US2140893A - Automatic loom - Google Patents

Description

Dec. 20, 1938. J. c. BROOKS Aurom'rxp LO0M Filed June\2, 1937 s sneet-shut 1 IN VE N TOR JOHN C. 5200/6 BY. ATTORNEY.

Dec. 20, 1938.

J. c. BROOKS AUTOMATIC LOOK? Filed June 2, 19:57

3 Sheets-Sheet 2 INVENTOR JOHN C. BROOKS FMMW ATTORNEK Dec. 20, 1938. J. c. BROOKS 2,140,393

AUTOMATIC LOOM Filed June 2, 1937 3 Sheets-Sheet 3 FIG. .5

INVENTOQ FIG.4

JOHN C. BROOKS ATTORNEY.

Patenbd Dec. 20, 1938 Z,l40,893 I AUTOMATIC noon. John 0. Brooks, Paterson, N'.1J., assignorto rporati ollins&AikmanOo 3a., a corporation of Delaware on, Philadelphia,

Application June 2, 1937, Serial No. 145,950 I 11- Claims. (01. 189-241) This invention relates to automatic looms and has for its object to provide such looms with facilities to greatly increase their ability to produce fabrics, greatly economize in the space 5 they occupy, mechanism they involve, power they expend and general weaving costs.

More particularly, this invention has reference to multi-shed looms with automatic weft replenishing mechanism so positioned that a shuttle and box may move after the shuttle is boxed from a position out of registry into a position in registry with replenishing mechanism before the shuttle is again picked across the weaving shed. As an illustration of my invention, I have selected a loom in which replenishment is initiated by a weft fork, but it is to be understood that the invention contemplates the use of feelers and other known initiating means. In looms operating with a feeler motion to cause transfer of a fresh weft supply into the shuttle, the weft fork is used to stop the loom on-the total absence of weft as will be more fully set forth hereinafter.

The present embodiment uses a weft fork to cause the transfer of a fresh supply into the shuttle and does not act to stop the loom, such stoppage .being necessary only upon the total absence of weft supply in the supply magazine. I

An object of this invention is to provide a plurality of aligned shuttle boxes which are moved transversely relativeto each other for the purpose of facilitating bobbin replenishment.

A further object is to provide two superposed shuttle boxes, each aligned with a weaving shed position and replenishing mechanism to replenish a shuttle in a shuttle box out of registry position therewith during normal weaving.

Further objects and advantages of this invention will be manifest from the detailed description of the attached drawings, wherein Fig. 1 is a front view of an embodiment of my invention applied to a loom.

' Fig. 2 is a sectional left-end view through line XX 01' Fig. 1.

Fig. 3 is a similar view but showing a new supplyof weft transferred into the shuttle.

Fig. 4 is a top plan view of the lower left-hand shuttle box.

Fig. 5 is a detailed right-hand end view showing a deflector for a discharged weft carrier.

Fig; 6 is a view of a picking arm and picking b Referring first more particularly to Fig. 1 of the drawings, A indicates the vertical outside loom frame to which is secured the front breast t5 beam B. Secured to the breast beam is casing shaft 9, held in bearings it, fast on lay l.

C to hold slide D carrying thev weft fork E, playing on hammer lever F, which in the well-known manner contacts with grid G. While I show only a grid on the top lay, itfis to be understood that a grid is also associated with the bottom lay. s

The foregoing parts, along with the reed H, reed cap I which is secured to sword arms J, are all usual parts of a loom.

Important features of this invention include two non-shifting shuttle boxes, one at each end of the loom lay for the top cloth and for the bottom cloth a non-shifting shuttle box at one end of the bottom lay and a transversely slidable shuttle box at the other end of the bottom lay, suitably guided and arranged to move forward to receive a full weft carrier; discharge the empty weft carrier and move backward into a normal weaving position before the shuttle held therein is again picked across the warp shed.

The lower loomlay i is somewhat of the regular construction and is provided with a regular shuttle box 2, Fig. 5, at the right-hand of the lay. At the left-hand end of the lay are horizontal grooves l.

The lower left-hand shuttlebox l is'formed as 2 a separate member bent to shape and is provided with under ribs 5 and upper ribs 6. The ribs I engage with end grooves 3. These-ribs 5 and i project rearwardly from the box I for purposes hereafter explained. This shuttle box I, which slides forward and backward as required, may be provided with a usual binder on its back walland has projecting from its lower front portion arms 1 in which engage levers 8 mounted on a Fast also on shaft 9 isan arm II which serves to cause a'predetermined movement to said shaft 9 and pull forward shuttle box 4 with its boxed shuttle. Carried in bearings I2l3, fast on loom frame A is a shaft it provided with an arm II 40 adapted to predeterminedly engage arm II on I the aforesaid shaft 9. Fast also on the shaft ll is'a lever arm it in engagement with weft fork rod D. Thus, as is well understood in the weaving art, if the weft thread fails to intercept the weft fork in its engagement with grid G, the

" hammer lever F will engage fork E and cause lay I, causing transfer arm 20 pivoted on stud ll which is fast in bracket 22, to transfer a weft bobbin 23 from its holder 24 into the shuttle containedin box 4. As the transfer arm 20 is released from its contact mechanism, it will move, by pull of the usual spring (not shown), to its upper position during which time contact member 25 will engage arm 26 of lever 21 and pull out finger 28 and push in finger 29, thus allowing bobbin 3! to drop to the bottom ofholder 24 and bobbin 30 to be held up by finger 29. A spring 32, in front end of holder 24, retains bobbin 3| until acted upon by transfer arm 20 and is delivered to its respective shuttle;

As stated before, the weft fork is used in this embodiment only to cause a transfer of a fresh weft supply and does not act to stop the loom. In looms operating with a feeler motion to cause thetransfer of a fresh supply, the weft fork is used to stop the loom on the total absence of weft between the fork and the grid. In the embodiment illustrated, the only need to stop the loom in connection with weft is upon total absence of a weft supply in the holder 24. To stop the loom in the event of absence of weft in the magazine, there is pivoted in the inner end of holder 24 a member 33 in line of contact with a lever 34, suitably pivoted and positioned to avoid contact when under influence of member 33, held outwardly by a bobbin resting in the lower end of holder 24, but in the absence of such a bobbin, the lever 34 is arranged to contact with any well-known loom stopping mechanism to stop the loom.

The shuttle box 4 is provided in its left-hand,

end portion with an opening 35, Fig. 4, to avoid frictional resistance from the picking stick 36 when the box 4 is moved outwardly to allow the shuttle therein to receive the new supply of weft. This construction allows the picking stick 36 to remain in contact with both the top and bottom pickers during the transverse movement of the lower box. Sliding the lower box forward without movement of the picker stick therewith is thereby accomplished and disengagement of the shuttle point and picker may be performed by means well known in conventional shifting-box constructions.

As may be clearly seen in Fig. 2 of the drawings, the lower end of the supply magazine 24 is forwardly of the path of normal movement of the shuttle boxes whenthey are both in picking positions. A bracket 31, fast on the back of lay l, serves to hold the end of a spring 38, having its other end fast to the extreme rear-end extensions 39 of ribs 5 and 6, and with this spring insures the return of the shuttle box 4 to its normal weaving position when released from its actuating mechanism. Fast on the front of lay I are supporting brackets 40 which serve to support the shuttle box 4 against the pressure exerted as the new weft supply is being forced into the shuttle. Thus, as the box 4 is moved forward, the ribs 5 and 6 serve to control the position of the box and with the aid of supporting brackets 40, give a strong resistance to the pressure exerted as the new supply of weft is inserted into the shuttle. The ribs'5 and 6 serve to steady the box 4 in its normal weaving position.

Secured to the sword arms J is an upper lay 50 provided in its left-hand bottom part with grooves 5| in which play the ribs 6 of box 4. On its top, at each end are formed normal shuttle boxes 52, 51, the center portion 54 of this lay 50 being cut away to provide a space 55 in which to form a warp shed and to leave a support 56 for the top shuttle 53 as it travels from box to box. In operation. the shuttles or weft carriers may be picked in opposite'directions to each other or as illustrated in Fig. 2, in the same direction. Where replenishment of the upper weft carrier is done on the side opposite themovable lower box, there may be provided under the box 51 a deflector 58, Fig. 5, operable from any convenient part of the loom, which when moving into the path of the outgoing pirn, deflects the pirn laterally so that it does not pass through the lower box. The weft replenishing means for this top shuttle 53 may be of any desired description as is known in the art, or as briefly outlined in the drawings, may be a duplication of the mechanism shown for operation with shuttle box 4 by omitting all the parts relating to moving said shuttle box To give an even throw to both shuttles when they are picked in opposite directions at the same time, the picking rollers BI, 62 on picking arm 40, Fig. 6, are located at slightly different distances from the center length of their arm to offset the different distances of the pickers 63, 64, Fig. 1, from the end of their picking stick 36. The pickers 63, 64, are of different lengths to equalize traveling distances of the weft carriers.

While I have shown and described the selected method of carrying out my invention, I do not wish to be limited thereto, but what I do claim is:

1. In a loom utilizing a pair of simultaneously active weft carriers weaving in different sheds, weft replenishing mechanism, a pair of aligned weft-carrier receiving boxes at one side of the loom, means supporting said boxes and arranged to permit one of said boxes to be moved out of alignment with the said other box and means to move said movable box out of alignment with the said other box and into registry with weft replenishing mechanism, whereby the latter may replenish the weft carrier insaid movable box without interference from said other box.

2'. In a loom in accordance with claim 1, wherein the aligned weft carrier receiving boxes are superposed during normal weaving.

3. In a loom in accordance with claim 1, wherein the aligned weft carrier receiving boxes are superposed during normal weaving and the lower box is a movable box.

4. In a loom in accordance with claim 1, including initiating means for the box moving means and the replenishing mechanism.

5. In a loom in accordance with claim 1 including retracting means to reposition the'movable box and weft carriers before the next throw of the weft carriers across the loom.

6. In a loom in accordance with claim 1, wherein the weft replenishing mechanism comprises a weft supply magazine, a bobbin support on said magazine having a replenishment registry position forwardly of the path of movement of the movable box during normal weaving.

7. In a loom utilizing a plurality of simultaneously active weft carriers weaving in different sheds, weft replenishing mechanism, a plurality of aligned weft-carrier receiving boxes at one side of the loom, means supporting said boxes and arranged to permit the said boxes to be moved out of alignment with one another and means to disalign said boxes so that a box is positioned in registry with the weft replenishing mechanism, whereby the latter may replenish a weft carrier in said last-named box without interference from another box.

8. In a loom utilizing a plurality of simultaneously active weft carriers weaving in diflerent sheds, weft replenishing mechanism, a plurality.

of superposed aligned weft-carrier receiving boxes at one side of the loom, means supporting said boxes and arranged to permit the said boxes to be moved transversely out of alignment with one another and means to disaiign said boxes so that a box is moved into registry with the weft replenishing mechanism, whereby the latter may replenish a weft carrier in said last-named box without interference from another box.

9. In a loom utilizing a pair of simultaneously active weft carriers weaving in different sheds,

weft replenishing mechanism, a pair of aligned weft-carrier receiving boxes at one side of the loom, means supporting said boxes and means to permit one of said boxes to be moved transversely relative to the other box and out of alignment therewith and means to move said movable boxtransversely relative with the said other box and out of alignment with said other box and into registry with the weft replenishing mechanism,

whereby the latter may replenish the weft carrier in said movable box without interference from said other box.

10. In a. loom utilizing a pair of simultaneously active shuttles weaving in different sheds, weft replenishing mechanism having a bobbin transi'errer portion, picking means for picking the shuttles in aligned relationship through the shed, a pair of superposed aligned shuttle boxes on the same side of the loom as the said replenishing mechanism, supporting means for-the shuttle boxes, means to disalign the shuttle boxes transversely of each other after the shuttles pass aligned position before the next operation of the picking means.

JOHN C. BROOKS.

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