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19. (WO2017134642) POSITIVE SHEDDING DEVICE WITH " SHAFT-IN-SHAFT" AND DISCS ARRANGEMENT
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CLAIMS:

The embodiments of the invention in which an exclusive property or privilege is claimed in connection with articulations of this invention for its application in textiles field are specifically defined as follows:

1. It is claimed that gear drive (1) is running at half of beat up speed, a pair of conjugated cams (2) imparting desired oscillation motion to Cam rocker (3), which in turn drives Universal linkage lever (4), is driving a universal connecting rod (5), this drives another universal lever (6), which is mounted on shaft (7), a linkage (8) which imparts equal and opposite motion to shaft (9), levers (10) fitted on shaft (7 & 9) which drive the other parts described in further diagrams in a positive way through connecting links (11) and a selector mechanism (12) on top of which the selector magnet (13) is mounted, lever (14) driving motion to selector mechanism (12) which it gets from positive cam (15) fitted on a shaft running at speed equal to beat up speed in such a way that this cam operates selector mechanism at timing between 3 to 30 degrees before and after the shedding timing or motion of the frames and not during the shedding movement.

2. It is further claimed that connecting rod (16) is transferring motion from cam (14) at the top to selector (12) at the bottom, output levers (17) for shedding device which drive the heald frames, these levers are set at double the heald frame pitch, and these levers drive only half the number of frames on the machine in an alternate manner, that is, even numbered frames are driven from one side and remaining odd numbered frames are driven from other end of the machine where an identical mechanism is provided, in a manner so to say the shedding device is split in to two halves and mounted on two sides of machine as further illustrated in detail in diagram 14. Referring to diagram 2 the description is identical to the description of diagram 1 as same numbers are given to the parts as they are the same but as seen from another viewing angle.

3. It is significantly claimed as per diagram 3, as a primary embodiment of this invention a six stage shaft-in-shaft arrangement for a 12 shaft shedding device is described with innermost shaft (18) having overall diameter between 20 and 60 mm, which is longest in length and is supported by bearings mounted on two places (19) at the two ends of the shaft, further input and output element keys (20 & 21) are located in keyways cut in shaft (18) for securing drive elements for farthest heald frame on the machine and will drive either heald at place 11* or at 12* based on whether his device is fitted on left or right split device on the machine. (* place 11 and place 12 are places of frames and do not refer to the numerals marked in diagrams)

4. It is claimed In furtherance that over this shaft, is a hollow shaft (22) slides over shaft (18) and serially there are 4 more sequentially bigger hollow shafts numbered (23,24,25 & 26) which form the whole six stage shaft in shaft structure, and all of these shafts numbered 22 to 26 (and so on as the case may be) have a radial thickness of between 4 to 20 mm. all shafts are free to rotate irrespective of others, a step (27) for locating pair of large bore thin bearing which fits in machine body, "Circlip" groove (28) restricts lateral movement of the shaft, peculiarly shaft (18 and 26) are the only laterally arrested shafts in the assembly, and rest of the shaft gain their position from the respective parts which fit over this assembly shown in further diagram no. 4, and driving locks (29 & 30) on both faces of all shafts (22 through 26) are for diametrically locking the elements which fit on both ends these shafts.

5. It is moreover claimed that further the driving discs (31, 33, 35, 37, 39, 41 and 43), having width from 10 to 50 mm and diameter between 75 and 200 mm and having a notch/groove of width between 5 mm to 47 mm. on their circumference, are freely oscillating without any diametrical locking arrangement with the respective shafts which they sit on, these are arranged alternately with driven discs (32, 34, 36, 38, 40 and 42), these have diameter between 100 to 300 mm and width of 10 to 50 mm., Out of the driver discs (31, 35, 39 and 43) move in one angular direction whereas driver discs (33, 37, and 41) move in opposite angular direction, so that they create opposite motion pattern on both sides of each of the driven discs group (32 to 42) above.

6. Further it is claimed in continuation of claim 5 above that this motion pattern reverses on each and every weft pick on the machine and this is essential to have a choice to lower or raise the frame on each pick of weft inserted depending upon frames current position, further a selector latch (44) which can be engaged for motion by selector mechanism by swinging over a pivot point (45) and flat springs (46) to center this lock are fitted on both sides of driven discs group (32, 34, 36, 38, 40 and 42) above. These locks are on all of the driven discs but only one of them is numbered here for simplicity of claim, further the selector latch (44) mounted in driven discs have opposite moving driver discs on both sides of it and depending on signal for selector mechanism latch will be engaged with either of the driver discs effecting change in heald position as motion of driver disc is transferred to driven disc and then to the output levers through one of the shafts of shaft in shaft arrangement.

7. It is furthermore claimed that Diagram 5 shows view of driven discs (32, 34, 36, 38, 40 and 42) only with locking shafts (50), all other parts are removed from diagram for simplicity, body of selector mechanism (47) has a face (48) which arrests latch (44) (inserted in driven discs & numbered 44 in diagram 3) in one

direction and on the other diametrically opposite end of the driven disc a projection (49) rests on shafts (50), preventing the angular motion in the other direction, thus it creates a unique position for driven disc so that it is positively locked between face (48) and shaft (50), also shown in the same diagram are shifter plates (51 and 52) and retainer plate (53), each of them having thickness between 2 to 18 mm, and are better explained in next diagrams and claims.

8. It is sequentially claimed as shown a view of shifter mechanism per diagram 6, with the cover fastening holes (54), mounting holes (55) for selector body on one side and holes (56) for mounting on other side are suitably made, link driving parts (57 & 58) are secured together on a shaft forming a unified assembly of the same, part (59) which fits right inside the body which is a slider driven by links (57) by means of one of the two small connecting links having length between 20 to 75 mm, creating oscillating motion of the same derived from cam and link arrangement (14, 15 and 16) described in diagrams 1 and 2 above, and another slider (60) which slides inside the body of slider (59) and gets an opposite linear motion from remaining connecting small link of the duo described above and driven by part (57), a pair of rectangular rods (61) securely held in slots made in slider part (59) and similarly another pair of rectangular rods (62) secured securely held in slots made in slider part (60), so as to drive shifter plates (51 and 52) respectively Plates (51, 52 and 53) are mounted on both sides of shifter body and plates on both sides are technically the mirror images of each other.

9. It is claimed that rods (61) engage with shifter plates (52) on both sides and have a relief slots for plates (51), similarly Rods (62) engage with shifter plate (51) and has relief for motion of plates (53 and 52), in such a manner that at any given time shifter plates move opposite direction with each other whereas the retainer plate moves forward of back ward depending upon drive from part (57), additionally, In case of frame shifting mode the shifter plates (51 and 52) move towards each other and retainer plate (53) moves backward and when the traverse of the frame is complete the shifter plates move backwards and retainer plate moves forward positively centering and securing the shifter latch (44) at positive lock position shown in diagram 5 above, thus working of this mechanism is positive, and in continuation, the motion of these plates (53) will be explained in further claims with the help of diagrams 8.

10. It is furthermore claimed that the complete selector assembly as shown in Front view by Diagram 7, the shifter and retainer plates (51,52 & 53) briefly described in prior diagrams and explained in detail with next two diagrams 8 and 9 further a pair of selector levers (63) used for sending a given the frame from up position to down position and another pair of selectors levers (64) used to send same frame from down position to up position, retaining springs (65) mounted within the

selector levers (63 & 64) and two geometrically surfaced slots (66 & 67) are provided to guide the shifter latch (44) through its up or down motion of respective driven disc, in an event where frame position is changed.

11. It is subsequently claimed as shown in diagram 8 by translucent view of retaining plate (53) so that its working is understood, selector body (47) in which slider part (59) moves in forward and backward oscillation ranging between 10 to 50 mm, with two fixed pins (68) in body of selector upon rectangular projections (69) so as to guide the retainer plate (53) in one direction and backward, guided in slots (71) in retainer plate, further pins (70) secured in slider (59) which lock in to oblique slots (72) made in retainer plate so that pins (70) create between 5 to 30 mm back and forth motion of retainer plate when slider (59) is moved by connecting links mounted on part (57).

12. It is further claimed about the working of retainer plate that retainer plate (53) has at least two (oblique) cam slots (72) in which pins (70) impart motion derived from part (59), these plates (53) being locked for linear motion by fixed pins the cam slot (70) drives the retainer forward or backward, additionally there are projections on front face of retainer plates, these projections a re made in such a way that the selector latch (44) is pushed towards central position by springs, away from the reliefs which they fall in during shifting, thus latch is firmly held at center after shifting is done, this is another positive action by this mechanism, further two sub parts (73 & 74) of shifting lever (63 or 63 or any selector lever on the selector body for that matter) are pivoted together at pivot points (75) so that they can swing along with the shifter plate (51) when it moved forward, retaining springs (76) are in opposite direction on two adjacent levers and there is a provision of additional cylindrical appendages (77) on the all of shifter levers.

13. It is prominently claimed that when the electro magnet activates a shifter lever (64), cylindrical appendage (77) falls between the shifter plate surface and the latch (44) and when the shifter plate moves forward, the cylindrical appendage

(77) shifts the latch (44) in one of the geometrical slots (66 and 67) in the body of selector (shown in Diagram 7), and simultaneously engages the latch in to slot

(78) in the driver disc adjacent to it, so that particular driven disc is free from positive lock position and engages itself with the driver disc and follows its motion up or down as the case may be, and when the magnets are released, shifter levers (64) swing back to their home position, further upon completion of stroke with the driver disc, the latch (44) returns to central position by means of two springs (45) (shown in diagram 5) and creates a positive lock position for the driven disc and the frame again.

14. Further it is prominently claimed that there is an availability of shifting possibility on each and every pick irrespective of frame position, as shown in Diagram 11, a position of driver and driven discs at the time of shifting, and for simplicity driven disks are shown in respectively, alternatively up and down position, shaft (7 and 9) always move in opposite direction sync with each other so when driver discs (31,35,39 & 43) are in down position and driver discs (33,37 & 41) are in up position ore vice versa, further first set of driven discs (32,36 & 40) have driver discs (33,37 & 41) to bring them up respectively, in next pick the shafts (7 and 9) will oscillate to another position and thus driver discs sets (33,37 & 41) and driver disc (31,35,39 & 43) will interchange their positions, hence on next pick driver discs (31,35 & 39) will be in a position to bring up the driven discs (32,36 & 40), hence on every pick there are driver discs available for shift any given frame from its current position to another position, thus any heald frame can change its position after EVERY pick inserted by the machine, irrespective of whether it is up or down or whether shaft (7) and (9) are swinged in or swinged out.

15. It is further claimed that selector mechanism assembly module as shown in diagram 7 has geometrical surfaces (66 & 67) guide the selector latch during frame shifting and the latch shifting is positive as explained above, frame locking is positive which is also explained above and remaining path of the latches is during changing position, for this these geometric surfaces (66 & 67) positively guide the latch during the transition path and no shifting of latch (44) is possible during this transition hence positive frame selection and handling conditions are maintained at all times, further despite this positivity of action the entire selector assembly can be taken out by dismantling only a few fasteners, as this is the hardest working and delicate part of the entire shedding device and it is, thus, arranged in a module form for segregation for maintenance.

16. It is furthermore significantly claimed that Left and Right Split arrangement of shedding device as diagrams 12 and 13 show the compact space saving feature of this positive shaft in shaft shedding device, and diagram 12 shows how it can be packed in a compact weaving machine body whereas diagram 13 shows how left and right modules of the split shedding device are installed in a typical exemplary rapier weaving machine as a fully enabled primary embodiment of this invention, with 12 shafts warp designing capacity wherein a left hand side shedding module (79) fitted in left side machine body for driving heald frames 1,3,5,7,9 & 11* and another right hand side shedding module fitted in right side body of machine driving heald frames 2,4,6,8,10 & 12*, further harnesses (81) for frames are shown without their mounting parts, and they drive heald frames (82), and this completes the split shedding mechanism arrangement wherein the output levers of each side units are at double the frame pitch which makes the output lever fitment simpler and easy to maintain. (*Note: Heald frame numbers 1 to 12 are not

placed in brackets in this description as they are not the numerals used in diagrams but they are actual heald frame numbers on weaving machine)

17. It is typically claimed as an added advantage of this invention that all the design frames (or shafts as they are called in textile terms) can be run in plain weave (that is one up and one down alternately for all frames) by just removing the selector mechanism altogether from the machine and putting another extended block with extra length of path of geometric surfaces (66 and 67) in such a manner that the latch (44) never comes out of the geometric surfaces and avoids shifting altogether, this is to be done by manually locking alternate driven discs to respective driver discs before mounting the extended block in place of entire selector assembly as plain weave just means there is no switching of frames but to follow permanent lock with a respective driver disc.

18. It is finally claimed that this 12 frame primary embodiment explained in above claims of this invention and the articulations of this invention with from 2 up to 32 frame designs can be devised and this 12 shafts primary embodiment no way limits the claim to apply this invention only for these many heald frames and the exclusive rights of invention cover all such articulations of this invention, as this is an omnipotent device and can be segregated for use on any kind of weaving machine.