US2604909A - Thread guide device on a shuttle - Google Patents

Description

July 29, 1952 E. 'HONEGGER Y 2, 9

THREAD GUIDEDEVICE-ON A SHUTTLE Filed Jan. 13, 1950 Fix! ' ATTORNEYS- Patented July 29;, 1952 UNIT D STATES PAT ENT o FicE,

THREAD GUIDE DEVICE ON A SHUTTLE Ernst Honegger, Hinwil, Switzerland Application January 13, 1950, Serial No. 158,736

1 Claim. 1

This invention relates to a threading block for a weavers shuttle, the body of which is provided with a. channel that leads from the bobbin chamber of the shuttle to the outlet for the thread and said block has a U-shaped part with a guide for the thread being placed between the flanges of said U-shaped part.

The present threading block is characterized in that its thread guide is spirally wound, extended and is positioned so that the thread being drawn off from a full bobbin which is lodged in the bobbin chamber of the shuttle automatically moves into the guide without any manual help, and remains in said guide when the loom is put into operation.

The accompanying drawing shows an embodiment of the invention, by way of example, in which Fig. 1 is a top plan view of the present threading block;

Fig. 2 is a side elevation of the block as viewed from the left of Fig. 1;

Fig. 3 is a side elevation of the forepart of a shuttle with an upwardly open groove and an incorporated threading block as it is placed into the box of an automatic loom, with one bobbin filed;

Fig. 4 is a top view of Fig. 3.

The forepart of the shuttle body 2 is provided with a groove I which is open at the top and is formed with a channel 4 that leads from the bobbin chamber to the outlet 3 for the thread and into which a sheet metal threading block is positioned.

The threading block is for shuttles with an upwardly open groove and has a part 5 that is U- shaped in cross section, both flanges 6 and 1 of which have a hole 8 each for receiving a head screw 9 that serves for attaching the block to the shuttle. The head screw 9 is set through a bore l0 (Fig. 4) that crosses the channel 4. Bore In is enlarged at both ends for the countersunk disposition of the head of the head screw and of the nut. As soon as the device is set in the respective enlargement of channel 4, the stay of the U-shaped part 5 will lie on the bottom of said enlargement, so that the thread to be threaded r: can be introduced from outside between the two chamber, is bent outwardly to form an L-shaped leg provided by base l2 that lies parallel to the stay of the- U-shaped part 5, and a flange i3, which extends downwardly and lies parallel to the legs 6 and I being joined to said base I 2. Base l2 has on its outer end, that is turned away from the spiral-shaped guide II, a hook I4 which is bent inwardly and downwardly to the extension of the space between the two flanges 6 and 1.

The thread end that is drawn off from the bobbin which lies in the bobbin chamber is automatically threaded when the loom is set to work and no manual operation is needed. After the bobbin that is lodged in the shuttle has become idle, said bobbin is automatically interchanged with a new bobbin according to known procedure. The free thread end of the full bobbin is secured to the frame of the loom. The first weft with the full bobbin moves to the left of Figs. 3 and 4, so that the drawn-off thread becomes taut and is caused to lie in the spiral-shaped guide H as well as in the hook l4. Now the first weft is effectuated to the right, whereby the thread, that is guided along edge l5 of the base I2 and the joined edge [6 of the flange i3 and is led to an eye ll (Fig. 3) disposed on the free edge of the latter and is simultaneously laid into a slot [8 in flange i.

The above described threading block can be made of steel-sheet which is hardened after it has been worked and formed and is finally subjected to a surface treatment.

Tests made with a shuttle provided with the described threading block shows that a central thread guide is obtained with the spiral extended guide I i. Said central thread guiding eliminates the formation of loops and their fastening on the thread guide part such as occurs in other well known thread guide devices if the thread was not taut, so that by this invention'no interruptions will occur which are due to the formation of loop when the loom is in service.

Having now finally described and explained my said invention and in what manner the same is to be performed, I declare that what I claim is:

A one-piece threading block formed of sheet material for use in shuttles having a bobbin chamber and side thread delivery opening comprising a U-shaped portion formed by a bottom from which extend a pair of spaced upwardly extending parallel side walls providing a, longitudinally extending thread passage, a spiral guide extending from one of said walls longitudinally and centrally of said thread passage, a front wall bent from the forward end of said spiral guide carrying wall extending between the lower portion of said walls and against said base for maintaining said walls and base in their spaced relation and forming a central thread guiding member, an L-shaped leg extending laterally and forwardly from said guide supporting wall, the base of said L-shaped leg having a guide extending therefrom in line with said thread passage, the end of said second mentioned guide having a hook shaped configuration, the upright'arm of said L-shaped leg being substantially parallel to said pair of walls and having a thread guide slot formed in the end thereof and said pair of walls having an opening therethrough adjacent their base for receiving a shuttle connecting bolt.

ERNST HONEGGER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,334,683 Stimpson Mar. 23, 1920 1,649,618 Shaw Nov. 15, 1927 1,794,871 Sherman", Mar. 3, 1931 1,885,823 Hall Nov. 1, 1932 2,333,413 Daudelin et a1. Nov. 2, 1943 2,393,077 Villani Jan. 15, 1946

Images