US2762399A

US2762399A - Multiple box looms

Info

Publication number: US2762399A
Application number: US362318A
Authority: US
Inventors: Moseley John Frederick; Mersey Heaton; Thomas Iorwerth Hefin; Vincent John Joseph
Original assignee: British Cotton Industry Research Association
Current assignee: British Cotton Industry Research Association
Priority date: 1952-06-19
Filing date: 1953-06-17
Publication date: 1956-09-11
Anticipated expiration: 1973-09-11

Description

Sept. 11, 1956 J. F. MOSELEY ET AL 2,762399 MULTIPLE BOX I..OOMS

Filed June 17, 1953 INVENTDRS Sept. 11, 1956 J. F. MOSELEY ETAL 2,762,399

MULTIPLE BOX LOOMS Filed June 17, 1955 6 Sheets-Sheet 3 Sep. 1 1

Filed June 17, 1953 J. F. MOSELEY L MULTIPLE BOX LOOMS 6 Sheets-Sheet 4 P 5 J. F. MOSELEY ETAL MULTIPLE BOX LOOMS 6 Sheets-Sheet 5 Filed June 17, 1955 Sept. 11, 1956 J. F. MOSELEY ETAL 2,762,399

MULTIPLE BOX LOOMS Filed June 17, 1953 6Sheets-Sheet 6 the head end i, is provided with an insert h of rubber or other suitable material, having its face slightly set back to avoid possibility of the threads being stopped or buildmg up at the edge. Alternatively, the end of the gripper may be rubber faced. In this example, as in the case of Figs. 1 and 2, the suction tension of the trails before cutting must be Within reasonable limits and this is adjustable by means of a collar h adjustable relative to en aperture h The gripping lever is appropriately connected to the check strap j by a yieldable spring k and oord m en as to be moved to the open position when a shuttle enters the box at the opposite side of the loom and pulls the check strap When the shuttle leaves thesaid box at the opposite side of the loom the check strap moves sufficiently to allow the lever to close off the suction under the action of the spring attached to the lever. This spring is adjustable by means of the collar 5 to vary as may be necessary, the pressure exerted on the yarn z1jpped between the grpping lever and the wall of the As shown in Fig. 4 a weft trail cutter is secured by its body 11 to the outer face of the loom temple b, as shown in Figs. 8 and 9 in the body 11 is slidably mounted a bar in the end of which is secured a cross sleeve 0 at the selvedge end of which is fixed the stationary part p of a rotary cutter. The rotary part p of the cutter is carried by a spindle p slidably and rotatably mounted in the sleeve. At the other end of the sleeve is a gear pinion p secured by a collar p and pin 12 a spring p on the sleeve serving to maintain the rotary part p eifectively urged into facial contact with the stationary part. On the lower part of the outer face of the body n is fixed a cam plate n having a cam hole n Above such cam plate, the body 11 is slotted and through such slot projects a boss 0 on the bar 0 in which is fixed a headed spindle 0 carrying a gear segment 0 complernentary to the pinion 11 In the segment 0 is a pin 0 complementary to the cam hole 12". The outer end of the bar 0 is bifurcated at 0 to form coupling means for a link s described later with reference to Figs. and 11.

In operation, the bar 0 is adapted to be reciprocated by carn means shown in Figs. 10 and 11 its normal position being as shown in Figs. 8 and 9 with the pin 0 at the right hand lower end of the cam hole. marked with a 4 to indicate that it is in the fourth position of the cycle of movement. When the rod is moved The pin is the sley returns for the beat to the left of Figs. 8 and 9 it carries the cutter rear wardly to follow up the shuttle race as the sley moves rearwardly. By the time the workinz shuttle has left the circular box, any weft trails stretching from the selvedge of the suction box will be located in the working opening of the cutter formed bv the fixed and rotatable parts thereof and the pin 0 will be in the clotted position 1 at the left hand lower end of the cam hole. Such weft trail will be in tension dus jointly to the immediately preceding movement of the circular box and the backward movement of the sley so that the risk of lashing-in immediately after shuttle change, is negligible. The risk increases enormously at the next nick from the circular box because, if there has been nofurther movement of the circular box to take up weft trail slack, the working shuttle, or its weft is liable to catch this slack weft trail causing lashing-in. With the present invention the weft trail is uit immediately after each shuttle change. Further movement of the bar 0 to the left causes the quadrant to be tumed. the pin rising at the same time to the dotted postion 2 in the cam hole. R0- tation of the quadrant by its engagement with the gear pinion rotates the cutter part IJ to effect se"erance of any weft trails in the cutter. As by that time the working shuttle will have drawn any slack of its weft into the warp shed so that it cannot be severed by the cutter. The cutter is wthdrawn l:orwardly by the bar 0 before 4 up so that it is not in the way of the reed.

In Figs. 10 and 11 are shown diagrammatically the essential parts of the loom relative to the weft trail cutter of Figs. 8 and 9 and its operation. The sley carrying the shuttle raceboard a is reciprocable in known manner. Attached to the side of the loom adiacent the bottom shaft q is a lever r in engagement with a cam q on the bottom shaft the end of such lever r is connected by cable r to an actuating assembly mounted at the front of the loom and comprising a bracket s carrying a guide pulley s for the table r andalso carrying a spindle to the lower and upperends of which are secured arms 3 and s'* the latter being connected by by link s to the bar 0 at 0. The cable 1- is attached to the arm s which also has a return spring s secured to it and to the front of the loom. The cam q is proportioned and timed to move the cutter by its bar a as above explained relativc to the movernent of the sley, a spring r serving to keep the lever r engaged with the cam.

In operation at any instant before cutting, the shuttle trails from the selvedge will normally be lying across the suction aperture and immediately after the weft trail is cut near the selveclge of the cloth this trail extending from the eye of the shuttle is sucked down the aperture the next time a shuttle arrives in the opposite box because the check strap i will be moved by any shuttle to move the gripper head 1 and open the suction passage.

Whenever the gripper is closed all shuttle trails in the exit tube will be held so that the shuttle having its trail so held can correctly lay the weft at its next piek. The weft is left between the orifice and the selvedge and a few picks later will be severed, part being sucked down the orifice while part remains as a fringe at 1 as shown in the drawings. Any slack occurring in a trail until cut due to movement of the sley and box will of course be taken up pneumatically. Obviously the gripper is released and the suction applied each time there might be a shuttle weft trail to be dsposed of, that is each time the working shuttle reaches the opposite shuttle box.

The sequence of operation is therefore:

1. Cutting at selvedge;

2. Suction acts to remove trail;

3. Securing or gripping the trail;

4. Pickingby the shuttle having its trail secured or Preferab1Y the raceboard between the selvedge and the suction box is smoothand polished to allow free movefrom slipping between the chamber and the box flap.

Further suction means may be provided at the selvedge to draw the short ends away from the shed and avoid their being dragged in.

Obviously, when using suction without cutting, the most convenient position for the suction device is near the selvedge where there is the least lateral movernent of the wefts with the change of position of the box.

What we claim is:

1. In a. multiple-box loom, in combination, werp holding means for holding warps in a position in which a fabric is formed with a selvedge thereof located in a predetermined plane defined by said warp holding means; a multiple shuttle box located spaced trom said predetermined plane; a plurality of shuttles arranged in said multiple shuttle box, each of said shuttles adapted to hold a weft, said shuttles being operated in a predetermined sequence so that at least one of said shuttles remains inactive in said multiple shuttle box while at least one other of said shuttles passes out of said shuttle box during a weaving oper'ation; and suction means located in termediate said multiple shuttle box and said predetermined plane and adapted to attract by suction wefts held by said shuttles with such force as to hold the weft of Saidatleast one inactive shuttle tensioned butto release the weft of sad atleast one other shuttle during aweaving operation.

2. In amultplebox 100111, in coiibinaton- Wtp holding means forholding warpsina-pos itioninwhich a fabric is formed with a selvedge thereof located in a predeterminedp'lane defined by sad warp hlding means; a multiple shuttle box located sp'ztoed =from sad predetermined plane and having an entranoe.opening; a;plurality of shuttles arrangedin sad multiple shuttle box, each of sad shuttles adapted to hold a weft, sad shuttles being operated in a predetermined sequence so that at least one of sad shuttles remains inactive in sad multiple shuttle box with the thread associated therewith passing through sad entrance opening while at least one other of sad shuttles passes through sad entrance opening out of sad shuttle box during a weaving operation; and suction means located intermediate sad entrance Opening of sad multiple shuttle box and sad predetermined plane and adapted to attract by suction wefts held by sad shuttles with such force as to hold the weft of sad at least one inactive shuttle tensioned but to release the weft of sad at least one other shuttle during a weaving operation.

3. In a multiple-box loom, in combination, warp holding means for holding warps in a position in which a fabnc is formed with a selvedge thereof located in a pre determined plane defined by sad warp holding means; a multiple shuttle box located spaced from sad predetermined plane and having an entrance opening; a plurality of shuttles arranged in sad multiple shuttle box, each of sad shuttles adapted to hold a weft, sad shuttles beug operated in a predetermined sequence so that at least one of sad shuttles remains inactive in sad multiple shuttle box with the thread associated therewith passing through sad entrance opening while at least one ether of sad shuttles passes through sad entrance opening out of sad shuttle box during a weaving operation; suction means located adjacent sad entrance opening of sad multiple shuttle box and sad predetermined plane and adapted to attract by suction wefts held by sad shuttles with such force as to hold the weft of sad at least one inactive shuttle tensioned during a weaving operation; and grip ping means for holding the weft associated with sad at least one shuttle.

4. In a multiple-box loom, in combination, warp holding means for holding warps in a position in which a fabric is formed with a selvedge thereof located in a predetermined plane defined by sad warp holding means; a multiple shuttle box located spaced trom sad predetermined plane and having an entrance opening; a plurality of shuttles arranged in sad multiple shuttle box, each of sad shuttles adapted to hold a weft, sad shuttles being operated in a predetermined sequence so that at least one of sad shuttles remains inactive in sad multiple shuttle box with the thread associated therewith passing through sad entrance opening while at least one other of sad shuttles passes through sad entrance opening out of sad shuttle box during a weaving operation; suction means located adjacent sad entrance opening of sad multiple shuttle box in sad predetermined plane and adapted to attract by suction wefts held by sad shuttles with such force as to hold the weft of sad at least one inactive shuttle tensioned during a weaving operation; and gripping means fixedly connected to sad suction means for holding the weft associated with sad at least one shuttle.

5. In a multiple-box loom, in combination, warp holding means for holding warps in a position in which a fabric is formed with a selvedge thereof located in a predetermined plane defined by sad warp holding means; a multiple shuttle box located spaced from sad predetermined plane and having an entrance opening; a plurality of shuttles arranged in sad multiple shuttle box, each of sh uttl eslacl'apted to hold a weft, sad shuttlesbeing operatedin a predetermined-sequence so that at least of saidshuttles passesthrough sad entrance opening out of sad Shuttle boxduring aweaving opration; suction me s laftd .adjacent.said entrance opening of sad mult ple s"lttle box and sad pidetermined plane and dpted t'o attr'ct bysu'etii weftsheld by sad sh1t'tls with such force as to hold the weft of sad at least one inactive shuttle tensioned during a weaving operation; gripping means for holding the weft associated with sad at least one shuttle; and means for providing suction in sad suction means and for operating sad gripping means intermittently and synchronized in a predetermined sequence with each cycle of a weaving operation.

6. In a multiple-box loom, in combination, warp holding means for holding warps in a position in which a fabric is formed with a selvedge thereof located in a pre determined plane defined by sad warp holding means; a multiple shuttle box located spaced from sad predetermined plane and having an entrance opening; a plurality of shuttles arranged in sad multiple shuttle box, each of sad shuttles adapted to hold a weft, sad shuttles being operated in a predetermined sequence so that at least one of sad shuttles remains inactive in sad multiple shuttle box with the thread associated therewith passing through sad entrance opening while at least one other of sad shuttles passes through sad entrance opening out of sad shuttle box during a weaving operation; suction means located adjacent sad entrance opening of sad multiple shuttle box and sad predetermined plane and adapted to attract by suction wefts held by sad shuttles with such force as to hold the weft of sad at least one inactive shuttle tensioned during a weaving operation; cutting means for cuttng the weft from sad at least one shuttle; and gripping means for holding the weft associated with sad at least one shuttle.

7. A device according to claim 6 and including means for wthdrawing and holding clear of sad warps the cut ends left at the selvedge of the fabric.

8. In a multiple-box loom, in combination, warp holding means for holding warps in a position in which a fabric is formed with a selvedge thereof located in a predetermined plane defined by sad warp holding means; a multiple shuttle box located spaced from sad predetermined plane and having an entrance opening; a plurality of shuttles arranged in sad multiple shuttle box, each of sad shuttles adapted to hold a weft, sad shuttles being operated in a predetermined sequence so that at least one of sad shuttles remains inactive in sad multiple shuttle box with the thread associated therewith passing through sad entrance opening while at least one other of sad shuttles passes through sad entrance opening out of sad shuttle box during a weaving operation; suction means located adjacent sad entrance opening of sad multiple shuttle box and sad predetermined plane and adapted to attract by suction wefts held by sad shuttles with such force as to hold the weft of sad at least one inactive shuttle tensioned during a weaving operation; cutting means for cutting the weft from sad at least one shuttle; gripping means for holding the weft associated with sad at least one shuttle; and means for providing suction in sad suction means and for operating sad gripping means intermittently and synchronized in a predetermined sequence with each cycle of a weaving operation.

9. In a multiple box loom in combination with a plurality of shuttles which are operated and inactive in a predetermined sequence, a suction means for tensioning weft trails associated with inactive shuttles.

10. In a shuttle loom for weaving a fabric with a selvedge and having a multiple compartment box for holding a plurality of shuttles one in each compartment adapted f0r us e selectively through a c0mmon shuttle box entrance according toa predete'rmined pattem so mon entrance to the selvedge while another shuttle from 5 another compartment is being used for weaving and is passing through such common entrance, comprising in c0mbnation a suction nozzle located in the path of such weit trail between the selvedge and the said common entrance, and means connecting such nozzle to a source 10 of suction whe reby a weft trai1 from a s huttle in a wa it ing pqsition int h box andleadng from the cmmon entrance to the selvdgeis tensioned bysuch suction dgvice.

Rgfgreqce Cited in the file of ths pgtent -5 UNITED STATES PATENTS 2,637,349 Dimham May 5, 1953 FOREIGN PATENTS