US449283A - dfiyigne - Google Patents

Description

(No Model.) 4 Sheets-Sheet 1.

A. F. DEVIGN'E 80 J. P. DURAND. WEFT STOP MOTION FOR LOOMS.

No. 449,283. nted MarQBl, 1891.

(No Model.) 4 Sheets-Sheet 2.

A. F. DEVIGNE & J. P. DURAND. WEFT STOP MOTION FOR LOOMS.

No. 449,283. Patented Mar. 31,1891.

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(No Model.) 4 SheetsSheet 3. A. F. DEVIGNE & J. P. DURAND.

WEFT STOP MOTION FOR LOOMS.

No. 449,283. Patented Mar. 31, 1891'.

(No Model.) 4 Sheets-Sheet 4-.

A. P. DEVIGNE 8?; J. P. DURAND. WEPT STOP MOTION FOR LOOMS.

No. 449,283. Patented Mar. 31, 1891.

UNITED STATES PATENT FFICE.

ANTOINE ERANooIs DEvIeNE AND JEAN PIERRE DURAND, or LA OOlUR-DU- 1 PIN, FRANCE.

WEFT STOP-MOTION FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 449,283, dated March 31, 1891.

Application filed June 20, 1890. Serial No. 366,169. (No model.) Patented in France October 2'7, 1886, No. 179,169; in Belgium November 13, 1886,}10. 75,223; in England December 30, l886,N0.l'7 .O9 1; in Italy December 31. 1886, XLI, 227 in 8pain January 3, 1887.110. 10,314, and in Germany November 19, 1887, No. 51,464.

To all whom, it may concern:

13c it known that we, ANTOINE FRANqoIs DEvIeNE and JEAN PIERRE DURAND, of the city of La Cour-du-Pin, France, have invented Weft-Stop Motions for Looms, (for which we have obtained Letters Patent in France for fifteen years, dated October 27, 1886, No. 179,169; in Belgium for fifteen years, dated November 13, 1886, No. 75,223; in Great Brit- Io aim for fourteen years, dated December 30,

1886, No. 17,094; in Italy for fifteen years, dated December 81, 1886, No. 227, Vol. 41; in Spain for twenty years, dated January 3, 1887, No. 10,314, and in Germany for fifteen years, dated November 19, 1887, No. 51,464,) of which the following is a full, clear, and exact description.

This invention relates to an improved weft stop-motion for power-looms, the distinguishzo ing feature of which is that the weft is kept at a uniform tension while it is being beaten up into the fabric, whereby the latter is more closely woven with a less consumption of Weft, whereas in the old looms the weft is pushed away more or less from the goods by the weft-fork and is consequently beaten up in a more or less slack condition.

Reference is to be had to the accompanying drawings, forming part of this specification, wherein- Figures 1 and 2 show in front and side elevation as much of the loom as is necessary to illustrate the weft stop-motion. Fig. 3 is a rear elevation of the driving mechanism of the loom. Fig. at shows an elevation of the weft-fork on a larger scale in the position it occupies on seizing the weft after the boxing of the shuttle. Figs. 5, 6,and 7il1ustrate the working of the weft stop-motion. Fig. 8 is a 40 sectional plan view of the loom, showing the cam and its driving mechanism shown in Fig. 1.

r s are pairs of grids, one pair at each side of the loom, the grids being arranged one above the other between the reed n and the shuttle-boxes b, and actuated in such manner that they grasp and hold the weft in tension immediately after each passage of the shuttle through the shed, as shown in Fig. 4,

and during the beating up of the weft.

the loom 7e. ers carried at the upper ends of levers t, that while in the absence of weft the bars of the upper grid 1' will fall between those of the lower grid 3 and immediately cause the knockoff of the loom. The upper grid 0' of each pair is carried at one end of a light lever pivoted at r on the batten and terminating at the other end in a hook-shaped catch r Figs.2, 5, 6,

and 7. The lowergrid s is fixed to a verticallymovable slides, mounted on the front of the batten, and is moved upward immediately after thelaying in of the weft by the tension of aspring s acting on a lever .9 Figs. 2, 5, 6, and 7, which is permitted to come into action at the proper moment, as hereinafter described. The motion of the weft on the one hand and the object to be attained by the grids permit of definite positions of these grids 'r and s during the weaving. The grids are only permitted to close together after the laying in At other times the grids must be separated, and for this purpose the operation of the grids is controlled by the cam ('1, Figs. 1, 2, and 8, fast on the shaft g, which has a concentric depression extending around about a fourth of its circumference, and is actuated through the bevel-wheels g from the main shaft of The cam t acts on friction-rollare drawn toward said cam by a spring w. The lower ends of the levers t are connected by means of bell-crank levers t and rods 2& with vertically-movable slides to, each having two lugs r and 5 respectively, acting periodically on levers r and s and putting spring 8 in tension. As long as the corresponding friction roller bears against the highest part of the cam, the lug s depresses the lever s and the lug r acts on the lever r and raises grid r, as shown in Fig. 5. When the friction-roller falls into the depression of the cam the slide it rises. This takes place directly the shuttle is boxed at that side of the batten, which is then in its backward position. hen the slide it releases the levers 1"? and 3 the grid 4' falls down upon the weft, but the lower grid 5 is prevented from rising (by a vertical tail-piece or projection s of the lever 8 abutting against a stationary stop 5 Figs. 2, 5, 6, and 7) until the batten has commenced its forward motion, whereupon the tail-piece 5 moves away from the stationary abutment s and the lower grid sis raised by the action of the spring 8 until it meets the weft just laid between it and the upper grid, the weft being thereby nipped between the two grids, as shown in Figs. 4 and 6, so that it is held taut during the beating up, thus producing a close texture and effecting an economy of yarn.

Fig. 6 shows how the presence of the weft between the grids keeps the hook 0* out of, reach of the catch 0 of the mechanism for actuating the belt-shipper and stopping the loom. Should the weft be brokenor absent, or the shuttle be trapped in the shed, the upper grid being unsupported will drop into the lower grid, as shown in Fig. 7, and the hook T will be raised into position for engagement with the hook b, so as on the beating up of the batten to cause the belt to be thrown off and the loom to be instantly stopped.

The knocking-off mechanism of the loom is shown in Fig. 2 and comprises the catches 1, each carried by a lever 5, mounted on a fixed center and connected by rod 4, spring 3, and lever-arm l with a rock-shaft 12". On this shaft 1) is loosely mounted an arm- 1, carrying a spring-pressed catch r adapted to engage with a trigger o and swing it from the normal position into the position shown,

bination of two vertically-movable grids r and s, the upper grid 4" being adapted to drop which is in a path of a lug r on the periphery of a wheel i2 fast on the main shaft K. The trigger v is pivoted toa vertically-sliding bar 0 which, on the trigger o being struck by the lug 11 is slid upward in its guides and acts on an elbow-leverm,

Figs. 2 and 3, connected at its lower end with lug 11 against the trigger upper end of arm 2 for the purpose of keeping rod. 4 from falling, may move without pulling the arm 1, since there'is only a spring 3 connecting them, said springbeing only strong enough to overcome the ordinary resistance occasioned in the regular working of the machine. The attendant can also stop the loom and of which the other arm is forked and embraces the grooved collar of the clutch m. j hen the enlargement or is between the pulleys 00 m the clutch is disengaged, and this is the normal position of working, the beltshi'pper being then opposite the fast pulley; but when the belt is thrown onto the loose pul ley the clutch is thrown into gear, and so enables the workman to drive the loom slowly by hand through the medium of the handwheel y, the'inclined shaft y, and bevelgears g Weclaim In a weft. stop-motion for looms, the comby gravity and the lower grid 8 being sliding stop 8. the slide-bar to, having the stops r 'ands ,and the lever r and catch 12, substantially as herein shown and described.

The foregoing specification of our weft stop- I motion for power-looms signed by us this 23d v.day of'M'ay, 1890.

ANTOINE rRAnoois DEVIGNE. J'EAN PIERRE DURAND.

Witnesses:

EDW. P. FAIRFIELD, BoURILLo, J H. MEYER, H. BARINED.

.by pushing the rod '0 Fig. 2, which is With-

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