US1587915A - Check for axminster-loom-needle motion - Google Patents

Description

June 8 i926.

w. E. MCCLEARY CHECK FOR AXMINSTER LOOM NEEDLE MOTION Filed Deo. 1, 1925 NN @N Patented June 8, 1926.

UNITED STATES PATENT OFFICE.

WILLIAM E. MCCLEARY, OF WORCESTER, MASSACHUSETTS, ASSIGNOR T CROMPTON & KNOWLES LOOM WORKS, 0F WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

CHECK FOR AXMINSTER-LOOM-NEEDLE MOTION.

Application led December 1, 1925. Serial No. 72,583.

This invention relates to needle motions for Axminster looms and it is the general object of the invention to control the inner or weft laying stroke of the needle to the end that the needle may be accurately positioned with respect to the selvage shuttle located at the opposite end of the loom.

Axminster looms of the wide type usually employ a cotton cable or rope to move the needle into and-out of the shed of the loom but it is found that this rope is subject to undesirable stretching which results in inaccurate positioning of the needle. Various substitutes for the cotton cable have been used from time to time' but none have proved satisfactory. The needle is moved into the shed by one portion of the cable and is withdrawn from the shed by the other portion so that both ends of the cable Stretch. rIhe bottom of the advancing end of the needle is formed with a recess through which the selvage shuttle passes to interloop the filling of the needle and the selvage warp thread of the shuttle and this recess must lie in the path of the shuttle. Due to stretching of the withdrawing portion of the cable the needle is found to move beyond the proper position for registry with the shuttle, and it is a further object of my invention to prevent this objectionable excess movement of the needle beyond the selvage shuttle by supplying a flexible relatively inelastic member to follow the needle carrier and position the needle properly.

The motion of the needle is derived from a crank so that the needle is moving slower at the end of its stroke than it is at the middle portion of its movement and it is found where slackness has developed in the withdrawing portion of the cable that the needle will lead the inserting portion of the cable and it is a still further object of my invention to prevent improper movement of the needle by controlling the same through a flexible relatively inelastic member which moves at substantially the same rate of speed as the inserting portion of the cable. e f With these and other objects in View which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings wherein I have shown a convenient embodiment of my invention,

Fig. 1 is a rear eleva-tion of the needle motion of a loom having my invention applied thereto,

Figs.` 2, 3, and 4 are vertical sections on lines 2-2, 3-3, and 4 4, respectively, of Fig.- 1,

Fig. 5 is an enlarged rear elevation of the needle carrier showing my auxiliary relatively inelastic flexible member attached thereto talzen in the direction of arrow 5, Fig. 3,

Fig. 6 is an enlarged fragmentary section through the drum showing the method of attaching the auxiliary flexible'member thereto,

Fig. 7 is a front elevation of the drum taken in the direction of arrow 7, Fig. 2, and

Fig. 8 is a detail section on line 8+8 of Fig. 1.

Referring to the drawings it will be seen that I have provided a loom frame 10 from which extends laterally a needle frame 11 having supported thereon a needle rail 12 provided with a groove 13 in which moves a shoe 14. Said shoe is formed as part of a needle carrier 15 to which is secured the outer end of a needle 16 and said carrier has a cap 17 by means of which a cable 18 is clamped to the carrier. The needle rail has pivotally mounted thereon outer and inner sheaves 19 and 20, respectively, around which the cable extends and the ends of said cable are secured to a cable drum 21 shown in Figs. 3 and 7. As shown in Fig. 3 said drum is formed with flanges 22 and Q3 defining an area for the cable and said drum is further provided with a pair of openings 24C and 25, respectively, through which the ends of the cable extend. The ends as shown in Fig. 7 are held tightly in place by means of clamps 26 held in position by bolts 27.

The drum is keyed to a shaft 28 to which is secured a pinion 29 meshing with a segment 30 pivoted as'at 31. A connector 32 is attached to the segment as at. 33 and has l (Jil give the needle a yarn inserting movement and to withdraw the needle, and an auX- iliary flexible device relatively inelastic and operatively connected to the needle to restrain undue advance movement of the needle throughout the whole yarn inserting movement of the needle.

5. In aneedle motion for Axminster looms, a needle having yarn inserting and withdrawing movements, a flexible cable having a portion operative to give the needle a yarn inserting movement and having another portion operative to withdraw the needle, a flexible relatively inelastic member effective throughout the yarn inserting motion of the needle to restrain undue forward movement of the latter which might be permitted by slaclrness of the needle withdrawing portion of the cable, and means to take up slackness of the needle withdrawing portion of the cable, the member being effective to check the motion of the needle irrespective of the amount of slack taken up l by said means.

6. In a needle motion for Axminster looms, a rotatable member, a needle, flexible connections between the member and the needle to give the latter a yarn inserting and withdrawing movement, and a iiexible relatively inelastic element operatively congest-ed to the needle and the rotatable mem- 7 In a needle motion for Axininster looms, a needle having yarn inserting and withdrawing movements, and a pair of flexible members operatively connected to the needle, one of said members being subject to stretching during normal use and the other of said members being relatively inelastic and tending to resist undue movement of' the needle rendered possible by slackness or stretching of the first member.

8. In a needle motion for Axminster looms, a needle, a flexible member connected to the needle and having a portion to give said needle a yarn inserting movement and having another portion to give said needle a withdrawing movement, a relatively inelastic flexible member operatively connected to the needle, and means to wind up and unwind said member, said means unwinding the relatively inelastic member at substantially the same rate of speed as the yarn inserting portion of the first named member is wound up.

In testimony whereof I have hereunto aiXed my signature.

WILLIAM E. MCCLEARY.

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