US805751A - Loom. - Google Patents

Description

PATENTED NOV. 28, 1905.

C. RENGER.

LOOM.

APPLICATION FILED PEB. 23,1905.

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O. RENGER.

LOOM. APPLICATION FILED FEB. 23,1905.

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MPLIOATION FILED PEB. 23,1905.

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UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented Nov. 28, 1905.

Application filed February 23, 1905. Serial N0. 246,931.

To alt whom, it may concern:

Be it known that I, CARL RENGER, a subject of the King of Saxony, residing at 77 2 Caixa de Correio, Rio de Janeiro, in the Republic of Brazil, have invented new and useful Improvements in and Relating' to Looms, of which the following is a specification.

My invention relates to improvements in looms having stationary bobbins of weftthread and gripper shuttles, and more especially to a device for imparting motion to the hook or catch'for the weft-loop shot in. In looms of this kind wherein the introduced weft-loop slipping off the gripper is caught up by a catching-needle arranged to move transversely to the same and is held until the lathe beats it up the catching-needle in the devices heretofore used for the purpose is placed in the receiving position by a spring which in the beating of the lathe is putin tension while the catching-needle is drawn back and is released by the shuttle entering the corresponding shuttle-box. Accordingly the shuttle serves only for releasing the catching-needle forced by elasticity into the operative position. Now according to my said invention the movement of the shuttle itself is utilized for the positive forward and backward movement of the catching-needle. This is rendered possible by the movement of the hook or catch to the receiving position and also the backward movement of the same being eifected by positive motion through the intervention of a movable stop combined with it, the movement of the said stop being limited by the shuttle moving to and fro.

In the constructional form represented in the accompanying drawings the gripper-shuttle is furnished with a reversible two-armed gripper, the movable stop serving also for reversing such gripper.

Figures 1 to 4 are plan views showing the improved device in different positions. Fig. 5 is a front elevation of the device. Fig. 6 is a section on the line A B of Fig. 5. Fig. 7 is a section on the line C D of Fig. 5. Fig. 8 is a side view of a detail. Fig. 9 is a front view of this detail. Fig. 10 is a section on the line E F of Fig. 9. Fig. 11 is a front view of the device applied to a loom.

The gripper 2, reversed by the shuttle 35, is adapted to turn upon a bolt or pivot 36, arranged vertically in the middle ofthe shuttle. The hook orcateh 3, which serves for holding the weft-loop S shot in and slipping from the reversed gripper 2 is secured, for instance, to a slide 4, fitted to be moved in a suitable prismatic guide 5 transversely to the shuttle-race 6.

For displacing the hook or catch 2 to its receiving position and from the same by the shuttle use is made in the constructional example of a two-armed rocking lever 8 9, arranged to turn upon a fixed vertical bolt or pivot 7, one arm 8 of the said lever engaging the slide 4, and a pin 10 at the end of a lever 12, which is adapted to turn upon a fixed bolt or pivot 11, engaging with a slot in the other arm 9. The arm 12 has a stop 13 for a lever 14, furnished with a nose 15, which at the end of the turning movement of the lever carries away the lever 12, through the agency ofthe shuttle entering the shed. Moreover, the lever 14 is connected with the lever 12 by a weak spring 0 in such a manner that the former lever is normally pulled against the stop 13. On the passage of the shuttle from the shed, Fig. 1, the stop 17, reaching into its path and provided on the lever 14, iitted to turn about the fixed vertical bolt or pivot 11, is carried away a certain distance by the gripper 2 till the movement of the lever 14 in this direction is limited by a fixed stop 18, Fig. 2. Through the stop 13 the partial movement of the lever 14 causes a corresponding turning movement of the lever 12 and of the rocking lever 8 9, thereby moving the slide 4, with the hook or catch 3, forward to the receiving position, Fig. 2. In the continued movement of the shuttle the gripper 2 is reversed on the stop 17.

The gripper 2 of the shuttle 35 has two parallel prongs and presents on the other side of its pivot 36 two fiat abutting faces 19, directed at right angles to each other for a stopspring 20, which has for its object to secure the gripper 2 in its respective operative positions. When the stop 17, by which the gripper 2 is reversed, bears firmly upon the stop 18, the gripper will be turned in the continued movement of the shuttle. By this means the weftloop S just shot in is released and caught up by the hook or catch 3, Fig. 3. The weft-loop is drawn partly byits own tension, partly by a specially-provided tension device hereinafter described, and is thrown from the hook or catch 3 in the following beating action of the lathe. The hook or catch is moved back to its position of rest as the shuttle passes from the shuttle-box into the shed, the reversed IOO gripper 2, which has already taken hold of the new weft-loop, carrying away the stop 17 with its arm 14 in the opposite direction, as before. At the end of the turning movement of the lever 14 the nose 15 of this lever carries away the lever 12, which in its turn causes the' rocking lever 8 9 to be swung back in order to retract the slide 4 with the hook or catch 3, Fig. 4. Then the spring 16 brings the arm 1'4 with the stop 17 again to the position shown in Fig. 1.

As shown in Figs. 5 and 6, the shuttle has at the side turned to the front a continuous groove 21 for safely guiding the weft-loop and preventing too great swinging movements, such as would be liable to cause the same to jump out of the gripper-hook. 'A groove 22 in the rear side of the front wall of the shuttle-box constitutes the path for the gripper 2 and is bridged over by the thread drawn through a iixed eye 23 and running to the fabric, which thread slips down by its tension on the rear side of the front wall of the shuttle-box, the said rear side being downwardly inclined at the fore end, Fig. 7. Thus the gripper 2 can securely seize the thread lying free above the groove 22. The device for putting the weft-th read in tension relaxes this thread on the stroke of the shuttle to obviate breakage of the same, and after the weft has been shot in draws back again the loop pulled through too far. This device is represented by itself in Figs. 8 to 10.

On an adjustable bar 24 a thread-guide lever 25 is arranged to turn upon a fixed pivot 27 in the direction of the pull of the thread in opposition to the power of a spring, such as a torsion-spring 26. At the free end of the thread-guide lever an eye 28 is provided for guiding the thread, which also passes through two eyes 29 and 30, secured at the upper and lower parts of the adjustable bar 24. Normally the thread-guide lever 25 is forced by the spring 26 to the position indicated in dotted lines, Fig. 9, and yields to any sudden or increasing and decreasing tension of the thread in the weaving, inasmuch as' it swings between the positions indicated by dotted and full lines. It is expedient to limit the swinging movement in the direction of the action of the spring by an adjustable stop 31 on the said bar 24 in order to enable the action to be regulated according to exigencies. By a projection 32 the thread-guide lever 25, moreover, acts upon a spring-clamp 33 34, designed for exerting a break action on the thread and arranged below the eye 29, the said projection entering the said clamp and opening the same as soon as it passes to the position indicated in full lines, Fig. 9, while it leaves the clamp on swinging outward in the direction wherein the spring exerts its action-that is to say, on the slackening and cessation of the tension of the thread-so that the clamp will be closed in consequence of the spring action to prevent the thread from running on and form the consequent relaxing.

The tension device is secured to the board 37 of the lathe 38 of the loom at the entrance of the shuttle-box 39, Fig. 11. Above the same I provide the bobbin 41 of weft-thread upon a vertical spindle 40, likewise fixed to the lathe-board 37. Fig. 11 shows the shuttle 35 passing from right to left, the thread.- guide lever of the tension device being pulled on the right-hand side, because it follows the pull of the thread by the shuttle 35, thus yielding to the same. On the left-hand side of the loom the thread-guide lever of the tension device is in the position of rest, into which it has been forced by the torsion-spring.

l/Vhat I clairn as my invention, and desire to secure by Letters Patent, is-

1. In a loom of the character described, the combination, with the shuttle, the reversible gripper provided in the same, and the catch for the weft-loop shot in, of a stop adapted to receive a limited movement from the gripper and to impart to the said catch a positive toand-fro movement, substantially as herein set forth.

2. In a loom of the character described, the combination, with the shuttle, the reversible gripper provided in the same, and the catch for the weft-loopshot in, of astop adapted to receive a limited movement from the said gripper and to impart to the catch a positive toand-fro movement, and a iixed stop adapted to limit the movement of the movable stop and to reverse the gripper of the shuttle on the passage of the same, substantially as herein set forth.

3. In a loom of the character described, the combination, with the shuttle, the reversible gripper provided in the same, and the catch for the weft-loop shot in, of a stop adapted to receive a limited movement from the gripper and to impart to the catch a positive to-andfro movement, a fixed stop adapted to limit the movement of the movable stop and to reverse the gripper of the shuttle on the passage of the same, a fixed pivot, a lever arranged to turn upon this pivot, the said lever carrying the aforesaid movable stop at its free end and another stop at its pivoted end, a second lever arranged to turn upon the said pivot and having a stop at its pivoted end, the said two levers being connected by aspring, a iixed pivot, a rocking lever arranged to turn upon this pivot, one arm of the rocking lever being yieldingly connected with the second lever and the other arm engaging the movable catch, substantially as herein set forth.

4. In a loom of the character described, the combination, with the shuttle, the reversible gripper provided in the same, and the catch for the weft-loop shot in, of a stop adapted to IOO receive a limited movement from the gripper and to impart to the said catch a positive toand-fro movement, a vertical spindle for carrying a bobbin of weft-thread, two fixed eyes for guiding the weft-thread.l a movable eye, a lever carrying this eye, a pivot for the said lever, a spring tending to pull the movable eye out of the path of the weft-thread, and an adjustable stop for the aforesaid lever, substantially as herein set forth.

5. In a loom of the character described, the combination, with the shuttle, the reversible gripper provided in the same, and the catch for the weft-thread shot in, of a stop adapted to receive a limited movement from the gripper and to impart to the said catch a positive to-and-fro movement, a vertical spindle for carrying a bobbn of weft-thread, two fixed eyes for guiding the weft-thread, a movable eye, a lever carrying' this eye, a pivot for the said lever, a spring tending to pull the movable eye out of the path of the weft-thread, an adjustable stop for the aforesaid lever, a spring-clamp arranged between the two fixed eyes, and a projection provided on the eyecarrying lever and adapted to pass into the said clamp for opening the same, substantially as herein set forth.

6. In a loom of the character described, the combination of the shuttle, the reversible gripper provided in the same, this gripper having two Hat faces extending at the right angle to each other and two parallel prongs, a spring adapted to bear against either of the fiat faces of the gripper, the catch of the weft-loopshot in, and a stop adapted to receive a limited movement from the gripper and to impart to (the said catch a positive to-and-fro movement,

substantially as herein set forth.

7. In a loom of the character described, the combination of the shuttle having a longitudinal groove in its front side. the reversible gripper provided in the shuttle, this gripper having two flat faces extending at a right angle to each other and two parallel prongs, a spring adapted to bear against either of the flat faces of the gripper, the catch for the weftloop shot in, and a stop adapted to receive a limited movement from the gripper and to impart to the said catch a positive to-and-fro movement, substantially as herein set forth.

8. In a loom of the character described, the combination of the shuttle having a longitudinal groove in its front side, the reversible gripper provided in the same, theshuttle-box having in its front wall a longitudinal groove designed for the passage of the gripper, the said front wall being forwardly inclined at its fore end, the catch for the weft-loop shot in, and a stop adapted to receive a limited movement from the gripper and to im part to the said catch a positive to-and-fro movement, substantially as herein set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CARL REN GER.

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