US1825110A - Pile fabric loom - Google Patents

Description

3 Sheets-Sheet l J. A. COYLE P'ILE FABRIC Loom Filgd Oct. 6, 1930 Sept. 29, 1931.

INVENTOR ATTORNEY Sept. 29 1931.

FILE FABRIC LOOM Filed Oct 6' 0 3 Sheetsv 2 lli , v TORNE Sept. 29, 1931. J. A. COYLE PILE FABRIC LOOM Filed Oct. 6, 1930 3 Sheets-Sheet 5 lNl ENTOR 1 4.43 11 BY ATTORNEY Patented Sept. 29, 1931 UNITED STATES PATENT OFFICE JOSEPH A. COYLE, OF AMSTERDAM, NEW YORK, ASSIGNOR TO IBIG-ELOW-SANFORD CARPET CO., INC., OF THOMP SONVILLE, CONNECTICUT, A CORPORATION OF MASSA- CHUSETTS PILE FABRIC LOOM Application filed October 6, 1930. Serial No. 4.-86,5 25.

This invention relates. to pile fabric looms employing weft inserting needles, and pertains more particularly to Axminster looms wherein carriers are employed to present pile yarns to the weaving point in posltion to be secured to the fabric by the weft intro-v duced by a weft needle.

In pile fabric looms of this general type it is customary to operate the lay with an uneven beat so that the beat-up movement of the lay will 'be retarded during the pile yarn inserting operation. This is desirable to provide sufficient time for the yarn carrier' to insert a row of tuft forming yarns in the fabric.

The employment of an uneven beat in the operaton of the lay leads to difiiculties in the operation of the needle, since the latter must be so inserted and withdrawn that it will not interfere with the unequal timing of the lay movement This difliculty has been taken care of heretofore by operating the needle with a similar uneven beat or period, through the employment of means adapted to bring the needle to rest upon its withdrawal from the shed and start it again after a suflicient pause to conform to the uneven lay movement, but the repeated starting and stopping of the needle subjects the needle actuating mechanism to severe strains and excessive wear and prevents the loom from operating smoothly.

An important feature of the present in- Axminster loom having a lay that is operated with an uneven beat and a weft lnserting needle that is operated continuously vention therefore resides in a pile fabric or with a start and stop motion as heretofore.

Other features of the invention and novel combination of parts in addition to the above will be hereinafter described in connection with the accompanying drawings which illustrate good practical forms of the invention.

In the drawings I Fig. l is a side elevation with parts in section of the needle side of a pile fabric loom embodying the features of the present invention;

Fig. 2 is a to plan view of the shed and withdrawn'we t needle of Fig. 1;

Fig. 3 is a perspective view of the needle operating mechanism of Fig. 1;

Fig. 4 is a front elevation of a different type of needle operating mechanism embodying the features of the present invention; and i Fig. 5 is adiagrammatic view illustrating the uneven beat lay movement and the even beat needle movement.

The features of the present invention may be employed with practically any type of pile fabric loom having an uneven beat lay movement and a weft inserting needle, and

as the operation of these looms is well understood in the weaving art, only the general outline of the loom proper and a few of its operating parts have been illustrated.

Referring toFig. l the loom illustrated may have the usual side frames 1 for supporting the operating mechanism and these side frames are provided with the upwardly extendingcolumns 2 adapted to support or guide thetransporting chains?) which operate in a well-known manner to advance the tube frames 4 to a position above the weaving point.

As each tube frame is advanced by the chains 3 to its lowermost position it is engaged, in the construction shown by the transferrers 5'which serve to carry the tube frame downwardly into position to cause the pile yarns supplied thereby to be laid between the warps, so that they will be secured to the fabric by the weft threads. In the particular construction shown the auxiliary lever or levers 6 are provided for supporting the lowered tube frame inter: mediate its ends and the lever 6 as shown is operated by the cam actuated levers 7 and 8 which cooperate with cams 9 upon the main or cam shaft 10.

The loom illustrated has the usual warp beams 11 and 12 which are supported at the rear of the loom and the warp strands a pass from their respective beams about the whip rolls 13 and 14, and through the usual shedding mechanism, not shown, and as the fabric is woven it passes over the breast beam 15 and about the spike or take up roll 16 as usual.

In pile fabric looms employing yarn tube frames it is the usual practice in presenting a row of tuft forming yarns to the fabric to hold the'yarns adjacent the fabric until a binding weft thread has been inserted. Under this condition a longer period of time is required to insert a row of tuft yarns and the binding weft shot, than is required to merely insert a weft shot. It is therefore customary to operate these looms with an uneven lay movement so as to provide a short pause between beat-ups of the lay when a weft shot alone is inserted and a longer pause between beat-ups when both .pile yarns and a weft shot are inserted.

This unevenlay movement is commonly produced by operating the lay 17 which is carried by the lay swords 18 through cam mechanism; The loom illustrated is constructed to laythree weft shots for each row of pile yarns. The lay operating cam 19 mounted upon the main shaft 10 istherefore shown as having three cam projections 20 adapted to impart a beat-up movement to the roller 21 mounted upon the pivoted lever 22. The upper end of the lever 22 is operatively connected by a link 23 to an arm 24 which extends downwardly from the rocker shaft 25.

The cam projections 20 are unevenly spaced about the axis of the shaft 10 so as to impart the desired uneven beats to the lay, and since in the present case the lay heats up three times for one complete rotation of the main shaft, the projections 20 are so positioned that the angle between one pair of projections is slightly over 120 degrees while the angle between the other projections is slightly less than 120 degrees.

In the construction'illustrated in Fig. 5

of the drawings an angle of 130 degrees is provided between two of the cam projections 20 and an angle of 115 degrees is provided bet-weenthe remaining cam projections 20. It will'be apparent, however, i

that the angle between these three cam projections may be different from that just mentioned.

The loom construction so far described forms no essential part of the present invention buthas been illustrated and briefly set forth to make clear the novel operation of the weft inserting needle with an even beat or period as will now be described.

The loom shown in Fig. 1 of the drawing has associated therewith the needle operating mechanism best shown in Fig. 3.

This mechanism is supported by the frame 26 disposed at the right side of the loom in position to be secured to the main frame 1 and the frame 26 is shown as having the upwardly extending brackets 27 adapted to support the needle guiding rail 28, which is mounted opposite the open shed, as will be apparent from Fig. 3. This rail 28 is provided with the usual. needle supporting brackets or guides 29 adapted to slidably support the weft inserting needle 30. The means commonly employed for moving the needle 30 into and out of the shed comprises a rope or cable 31, which is clamped or otherwise secured to a laterally extending projection 32 carried by the needle 30 and the cable 31 is operatively supported by the desired number of grooved sheaves 33. The operating movement is imparted to the needle by attaching the opposite ends of the rope or cable to a drum or scroll, a drum 34 being employed to this end in the construction shown in Fig. 3, whereas a scroll is employed for this purpose in the modified construction of Fig. 4. In either case the ends of the rope or cable are secured to the drum or scroll so that rotation of the same will serve to wind up one end portion of the cable and unwind the other end portion thereof.

Since the lay of the present loom is operated with an uneven beat it is necessary to so operatethe weft needle that it will not interfere With the unequal timing of the lay movement. This has been commonly accomplished heretofore by the employment of a mutilated gear adapted to permit the needle to come to rest for a sufficient period each time it is withdrawn from the lay to accommodate the uneven lay movement, but the frequent starting and stopping of the needle is objectionable, and the present invention contemplates means whereby a continuous travel may be imparted to the needle throughout the operation of the loom while at the same time the passage of the needle through the shed does not interfere with the uneven lay movement. This desired needle operation is secured in accordance with the present invention by imparting a pronounced over-travel to the needle upon withdrawing the same from the shed, so that the needle is caused to travel at one side of the shed during the unequally timed movement of the -lay. The means illustrated in Figs. 1 and 3 of the drawings for large bevel gear 35 which is secured to an extension upon the main shaft 10 and this operating theneedle comprises a relatively is supported by the shaft 41 for rocking movement. The gear segment 40 operates a small gear 42 secured to the shaft 43 upon which the drum 34, above mentioned, is rigidly mounted. The arrangement is such that the needle 30 is operated by the mechanism just described with a variable speed movement, but is moved continuously and not with an intermittent movement as has been customary heretofore in looms of the type to which the present invention relates.

The cable operating mechanism just described is so constructed that it will impart a pronounced over-travel to the needle 30, as will be apparent from Fig. 2 of the drawings, while the needle is operated with an even beat or period. When a short dwell occurs between the beat-up movements of the lay the needle 30 may be advanced by its operating mechanism to the position in which it is shown in dotted lines of Fig. 2

.as the shed opens, whereas when a longer dwell occurs between the beat-up movements of the lay the needle may occupy the full line position of Fig. 2 as the shed opens.

It will be apparent from the foregoing that the needle is operated wit beat or period so that itcompletes one cycle of movement for each 120 degree rotation of the main shaft 10, and that a pile row and one shot of weft are inserted while the main shaft is rotated through an angle of 130 degrees, but that the next two cycles of lay beat-up movement will occur during i the rotation of the main shaft through successiveiangles of 115 degrees, as will be apparent from Fig. 5. As a result of this construction a smooth continuously oper- 'ating movement is imparted to the needle without conflicting with the uneven beat imparted to the lay, and as a result a. much 6 smoother and more quiet needle operation ployed heretofore.

is secured than in the constructions em The Weft thread 6 is shown in the construction of Fig. 3 as supplied from the packages 44 and as the thread is drawn from .one 'of these packages it passes about-the desired number of guides 45 to the opening at the forward end of the needle as is usual, and the slack that occurs inthe weft thread I) may be taken up by the thread tensioning lever 46.

In the modified construction shown in Fig. 4 of the drawing the needle operating mechanism is supported by a frame 47 and the needle 30 is supported by the needle guide rail 28 similar to the construction an QVBI] i shown in Fig. 3', so that the needle may be reciprocated by the rope or cable 31, but'in this modified construction of Fig. 4 one end of the cable 31 is secured to a scroll 48 while the other end of the cable is secured to the adjacent scroll 49. The needle operating shaft 37 is driven in the construction of Fig. 4 from the main shaft 10 through the cooperating bevel gears 35 and 36, the same as in Fig. 3, but in this modified construction the shaft 37 is provided with the eccentric 50. This eccentric rotates in the eccentric strap 51 and this strap is opera tively connected by the rod 52 to an arm 53, which arm is secured to the rocking shaft 54, upon which shaft is rigidly mounted the segmental gear 55. This segmental gear through the train of gears 56, 57 and58 drives the scroll supporting shaft 59 to impart the desired operating movement to the scrolls 48 and 49. The main shaft 10 in the construction shown is provided with a large driving gear 60, which may be driven from an electric motor or other source of power, not shown.

NVhile in the loom construction illustrated means are provided for successively presenting the tube frames to the fabric being woven, the features of the present invention are also applicable to looms employing grippers or other forms of carriers for presenting the pile yarns to the fabric. I

What'is claimed is 1. Ina pile fabric loom, in combination, a weft inserting needle, a carrier for presenting pile yarns to. the weaving point,.a lay, means for operating the lay with an uneven beat to delay its, beat-up movement while the carrier is presenting the pile yarns to the fabric, and means for operating the weft inserting needle with an even beat or period'that does not vary with the uneven beat of the lay and adapted to impart a ing a weft inserting needle and carrier for presenting pile yarns to the fabric being woven, a lay, means for operating the lav with an uneven heat so that a longer period of time is provided between beatsduring the pile presenting operation of the carrier,

and means for operating the weft inserting needle with an even beat or period that does not vary with the uneven beat of the lay and adapted to impart a pronounced overtravel 'to the needle to accommodate the difference in the operating time caused by the even beat movement of the needle and'uneven beat of the lay.

3. In a pile fabric loom, in. combination, a weft inserting needle, a carrier for presenting pile yarns to the fabric being woven, a lay, a main shaft provided with cams for imparting unevenly timed beats to the lay to facilitate the laying of the pile yarns in the fabric, and gear means for operating the Weft inserting needle continuously from said main shaft with an even beat or period that does not Vary with the uneven beat of the lay and adapted to impart a pronounced over-travel to the needle to accommodate its even beat movement to the uneven beat lay movement.

4. In a pile fabric loom, in combination, a weft inserting needle, a carrier for presenting pile yarns to the fabric being woven, a lay, means for operating the lay With unequally timed beats to facilitate the pile inserting operations, and means for operating the weft inserting needle continuously with equally timed periods between the successive needle insertions and for imparting to the needle a pronounced over travel away from the shed to facilitate the continuous operation of the needle during the unequally timed beats of the lay.

5. In a pile fabric loom, in combination, a weft inserting needle, a carrier for presenting pile yarns to the fabric being W0- ven, a lay, a main shaft provided with cam means for operating the lay with two equally timed beats and then with an increased period of time between the second and third beat to thereby facilitate the insertion of the pile yarns, weft inserting needle continuously with equally timed periods between the successive needle insertions and for imparting a suflicient over-travel dle to facilitate its continuous operation durto the withdrawn neeing the unequally timed beats of the lay.

6. In a needle loom, shed forming mechanism, means for operating the lay and shed forming mechanism, a weft inserting needle, and means for reciprocating the needle continuously without dwell and with an even beat or period and adapted to impart a pronounced overtravel to the needle to thereby delay the needle inserting movement until the shed is opened and the lay is positioned topermit needle insertion.

7. In a pile fabric loom, in combination, a lay, shed forming mechanism, means for operating the lay and shed forming mechanism, a weft inserting needle, and means for operating the needle continuously with equally timed periods between the needle ifiSeItlOIlS and adapted to impart to the neee a towards the shed to thereby delay the needle insertion-until the shed is opened and the lay is positioned to permit needle insertion. In testimony whereof, I have signed my name to this specification.

JOSEPH A. COYLE.

and means for operating the V v in combination, a lay,

pronounced overtravel away from and

Images