Protective device for overhead wires containing optical fiber units

DETAILED DESCRIPTION What are claimed are: 1.
Structure for connecting overhead earth wires containing an optical fiber unit, said optical fiber unit being disposed in the center of a bundle of conductors, said structure comprising connector means for connecting said overhead earth wires therein and for compression against said conductors for mechanical and electrical connections, and protecting means for protecting said optical fiber unit from being deformed when said connector means is compressed, said protecting member having a tapered portion merging into a straight portion and being formed with a through hole to pass said optical fiber unit therethrough and a plurality of longitudinal grooves extending from the middle of said tapered portion and through the complete length of said straight portion for receiving said conductors therein.
2.
The structure as claimed in claim 1, wherein said connecting means is a dead end clamp.
3.
The structure as claimed in claim 1, wherein said connecting means is a mid span joint.




Description:
The present invention relates to improved structure for connecting overhead earth wires containing an optical fiber unit, and more particularly to the structure for connecting them in a dead end clamp or a mid span joint.
FIG.
1 shows an example of overhead earth wires containing an optical fiber unit.
An optical fiber unit 2 is disposed in the center of a bundle of six conductors 1, each of which consists of e.
g.
an aluminum or aluminum alloy wire.
FIG.
2 shows the above-described overhead earth wire 3 inserted in a dead end clamp 4, which is compressed at the portions indicated by arrows a and b for mechanical and electrical connections.
In case of a conventional structure, a wedge-shaped protecting member 5 is inserted between the conductors 1 and the optical fiber unit 2 in order to protect the unit from deformation when compressed.
The protecting member 5 is provided at one end thereof with a ring 6 having holes into which pins 7 are inserted at regular intervals between the conductors 1 as shown in FIG