DE1590543A1 - Method for producing an airspace-insulated coaxial cable - Google Patents

Description

STANDARD ElEKTEIK IOEENZ AG

Stuttgart-Zuffenhausen. _{n / o}

Hellmuth-Hirth-Str. 42 -. 1 O 9 UO HO

ISE / Reg. 2857

E.Y. GiIl-A.A.Morel 17-2

Process for the production of an airspace-insulated coaxial cable

The priority of application no. 10 367/63 of March 15, 1963 in the UK is a claim

taken.

The invention is concerned carries a coaxial cable, which consists of an inner and an outer conductor and a lying between these conductors insulating sleeve that carries the outer conductor, and at least one tape made of insulating material consists, d _a s on one side protrusions to be support the inner conductor. The invention specifies a method for producing an airspace-insulated coaxial cable, duaich that the projections are produced in an electrically insulating tape,. The tape is then designed tubular around the inner conductor in such a way that the projections point inward and are supported on the inner conductor, and the outer conductor is arranged around this tube-like insulating sleeve.

Accordingly, it is a process for producing a air-space-insulated coaxial cable, which is particularly distinguished by it is that a tape made of insulating material, such as polyvinyl chloride or bolyethylene, on one side with the distance between the inner and Provide outer conductors with corresponding protruding projections, the tape then around the inner conductor with inwardly facing projections designed and above the outer conductor is arranged.

Based on the drawings that show exemplary embodiments of the invention, the invention is explained in more detail.

Pigur 1 shows a perspective view of the insulating tape from FIG which the insulating sheath is formed.

3/12/1964 909835/0875

FIG. 2 shows a side view in the direction of arrow X in FIG Figure 1.

Figure 3 shows a perspective view of the cut open Cable with the band formed around the inner conductor according to FIGS. 1 and 2.

Figure 4 shows another form of insulating tape, e.g. made of polyethylene, according to Figure 1.

Figure 5 shows another form of polyethylene tape.

FIG. 6 shows the cut cable in which the insulating tape according to FIG. 5 is used.

Figure 7 shows the insulating tape, in which the projections the development form a helical screw.

Finally, FIG. 8 shows the cut cable, which has an insulating sleeve according to Figure 7 has.

Since polyethylene is an excellent insulating material for electrical Cable has proven and it is also excellent for the insulating sleeve suitable according to the invention, the insulating tape is hereinafter referred to as PET tape.

According to Figures 1, 2 and 3, a PET tape 1 with the projections 2 provided. According to FIG. 2, the projections have the shape of an equilateral triangle with a 7 / inch A equal about 12/0 °. The side surfaces 3 and 4 of the strip 1 lie in the same plane as the side surfaces of the adjoining projections.

Figure 3 shows how the tape 1 is designed lengthways around the inner conductor 5 , so that the projections 2 complement each other to the spacing discs 7, which are arranged at certain intervals on the inner conductor and this insulating sleeve is enclosed by the outer conductor 6.

The band 1 with the projections 2 can be produced by any known deformation method. For example, a PET tape between heated forming rolls or the pre-

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Jumps can be made according to what is known, for example, in the Zullulose industry Vacuum process are deformed. This strip 1, which is provided with shaped projections, is shaped lengthwise around an inner conductor 5, which unrolls from a supply drum. The outer conductor 6 can then, for example, also be designed lengthways around the band 1, which is still essentially preserved in addition to the projections. The long edges of the tape 1 then ran directly next to each other under the outer conductor. The outer conductor can then be isolated from it, for example a helical or lengthwise applied steel band reinforcement can be arranged. Such coaxial cables can also be converted into multiple cables sum up.

The tape 1 can also be wound helically around the inner conductor 5 and the rows of protrusions 2 can be arranged at a suitable angle to the longitudinal direction of the tape, as shown in FIG. Las Band 1 can also be lengthways in several strips are divided, which can be designed with touching longitudinal edges around the inner conductor.

FIG. 4 shows a differently shaped PET tape 8, the projections 9 which have the same shape as the projections 2 in FIG. The band 8 is designed as a partial cylinder under each projection 9, the radius of the partial cylinder outer surface being the radius of the outer conductor inner surface corresponds when the band around the inner conductor 5 is designed according to FIG. This avoids .that the band 8 in FIG. 4 forms folds or bubbles when it is laid around the inner conductor 5.

According to FIGS. 5 and 6, the PET tape 10 is different formed rows 11 and 12 of protrusions. The protrusions 13 in rows 11 and 12 are the same as protrusions 2 in Figure 2. The difference between these two rows of protrusions consists only in the fact that the projections are offset from one another by the length of half a projection.

When the tape 10 is designed around the inner conductor 16, they are superposed surfaces of the projections of adjacent rows of these projections rotated against each other.

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This can be seen in FIG. 6 ″ at 13 and 14 Coaxially twisted joints between the individual projections still hold the inner conductor in the best possible way under bending loads ser in its central location. The outer conductor 17 can now around the band 10 in the same way as that also described for FIGS is to be folded around.

FIGS. 7 and 8 show a PET tape 18 with rows 19 is occupied by projections 20, which are a certain to the longitudinal direction of the tape Take angles. The rows 19 are aligned on the tape that when the inner conductor 21 is folded over, they become one add continuous helical screw 22. The outer conductor 23 is arranged above this.

A helical screw 22 can also be produced in that the Rows 19 of the projections 20 according to Figure 7 are arranged in the longitudinal direction of the tape.

A plurality of V-end screws running parallel and coaxial to one another can also be attached by means of the rows 19 the projections 20 cross the belt 18 at a suitable angle, so. that the developments of the rows 19 close when the tape 18 is folded lengthwise around the inner conductor 21 or if, in the case of longitudinal rows 19 of the projections, the bands are placed helically around the inner conductor.

The protrusions formed on the PET straps also allow to attach these bands to a heated metal band, from which the outer conductor is to be formed, by welding or gluing, so that the insulating tape with the projections together with the outer conductor "is folded around the inner conductor in one operation or can be wrapped around.

9 claims

2 sheets of drawings, 8 figs.

BATH ORIGINAL 9098357087b

Claims (1)

1. Process for the production of an air-conditioned coaxial cable » characterized in that a tape made of insulating material, such as polyvinyl chloride or polyethylene, on one side with corresponding provided projections protruding from the tape between the inner and outer conductors, the tape is then folded around the inner conductor with the projections turned inward and the outer conductor over it is arranged. 2. The method according to claim 1, characterized in that several Ribbons are folded side by side around the inner conductor 3 «Method according to claim 1 and 2, characterized in that the Tape is folded helically or lengthways around the inner conductor « 4. The method according to claim 1 to 3, characterized in that Ribbons with through in cable length unj .; equally spaced groups of protrusions, which sioh after folding over the Supplement the insulating tape around the inner conductor to form spacer discs that can be folded around the inner conductor 5. The method according to claim 1 to 4, characterized in that the Projections are arranged on the tape in such a way that they have a helical shape after the insulating tape is folded around the inner conductor 6. The method according to claim 1 to 5, characterized in that the on the insulating tape arranged projection · from the »insulating tape are formed when this on the base of the The projection has an outer bending radius which corresponds to the bending radius of the inner tube surface of the outer liner. 7, 'Miftrauaiioliertea coaxial cable, consisting of · dt »indoor and dt« Outer conductor and one arranged between them and the two · *> Bohen them existing spacing insulating layer, daduroh 909835 / Q875 ^^ -6- characterized in that the insulating layer consists of an insulating tape lying on the inside of the outer conductor, the groups of formations that encompass the inner conductor and are supported at regular intervals in the cable lengthening forms. 8. coaxial cable according to claim 7, characterized in that the Formings form a helix 9 »coaxial cable according to claim 7 and 8, characterized in that Place the adjacent surfaces of the, for example, washer-shaped or helical-screw-shaped formations against one another 12 · 3 · 64 _BAD ORIGINAL 909835/0875 Blank page