US141768A - Improvement in loom-shedding mechanisms - Google Patents

Description

4Sheets--Sheet I. G. CROMPTUN.

Loom-Shredding Mpc a'nism. l N0. 4l-,768. Patented Augus t2,1873.

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Lunm-Sheding Mechanism.

Patented August12,l873.

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G. EROMPTON.

Loom-shedding Mechanism.

Patented August 12, 1873.

AM. pHoro-urnaM/:PH/c co, Mmamonwefs Pnocsss) Patented August 12, 1873.*

PATENT OEEIcE GEORGE OROMPTON, OF WORCESTER, MASSACHUSETTS.

IMPROVEMENT IN LOOM-SHEDDING MECHANISMS.

Specification forming part of Letters Patent No. 141,76, dated August 12, 1873; application filed November 1l, 1872.

To all whom it may concern Be it known that I, GEORGE CRoMPToN, of Worcester, in the county of Worcester and State of Massachusetts, have invented an Improvement in Looms; and I do hereby declare that the following, taken in connection with the drawings which accompany and form part of this specification is a description of my invention sufficient to enable those skilled in the art to practice it.

The invention relates particularly to details i of construction and arrangement of the harness mechanism of that class of fancy looms in which the top and bottom of each harnessleaf is connected with the inner ends of two upper and lower horizontal jack-bars, the two bars for each leaf of harness being in the same vertical plane and sliding in vertical slots in suitable guide-plates.

The drawing represents a harness mechanism embodying my invention.

Figure lshows the mechanisminplan. Fig. 2 is an end elevation of it. Fig. 3 is a side elevation. Fig. 4 is a sectional elevation.

a denotes the loom-frame; b, the frame that directly supports the harness-motion and pattern mechanism; c, the shaft that actuates the harness mechanism and the pattern mechanism. This shaft has at its outer end a crankwheel, d, connected by a link, e, with -a vertical slide-rod, f, whose upper end is jointed to one arm of a lever, g, the other arm of said lever being connected by a link, h, with a rocker, t, on a shaft, 7e, that carries at its opposite end another rocker, l, the opposite arm of these respective rockers being jointed to the respective ends of thelifter, depresser, and evener bars, the movements of the rockers effected by their connection with the shaft c, reciprocating the said bars to actuate the jack mechanism. The shaft c also carries awheel, m, a pin extending from which,intermittently, engages with the notches of a crown-wheel, o, on the foot of a shaft, p, at the upper end of which is a bevel-wheel, q, meshing into and driving a bevel-gear, r, on the end of the shaft or journal of the pattern-cylinder, the intermittent movement of the pattern-cylinder being thus produced from the shaft. By means of the crown-wheel o and pin-wheel a the shaft may be freely turned in either direction, or as freely in one as in the opposite direction, and

to actuate the lifter, depresser, and evener4 mechanism without moving the pattern-cylinder or changing the shed, or to enable the cylinder to be turned independently from the other mechanism, I make the shaft p in two parts connected by a clutch-wheel, q1, and` sliding clutch r1, the wheel q1 being fast on the lower part of the shaft, and the clutch T1 sliding on the upper part of the shaft, but being splined to it. Into a groove, s, formed around the hub of the clutch r1 an arm, t, enters, said arm extending from one end of a shaft, u, at whose otherl end is a hand-lever, o. By depressing this handle the clutch r1 is raised and wheel, and the cylinder may then be'turned by hand for inspecting or changing the pins, or the warps may be raised and lowered, the downward movement of the arm o raising the detainer-roll w that enters the notches of the wheel m of the pattern-cylinder to hold the cylinder in position without changing the shed or moving the cylinder. When the lever o is released a spring, y, throws down the arm t, re-engages the clutch r1 and clutch-wheel q1, and brings the roll w against the wheel a'. a2 denotes the upper set of jack-bars, and b2 the lower set, each pair for each leaf of the harness being placed with one bar directly over the other, and passing through vertical guideslots c2 in two plates, d2 e2. At the inner end of each is a notch, f2 or g2, the upper harness cording running from they top of the harnessleaf over a suitable guide-sheave to the notch 2 of the upper jack-bar, and the bottom cording to the inner end of alever, h2, whose outer end is connected by a wire a-nd cording to the notch g2 of the lower jack-bar. Adjacent to the inner ends of the jack-bars the upper bars a2 pass over a single lifter and depresser bar, i2, and the lower-bars b2 under said bar t2, and beyond the range of slide movement of said bar t2 the lower jack-bars b2 pass over the pattern-cylinder z, the pins of the cylinder acting directly only upon the lower jack-bars, while beyond the cylinder the jack-bars a2 b2 of both sets pass under a single evener-bar, 7a2, which bar, however, is slotted, or made in two parts the lower jack-bars bI passing under and en gaging with the lower part l2 of the evencr disconnected from the clutch- 2 minces bar, and the upper jack-bars a2 passing under and engaging with the upper part m2- thereo', it being necessary, therefore, only to have two connections for each end of the lifter, depresser, and evener bars, which connections are effected by a single rocker, one arm of the rockeri being jointed to one end ot' the lifter and depresser bar i2, and the other arm of said rocker to the adjacent end of the evener-bar k2, while the corresponding arms of the other rockerl are similarly jointed to the opposite ends of the lifter and depresser bar 2 and evener-bar 7a2.

To eft'ect the distribution of the jack-bars, each upper bar a2 has an under hook, n2, and each lower bar. b2 has a top hook, o2, each pair of hooks n2 o2 being in line or in the plane of the outer side of the lifter' and depresser bar i2 when the jacks are evened, and one or the other of them being always in position to be moved by the lifter and depresser bar when it advances. rlhe upper jack-bar is normally iu connection with the lifter and depresser bar, being held against it by the stress of the harness cordin g, and if it is not moved from such position by the rise of the jackbar beneath it (by a pin of the pattern cylinder) the lifter and depresser bar will move it outward and raise the harness-leaf con-A nected to it, the bar beneath it being moved in the opposite direction by the rise of the harness-leaf. But if the lower jack-bar be raised by a pin of the cylinder, it will raise the bar over it, throwing the hook of the latter bar out of the path of movementV of the lifter and depresser bar, and its own hook 'into such path of movement, so that the lower bar will be moved forward by the lifter and depresser bar, and will thereby depress the harness-leaf connected thereto, the upper bar being drawn inward by the movement ofthe harness-leaf. Thus the upper jackba-rs are always lifters and the lower jackbars depressers in their positive or forward movements, or their movements directly cffected by the lifter and depresser bar, their opposite movements being negative, or leii'ected by the movements ot' the harness-leaves to which they are connected.

Each jack-bar a2 b2 is made with an npwardlyextended hoolr, jz, and whichever jacks are drawn inward by the harness-leaves their hooks will follow the part ofthe evenerbar, above which they project, the two parts of the evener-bar being thus always in position to even all the jacks, the upper jacks drawn in being carried back by the upper part of the bar, and the lower jacks drawn in being carried back by the lower part of the bar, and all being thus evened.

To enable the lifter and depresser bar to yield, so that in case of disarrangement of the pins of the pattern cylinder they shall not be broken, suchl bar slides under levers p2, pivoted at q2 and held down to the bar i2 by springs r2, encirling rods running through the ends of the levers, these levers yielding and permitting the lifter anddepresser bars to yield and let the pins or rolls pass without breaking. Y

To enable all the warps to be raised at once, a shaft, s2, is used, this shaft carrying eceentrics t2, upon which rest pivoted arms a2, whose free ends extend under projections from the lifter and depresser bar. By turning a handle, e2, at the end of the shaft the 4eccentrics raise the arms u2, which raise the lifter and depresser bar. The shed having been formed, such rise of the bar will free it from the engagement with the lower jacks, which may be engaged therewith, and the harness-leaves connected to such jacks will then be free, and may be raised wit-h their warps.

` The lifter and depresser bar (in this movement) is raised against the stress of the sprin gs r2, and when the eccentrics are turned back the stress of the springs forces back the lifter and depresser bar. The sheaves for the cording of the lower jack-bars turn upon a pin, wg, resting in stationary bearings, but the sheaves for the cording of the upper jackbars turn on a pin, m2, mounted in bearings in a pivoted frame, made adjustable, to regulate the stressupon the cording and harness leaves. These bearings are in horizontal arms ofthe yoke or frame, and said frame mounted on pivots y2 has upright arms connected b v a cross-bar, z2. Through this bar a nut-thread is cut, and an adj listing-screw, a3, works through this nut-thread and against the face of the stationary bar b3, the sheaves being raised or lowered by turning the screw, andthe screw being kept in position by a suitable checknut.

l claiml. rlhe link h, in combination with the rockers t' Z, and bell-crank lever g, and reciprocating slide-rod f, substantially as shown and described.

2. The arms or levers p2 and springs r2, substantially as shown and described, in combination with the lifter and depresser bar 2.

The shaft s2, eccentrics t2, and arms a2, or their equivalents, ior raising the lifter and depresser bar, substantially as shown and described.

4. IThe shaft p'provided with the clutch q1 and crown-wheel, combined with the sliding clutch, its shaft and gear-wheel, the patterncylinder, and the two-armed shaft a t c, the arm fu acting against the wheel m of the pattern-cylinder, and all operating as described.

GEO. CROMPTON.

l W'itnesses:

J. A. WARE, J. B. Smm.

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