverse directions at the next pick, and so on, said knives being herein designated as a pair of reversely-reciprocating shed-forming knives. The toothed wheel 1914 is fast on a shaft provided at its opposite end with a beveled gearhl, which in turn engages a beveled gear b1B on a shaft provided at its opposite end with a worm 519, which engages a worm toothed gear h2o on the shaft b21, of suitable construction, which moves the pattern surface or chain E, the latter having usual pins d, which may be set in any desired order according to the pattern to be woven. The pins d of the pattern-surface act at suitable intervals upon suitable levers cZ dx, mounted in pairs upon a suitable rod d2, one of said levers, as d', having a toe cl3 and one, CZX, having a projection d4, provided with a pocket and seat to sustain thelower end of a rod d5, provided at its upper end with a head which abuts against the notched lifting-jack, operatively joined with the upper end of the same connection with which the lowermost jack b', controlled by the finger, is joined.

The framework has two stops e and e', (see Fig. 2,) against which may act the shoulders e2 e3, placed between the inner edges of the notches and the pivotal points of the liftingjacks b and b', and when said shoulders engage said stops the connection to which said jacks are operatively secured will occupy the position shown by the connection at the left in Fig. 2 and the cam c' will occupy its elevated position, causing the harnesslever .acted upon by it to occupy a position to put its connected harness-frame in the lower plane of the shed. The stops e e' are so placed on the framework of the loom as toengage the shoulders e2 e3 of such lifting-jacks as are in their inward position, as represented by the jacks l) D, Fig. 2, these jacks being those that are not drawn outward by the outward movement of either knife, and said stops serve to positively lock such jacks intheir inward position during the formation of a shed,the said jacks being held elevated, with the shoulders c2 63 against the stops e e and above the knives, by the rods d5 or toe (Z3 or levers d/ (lx.

It will be understood that whenever a jack is actuated by one or the otherof the knives the said jack will, through the connection to which it is attached, turn an actuator to thereby raise or lower a harness-frame, and during this operation the connection turns about the pivot B of its actuator and the actuator turns about its pivot B4, so that as the connection turns about its pivot B' the said pivot is being moved out of line of the pivots B' of the other actuators, as shown by the pivot B of the connection B0 in Fig. 2. This compound movement of the connection gives to that end of it which rests against one of the stops C4 or C5 a vertically-sliding movement, such vertical movement of course being given to the attached end of the jack, the shoulder of said jack being in contact with the stop on the frame. Fig. 6 illustrates diagrammatically the two extreme positions of the connection and the resultant vertically-sliding movement of its ends, the vertical dotted line representing the position of the connection when neither of its pairs of jacks are operated on by a knife and the oblique dotted lines showing its position when one or the other of its pairs of jacks have been moved outward by a knife. The free ends of the jacks are normally sustained by the rods d5 or toes cl3, which are controlled by the levers d dx. Hence this vertical motion of that end of the jack which is attached to the connection will operate to swing the jack in a vertical plane about the point where 'ack rests on the rod d5 or toe cl3 as the said j a fulcrum. In order to prevent such swingving or tipping of the jack from disengaging the shoulder e2 e3 from the stop e or e', said stops are so placed on the framework of the loom as to be substantially in line above the rods d5 and toes d3 ot the levers d' and dx, which control said jacks as to the engagement of their shoulders e2 e3 with the stops e e, so that said stops, and consequently the shoulders on the jacks when in engagement with the said stops, are approximately at the fulcrum-point of the jacks as they swing or tip, owing to the up-and-down movement of the ends of the connections, as above described. With the shoulders and stops thus positioned it will be evident that any up-anddown movement which may be given to the ends of the connections as they are turned by the knives about the pivots B will not change the relative positions of the stops and the shoulders of those jacks which are in their inward position, as would be the case if the jack were supported by the rod d5 or toe d3 at a point between its free end and the shoulder e2 or e3, for were the jacks supported on the rods d5 or toes d3 beyond thel shoulders the tipping of these jacks, which are in their inward position, as above described, would tend to release the shoulders e2 or e3 from the stops e and e.

In weaving, certain of the harness-frames have to be brought into the upper frame of the shed in a predetermined order to weave the desired pattern, and in doing this if the pins on the pattern-surface raise the levers d and thereby allow the lifting-jack b to be IOO IZO

depressed preparatory to the outward movement of the shed-forming knife b5 then that jack would be moved with said knife and would pull the upper end of the connection B with it, and at the same time inasmuch as the lower end of said connection rested against the guide C5 as a-fulcrum the actuator B2, having the pin b constituting a centralfulcrum for said lever,will be moved in a direction to cause the arm B of said connection to be depressed and with it depress the cam C' under its control, so that the surface c thereof acting against the surface a of the harness-lever will turn said lever into the position shown by the second lever in Fig. 2, thus lifting the harness-frame under its control and putting said harness-frame into the upper plane of the shed. It will be obvious that the harness lever would be lifted in just the same way if the lifting-jack b were depressed to engage the shedding-knife h6 in its outward movement.

To return each connection B and move the actuator underl its control to move the cam cooperating with it to turn positively the harness-lever and put the harness-frame connected with it in the lower plane of the shed, I have provided depressingjacks b2 and b3, one for each lifting-jack, a lifting and a' depressing jack constituting a pair sliding in the same opening, as forf', of the usual grid, the depressing-jack having, as represented, a shoulder 2 and two projections 3 and 4, the projection 4 overlapping the upper side of the lifting-jack, while the projection 3 eX- tends across the lifting-jack at its under side, so that the upward limit of movement of each of said jacks is controlled by the other.

The shedding-knives be and U' work in opposition-z'. e., when one is moved outwardly the other is moved inwardly. Let it be supposed that the knife b'f is moving outwardly into the position,Fig. 2, it putting the harness-frames connected with the jacks caught upon it into the upper plane of the shed, and that at the same time the knife bs is moving inwardly, it being in contact with the shoulders 2 of the depressing-jacks occupying a position in the path of its movement, and carrying said jacks with it to the left, putting the upper ends of the connections B, or the small Wearing projections h thereof, (see Figs. 9, l0, and 11,and in this instance illustrated as forming part of the connections,) in contact with the outer side of the rear guidepCl, the engagement of said knife b with said depressingjacks putting the harness-frames connected with them in the opposite plane of the shed, as herein shown the lower plane, the knife during this movement occupying a position out of engagement with the jacks b, and while so out of engagement-said jacks are redistributed, and such jacks as are not put in position to be taken out by the knife be when it is again moved outwardly to the right are left with their shoulders e2 in contact with I the stops e, the jacks which are to be engaged and moved outwardly dropping and coming into position to enable their hooks to be engaged by the knife b, the harness-frames connected with the lifting-jacks actuated at such time by the knife bs being put into the upper plane of the shed, so when a hooked jack b is being moved outwardly it will be understood that the hooked jack b attached to the opposite ends of the connection will be held in its fixed position by the shoulder es thereof, it at such time meeting the stop e', and vice versa.

I have hereinbefore referred to the fact that each knife 236 57 in its outward movement inengagement with a jack b b puts the harness-lever operatively connected with said jacks in the upper plane of the shed, but this is due solely to the fact that the pin or project-ion B on the actuator, said pin supporting the connection B, is located below the fulcrum B4 for the actuator, and it will be understood that were this pin B located above the fulcrum B4 in such event the outward movement of the knives would be effective to put the harness-frames connected with the jacks and moved outwardly by the knives in the lower plane of the shed.

The rod a9 may have applied to it any desired number of harness-levers, according to the number of harness-frames it may be desired to employ to weave the particular goods under consideration, and to confine theseharness-levers, whatever may be their number, properly upon said rod a9 that their hubs g may contact properly, I have made a guideplate g', the shape of which is best shown in Fig. 13, the plate being applied to the rods a9 and b4.

While I have shown the cams for moving the harness-levers as independently mounted on the loom and interposed between the actuators and the harness-levers, yet I do not intend in all instances to limit my invention to exactly such construction, as it comprehends, broadly, a series of cams deriving their movement from said actuators and in such movement actuating the harness-levers.

The pairs of jacks at both ends of the connection work just alike, and it will be under-l stood that when a knife-say the lower oneis returning to place, it may be, a harnessframe in position to put its warp in the lower plane of the shed said harness-frame will not be so moved, provided the jack attached to the opposite end of the connection is engaged and drawn outwardly by the opposite, or, say, the upper, knife as the lower knife is moved inwardly.

Having described my invention, what I.

claim as new, and desire to secure by Letters Patent, is-

1. In a loom, double-ended harness-levers having cams at opposite sides their pivotal points and adapted to be connected with harness-frames, a series of connections supported. independently of said harness -levers, a pair of shed-forming jacks carried by each end IOO IIO

of said connections, means to engage and move said jacks alternately at desired times, and devices actuated by the movement of said connections to turn said harness-levers about their fulcra.

2. In a loom, a pivoted harness-lever, a pivoted connection operatively -joined with the harness-lever, a pair of jacks pivoted to each end of each connection, and shed-forming knives, said knives engaging one jack of a pair to move the harness-lever in one direction, and the other jack of said pair to move the harness-lever in the other direction.

3. In a loom, a pivoted harness-lever, a pivoted connection operatively joined to said harness-lever, a pair ofjacks carried by cach end of the connection and shed forming knives, each of said knives adapted to engage one jack of a pair in its outward movement and the other jack of the said pairin its backward movement.

4. In a loom, a series of double-ended harness-levers adapted to be connected at their opposite ends by suitable cording with harness-frames, each of said levers having at opposite sides its center of motion an incline, a series of connections mounted independently of said harness-levers,one connection for each lever, each of said connections having joined with it at its opposite end a pair of jacks; a pair of shed-forming knives, each knife cooperating with one pair of said jacks, means to actuate said knives each in one direction for one pick, and in the opposite direction for the next pick, and harness-lever-moving cams adapted to be moved in opposite directions through the movements of said connections actuated by the knives engaging the jacks thereof.

5. In a loom, harness-levers adapted to be connected with harness-frames, a series of pivoted actuators, a series of con nections pivoted each on its own actuator, a lifting-jack, and a depressing-jack pivotally mounted on each end of each of said connections, said lifting and depressing jacks being independent from each other, oppositely-moving knives to move said connections and actuators positively in both directions, and independent intermediate devices moved by said actuators to act upon and turn said harness-levers.

6. In a loom, a series of harness-levers adapted to be connected each with one of a series of harness-frames, a series of cams, one for each of said harness-levers, a series of connections, each provided at its upper and lower ends with a lifting-jack and a depressingjack, a pattern-surface, suitable shedforming knives to engage said toothed jacks according to the demands of the pattern-surface to move them outwardly, and a series of devices controlled as to their movements by said connections and adapted to reciprocate the cams for actuating the harness-levers, whereby whenever a knife engages a lifting-jack the harness-frame under the control of said jack will be lifted, said knife on its return stroke through the depressing-jack effecting the depression of the harness-frame under its control into the lower plane of the shed.

7. In a shedding mechanism for looms, a harness-lever, a pivoted connection for operating said harness-lever, a jack at each end of said connection, knives to move the jacks, said jacks each having a shoulder, fixed stops on the loom-frame to engage the shoulders of those jacks that are not moved outward by the knives, and means to prevent the disengagement of the shoulders and stops during the tipping or swinging of the jack due to the turning` of the connection about its pivot.

8. In a loom, a harness-lever, actuating means therefor, including a pivoted connection having at each end a jack, means to move the jacks to thereby form sheds, each jack having a shoulder and stops on the loomframe adapted to engage the shoulders when the jacks are in their inward position and supporting means for the free ends of the jacks located substantially in line with said stops but on the opposite side of the jacks therefrom whereby, when the connection is turned the shoulder of the jack will not be disengaged from the stop.

9. In a loom, a harness-lever, a connection adapted to move said harness-lever to form sheds, notched jacks attached to the opposite ends of said connection, knives to engage and move the jacks, pattern-controlled indicating means for distributing the jacks, said jacks each havinga shoulder and stops on the loomframe to coperate with the said shoulders, said stops located substantially in line with and above the indicating means, and on the opposite side of the jacks from said indicating means.

l0. In a loom, alternately-moving shedforming knives, a pivoted connection, two shed-forming jacks pivotally sustained, one at or near the opposite ends of said connection, each jack having a notch adapted to be engaged by a knife at one edge and having at its opposite edge a shoulder, two shed-closing jacks, one operatively joined with each end of said connection, a series of stops e, e' crossing the upper sides -of the said jacks, andmeans to operate said shed-forming jacks to put their shoulders in contact with said stops preparatory to the change of patternsurface, t0 redistribute said jacks to be engaged by the shed-forming knives.

1l.- In a loom, alternately moving shedforming knives, a pivoted connection, two shed-forming jacks pivotally sustained, one

at or near the opposite ends of said connection, each jack having a notch adapted to be engaged by a knife at one edge and having at its opposite edge a shoulder, two shed-closing jacks, one operatively joined with each end of said connection, a series of stops e, e crossing the upper sides of said jacks and adapted to be engaged by the shoulders of such jacks as are in their inward position and IOC IIO

means to prevent the shoulders from being disengaged from the stops when the connection is moved to form a shed.

l2. In a loom, alternately moving shedforming knives, a pivoted connection, a shedforming jack pivotally mounted at each end of said connection, each jack having on one edge a shoulder, a shed-closing jack also pivoted to each end of the connection, patterncontrolled indicating means controlling the shed-forming jacks, stops as e, e on the loomframe adapted to be engaged by the shoulders of such jacks as are in their inward position, said stops being located substantially vertically above the indicating means whereby the shoulders of the jacks are maintained in engagement with the stops during the turning of a connection in the formation of a shed.

13. In a loom, a double-ended harness-lever, a harness-frame connected therewith, a connection operatively joined with said lever, two jacks jointed to each end of said con nection, and two oppositelymoving shedforming knives, each knife in one direction of its movement engaging one of said jacks to form a shed, and in its opposite direction engaging the other of said jacks, to put the connection in a position where the jacks attached to it may be redistributed for the formation of another shed, said shed-forming knife when cooperating with the jack to put the connection in position where the jacks may be redistributed positively locking said connection in position until the redistribution of the jacks takes place.

14. In a loom, a harness-lever having a plurality of inclined faces, a reciprocating cam having a plurality of inclines cooperating with the inclined faces of the harness-lever, two knives, means to move them oppositely, two pairs of lifting and depressing jacks operatively joined with said cam, said jacks adapted to be actuated bythe knives, said cam, as it is moved, being kept in close contact with the harness-lever and made to positively turn said lever about its fulcrum in the proper direction.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HORACE WYMAN.

Witnesses:

GEO. W. GREGORY, W. W. DIXON.

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