US2074955A - Clutch and brake mechanism for looms - Google Patents

Description

March 23, 1937. J CAMPS 2,074,955

CLUTCH AND BRAKE MECHANISM FOR LOOMS Filed Sept. 3, 1932 3 Sheets-Sheet 1 March 23, 1937, CAMPS 2,074,955

- CLUTCH AND BRAKE MECHANISM FOR LOOMS Filed Sept. 3, 1952 3 Sheets-Sheet 2 March 23, 1937. J, P. CAMPS 2,074,955

' CLUTCH AND BRAKE MECHANISM FOR LOOMS Filed Sept. 3, 1932 3 Sheets-Sheet 3 Patented Mar. 23, 1937 UNITED STTES AENT OFFICE CLUTCH AND BRAKE MECHANISM FOR LOOMS Juan Picafiol Camps, Sabadell, Spain 2 Claims.

This invention relates to improvements in stopping and starting arrangements for weaving looms and has for its object to provide a device of this character capable of stopping the loom quickly and completely during normal operation.

Various stop motion mechanism have heretofore been proposed for stopping the loom during normal operation, functioning more or less rapidly, with a varying degree of absorption of the shock produced by the dagger when hitting the frog.

The devices hitherto proposed are, however, only suitable for looms wherein the number of picks per minute does not exceed 150, so that modern looms, which are more rapid, cannot be stopped by the cooperation of the dagger and its frog. In this case, therefore, in order to prevent the shuttle from breaking the threads if the shuttle remains in the shed the loose reed has to 20 be resorted to.

The object of the present invention is to provide a device enabling the loom to be stopped by turning a hand wheel or the like such stopping being effected by means of an auxiliary dagger 25 and the frog even if the loom is working at more than 200 picks per minute.

Broadly speaking according to the invention in addition to the usual stop motion dagger an idle dagger is mounted loosely on the stop rod,

30 the said idle dagger being adapted to influence in its operative position the same frog for actuating the clutch and brake operating means as the stop motion dagger, the said idle dagger being normally held in its inoperative position by hand 35 controlled means.

With the above and other objects in view that will become apparent as the nature of the invention is better understood, the same consists in the novel form, combination and arrangement of parts hereinafter more fully described, shown in the accompanying drawings, and claimed.

In the drawings:

Figure 1 is a vertical cross-sectional view showing a part of the clutch operating mechanism,

5 Figure 2 is a front elevational view, partly in section, and

Figure 3 is an elevational view, similar to Figure 2 on an enlarged scale.

As shown in Figure 1, the crank shaft F has a 50 collar A slidably mounted thereon which acts on the levers B for engaging and disengaging the friction cones C and D according to the direction of movement imparted thereto, the friction cone D being secured to the crank shaft F. The brake .55 shoe E comprises two jaws which may be opened and applied to the inner surface of the cone drum D. The hand wheel V as shown in Figures 2 and 3 is mounted on one end of the shaft to the other end of which shaft is secured an arm I which slides when the wheel is rotated and causes the 5 rod U that is pivoted thereto at one end to rise and fall. Pivotally attached to the other end of the rod U is an arm J which is secured to the shaft AA as shown in Figure 1.

As shown in Figure 2, an arm K is fixed to the 10 opposite end of the shaft AA and to which is pivotally connected a link L, the other end of the link having pivotal connection with the lever N that is operatively engaged with the sliding collar A. Pivotally connected to the rod U by a pin and slot connection is a lever b, the other end of which is pivotally attached to the frame of the loom as at b. The lever b carries a striker S intermediate the ends thereof and the purpose of which will be later described.

As shown in Figure 2, an auxiliary idle dagger P is pivotally mounted on the stop rod 0 of the lay d adjacent the usual stop motion dagger Q, the auxiliary dagger P being provided with a roller P that slides on the upper flat surface of the bracket R. that is mounted on the rod U and is adapted to be lowered and raised therewith. The frog T for the dagger Q is slidably mounted on the frame or a stationary slideway connected therewith and a cushioning spring X is provided to damp the blow of either the usual dagger Q or the idle dagger P when either of the daggers strikes the frog T. The two-armed lever Z, as shown in Figure 2, is pivotally mounted on the frame of the loom and its upper end is slidably and pivotally connected to the rod Y and is subject to the action of the spring X that surrounds said rod, while the lower end of the lever Z is pivoted to the link AB, the other end of the link AB being pivoted as at H to the lever H. v

The other end of the lever H is connected to the lever M which serves to expand the brake shoes E by virtue of its connection to one of them, whereby the brake shoes will be applied to the inside surface of the cone drum D. The brake shoes are held together by a spring N the tension Cir enter the shuttle box a, and in addition, the loom may be stopped even if the shuttle enters the box by pre-setting in any position of the shuttle the idle dagger P, when the frog T will be operated at the next beat up movement of the lay d.

When the loom is operating, the roller P on the auxiliary idle dagger P will run backwards and forwards on the raised bracket R out of the range of the frog T. The shuttle will enter the box a before the lay 02 beats up. Onthe shuttle entering the box a it swings the bell-crank lever Q about the stop rod 0, thereby raising the stop motion dagger Q so that it does not come into contact with the frog T for operating the stop motion. The frog therefore is pressed in its extreme left position under the action of the spring X and the lever b mounted in its raised position so that the clutch CD is kept engaged by the lever system U, AA and L. At the same time the spring X presses the lever Z inwardly thereby pulling the rod AB in the opposite direction and disengaging the brake shoe E.

If the shuttle does not enter the box a, the

' bell-crank lever Q of which the stop motion dagger Q forms one arm is not rocked round the stop rod 0 and remains in its operative position as shown in Figure 2. When the lay d beats up, the stop motion dagger Q strikes the frog T thereby compressing spring X. Meanwhile, the cam surface T of the frog Trides upon the striker S depressing same and therewith the lever b and rod U connected thereto, whereby the clutch C--D is disengaged through the lever system. On further movement of the frog T, the lever Z is rocked and brings into operation the brake shoes E whereby the lcom is stopped.

For restarting the loom, the lay must first be brought into the position shown in Figure 2 whereupon the hand wheel V is rotated in a clockwise direction for oscillating the arm I. The rod U will be raised accordingly, rocking the lever b and lifting its striker S into the position shown in Figure 2. The stop motion dagger Q is assumed to be raised by the shuttle after the necessary adjustments have been made which leaves the lay d free to be moved by the crank shaft by means of the connecting rod 0, it being noted that the spring X, which is no longer held compressed, rocks the lever Z in the reverse direction, therebyreleasing the brake. Simultaneously with the upward movement of the rod U the bracket R raises the idle dagger P together with its roller which slides on the bracket R while the loom is working. At the same time, the lever U causes the shaft AA to rotate in the same direction as the wheel V thereby rocking the lever N through the link L so that the friction cones C and D provided on the shaft F of the crank of the loom are engaged. The operation of engaging the friction cones C and D, is facilitated by a sliding collar A, which, by means of the levers B causes the cone C to approach the cone drum D until the engagement takes place.

As will be seen from the foregoing description,

on actuating the hand wheel V, four actions take place almost simultaneously; return of the frog T into its original position; lifting of the dagger P, release of the lever Z and consequent disengagement of the brake under the action of the spring X and engagement of the friction cones through the action of the sliding collar A.

As all of these operations are produced instantaneously when rod U rises, it is evident that the starting up of the loom will not be retarded by the brake mechanism because the latter is released by the slightest movement of the hand wheel.

If it is required to stop the loom by hand, it is only necessary to turn the hand wheel V in an anticlockwise direction. In this case, the rod U is lowered together with the bracket and the idle dagger P supported thereby which causes the latter to become operative against the frog T. Through the lowering of rod U, the clutch is disengaged and through the action of the idle dagger P upon the frog T, the brake is applied in the manner hereinbefore described.

It is now clear that the device in addition to being able to instantaneously stop looms which work at a velocity of more than 200 picks per minute has the great advantage that when the m is stopped by means of the wheel or the like, the shuttle will always be held at the end of its path, thus avoiding breakage of the threads of the shed.

I claim:

1. A brake mechanism for looms, comprising in combination, a lay, a driving shaft, a friction wheel carried on said shaft and having a recess on one side, a friction cone shiftable on said shaft, a sliding collar on said shaft adapted to move said shiftable cone into engagement with said friction wheel, a two-part brake shoe in the recess in said friction wheel, a lever mechanism connected with said sliding collar, a rod connection with said lever mechanism, a hand wheel connected to said rod and adapted to shift said rod to engage and disengage said friction cone and wheel, a second lever and link mechanism connected to said brake shoe, shutter protector mechanism mounted on said lay, frog mechanism connected to said second lever mechanism,

a link pivotally mounted on the frame of the loom and connected to said rod connection and adapted to be actuated by said frog to move said first named lever mechanism to release said friction cone upon actuation of the frog by said protector mechanism whereby when shuttle protection occurs the friction cone is released through said frog and link and subsequently said brake applied and whereby said friction cone may be manually engaged and released by operation of said hand wheel.

2. A brake mechanism for looms, comprising in combination, a lay, a stop rod on said lay, a main stop motion dagger on said rod, an auxiliary idle dagger loosely mounted on said rod beside said main stop motion dagger and having a tapered end, a slidable frog in the path of said stop motion dagger, a bracket supporting the free end of said auxiliary idle dagger, a vertically shiftable rod carrying said bracket, a hand wheel mechanism connected to said rod to raise and lower said rod and consequently said idle dagger through the intermediary of said bracket to lower said idle dagger into engagement with said frog to shift said frog upon beat up of the lay, a friction clutch, and connections between said hand wheel and said frog and clutch to operate said clutch upon actuation of either the frog or hand wheel, a brake device, and linkage between said frog and said brake device controlled by the movement of said frog to apply said brake device when said frog is actuated.

JUAN PIcAfioL CAMPS.

Images