US1356738A - Shuttle-checking and buffer device for looms - Google Patents

Description

R. RED MAN I. W. PARKINSON AND C. T. WALKER. SHUTTLE CHECKING AND BUFFER DEVICE FOR LOOMS. APPLICATION FILED OCT. I2I I918.

I Patented Oct. 26,1920.

2 SHEETSSHEET I.

R. REDMAN, J. W. PARKINSON AND C. T. WALKER. SHUTTLE CHECKING AND BUFFER DEVICE FOR LOOMS. APPLICATION FILED OCT. 12, 1918.

1,35 ,733, v v Patehted Oct. 26,1920.

2 SHEETSSHEET 2.

ii. S

, FEED STAT PTur ROBERT REDMAN AND JOHN WILLIAM PARKINSON, or onossHI'LLs, NEAR KEIGH- LEY, AND CHARLES TEMPES-I WALKER, OF ROUNDBAY, LEEDS, ENGLAND.

SHUTTLE-CHECKING AND BUFFER FOR LOOlVfS.

Specification of Letters Patent. Patentd flat- 26, 192(} Application filed October 12, 1918. Serial No. 257, 871.

T 0 all whom it may concern:

Be it known that we, ROBERT RnDuAN, J OHN WILLIAM PARKINSON, and CHARLES TnMrEs'r WVALK'ER, subjects of the King of Great Britain, and resident, respectively, of a2 Ryeland street, Crosshills, near 'Kei'ghley, 6 Aire street, Crosshills, aforesaid, and High Boyd, Davies avenue, Roundbay, Leeds,"all in the county .of York, England, have invented a certain new and useful Improvement in Shuttle-Checking and Buffer Devices for Looms, of which the following description, having reference to the accompanying drawings, is a specification.

It relates to means whereby the picker which actuates the shuttle in a loom is checked or arrested in its motion after propelling or transmitting motion to the shuttle in one direction, while it is similarly arrested after being movedin the opposite 'direction by the actions of the shuttle entering the shuttle box on its return. In the most common devices heretofore made use of, a considerable quantity of leather which is comparatively costly has been required while its resilience is quickly destroyed andtherefore it becomes ineffective. To avoid the employment of said comparatively large quantity of leather many devices have already been proposed among which resilient springs carried on rods and otherwise mounted to receive the shock of the picker, sometimes in one direction and sometimes in the other direction, have been mentioned.

Our present invention consists in the mounting of resilient. springs and their guiding spindle in such positions and by devices of such construction or formation as shall enable said springs to act more efficiently andwithout causing excessive twisting strains on the short leather straps which are used in conjunction with them, thus enabling said straps to withstand the strains put upon them for a greater period of time and in con unction w th said arrangement devices which will prevent the recoil of the buifer sprin'g which is situated at the outer end of the shuttle-box, from moving orforcing the picker into the shuttle box yet by which devices we may, after the picker has been again operated to throw the shuttle, release said spring to enablefit to actas a buffer on the return of the shuttle into the shuttle box.

of parts we use tion to a plain loom.

sition s and manner In carrying our invention into effect we Fries.

make use of the devices illustrated by the accompanying sheets of drawings to which reference is made in the following descrip- I tion Figure 1 is an end elevation of the rotary shuttle box and laysword of a loom to illustrate the application of our improved devices.

Fig. 2 is a plan of the devices shown by Fig. 1. Fig. 8 is a sectional. end elevation on line A. B. of the parts shown by Fig. 2 and as seen in the direction indicatedbythe'arrow a. v y

Figs. t and 5 are sectional end elevation and plan respectively of a modified form of our devices hereinafter described Figs. 6 and 7 are also plan and end elevation respectively of other devices that we may make use of for certain purposes here inafter explained.

Fig. 8 is'a' drawing in detail of'a part hereinafter described. i Fig. 9 shows a modification in the formation of the end'of a buffer strap used in connection with our improved devices.

Fig. 10 is a front elevation ofparts shown byFig.2.

Figs. 11 and 12 are front elevations of parts hereinafter described, the same being drawn to an enlarged scale. We have shown our improved devices as applied to the rotary shuttle box of a loom because the adaptation of picker checking mechanism to 'a'rotary shuttle box is more difficult of' achievement than is its adapta However our devices, be mounted in the pohereinafter described, may with equal facility and advantage, be applied to either class of shuttle box. (1 indicates the rotary shuttle box and H the laysword of the loom.

To attain the object of our invention the bar or spindle 2 upon which the buffer and checking springs 3 and 4 are mounted is supported by'bearings 5 and ,6 which may be formed integrally with the stud 7 of the picker-spindle 9 on the one hand and the framework 8 which supports the other'end of said picker spindle 9. Or these supports may be of the shape shown by Fig. lto 7 in which case, the bearing 5 which supports by being arranged to the end of the spindle 2 is detachable from p the stud 7 as well as being adjustably mounted by its fixing screw taking through a slot in an extension formed upon said stud 7. Or the bearing 5 may be entirely independent of the stud 7' and may be fixed directly upon the upper end of the lay sword H. The bearing 6 is supported by' another bearing 6 so that the two partsare both supported by theend frame 8 to which the part 6 is fixed as illustrated by Figs.

- g 6 and 7. In this casealso the adjustment of thespindle may be secured and its fixing in position maybe efiected'with a punching screw 11, such as the one shown by Fig. 3, at one end and the hoop and screw 12, l2 as shown by Figs. 1 and 2 on the other end.

When mounting the spindle 2 upon a plain loom the formation of the stud '2' would be the same as that above described that is to say, either as shown by F igs. 1, 2

and 3or as shown by Figs. 4 and 5 whereas the support 6 would be formed to extend from the ordinary plain shuttle-box endcasting or wouldbe shaped to be detachably vmounted thereon but by a -modification in 'shape as compared with that shown by 'riedby theoscillations of the slayboard.

.Between the springs 3 and 4 are mounted leather buffer and checking straps 13 and 14 which take over the spindles 2 and 9 by an opening being made through them at each of their extremities so. that by being of the length approximately as illustrated by Fig. 2 they may reach along the spindle 2 and in the opposite direction along the spindle 9 to permit the picker 15 to 'move its full stroke or the stroke necessary for throwing the shuttle, while at the same time springs 3 and 4 of considerable length may be used.

This lengthsof spring is desirable because the yielding of said springs by the force of the picker striking. against the leather straps 13 and 14 will in such case not be to such an extent as .will damage their resilience as would be the case provided said springs were shorter. Further than this the straps 13 and 14 are only bent in the direction illustrated by Fig. 2 while they are kept straight in the other direction, that is to say, no torsional or twisting strain is put upon them, hence their durability is greatly enhanced. The straps 13 and 14 may be of one thickness of leather, but we preferably have them formed of two or more thin layers stitched together instead of being in one thick piece.

To enable the straps 13 and 14 to slide freely over the spindle 2 we mount upon mounted upon them the straps 13 and 14 may be compressed between said nuts and the shoulders w, thus by cutting through the end of thestraps atg beyond the openings therein which take over the thimbles (as shown by Fig. 9) their attachment or detachment from the thimbles and thespindle may be readily efiected.

In order to meet the requirements 01 a heavier or lighter blow of the picker upon the straps 13 and 14, the springs 3. and 4 may be adjusted in varied positions along the spindle 2 by adjusting their hoops 18 and 19 (which are secured upon said spindle 2 by set screws) as will be understood;

while in most cases the spring 3 ismade considerably stronger than the spring 4.

It has been .found that on the recoil of the spring 4 the picker 15 (after the shuttle has forced it to compress said spring) is moved back into the shuttle boxG and therefore renders the use of this "spring 4 for practical purposes impossible, but to prevent said spring '4 from thusrecoiling we mount a catch lever 20 upon a bracket 21 fixed upon the spindle 2. V

This lever 20 is'pivoted at20, Fig. 11, and acts un derthe pressure of the-spring 23 which always tends to force same into its normalposition which is that shown by the drawings. In this'normal position the outer end of the lever 20 lies in the path of the part 14 of the strap 14 which takes over the spindle 2, so that on the shuttle entering the shuttle box and forcing the picker 15 against the strap 14 to compress the spring 4, said strap .14 will have its outer end 14*. moved beyond the end of the lever 20 as shown by Figs. wand 11; 'On the strap 14 moving over the upper surface-of the lever 20 to reach the outer end of same as stated, said lever is made to oscillate upon its fulcrum 20 against the pressure of its spring 23. When the strap 14 has moved beyond the lever 20, the recoil of the spring 23 brings it into the position hereinbefore described, so that it will thus retain the strap 14 and its spring 4. j

When the picker 15 is next moved forward to throw the shuttle, as itapproaches the extent of its motion it encounters. the strap 13 andfthis latter'is coupledbya projection on its thimble 16 and a short strap 24 to the pendent arm'20 of the lever 20. The motion thus given to the strap 13 that its outer end is removed from retaining the strap 14 and spring 4, hence these latter are permitted to assume their advanced positions ready to act as means for checking the picker 15 When it next returns.

Instead of the lever 20 being employed We may have a sliding piece (see Fig. 12) actuated by a lever 26 to which the strap 24: is secured. In this case the spring 23* is mounted beneath the sliding piece 25 While by the inner end 25 of same taking against the bracket 21 it is held against rotation.

Such being the nature and object of our said invention, What We claim is 1. In shuttle checking and buffer devices for looms, a picker spindle, an additional spindle, tWo checking springs mounted on said spindle, leather straps mounted upon said spindles and intervening between the springs, catch devices for retaining the checking spring and means for disengaging.

said catch devices.

2. In shuttle checking and buffer devices for looms, a picker spindle, an additional spindle, tWo springs mounted on said spindle, leather straps mounted upon said spindles and intervening between the springs, catch devices for retaining one of the springs When compressed, and coupling means for connecting said catch devices to the buffer strap.

3. In shuttle checking and bufier device v ,7

for looms, a picker spindle, an additional spindle, tWo springs. mounted on said latter spindle, leather straps mounted upon said spindles, a pivoted lever, a sliding catch piece and a spring for acting upon said sliding piece.

ROBERT REDMAN.

JOHN WILLIAM PARKINSON.

CHARLES TEMPEST' WVALKER.

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