US1966487A

US1966487A - Wound bobbin

Info

Publication number: US1966487A
Application number: US646401A
Authority: US
Inventors: Long Charles Frederick De
Original assignee: CLARK THREAD CO
Current assignee: CLARK THREAD CO
Priority date: 1932-12-09
Filing date: 1932-12-09
Publication date: 1934-07-17
Anticipated expiration: 1951-07-17

Description

C. F. DE LON WOUND BOBBIN Filed Dec. 9, 19

MZN N 0 TTO 5Y5.

Patented July 17, 1934 FFHQE WOUND BOBBIN Charles Frederick De Long, Mount Vernon, N. Y., assignor to The Clark Thread Company, Newark, N. J., a corporation of New Jersey Application December 9, 1932, Serial No. 646,401

Claims.

This application relates to a new and useful improvement in wound bobbin, the novel features of which will be best understood from the following description and the annexed drawing, in

5 which I have shown a selected embodiment of the invention and in which:

Fig. 1 is a vertical sectional view through a bob bin constructed according to my invention.

Fig. 2 is an enlarged view similar to Fig. 1, but

showing a different embodiment of the invention.

Fig. 3 is a bottom or top plan view of the bobbin appearing in Fig. 1.

Fig. 4 is an exploded view of the same bobbin.

The bobbin shown in Figs. 1, 3, and 4 comprises a core 1 which may be made of a short section of paper tubing, as is common in the art, and on this core is wound a mass 2 of thread, this mass being of the usual generally cylindrical form indicated. While this form may vary somewhat, it will, for the sake of convenience, be referred to as a cylindrical mass, and the ends of the mass are disposed in planes generally perpendicular to the axis of the core 1.

Bobbins of this type are sometimes mounted on spindles, either in or out of a casing, and the thread unwound, the bobbin rotating freely on the spindle, whereas in many instances the bob bin is merely placed within a casing from which it may be withdrawn. In Fig. 1, I have indicated by dot and dash lines a spindle 3 projecting upwardly from a horizontal surface 4, which may be the bottom of a casing containing the bobbin. It is often the case that a bobbin will unwind too rapidly, this being caused by the ease of rotation thereof which, in turn, causes the bobbin to continue rotating after the pull of the thread has ceased. In order to avoid this result, I have devised a means of retarding the movement of the bobbin by imposing a frictional drag thereon, in which I believe to be a novel manner. One construction which may be used to achieve this result is shown in the drawing and consists of disks 5 placed at either end of the core 1 and centered therein by means of centers 6 extending within the core for a short distance. Disposed adjacent the edge '7 of the wound mass of thread is a rim 8 preferably relatively narrow and connected to the center 6 by means of narrow spokes 9.

The mass of thread is first wound upon the core and then the disks forming the ends of the bobbin are preferably pressed into close engagement with the core and the mass. This pressure is usually provided by the use of flat dies, and ordinarily is sufficient to cause the mass to enter the openings 10 between the spokes and come into contact with the dies. Then the expansion of the thread mass at these openings will cause it to project outwardly beyond the outer surfaces of the disks, as indicated at 11 in Fig. 1. The disks may be made of metal or any other suitable material, and usually will form a comparatively small resistance to the rotation of the bobbin, whereas the thread projecting through the openings 10 provide a comparatively roughened surface offering a greater frictional drag than the material of the disks. The rim 8 will aid in the proper unwinding of the thread from the bobbin.

In Fig. 2 is shown a different embodiment of the invention, in this instance there being provided a sheet 12 of thin flexible material such as that sold under the name of Cellophane. This sheet may be perforated to receive the core 1, and is preferably of sufficient area to cover all the openings 10 in the adjacent end disk. When the disks are pressed into engagement with the thread mass and then that mass ex pands, the sheet will contact with the surface 4, as shown at 11, thereby protecting the thread from wear as the bobbin rotates. Of course it is understood that sheets 12 will normally be used with both of the end disks 5.

While I have shown the invention as embodied in a specific form, it is to be understood that various changes in details may be made without departing from the scope of the invention, and 35 I therefore do not intend to limit myself except by the appended claims.

I claim:

1. A Wound bobbin comprising a core having thread wound thereon to form a thread mass of cylindrical form, and a disk mounted on one end of said core and extending across one end of said cylindrical mass, said disk having openings therein through which said mass projects.

2. A wound bobbin comprising a core having thread wound thereon to form a thread mass of cylindrical form, and an end on said core extending across and pressed into tight engagement with one end of said cylindrical mass, said end having a narrow rim adjacent the edge of said mass and having openings therein through which the major portion of said end of the mass project.

3. A wound bobbin comprising a core having thread wound thereon toform a thread mass of cylindrical form, and a disk mounted on one end of said core and extending across one end of said cylindrical mass, said disk having openings therein and being pressed into tight en- 310 gagement with said mass to cause said mass to project into said openings.

4. A wound bobbin comprising a core having thread wound thereon to form a thread mass of cylindrical form, a narrow rim disposed on one end of said cylindrical mass adjacent the edge thereof, a center disposed within one end of said core, and spokes connecting said center to said rim, whereby the mass end may project between said spokes after they are pressed into contact therewith.

5. A wound bobbin comprising a core having thread wound thereon to form a thread mass of cylindrical form, a disk mounted on one end of said core and extending across one end of said cylindrical mass, and a sheet of thin flexible material disposed between said disk and the end of the mass, said disk having openings therein through which parts of said sheet project.

CHARLES FREDERICK DE LONG.