US1742882A - Protector mechanism for looms - Google Patents

Description

E. W. STONE PROTECTOR MECHANISM FOR LOOMS Jan. 7, 1930.

Filed April 15, 1929 2 Shets-Sheet 1 /N VENT'OR/ 47TORNE) Jan. 7, 1930. w, STONE 1,742,882

' PROTECTOR MECHANISM FOR Looms Filed April 15, 1929 2 Sheets-Sheet 2 ATTORNEY Patented Jan. 7, 1930 UNITED STATES PATENT ()FFICE FORD CARPET COMPANY, OF THOMPSONVILLE, CONNECTICUT, A CORJPORATION OF" MASSACHUSETTS PROTECTOR MECHANISM FOR LCOMS- Application filed April 15,

This invention relates to looms, and is more particularly directed to the protector mechanism whereby the loom is stopped and the lay arrested when the shuttle fails to be properly It is now the common practice to provide looms with some character of protector mechanism to prevent injury to the warp threads when, during weaving, a shuttle fails to be properly boxed or remains partly in the shed. In the absence of some means to stop the loom and arrest frontward movement of the lay the warp threads are liable to become seriously injured or broken.

There are now generally recognized two different forms of protector mechanism, one in which a rod or other shipper controlling means is operated when the shuttle fails to box properly and the lay is thereupon arrested before it reaches front position. The second form of protector mechanism is that generally known as the sliding frog which is engaged by a dagger as the lay moves frontwardly, and through the sliding frog the loom is brought to rest.

During recent years a demand has arisen for fabrics of increased width, such, for instance, as carpets, rugs and the like, and this has introduced serious problems with respect to the protector mechanism by reason of the fact that as the lay is of increased length and weight, its momentum is greatly augmented, so that protector mechanism which may be practical and efiective in the narrower looms becomes unsuitable for the wider looms where the lay momentum must be overcome before the lay reaches front position.

In accordance with the present invention. the loom stopping mechanism is associated with a bumper mounted on the breast beam for engagement with the dagger when a shut tle fails to properly box, and means are provided to so control the bumper as that notwithstanding the lay momentum that must be overcome, the bumper will act to arrest the lay movement before the lay reaches front position and prior to the breaking of a warp thread by a trapped shuttle.

More specifically stated, the present inven- 50 tion contemplates a bumper of novel construc- 1929. Serial No. 355,043.

tion under the influence of one or more heavy springs to permit the bumper to yield to an extent and yet arrest the lay movement before injury is done tothe warp threads.

The invention and novel features'thereof will best be made clear from the following description and the accompanying drawings of one good form thereof, and while the present invention may be advantageously employed in looms of any width, it is more especially applicable and its advantages more clearly manifested in a loom for weaving wide fabrics, such as carpets, rugs and the like.

In the drawings:

Fig. 1 is aside elevation with parts in section and others broken away, showing sufiicient portions of a loom embodying the pres ent invention;

Fig. 2 is a perspective view at one side of a loom containing the present invention, some of the parts being broken away;

, Fig. 3 is an enlarged sectional plan view showing the details of the novel bumper.

The I loom frame may be of any desired construction but as herein shown it is of the general character that is adapted for weaving heavy fabrics such as carpets, rugs and the like, and comprises side members 1 in which is supported the lay operating shaft 2 which may be conveniently driven by a gear 3 from a driver 4:. The lay 5 is mounted as usual upon the lay swords 6" which are mounted uponthe lay rock shaft 7 extending transversely of the loom.

As shown in the present instance of the invention, the lay operating shaft 2 is provided with suitable crank arms 8 which are connected to the toggles 9 and 10, one of which, as-lO, is secured to a frontward projection of the lay sword 6 and the other of which, as 9, is attached to a portion of the loom frame to the rear of the lay sword, the construction being such that when the lay operating shaft 2 is rotated, the lay will be given its usual beat-up movements.

The loom is provided, as usual, with a takeup mechanism for taking up the cloth as it is woven, and this is typified in Fig. 1 wherein the cloth roll 12 is shown as actuated from a worm wheel 13 engaged with a worm 14 tle boxes 17, one at each end thereof, and only driven through suitable mechanism, such, for instance, as the toothed wheels 15 and 16 which may be operated from any going part of the loom. The details of these portions of the loom constitute no part of the present invention and require no further explanation.

The lay 5 is provided with the usual shutone of which is shown in Fig. 2. As usual, also, each shuttle box is provided with a binder, such, for instance, as 18, shown in the present instance as associated with the front box plate 19, but since these parts may also be of any general and well-known construction they require no further explanation except that when the shuttle 20 enters the shuttle box and is properly therein, the binder 18 will be moved outwardly by the shuttle.

Mounted upon the lay is the protector rod 21 from which extend the fingers 22, one at each side'of the loom, and such fingers are held in contact with their respective binders 18 by yielding means, such, for instance, as the spring 23, one end of which is secured to a bracket 24, carried by the lay, and the other end of. which is connected to a projection 25 extending from the protector rod.

These details may obviously be varied, the essential being that when a shuttle enters the shuttle box and is properly boxed therein, the associated binder 18 will be moved outwardly to thereby rock the protector rod.

The protector rod 21 has secured thereto the frontwardly extending dagger 26, whose position is obviously controlled by the protector rod.

The driver 4 for the lay operating shaft is shown in the present instance of the invent-ion as actuated through a gear 27 which is operatively engaged with a gear 28 mounts ed on a shaft 29 which may beand preferably is driven by a motor or other suitable form of driving means.

Since the loom is to be stopped from time to time means are associated with the motor driven shaft 29 to operatively connect and disconnect it from the driv ng source or power, and in the present instance of the invention this connecting and disconnecting mechanism is embodied in a clutch 30, Fig.

- 2, but obviously any means may be utilized for this purpose.

The clutch is operated by a lever arm 31 pivotally mounted at 32 and having its end 33 connected to a rod 34.

Mounted upon a bracket 35 is the stud 36 having therocking sleeve 37 from which pro jects an arm 38 connected to the rod 34, the construction being such that should they rocking sleeve 37 be actuated, it will effect driving connection or disconnection of the gear, 28 with the driving source. If desired, a brake 39 may be employed to assist in bringing the loom to rest, but the details of such mechanism may vary within the true scope of the invention, as will later appear.

Extending frontwardly from the rock ng sleeve 37 is an arm 40, to the front end portion of which is connected a link 41, the opposite end whereof is connected at 42 to a gear actuated lug .43.

Mounted for rocking movement in a bearing 44 rising from the breast beam or other suitable support is the shaft 45 carrying the gear or pinion 46 which is engaged with a toothed wheel 47 appropriately supported in bearings 48on the loom frame.

Extending from the toothed wheel 47 is the arm 49 to which is pivoted the downwardly 2 are in loom running position, and should the stop shaft 58 be rocked in a clockwise directi-on, viewing Fig. 2, it will act through the train of mechanism hereinbefore de- 7 scribed to disconnect the clutch and throw the power from the machine.

It is frequently desired to control the loom operation by hand, and for this purpose there is provided a hand lever 59 which is secured to the shaft 44, the construction being such that should the hand lever 59 be turned to the right, Fig. 2, it may act through the train of mechanism beween it and the clutch to effect loom stoppage without disturbing the position of the stop shaft 58, a condition that is permitted by reason of the slot 51 in the link 50,and similarly, the loom may be started by movement of the hand lever 59 in the opposite direction.

As hereinbefore stated, the present invention includes a bumper which may be actuated by the dagger on frontward movement of the lay when a shuttle fails to be properly boxed and bring the loom to rest before the lay has reacheda sufficiently frontward posi tion to cause injury to the warp threads by a trapped shuttle.

In the present instance ofthe invention, the

bumper 6O ispivotally mounted upon the' breast beam 11 by a loose pivotal connection, constituted in the present illustrationby a pin and slot device. Referring more particularly to Fig. 3, the bumper 60 is provided with the elongated slot 61 into which proare secured by the adjustable bolts 65 to the rear portion of the breast beam 11, the construction being such that the long arm of the bumper lever will be normally impelled rearwardly, or at least the frontward movement thereof will be opposed by the strong spring action of the springs 63.

Between the loose pivotal support of the bumper lever 60 and the end of the long arm thereof, the bumper is provided with a frog engaging part 66 preferably formed with a notch or dove-tail 67 which may be engaged by the dagger 26 when the latter is in its raised position under the dictates of the protector rod 21 when a shuttle fails to be properly boxed.

Secured to the loom frame, and as shown in the present instance of the invention, there is a fulcrum stop 68 which may be conveniently formed by a bolt 69 and secured to the loom frame or breast beam 11 by suitable means, such as the nut 70, and the short arm 71 of the bumper lever is provided with an engaging end 7 2 which rests against the fulcrum stop 68 under the backward pull of the springs 63 acting on the long arm of the bumper lever and tending to turn the bumper lever about its pivotal connection with the breast beam, as indicated in Figs. 2 and 3.

From the construction described it will be apparent that when thebumper lever 60 is actuated by the frog 26 on frontward movement of the lay, the bumper lever will turn about the fulcrum stop 58 as a center and the springs 63 will exert their maximum effort to arrest the frontward movement of the lay. As the bumper lever is thus actuated, the loose pivotal connection between it and the breast beam relieves the pivotal connection from strain, which would be liable to shear the pin constituting one of the pivotal connection elements.

Mounted upon the stop rod 58 is the arm 73, the upper end portion of which is connected to a shackle 74: on the long arm of the bumper lever, with the result that when the bumper lever is turned about the fulcrum stop against the stress of the springs 63 as the'lay moves frontwardly, the stop shaft 58 will be rocked and through the connections with the clutch, as hereinbefore described, will throw the power from the machine and the lay will be yieldingly arrested by the energetic action of the springs 63 before it reaches front position, notwithstanding the increased momentum of the lay due to its weight.

What is claimed is:

1. In a protector mechanism for looms, the combination of the breast beam, the lay, and shuttle boxes, a protector rod on the lay having a dagger, a bumper for engagement by the dagger on frontward movement of the lay when the shuttle fails to be properly boxed, a loose pivotal connection between the breast beam and bumper permitting pivotal and bodily movement of'the bumper relative thereto, a fulcrum stop, yielding means acting upon the bumper to engage the end thereof with the fulcrum stop that the latter may take the strain transmitted to the bumper by the dagger and prevent injury to the said pivotal connection, and loom stopping mechanism actuated by the bumper.

2. In a protectormechanism for looms, the combination of the breast beam, the lay, and shuttle boxes, a protector rod on the lay having a dagger, a bumper forengagement by the dagger on frontward movement of the lay when the shuttle is not properly boxed, loom stopping means, a pin and slot connection between the breast beam and bumper permitting the bumper to move bodily relative to its connection with the breast beam, a fulcrum stop on the breast beam, yielding means acting upon the bumper to. turn it about its connection with the breast beamand engage the end of the bumper with the fulcrum stop that the bumper may turn, about the fulcrum stop as a center under impact of the dagger.

3. In a protector mechanism for looms, the combination of the breast beam, the Lay, and shuttle boxes, a protector rod carried by the lay and having a dagger, a bumper lever having a pin and slot connection with the breast beam, a fulcrum stop mounted for engagement by the end portion ofv the bumper lever and constituting the center about which the bumper lever moves under the impact of the dagger, spring means acting upon the opposite end portion of the bumper lever and stopping mechanism actuated by the bumper.

4. In a protector mechanism for looms, the combination of'the breast beam, the lay, and shuttle boxes, a protector rod carried by, the

lay and having a dagger, a bumper constituted as a lever having a pin and slot connection with the breast beam adjacent one end of the lever, a spring actingupon the bumper remote from its pin and slot connection with the breast beam and tending-to turn the long arm of the lever rearwardly, and a fulcrum stop engaged by the end of the short lever arm to sustain the impact of the dagger with the bumper.

5. In a protector mechanism for looms, the combination of the breast beam, the lay, and shuttle boxes, a protector rod carried by the lay and having a dagger, a bumper constituted as a lever, a pin and slot pivotal connection between the bumper lever and breast beam forming long and short lever arms, spring means acting on the long lever arm tending to turn it rearwardly, and a fulcrum stop on the breast beam against which the short lever arm bears and about which the bumper lever turns as a center under the impact of the dagger.

6. In a protector mechanism for looms, the

combination of the breast beam, the lay, and shuttle boxes, a protector rod carried by the lay and having a dagger, a bumper constituted as a lever, a pin and slot pivotal connection between the bumper lever and breast beam forming long and short lever arms, spring means acting on the long lever arm tending to move it rearwardly, a fulcrum stop on the breast beam against which the short lever arm bears and about which the bumper lever turns as a center under the impact of the dagger, and a dagger engaging part carried by the long arm of the bumper lever.

7. In a protector mechanism for looms, the combination of the breast beam, the lay, and shuttle boxes, a protector rod on the lay having a'dagger, a bumper for engagement by the dagger on frontward movement of the lay when the shuttle fails to be properly boxed, a loose pivotal connection between the breast beam and bumper permitting pivotal and bodily movement of the bumper relative thereto, a fulcrum stop, yielding means acting upon the bumper to engage the end thereof with the fulcrum stop that the latter may take the strain'transmitted to the bumper by the dagger and prevent injury to the said pivotal connection, loom stopping mechanism actuate by the bumper, a stop shaft connected to the bumper lever, and means actuated by the stop shaft on frontward movement of the bumper lever to stop the loom. p

8. In a protector mechanism for looms, the combination of the breast beam, the lay, and shuttle boxes, a protector rod carried by the lay and having a dagger, a bumper constituted as a lever, a pin and slot pivotal connection between the bumper lever and breast beam forming long and short lever arms, spring means acting on the long lever arm tending to move itrearwardly, a fulcrum stop on the breast beam against which the short lever arm bears and about which the bumper lever turns as a center under the impact of the dagger, a stop shaft, an arm extending from the stop shaft and actuated by frontward movement of the long lever arm of the bumper lever, and means actuated by rocking movement of the stop shaft to stop the loom. In testimony whereof, I have signed my name to this specification. V

EDWIN W. STONE.

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