US935667A - Loom-dobby. - Google Patents

Description

H. LE DOUX.

LOOM BOBBY. APPLICATION FILED o'oT. 24,1907.

935,667. Patented 0013.5, 1909.

2 SHEETS-SHEET l.

@kalba/c0004: vvoem/bof H. LE DOUX.

LOOM BOBBY. APPLICATION .FILED UT. 24,1907.

935,667. Y Patented 0cm, 1909.

2 SHE TS-SHEET 2.

UNITE@ SITES ATEN HECTOR LE DOUX, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMPTON c KNOWLES LOOM WORKS, A CORPORATION OF MASSACHUSETTS.

LOOM-BOBBY.

Specification of Letters Patent.

Patented Oct. 5, 19M).

Application filed October 24, 1907. Serial No. 398,995.

To all whom it may concern:

Be it known that I, I-Inoron Ln DOUX, a citizen of the United States, residing at lVorcester, in the county of lVorcester and State of Massachusetts, have invented certain new and useful Improvements in Loom- Dobbies, of which the following is a specification.

My invention relates to a loom dobby for operating the harnesses of a loom, and more particularly to a dobby for a loom having swivel shuttles, to obtain a figured e'ectin plain or fancy weaves, in addition to the ordinary y shuttle.

In looms of the class referred to, ordinarily termed swivel looms, there are one or more rows of swivel shuttles operated by racks at predetermined times, according to the indications of the pattern chain, to obtain a figured effect. In this class of looms, as ordinarily made, the harnesses are moved to form the shed for the swivel shuttles, and also moved to form the shed for the Hy shuttle, and the swivel shuttles are operated at one time, when the picking motion for the general fly shuttle has to be stopped, and the fly shuttle is operated at another time. For example, when the woven fabric has a series of continuous stripes made by the swivel shuttles, said shuttles are operated every other pick, and the picking motion for the fly shuttle has to be stopped every other pick, so that the amount of the fabric produced is only half as much as it would be, according to the speed of the loom, as if there were a simultaneous operation of the swivel shuttles, and of the fly shuttle.

The object of my invention is upon the `construction of a dobby of the class referred to.

In my improvements I form simultaneously a double shed, a lower and larger shed for the liy shuttle, and an upper and smaller shed for the swivel shuttles when the swivel shuttles are to be operated. The swivel shuttle rail may be attached to the hand-rail of the lay in any suitable or usual way, and when the swivel shuttles are-operated, they carry the filling through the upper shed, and the fly shuttle carriesthe filling through the lower shed, simultaneously, and thus the to improve woven fabric will be produced without losing a pick.

In my improvements, in order to obtain a double shed when desired, I provide each upper hook and each lower hook operated by the two lifter bars, with two notches, making a double hook. I also provide some of the pattern chain bars with pegs of diifercnt lengths. lVhen the pattern chain bar has no peg, the pattern indicator linger will raise a dobby hook, and there will be no movement of the harness jacks, thus leaving a certain amount of the warp threads in the lower plane of the shed, as usual, and when a short peg comes under the pattern indicater finger, the outer notch or hook on a dobby hook will be engaged by a lifter bar, and the warp threads moved to the middle position, thus forming the upper part of the shed for the fly shuttle, as well as the lower part of the shed for the swivel shuttles, and when a long peg on the pattern chain bar comes under a pattern finger, the dobby hook will drop down, and the lifter bar will engage the inner hook of the double hook, and move the warp threads up to their highest position, to form the upper part of the shed for the swivel shuttles.

In my improvements, I preferably use a mutilated gear drive, instead of a crank drive, for the dobby rocking lever of the lifter bars, to obtain a quick motion in the shed opening, and also a long dwell for the shed, to give time for the movement of the swivel shuttles.

I have shown in the drawings a detached portion vof a loom dobby with my i1nprovements combined therewith, sufficient to enable those skilled in t-he art to understand the construction and operation thereof.

Referring to the drawings F igure l is a side view of a dobby, and a portion of a loom side, with my improvements combined therewith.` Fig. 2 shows the mutilated gear drive shown in Fig. l, detached, and as a section on line 2, 2, Fig. l, looking in the direction of arrow a, same figure. Fig. 3 shows the inner part of the dobby, detached, with the jacks and hooks forming a double shed. F ig. l corresponds to Fig. 3, but shows a different position of some of the parts for 'y only, for the fly shuttle. Fig. 5 shows the position of a' double hook, when lowered through a long peg on the pattern chain. Fig. 6 shows the position of a double hook when lowered through short peg, and, Fig. 7 shows the position of a. double hook when there is no peg on the pattern chain.

In the accompanying drawings, 1 is a detached portion of a loom frame, 2 is the dobby stand, 3 are the harness levers or jacks, pivotally mounted on a transverse rod t, each jack 3 carrying a hook lever 5, pivotally mounted thereon, to the upper end of which is pivotally attached the upper hook 6, and to the lower end of which is pivotally attached the lower hook 7. Each hook 6 and 7, has on one end, on one side or edge two notches forming two hook portions 6 and 6,y and 7 and 7, respectively.

8 is the upper lifter bar, which has a reciprocating movement in a horizontal opening 2 inl the frame 2 of the dobby, and is connected at each end by a link 9 with the dobby rocking level' 10, centrally mounted on a shaft 11. The lower lifter bar 12 has a reciprocating movement in an elongated slot 2 in the frame 2, and is connected by a link 13 to the lower end of the lever 10.

111 is a pattern cylinder, carrying the pattern chain, made up of lbars 15, in this instance carrying long pegs 15, 'and short pegs 15 on the same bar, and also short pegs 15 on another bar. Extending over the pattern cylinder 14rare the pattern indicator lingers 16, some of which have straight inner ends, on which rest the upright wire 17, to raise or lower the upper hooks 6, and the others having the upturned inner ends 16, to engage and raise the lower hooks 7. The pattern chain cylinder 14 has a rotary movement communicated thereto through a worm lgear 18 meshing with and driven by a worm 19 fasten a shaft 20. The shaft 20 lcarries a bevel pinion 21, which meshes with the bevel pinion 22 on the upright shaft 23. The lower lend of the upright shaft 2B has a Ybevel pinion 241 thereon, which meshes with ay bevel pinion 25 on a driven shaft 26.

All lof the above mentioned parts, except the double hooks 6, and 7, may be of the usual and well known construction.

The lever 10 has an arm 10', and an elongated opening 10 therethrough, in which is adjustably secured the upper end of a rod 27. rlhe lower end of the rod 27 is mounted on a crank stud 27 on a gear 28 which is mounted on a stud 29 and carries a plate 30, which Ahas concaved ends to travel on an annular fiange 31 on a mutilated gear 31, to form a-dwell gear drive for the dobby rocking lever 10. rIhe mutilated gear 31 is fast on the driven shaft 26.

rIhe operation of my improvements, from the above description in connection with the drawings, will be readily understood by those skilled in the art. In the revolution of the pattern cylinder 14, if a pattern chai-n bar 15 has no peg thereon, a pattern indicator finger 16 will drop down at its weighted end,- and raise a double yhook 6, or 7 out of engagement with the lifter bars S and 12, as shown in Fig. 7 so' that there will be no movement of they harness jacks 3, leaving a certain amount of warp threads in the lower plane of the shed, as usual. IVhen a short peg 15 comes under a pattern indicator finger 16, the outer hook, of a hook 6, or 7, will be engaged by the lifter bar, as shown by broken lines in Fig. 6, and the harness jacks 3 will be operated to move the warp threadsto the middle position, thus forming the upper part of the shed for the 'iiy shuttle, as well as the lower part of the shed for the swivel shuttles. Then a long peg 15 comes under a pattern indicator finger 16, a hook 6, or 7 will move down, as shown in Fig. 5, so that the inner hook will be engaged by the lifter bar, and move the harness jacks 3 to cause the warp threads to be moved 'to the highest position, to form the upper part of the shed for the swivel shuttles. In this way, the two sheds, a lower shed for the fly shuttle, and an upper shed for the swivel shuttles, are formed simultaneously when desired, and both the swivel shuttles and the fly shuttle will be operated simultaneously, and there is no stopping of the picking motion. By means of the mutilated gear drive for the dobby operating lever 10, I obtain a quick motion in the shed opening, and also obtain a long dwell for the shed, to give time for the passage of the shuttles.

It will be understood that the details of construction of my improvements may be varied if desired.

Having thus described my invention, what I claim as new and desire to secure by Let- -ters Patent is 1. In a loom dobby, a pattern chain, pattern indicator fingers, connectionsbetween said indicator fingers and the hooks operated by the lifter bars, and said hooks, having two notches 'thereon forming a double hook for cooperation with a single lifter bar, the hook levers pivotally mounted on the harness jaeks, and said harness jacks, and lifter bars, and means for operating said lifter bars.

2. In a loom dobby, a pattern chain made up of bars having pegs thereon of two different lengths, pattern indicator fingers, connections between said indicator fingers and the hooks operated by the lifter bars, and said hooks, having two notches thereon forming a double hook for eoperation with a single lifter-bar, the hook levers pivotally mutilated gear, meshing with a gear, and lo said gear, carrying a dwell plate, and a crank pin, and connections from said crank pin to said operating lever.

H. LE DOUX.

Witnesses:

JOHN B. SYME, JOHN C. DEWEY.

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