US1666443A - Shuttle-tension-controlling mechanism for looms - Google Patents

Description

April 17, 1928. 1,666,443

- c. H. DRAPER SHUTTLE TENSION CONTROLLING MECHANISM FOR LOOMS Filed Dec. 18, 1925 F I5 4 4g Patented Apr. 17, 1928.

UNITED STATES PATENT OFFICE-q CLARE H. DRAPER, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGN- MENTS, T DRAPE-R CORPORATION, 813 HOPEDALE, MASSACHUSETTS, A CORPORA:

TION OF MAINE.

SHUTTLE-TENSION-CONTROLLING MECHANISM FOR LOOMS.

Application filed December 18, 1925. Serial No. 76,204.

' The present invention relates to an improvement in .shuttle tension controlling mechanism for looms.

The present construction is an improvement on the construction of the patent to Draper & Northrop, No. 1,556,207, dated October 6, 1925. The invention consists in the construction hereinafter described and par ticularly defined in the claims.

Inthe accompanying drawings illustrating the preferred form of the invention,

Fig. 1 is a sectional elevation of the lay and associated parts; Fig. 2 is a detail showing the inertia arm and its connection with the dagger shaft; and Fig. 3 is a section taken on the line 33, Fig. 2.

. The illustrated embodiment of the invention is described as followszThe lay is supported on the swords 11, provided with the shuttle box 12, adapted to receive a shuttle. The shuttle binder 14 isv of the usual form, and is activated by the binder fingers 15 to cause pressure to be exerted upon the shuttle in the box. The shuttle 5 fingers are mounted on the arms 16 of the vdagger shaft 17, mounted in brackets on the lay in the usual manner and encircled by a coil spring operatlng to tend to turn the shaft in the direction to depress the dagger as is usual. The dagger 18 is carried by the dagger shaft 17, and adapted to engage the steel 19 of the frog 20 in the usual manner. A11 inertia arm 21 is loosely mounted on the dagger shaft 17, as shown in Fig. 2, and carries the weight 22 secured to it. The hub 23 of the inertia arm is held from move ment to the left, as viewed in Fig. 2, by

means of the collar 24, which is'secured on the dagger shaft 17. Movement in the opposite direction to the right, as viewed in Fig. 2, is prevented by the collar 25, which is secured on the dagger shaft 17 by a set screw. The collar 25 is provided with the dagger stop 26, adapted to engage the plate 27 on the under side of the lay 10, for'the purpose of preventing overthrow of the dagger, as is usual. I a

In the construction illustrated in said patent, the movements of the dagger shaft, binder fingers and associated parts are controlled by their weight,the binder shaft spring, and the weight of the inertia arm, as described therein, but during the first part of the forward movement of the lay the binders were, in addition, urged inward by the inertia arm, with the result that the arm and is adapted to engage the lay, as

shown in Fig. 1, thereby preventing it from urging the binder fingers inwardly during the first part of the forward movement of the lay. e

Connections between the inertia arm and the dagger shaft permit a slight oscillatory motion of the inertia arm on the dagger shaft by reason of the fact that the sleeve 25 and the hub 23 have interlocking portions, as shown in Fig. 2. That is to say, the upper half of the right hand end ofthe hub 23 of the inertia arm is cut away to receive the interlocking extension 29 of the sleeve 25, andthe lower right hand portion 30 of the hub 28 constitutes an extension which is received in what may be termed for convenience, the cut-away portion of the sleeve 25. By reference to Fig. 3 it will be seen that the extension 29 andthe extension 30 afford a permissible, free movement of the inertia arm with respect to the dagger shaft of about 30. Connected to the extension 29 by a broken line is shown the binder finger 15, which parts are rigidly connected together, as the dagger sleeve 25 is rigidly secured to the dagger shaft, which rigidly carries the dagger finger. Similarly the extension 30 is shown as connected by a broken linewith the inertia arm 21 to which it is rigidly attached, being made'integral therewith, and the stop '28 is also shown as connected by a broken line with the extension 30, with which extension it is integrallyformed. It is also shown in engagement with the lay 10.

The operation of the mechanism of this application is identical with the operation of the mechanism of the said patent, with the exception that during the first part of the forward movement of the lay' from back center, as it starts to move forward from back center and until the shuttle is received in the box, the action of the inertia arm on front position and starting on itsbackward movement, rearward motion is imparted to the, inertia arm by the lay, but the inertia of the weight 22 causes said weight to take up the accelerating rearward movement of the lay more slowly than the lay itself, with the result that the weight 22 and lay will have relative movement and effect relief of pressure of the dagger fingers on the hind ers during part of the lay rearward movement or until the lay has reached about top centre. Since the shuttle is picked at about top centre, the binder pressure on the shuttle is thus released at the picking point. As the lay passes back centre and starts frontwardly its movement is accelerated until bottom centre is reached and is then gradually diminished until the lay reaches front centre where itsmovement is arrested, and since the inertia arm and weight are carried by the lay, thestop 28 engages the lay asthe latter starts frontward, and as front centre is reached by the lay with gradually diminishing velocity until it comes to rest, the inertia of the inertia arm and weight effects relief of binder pressure as the lay reaches front centre and therefore at the time of bobbin transfer which is effected at substantially this point in the. lay movement.

When the lay is at back center, as indirated by Figs. 1 and 3, the stop 28 of the inertia arm engages the lay, as shown, and such engagement continues as the lay moves frontwardly, and since the face 31 of the inertia arm hub 30 does not press upon the face 32 of the extension 29 of the dagger sleeve because of the engagement of the stop 28 with the lay, the inertia arm .is prevented from acting through the dagger sleeve or dagger rod during frontward movement of the lay, but as the lay slows down and finally stops at front position, while the inertia arm cont nues under ts inertia to swing frontwardly,the gap shown at the r ght of Fig. 3

is closed and the inertia arm then acts through the extension 29 of the dagger sleeve to relieve the binder pressure.

Having thus described the invention, what is claimed is: V v r 1.- Shuttle box tension controlling mechanism for weft replenishing looms of the bobbin changing type having, in combination, a lay, a shuttle, a binder, a spring actuated provided with a weight below the dagger rod,

and means for preventing the inertia arm and weight from acting on the binders during shuttle boxing.

2. Shuttle box tension controlling mechanism for weft replenishing looms of the bobbin changing type having, in combination, a lay, a shuttle box, a binder for the shuttle box, and inertia controlled tension applying means for applying pressure to the binders acting to decrease the binder pressure during picking, and to remain inactive during boxing of the shuttle.

3. Shuttle box tension controlling mechanism for weft replenishing looms of the bobbin changing type having, in combination, a lay, a shuttle box, a binder for the shuttle box, and inertia controlled tension applying means acting to decrease the binder pressure during transfer and inactive to vary the binder pressure during boxing of the shuttle.

bin changing type having, in combination, a

lay, a shuttle box, a binder, and inertia controlled tension applying means having provision for preventing increase of pressure on the binders during the forward movement of the lay.

6. Shuttle box tension controlling mechanism for weft replenishing looms of the bob- 1 bin changing type having, 111 combination, a

lay, a shuttle box, a binder, andinertia controlled tension applying means having provision for decreasing the tension of the binder on the shuttle during rearward movement of the lay, and preventing it from acting on the binders during forward movements of the lay.

7. Shuttle box tension controlling mechanism for weft replenishing looms of the bobbin changing type having, in combination, a lay, a shuttle box, a binder, a dagger rod on the lay, binder fingers on the dagger rod, an

inertia arm on the dagger rod provided with a weight below the dagger rod, and a stop for preventing the inertia arm from acting on the dagger rod during forward move ments of the lay.

In testimony whereof I have signed my name to this specification.

onann H. nears n.

Images