DE27186C - Apparatus for making insulated electrical lead wires - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

CLASS 21: Electrical apparatus.

Apparatus for making insulated electrical lead wires.

Patented in the German Empire on February 2, 1883.

The purpose of the invention is to provide wires for electrical lines with an insulating To cover the cover made of water glass or real glass in connection with other materials while maintaining their flexibility.

Various baths and their composition are used in the manufacture of this coating is sent ahead here for the sake of simplicity.

Bad A:
Rubber elasticum

Glass powder

Coal powder ....

paraffin

Silver or mica sand
Naphtha

Bad B:

40 parts by weight,

IS

15th

15th

10

Paper or wood pulp. 50 parts by weight,

Felt, cotton or the like 50

dissolved rubber elasticum 40

Glass powder 10

The core of the line is a smooth, round or flat or corrugated or twisted one Wire made of a suitable material, copper, iron, etc., which, brought into bath A, with a coating of wood fiber, glass powder or the like soaked with water glass Material is provided by pulling the wire through a funnel-shaped mouthpiece, during which time those materials are supplied in the appropriate quantity and around the Wire to be pressed. A corrugated or twisted shape of the wire promotes retention of the materials. Instead of bringing the wire into the bath A, let him while he runs through the mouthpiece, a liquid corresponding to bath A can be supplied to to unite the materials covering it even better.

Or the wire first runs through a number of paper, cardboard, paper mache, etc. disks soaked in water glass; then once or several times, depending on the required thickness of the coating, through bath A and finally onto a spool. From this it goes through a heated tube b, Fig. Ι to soften the surface of the coating, and through a stamen (not shown in the drawing), which contains powdered glass, soapstone, asbestos, slag wool, cotton or the like, so that these materials cling to the softened surface. In this state the wire now runs between the rollers cc, the cylindrical surface of which is provided with semicircular or otherwise suitably shaped depressions, whereby the entire coating is compressed and divided into approximately pearl-shaped sections. This gives the wire the necessary flexibility.

The procedure can also be changed in such a way that the wire is first passed through water glass, then passed through bath A and then wrapped spirally with wood pulp, etc.

Claims (1)

Or the material intended for the cover is passed through a round opening in a suitable width at the same time as the wire, so that it is wrapped around the wire. The wire wrapped in one way or another goes through the water glass and the bath A, then through the heating cylinder b and the stamen and is finally made ready by the rollers cc, as already explained. Another variant of the method consists in first bringing the wire, especially the corrugated one, into bath B, then running it through water so that the turns do not stick together, and then bringing it onto the coil α. From there it goes through the bath A, the heating cylinder b, the stamen and between the rollers cc. The wire can also be covered with spun glass or slag wool by wrapping these substances around the wire, or by wrapping the latter in a bipartite form with glass thread or slag wool. The holding together of the fibers is effected by wetting them with a solution of camphor, resin, etc. in equal parts of linseed oil before they are introduced into the mold. The wire is then exposed to a strong flame or passed through a strongly heated cylinder so that any resin solution used burns away and the glass melts. Instead of this manipulation, the wire can also be pulled through molten glass. The wire, provided with a layer of melting, either goes directly through the rollers cc or it can first be brought into the bath A, the heating cylinder b and the stamen. Another variant of the process consists in bringing the wire into bath A. and then glass beads or the like are strung close together on it. It now goes through the heating cylinder, so that the blanket from the bath melts and bind the pearls firmly with the wire and among each other. The two-part mold d, lined with vulcanized rubber d ¹ , is used to carry out this process, FIGS. 2 and 3. The glass beads are lined up on a pin, placed in the mold, and the latter closed so that the beads lie firmly in place. After removing the pin, the wire is pushed through. Of course, even using many forms, this type of work is very slow and time consuming. Instead of using beads, you can slide glass tubes onto the wire, heat the wire, and then quickly immerse it in water, causing the glass tubes to crack into ring-shaped pieces. Now the wire is brought into the bath A, the heating cylinder 6, the stamen and the rollers cc . * ■ /
P ATENT claim: The apparatus described, which consists of the coil a, the heating cylinder b , a stamina and the rollers cc . For this purpose I sheet drawings.