US2829676A

US2829676A - Shuttle for ribbon looms

Info

Publication number: US2829676A
Application number: US580917A
Authority: US
Inventors: Wiget Georg
Original assignee: Adolph Saurer AG
Current assignee: Saurer AG
Priority date: 1955-06-22
Filing date: 1956-04-26
Publication date: 1958-04-08
Anticipated expiration: 1975-04-08

Description

April "8, 1958 s. WIGET 76 SHUTTLE FOR RIBBON LOOMS Filed April 26, 1956 INVENTOR. 7

United States Patent 6 SHUTTLE FOR RIBBON LOOMS Georg Wiget, Arbon, Switzerland, assignor to Adolph Saurer Ltd., Arbon, Switzerland Application April 26, 1956, Serial No. 580,917 Claims priority, application Switzerland June 22, 1955 8 Claims. (Cl. 139-498) This invention relates to looms, and more particularly to shuttles for ribbon looms wherein bobbins cylindrically wound up on carriers and wound off outside the shuttles, are employed.

It is an object of the invention to provide novel shuttles of the above-noted kind whereby to materially simplify and shorten the procedure for replacing bobbins.

Other objects, and the manner in which the same are attained, will become apparent as this specification proceeds.

Up to now, bobbins usually were placed on spindles for free rotation inside the shuttles, and special braking de vices had to be provided through which the thread had to pass. The complexity of this construction, and the cumbersome and time consuming procedure of drawing the thread into the braking devices, were serious drawbacks which are entirely eliminated by the present invention.

The invention contemplates a shuttle comprising two plane faces joined at an angle of at least about 90, and a spring cover designed to force a bobbin, on insertion in the shuttle, against the two plane faces so that as the diameter of the bobbin decreases, the axis of the bobbin, which extends parallel to the two plane faces, moves in the plane bisecting the angle formed by the two plane faces, toward the zenithal line of this angle, whereby the friction generated in the lines of contact of the mantle of the bobbin with the two plane faces and the cover, determines the tension of the thread.

An advantageous elaboration on this basic concept of the invention, provides on the shuttle an eyelet for withdrawal of the thread which extends in the line of intersection of the two angularly displaced plane faces, at least approximately over the entire wound up length of the bobbin; a slit is provided at one end of this eyelet, for threading purposes.

In the drawing accompanying this application and forming part thereof, one embodiment of the invention is illustrated diagrammatically by way of example.

In the drawing:

Fig. 1 is a front view of a shuttle according to the invention, with a bobbin inserted therein;

Fig. 2 is a side view of the shuttle (seen from the left in Fig. l), and

Fig. 3 is a section along line III-III in Fig. 1.

Referring now to the drawing wherein like elements are denoted by identical reference numerals, the shuttle 1 includes two

plane faces

2 and 3 extending at right angles with respect to one another, and two parallel guide faces 4 and 5 extending at right angles relative to

faces

2 and 3. The face 3 ends in a rounded portion 6. The central part of face 2 extends, at an angle, to an end portion 7. A longitudinal slot 8 accessible, from the left in Fig. 1, through the threading slit 9, extends in the line of intersection of

plane faces

2 and 3. The cover 10 is pivotally mounted, by means of a pin 12, in the two guide faces 4 and 5. The spring 14 tends to turn the cover 10 clockwise.

2,829,6lb Patented Apr. 8, 1958 ICC portion 6 from where it passes to the place of consumption.

As the diameter of the bobbin decreases, the axis 17 of the carrier 13 for the bobbin 15 moves in the plane bisecting the angle formed by the two plane faces 2 and 3, toward the zenithal line, or apex, of the angle, a path indicated by the arrow in Fig. 3, and leading to the terminal position of the carrier 18 indicated in a dot and dash line in Fig. 3.

In accordance with the basic concept of the invention, the tensioning of thread 16 is determined by the friction between bobbin 15 and the plane faces 2 and 3, and the cover 10. This eliminates the necessity of providing any accessory braking mechanism for the thread, and simplifies and expedites the exchange of bobbin in the shuttle.

I wish it to be understood that I do not desire to be limited to the exact details of construction, design and operation shown and described as certain modifications Well within the scope of the claims following herein, may suggest themselves to workers in this field which would involve no departure from the spirit of the invention nor any sacrifice of the advantages thereof.

I claim:

1. A shuttle for ribbon looms comprising a bottom, a rear wall forming an angle of at least about with said bottom, plane faces on said bottom and said rear wall, means for forcing a bobbin into contact with said plane faces whereby to move the axis of said bobbin toward the apex of said angle as the diameter of said bobbin decreases, and means for passing the thread issuing from the circumference of said bobbin outside said shuttle.

2. A shuttle for ribbon looms comprising a bottom, a rear wall forming an angle of at least about 90 with said bottom, plane faces on Said bottom and said rear wall, a spring loaded cover arranged to force a bobbin into contact with said plane faces whereby to move the axis of said bobbin toward the apex of said angle as the diameter of said bobbin decreases, and means for passing the thread issuing from the circumference of said bobbin outside said shuttle.

3. A shuttle for ribbon looms comprising a bottom, a rear wall forming an angle of at least about 90 with said bottom, plane faces on said bottom and said rear wall, means for forcing a bobbin into contact with said plane faces whereby to move the axis of said bobbin toward the apex of said angle as the diameter of said bobbin decreases, and a longitudinal slot extending along the zenithal line of said angle over a length corresponding substantially to the wound-up length of the bobbin, for passing the thread issuing from the circumference of said bobbin outside said shuttle.

4. A shuttle for ribbon looms comprising a bottom, a rear wall forming an angle of at least about 90 with said bottom, plane faces on said bottom and said rear wall, side walls parallel to one another and perpendicular to said bottom and said rear wall, adapted to serve as guide faces for the top and bottom, respectively, of a bobbin inserted therebetween, means for forcing said bobbin into contact with said plane faces whereby to move the axis of said bobbin toward the apex of said angle as the diameter of said bobbin decreases, and means.

for passing the thread issuing from the circumference of said bobbin outside said shuttle.

5. A shuttle for ribbon looms comprising a bottom, a rear wall forming an angle of at least about 90 with said bottom, plane faces on said bottom and said rear wall, means for forcing a bobbin into contact with said plane faces whereby to move the axis of said bobbin toward the apex of said angle as the diameter of said bobbin decreases, a longitudinal slot extending along the zenithal line of said angle over a length corresponding substantially to the Wound-up length of the bobbin, for passing the thread issuing from the circumference of said bobbin outside said shuttle, and a rounded extension at the top of said rear wall across which to guide the thread emerging from said longitudinal slot.

6. A shuttle for ribbon looms comprising a bottom, a rear Wall forming an angle of at least about 90 with Sa bottom, plane faces on said bottom and said rear wall, means for forcing a bobbin into contact with said plane faces whereby to. move the axis of said bobbin toward the apex of said angle as the diameter of said bobbin decreases, a longitudinal slot extending along the zenithal line of said angle over a length corresponding substantially to the wound-up length of the bobbin for passing the thread issuing from the circumference of said bobbin outside said, shuttle, and a slit at one end of said longitudinal, slot whereby to facilitate threading.

7. A shuttle for ribbon looms comprising a bottom,v

a rear wall forming an angle of at least about 90 with said bottom, plane faces on said bottom and said rear Wall, an upwardly bent extension of the central part of said bottom, means for forcing a bobbin into contact with said plane faces whereby to move the axis of said bobbin toward the apex of said angle as the diameter of said bobbin decreases, and means for passing the thread issuing from the circumference of said bobbin outside said shuttle.

8. A shuttle for ribbon looms comprising in combination, a bottom, a rear wall forming an angle of at least about 90 with said bottom, plane faces on said bottom and said rear wall, parallel side walls arranged perpendicular to said bottom and said rear wall, a spring-loaded cover mounted for pivotal displacement relative to said side walls, an upwardly bent extension of the central part of said bottom, a rounded extension at the top of said rear wall, and a longitudinal slot extending along the zenithal line of the angle formed by the bottom and the rear wall over a length corresponding substantially to the wound-up length of a bobbin, whereby on insertion of a bobbin into the shuttle, said cover forces the bobbin into frictional contact with said plane faces thus controlling the tension on the thread, said thread emerging from said longitudinal slot to pass across the exterior of said rear wall and the rounded terminal portion thereof.

No references cited.