US236375A - Ry barker - Google Patents

Description

(No Model.) ZSheetS-Sheet 1.

G. W. STAFFORD & H. BARKER.

Jacquard Attachment for Looms.

No. 236,375; Patented Jan. 4,1881.

' QSheets-Sheet 2. G. W. STAFFORD & H. BARKER.

- Jacquard Attachment for Looms. No. 236,375. Patented Jan. 4,1881.

(No Model.)

Ueuran STATES PATENT @rrrcn.

GEORGE WV. STAFFORD AND HENRY BARKER, OF LAWRENCE, MASS.

JACQUARD ATTACHMENT FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 236,375, dated January 4, 1881.

Application filed J une 28, 1880.

and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

This invention relates to closeshed looms provided with a Jacquard attachment; audit consists in means for depressing a portion of 2c the warp-threads below the warp-level at the same time that the warp-threads needed for the pattern are raised above the said level- .in other words, obtaining in ajacquard the result. with the series of single or independent threads that is effected by the ordinary openshed loom with aharnessframc, the purpose of the invention being to lessen the tension and friction upon the warp, reduce the cost of the engine, and enable the loom to be driven at greater speed.

The drawings accompanying this specification represent, in Figure], an isometric elevation of a shedding-engine or Jacquard attachment, while Fig. 2 is a vertical section of the 3 5 frame.

In these drawings, A represents the frame of the engine or attachment, the same being composed of upright side standards or housings, B B, united by horizontal cross-beams or bars 0 (J, 850., while the guide-plate, which directs the lower ends of the harness or drop wires and spans the area between the housings B B, is shown at D.

The horizontal needles, as they are termed,

5 of the two ranges are shown at a a, &c., and

I) b, &c., their retracting-springs at b b, &c., and their eyes at c c, 850., while the vertical hooks or drop-wires of the two ranges are shown at d d, &c., and e e, 850., respectively.

The pattern-cylinder is omitted from the drawings; but the needle-plate with which such cylinder operates is shown at E as se- (No model.)

cured to the upper front part of the housings B B. The warp-threads are shown at f f, &c., the harness or neck-cords connected to the lower ends of the books at g g, &;c., and the mails of said cords at t 2', San.

The above embrace the elementary features of a Jacquard attachment now in general use.

In carrying out our invention we employ a horizontal open rectangular frame, F, ar "a nged between-the upper parts of the housings B B, and with its end bars secured to vertical rodsj j, which slide in bearings 7c 7c in the contiguous faces of said housings, the frame being thus adapted to slide vertically upon its supports with respect to the other portions of the ma chine, and carrying upon opposite sides horizontal parallel rods or bars I l, from which the hooks are suspended.

The alternating vertical movements of the frame or carrier F are effected by a mechanism consisting as follows: The lower end of a vertical rod, on, is pivoted centrally to the frame, such rod extending upward through a slot in the upper cross-bar, (J, of the machineframe, and being pivoted at its upper end to the inner extremity or arm, n, of a horizontal lever, 0, such lever being fulcrumcd, as shown at p, to an arm, q, erected upon one end of the said bar 0, and at its outer end being pivoted to the upper end of a second rod, 1, the lower end of which, in turu,is pivoted to the knee 8 of a toggle-jointed lever, t a, which is added to the outside of the housing and below the plane of the lifting-frame F, the support of the upper arm, t, of the toggle being a bracket, 42, secured to the housing. The lower support of the toggle is a bracket, w, erected upon one end ofthe guide-plate D, before named; and this guide-plate, in lieu of being rigidly secured to the frame of the engine and serving simply as a guide to the lower ends of the drop-wires, is in this instance supported in position upon the housings by guides or ways 3 g which permit it to rise and fall, and these movements are imparted by the toggle-jointed lever before named, while the rise and fall of the carrier-frame F are effected by the lever o, the arrangement of parts being such that the frame and guide-plate move in opposite directions.

To sustain the plate D in a horizontal position and insure its correct movement, we add to the opposite side of the engine a duplicate of the mechanism last explained, the second horizontal lever being shown at a, the togglejointed lever at b 0, its supports at d and e, and the two bars of the lower bracket atf g.

The lower end of each harness-wire, in lieu of simply playing in a guide within the guideplate D, is formed with a head or bend, h, upon the upper end of the shorter portion or side of its eye or loop 1', to which the harnesscord is connected, and this head h of the dropwire is disposed above the guide-plate and intercepts the latter as it completes its ascent. When the warp is level the guide-plate is in its highest and the carrier-frame in its lowest position with the heads h of the drop-wires resting upon the top of the guide-plate, and the latter thus serving to uphold such wires and lift their upper hooked ends, 70, out of engagement with the suspensories l l, and so that upon the incoming of the pattern cylinder and card the wires not needed for the pattern are pushed inward beyond the path of movement of the suspensories, while those required for the pattern remain in a position to be engaged by such suspensories when the latter rise.

The levers 0 and a derive motion from the crank-shaft of the loom through a connectingrod or pitman, as shown in Fig. 1.

The operation ofthe above-described mechanism is brieliy as follows, it being understood that the frame F is in its lowest and theplate D in its highest position,with the pattern cylinder and card about to come in and with the warp level: The cylinder and card move in, and by pushing in a portion of the needles leave tree a portion of the drop-wires. The pattern cylinder and card move in at thesame time that frame F and guide-plate D move toward each other, so that when the pattern-card strikes the needles the hooks are clear of the suspensories l l. The carrier-frame with its rods or suspensories ll now begin to rise to meet the hooks of the drop-wires, and the dropwires by and with the guide-plate begin simultaneously to descend until the said hooks engage the rods, when the frame and plate complete their respective movements, the result being that the frame in its ascent carries with it and elevates above the warp-level such dropwircs and warp-threads as are needed for the pattern, while the other wires and warp-th reads dropwith the guide-plate below the warp-level. The shuttle passes through the warp and returns, and the carrier-frame and guide-plate now reverse their movements and return to the positions first named, the warp-threads also returning to a common level, the pattern cylinder and card retreat, and the drop-wires return to one plane in readiness for the next ensuing incoming of the pattern card and cylinder.

It will be seen that by moving the warpthreads in opposite directions to admit the shuttle, in lieu of a movement in one direction ofdouble thedistance, we avoid to a corresponding degree the stretch or tension of the warpthreads. We are also enabled to simplify the construction oftheengineand to attain a higher rate of speed of the loom.

The operatinglevers of the frame and guideboard may be actuated by any suitable motor.

\Ve claim- 1 The COlIlbll'ldtlOl'], with a vertically-movable guide board or plate, a lifting frame, and sets of hooks and needles, of a pair of levers, the suspending-rod of said frame, and the rods and toggles for depressing and raising said guide plate, substantially as described.

In testimony whereof we aflix our, signatures in presence of two witnesses.

GEORGE W. STAFFORD. HENRY BARKER.

\Vitnesses:

WILLIAM E. HEALD, Moses H. AMES.

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