US2175787A

US2175787A - Weft cutting device

Info

Publication number: US2175787A
Application number: US262043A
Authority: US
Inventors: Woodruff T Sullivan
Original assignee: Individual
Current assignee: Individual
Priority date: 1938-10-14
Filing date: 1939-03-15
Publication date: 1939-10-10
Anticipated expiration: 1956-10-10

Description

Oct. 10, 1939. w. 'r. SULLIVAN WEFT CUTTING DEVICE Original Filed Oct. 14, 1938 31 vumvfoz, WOODRUFFZSULL/Vd.

M4) illtornu s Patented Oct. 10, 1939 UNITED STATES PATENT OFFICE Original application October 14, 1938, Serial No. 235,044. Divided and this application March 15, 1939, Serial No. 262,043

'3' Claims.

This invention relates to a weft cutting device, which is shown and described in my original application, filed October 14, 1938, Serial No. 235,044, entitled Shuttleless loom, and this case is a division from said application, Serial No. 235,044.

An object of this invention is the provision of a novel and efficient cutting device for use in severing the weft or filling at an edge of the shed or fabric.

Another object of the invention is the provision of a novel and efficient cutting means, in a shuttleless loom, which cutting means operates in timed relation with the looper device and the retrieving device at one edge or contiguous to the shed, so that the filling is left free to be turned into the shed by my novel looping means, fully disclosed in my copending application.

It is to be understood that my improved cutting means is also to be used in connection with and in timed relation to not only the retrieving device, but also in connection with the inserting device; therefore the application of the cutting means is not limited merely to one side of the fabric, as it is adapted to be used on both sides thereof.

With the foregoing and other objects in view, the invention comprises certain novel constructions, combinations and arrangements of parts as will be hereinafter fully described, illustrated in the accompanying drawing, and more particularly pointed out in the appended claims.

In the drawing:

Figure 1 is a fragmentary elevated view of a shuttleless loom, showing the weft cutting device.

Figure 2 is a fragmentary plan view of a shuttleless loom, showing the weft cutting device in position with the other contiguous cooperating devices of said loom.

Figure 3 is a sectional view taken on line 3-3, Figure 1, and looking in the direction of the arrows.

Referring to the .drawing, in which I have shown the preferred embodiment of this invention, the scissors 5 comprises the upper blade 2 and the lower blade 3. These blades are mounted on a stud 4 of the primary oscillating lever 5. This lever 5 is provided with a stud 6 mounted in hub I. On stud B is mounted a second or auxiliary oscillating lever S. This lever 55 has a downwardly projecting flange or extension 9, in which is mounted the adjustable screw i9. Screw I0 is provided with the usual check nut H, whereby the screw is locked in its adjusted position upon flange 9. This oscillating lever 8 is held in position by a coil spring l2, which spring is fastened at one end to lever 8 and at its other end to bracket l3.

The upper end of the auxiliary oscillating le- 5 ver 8 is constructed with an integral tang or yoke M; yoke M has two slots l5, 15 (Fig. 3), formed near its ends, and the outer ends of

blades

2 and 3 are slidably mounted in said slots l5.with the inner ends of slots i5 bearing at 10 tion for moving longitudinally of the blades, to- 20 wards pivot 4, for closing together the cutting ends of said blades.

Auxiliary oscillating lever 8 has also an upwardly projecting lug H, in which is mounted the adjusting stop screw I8, provided with a 25 check nut l9. Lever 5 has a downwardly projecting finger 20 which is held under spring tension by means of spring 2|; this spring is connected at one end to said finger 20 and at its other end to a downwardly projecting finger 22 on bracket I3. Lever 5 is also provided with a projecting portion 23 which acts as a stop lug for engaging the adjustable screw 24; screw 24 is mounted on the integral lug 25 which extends outwardly from bracket 13. on frame 26 by means of bolt 21. It is also to be noted that screw l8 engages at the inner end an integral lug 28 which extends outwardly from the primary lever 5.

Referring to Figure 1, this illustration shows 0 the device in position as when the lay has moved toward the front of the loom and is about to operate. The filling 29 (Fig. 2) has been inserted and the gripping or retrieving devices 30 have returned to their normal position outside of the 45 shed. The filling 29 has been located in the filling looper 3i, and the looper is in position in the shed. The filling retrieving jaws 32 have been closed on the filling grasping the same and the inserting jaws (not shown) at the other side of 0 the shed or weave have also closed upon the filling grasping the same. This movement is accomplished by the proper design and timing of the cams (shown in my copending application,

Serial No. 235,044), which control the action of 55 Bracket I3 is held 3 the operating levers and the operating tubes disclosed in said copending application. As the lay moves further towards the front of the loom, the screw 10 contacts a portion of the moving lay, as indicated by dotted lines 33, Fig. 1. This causes lever 8 to rotate on its stud 6 against the tension of spring l2. As this motion takes place, the inner extended portions of the

blades

2 and 3 are forced open by the slotted yoke I4 moving inwardly, until the yoke is approximately at the center of the blade, near the stud 4. This action has caused the scissors to close at its outer end, cutting the filling 29, thus severing it from its position in the weave and freeing it from the jaws 32, whereupon the action of the looper device 3| takes place for turning the cut end of the filling into the warp upon the recession of the lay from front position. Now, if the scissors were allowed to remain in this position after cutting the filling, it would be struck by the reed and thus cause damage to said reed. To prevent this condition from existing, any further movement after the cutting has taken place causes the lever 5 and the whole cooperating mechanism to rotate on its lower stud 34 toward the front of the loom against the tension of spring 2!, out of position, thus causing the scissors to be moved away from the reed which is free to beat up the pick inserted without any interference from the scissors. This last rotation takes place because after the scissors are closed lever 8 cannot move any further and so the whole structure rotates around the center of the stud 34, as explained. Now, as the lay reverses, after having beaten up the filling, the spring 2!, which is under excessive ten sion, causes the whole mechanism to rotate back to the original position where it is stopped when the adjusting stop cam screw 28 contacts the extension 23 of lever 5. Further rearward movement of the lay causes the spring IE to withdraw or rotate the lever 8 to its original position where it is stopped by contact of the adjustable stop screw 18, contacting with said stop lug 23 that is integral with lever 5. It may be mentioned that spring 2| must be considerably stronger than spring l2 for successful operation of the mechanism. The mechanism is now back in its original position ready for the next pick and a repetition of operation as outlined.

It will therefore be seen that the present invention primarily involves bracket i3, primary lever 5 pivotally mounted on said bracket, auxiliary lever 8 pivotally mounted on said primary lever, scissors l pivotally mounted on the primary bracket 5, and means carried by the auxiliary lever for operating said scissors.

While I have described the preferred embodiment of my invention and have illustrated the same in the accompanying drawing, certain changes or alterations may appear to one skilled in the art to which this invention relates during the extensive manufacture of the same and I, therefore, reserve the right to make such changes or alterations as shall fairly fall within the scope of the appended claims.

What I claim is:

1. In a shuttleless loom, the combination with a support, of a bracket secured to said support, a primary lever pivotally mounted on said bracket, a scissors pivotally mounted on the upper end of said primary lever, an auxiliary lever pivotally mounted on said primary lever, a spring connected at one end to said auxiliary lever and at its other end to said bracket, said auxiliary lever provided at one end with a slotted yoke, portions of said scissors working in the slots of said yoke, means for swinging said auxiliary lever upon said primary lever for forcing said yoke lengthwise of said scissors for causing a cutting action thereof, and means for swinging said primary lever, to allow the device to clear itself when the reed advances to the beat up position.

2. In a shuttleless loom, the combination with a support, of a tationary bracket on said support, a long lever pivotally mounted on the outer end of said bracket, an angle lever pivotally mounted on said long lever above the outer end of said bracket, a scissors pivotally mounted on said long lever contiguous to said angle lever, and a yoke on said angle lever and bodily movable longitudinally of said scissors for controlling the cutting action thereof.

3. In a shuttleless loom, the combination with a support, of a bracket extending from said support, a primary lever pivotally mounted on the outer end of said bracket, said bracket provided near its outer end with a lug, said primary lever provided with an extension positioned contiguous to said lug, means on said lug for contacting said extension, said bracket provided with a finger, said primary lever provided with a finger, a

spring connecting the ends of said fingers, an

angle auxiliary lever pivotally mounted upon said primary lever intermediate its ends, said auxiliary lever provided near said primary lever with oppositely extending flanges or extensions, one of said extensions provided with adjustable means for engagement with a moving part of a loom, the other extension provided wth adjustable contact means, said primary lever provided with a lug in the path of movement of said adjustable contact means, a scissors pivotally mounted on the upper end of said primary lever, and said auxiliary lever provided on its upper end with a slotted yoke fitting upon the blades of said scissors.

4. In a weft cutting device, the combination with a support, of a scissors comprising blades, said blades pivotally mounted between their inner and outer ends upon said support, yoke means on the inner ends of said blades, and movable longitudinally of said blades, and means for imparting movement to said yoke means.

5. In a weft cutting device, the combination with a support, of a scissors comprising blades pivotally mounted on said support, a slotted yoke bodily-movable longitudinally of said blades, and means for moving said slotted yoke.

6. In a weft cutting device, the combination with a support, of a scissors comprising a pair of blades pivotally mounted on said support, a coil spring connected to said blades to one side of the pivot of said scissors, a yoke surrounding said blades contiguous to said coil spring, and being adapted to slide on the blades between the coil spring and the contiguous outer ends of the blades, and means for operating said yoke.

'7. In a weft cutting device, the combination with a support, of a two-blade scissors on said support, a yoke provided with a pair of slots, portions of said blades working in said slots, and means for sliding said yoke bodily back and forth on said blades.

WOODRUFF T. SULLIVAN.