US1838048A - Shedding mechanism - Google Patents

Description

DEC. 22', 1931. G AMBLER 1,838,048

SHEDDING MECHANISM Filed June 4, 1929 2 Sheets-Sheet l i i l l5 i /5 69 I 29 i E gt p 2/ i /5 I Patented Dec. 22, 1931 UNITE? STATES "PATENT OFFICE snoncn B. AMBLER, or LEOMINSTER, MASSACHUSETTS,

nssrcnon ro F. A. WHITNEY MASSACHUSETTS Application filed June 4,

of the loom illustrating so much of the shed" ding mechanism as is necessary for an understanding of the invention, other partsof the loom being omitted; and

Fig. 2 is a similar section with the shed open and parts being broken away.-

The mechanism herein shown, by way of example merely and without limitation thereto, is of the singlelift type and forms a close shed. Referring to Fig. 1 of the drawings, I utilize a series of heddles 5, each controlling one or more warps and herein shown as metal strips provided between their ends with'a mail or eye 7 through which passes a single warp. These heddles are shown guidedfor rectilinear vertical sliding movement in the upper and lower cross-bars 9 and .11 and may be provided with pins 13 adapted to rest on the cross-bar 9 which thus consti-' tutes a rest board. In the embodiment of the invention shown the heddles are disposed in a single line across the loom. By heddle in the ensuing claims I referto a mechanism of this kind adapted positively to position the warp or warps engaged therewith as it is itself moved and distinguish from a flexible coupling (such as that usually comprising neck cord, harness line, sleeper, mail, hanger and lingo) actuated in onejdirection by a lingo or its equivalent.

Each heddle is provided with a displaceable stop in the form of a griff-engaging hook 15 pivoted thereto at 17, the spring 19 extending between the body of the hook and the offset arm 21 on the heddle serving to draw the pin 23 on the hook against the stop 25 on the heddle, thus maintaining the hook normally at a fixed position angularly relatively to the heddle, being that shown at the rear in Fig. 1, the corresponding heddlc being broken sniznmnc MECHANISM 1929. Serial No. 368,263.

away and omitted in Fig. 2. In this position I the hooks 15 may underlie the cross-beam 27 which serves to maintain the heddles in the depressed position, the warps controlled thereby then forming the bottom line of the shed.

The hooks 15, when swung the force of springs 19 to the left in Fig. 1, as shown by the nearer'of said hooks in that figure, are adapted to engage over a vertically reciprocating griff bar 29. extending across the loom between upright rods 31 which are reciprocated, as by means of the eccentrics 38 at their lower ends. I prefer to arrange the parts insuch manner that the resulting draft shall be substantially longitudinal of the heddles. Extending between the rods 31 I preferably provide a counter griff bar 35 which overlies fixed stops in the form of pins 37 projecting from the heddles 5. When certain hooks 15 are selected by suitable pattern mechanism and swung over the griff bar 29, the eccentrics reciprocate rods 31 and the griff bar raises the selected heddles, as

shown in Fig. 2, to form the top line of the shed. The remaining heddles, not shown in said Figure, the hooks of which-remain under the beam 27, remain and are held in depresse position to form the bottom line of the shed. The rods 31 then descend and the counter griff bar 35 positively retracts the heddles which have been raised to the position of Fig. 2. The hooks of those heddles which are not to be raised in the formation 7 of the succeeding shed are free to leave the .grifi' bar 29 in the lower position of the same under the influence of their springs 19 and rockinto position under beam 27.

The reciprocation of the grilf bars is herein shown as positively effected by power under the influence of eccentrics 33, but the connection of the grid bars to their operating means might be a force-closed one. However, the griff mechanism serves in itself to actuate the heddlesin both directions and the lingoes of the ordinary jacquard are eliminated.

Herein I have shown the hooks 15 as operated by means of connecting rods or radius links 39 pivoted thereto and to blocks 11 slidaforward against ble on plungers 43 which move in a cross-piece 45 and are adapted to be reciprocated therein y suitable. pattern mechanism. The block 41 is herein shown as a short section of a channel, the flanges of which provide hearings on the plunger 43, and a suitable spring 47 is interposed between the plunger and the block So that when the plunger 43 is moved to the left in the figure, it operates through spring 47, which is stronger than spring 19, to swing the hook 15 over. This arrangement permits an easy motion and permits overthrow of the plungers 43. The plungers 43 are desirably disposed in a plane at an elevation half-way between the lower and upper positions shown in Figs. 1 and Q-respectively of the point of connection of link 39' to hook 15to minimize the thrust action of the former as it swings. However, the yielding connection through spring 47 permits the lifting motion without undue strain on the parts.

Theplungers 43 may be operated by any suitable pattern mechanism, herein shown as the reciprocating, intermittently rotating cylinder or prism 49 on the faces of which are received the linked-together bars 51 carrying the pegs 53, the whole resembling in appearance a dobby harness chain. Provision is made for inserting pegs in each bar corresponding to the various plungers. Where a peg is present it engages the end of the plunger when the cylinder is moved to the left as in Fig. 1, moving the plunger to the left and causing the corresponding hook 15 to be swung over grifi bar 29. If the peg is absent, the corresponding plunger and heddle are unaffected, as shown at the rear of Fig. 1. As the grill. bar rises, engaging the hooks, the cylinder may retreat and turn, as shown in Fig. 2, so that at the next cycle of the parts another link of the chain will come into action when the cylinder again moves to the left. The cylinder need dwell in the forward position only long enough to permit the grifi' bar 29 effectively to engage with the hooks 15 in its upward stroke. As seen in Fig. 2, the hook has a bill defining a throat into which the bar enters to interlock therewith and prevent disengagement of the hook by thestress of spring 19. It may then start to retreat and turn as theshed opens and the pick takes place. If the cylinder advances to engage the plungers before the heddles have resumed the position of Fig.1, no harm is done. Those hooks which are again to be lifted remain in position over griff bar 29 without returning to normal position. Those hooks controlling warps which are to be transferred to the bottom of the shed are positively drawn down by counter griif bar 35 until they snap back under beam 27 The forward edges of the hooks and the lower edge or griff bar 29 are preferably rounded off as shown in the figures so that hooks controlling warps which are to be transferred from the bottom to the top of the shed, if freed from beam 27 by the forward stroke of the pattern cylinder before grifl bar 29 reaches its lowermost position of Fig. 1, may ride over the bar until free to swing in above it, this being effected without undue strain because of the yieldable connection of the hooks with the plungers through springs 47. Thus no dwell of the grill in stationary lower center position is required. I

I am aware that the invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and I therefore desire the present embodiment to be considered in all respects as 4 illustrative and not restrictive; reference being had to the appended claims rather than to the foregoing description to indicate the scope of the invention.

Claims:

1. A shedding mechanism tic-ally reciprocable heddles, hooks pivoted thereto, a beam overlying the hooks, pattern mechanism for rocking selected hooks from beneath the beam a griif bar for engaging the hooks to elevate the heddles, a counter griff bar engaging the heddles for returning the comprising versame, and means for reciprocating said bars 7 in unison.

2. In combination with a series of heddles guided for vertical movement, a vertically reciprocating frame having upper and lower grifi bars, projections from said heddles underlying the lower .bar, spring-pressed hooks pivotedto said heddles, and pattern means for swinging selected hooks against their springs over said upper bar.

3. In combination with a series of heddles guided for vertical movement, a vertically reciprocating griffbars, projections from said heddles underlying the lower bar, spring-pressed hooks pivoted to said heddles, a beam beneath which the hooks are normally disposed, and

pattern means for swinging selected hooks against their springs over said upper bar.

4. In combination with a series of heddles guided for vertical movement, a vertically reciprocating frame having upper and lower grifl' bars, projections from said. heddles underlying the lower bar, hooks pivoted to said heddles and adapted alternatively to overlie the upper griff bar or lie away therefrom, a beam beneath which those hooks not overlying the griff bar are disposed and constituting means preventing upward motion of the heddles, means tending to move the hooks to one posltlon, and pattern mechanism for moving selected hooksto the other position.

5. In a shedding mechanism a series of heddles guided for vertical sliding movement, grifl' engaging hooks movably mounted thereon, pattern mechanism for selectively positioning the hooks, and a double acting griif frame having upper and lower for raising and returning selected heddles respectively LO open and close the shed.

6. In a shedding mechanism a series or heddles guided for vertical sliding movement,

grill-engaging hooks pivoted thereto, springs normally positioning said hooks at a fixed angle, plungers having a yieldable force transmitting connection to said hooks, and pattern mechanism cooperating with said plungers to swing selected hooks against their springs and a griif for lifting the so shifted hooks.

7. In a shedding mechanism a series of heddles guided for vertical sliding movement grid-engaging hooks pivoted thereto, springs normally positioning said hooks at a fixed angle, radius links connected to said hooks, plungers secured to said links and pattern mechanism cooperating with. said plungers to swing selected hooks against their springs and a grid for lifting the so shifted hooks, said plunger-s operating in a plane substantially midway between the raised and lowered positions of the point of connection of said links to said hooks.

8. A shedding mechanism comprising a series of heddles, hooks pivoted thereto, springs between said hooks and heddles normally to swing the former to a fixed position, a beam beneath which said hooks are retracted by the springs at the down position of the latter, a reciprocating grilf for interlocking the hooks to raise the same, means acting briefly during a portion of the cycle of the grit? wnile it is adjacent its lowermost position for shifting selected hooks into the path of the griff, and a counter for retracting the heddles.

9. A shedding mechanism comprising a series of heddles, hooks pivoted thereto, springs between said hooks and heddles normally to swing the former to a fixed position, areciprocatinggriif for interlockingthehooks to raise the same, and means a ting briefly during a portion of the cycle of the grill while it is adjacent its lower position and through a yieldable connection for shifting selected hooks into the path of the grid, the upper portions of said hooks and the lower portion of the grifi' being shaped to permit the descending grili to displace and pass shifted hooks.

10. A shedding mechanism comprising a series of heddles, hooks pivoted thereto, springs between said hooks and heedles normally to swing the former to a fixed position, a reciprocating griff for interlockng the hooks to raise the same, means acting briefly during a portion of the cycle of the grill while it is adjacent its lower position and through a yieldable connection for shifting selected hooks into the path of the grid, the upper portions of said hooks and the lower portion of the griff being shaped to permit the descending griff to displace and pass shifted hooks, and a counter grifi' acting on the heddle for retracting the same.

11. In a shedding mechanism a set of heddles having fixed and displaceable stops, reciprocating grifi" means operating between said stops to engage in its respective phases alternately the fixed stop and a displaced stop and adapted to interlock with the displaced stop to retain it in displaced position, and pattern means for selectively displacing said stops.

12. In a shedding mechanism a set of heddles having fixed and displaceable stops, reciprocating grifi' means operating between said stops and passing fromits downward to its upward phase substantially without dwell in stationary position, saidnieans engaging in its respective phases the fixed stop and a displaced stop, and adapted to interlock with the displaced stop to retain it in displaced position, and pattern means for selectively momentarily displacing said displaceable stops into the path of the griff means substantially at the lowermost position of the latter.

13. In combination with a seriesof heddle bars having hooks for engaging a grifi', a series of plungers adapted to be engaged by pattern mechanism, blocks slidable on the plungers, springs interposed between the plungers and blocks and connecting rods between said blocks and hooks.

let. in combination with a series of heddle bars, grid-engaging hooks pivoted thereto, springs normally supporting said hooks at a fixed angle, and means for swinging the hooks against said springs comprising a series of plungers adapted to be engaged by pattern mechanism, blocks slidable onthe plungers, springs interposed between the plungers and blocks and connecting rods between said blocks and hooks.

In a shedding mechanism, in combination with a set of heddles, a griff reciprocating without substantial dwell at its lower limit of movement, grill-engaging means carried by the heddles, pattern mechanism momentarily acting on said means substantially at the lower position of the grifl to cause the grifi' to interlock selected heddles in its upward movement positively to reciprocate the same therewith substantially throughout its succeeding cycle.

16. In a shedding mechanism a vertically guided rigid member for connection to a warp, a grid-engaging hook pivoted there to, a spring interposed between said member and the hook, a connecting rod pivoted to the hook, and a member adapted to be displaced by a pattern mechanism having a yielding connection to said rod for transmitting force thereto.

17. in a shedding mechanism vertically guided rigid members for connection to the warps, grid-engaging hooks pivoted thereto,

springs interposed between the members and hooks, selective means for shifting said hooks against the force of the springs, and a projection'on said members underlying a counter grift.

18. In a shedding mechanism a vibrating griff, individual heddles for controlling warps, said heddles having provision for connecting them to the grift for positive movement thereby in both directions, means for selecting certain of said heddles for such connection and means interlocking the heddles not so selected to prevent them from moving.

' 19. In a shedding mechanism in combination with a reciprocating grin, heddles for controlling warps, said heddles being nor-= mally at rest to define one side of the open shed, and means for selectively causing engagement of certain of said heddles with the grifi for positive movement thereby to the other side of the shed and back to normal position.

20. In a jacquard mechanism of the close shed type in combination with means for moving selected heddles to form the shed, warp-controllin heddles normally positively held against movement in a position de fining one side of the shed and pattern means for positioning selected heddles relatively to the grifi" to be positively moved thereby to the other side of the shed.

21. In a shedding mechanism in combination with a vibrating griil, a plurality ofheddles, means for selectively connecting certain heddles to the griii to be actuated thereby positively in both directions, said heddles when not so connected providing means for positively holding the corresponding warps at the lower side of the shed.

22. In ashedding mechanism in combination with a plurality of warp-controlling heddles, stationary means to prevent movement of the heddles from closed shed position and selective movable means for releasing heddles from said stationary means and moving them to open shed position.

23. In a shedding mechanism a heddle controlling one or more warps, a vibrating grin means carried by the heddle for connection with the grid whereby the heddle is positively actuated in both directions by the griii', and a selective means briefly controlling said heddle-carried means for initially effecting its connection with the griii;

24. In a shedding mechanism a heddle having an eye for a warp, a stop with which the heddle is normally in contact toprevent its shedding movement and selective means to move the heddle out from engagement with said stop to allow shedding movement thereof.

In testimony whereof, I have signed my name to this specification.

GEORGE B. AMBLEii.

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