Abstract: A method for on-site connection of two transmission cables comprising optical fibres, each cable having a protective armouring enclosing a central core provided with regularly spaced grooves on its periphery. Each groove holds a fibre provided with a thin sheath of uniform thickness. After the end of one of the cables has been bared over a given length, the uncovered fibres are moved towards the exterior and secured to a holder surrounding the cable. Thereafter the core is cut perpendicularly to its axis and a grooved portion of an extension core is secured thereto; the fibres are bent back into the grooves in the said portion, and the core portion and the fibres which it bears are cut and subsequently coated with a lubricant. The same operations are performed on the end of the other cable and the two cables are clamped together under a predetermined pressure.Various devices for the embodiment of the method are described.

Abstract: Device for providing the end portions of the fibers of a flat optical fiber ribbon with connectors. It comprises an elongated connector having two adjacent inner surfaces defining a re-entrant orthogonal connector dihedron and two adjacent outer surfaces defining a projecting orthogonal connector dihedron and a third surface formed with at least a longitudinal groove, and a template having a first and a second adjacent surfaces defining a re-entrant orthogonal template dihedron. At least two members transverse to the template bear a first groove for receiving the sheathed part of the optical fiber and a second groove aligned with the first groove for receiving the stripped part of the fiber. The projecting connector dihedron is applied against the re-entrant template dihedron and the fiber is guided in the grooves on each side of its path along the connector groove, whereby it can be bonded to the connector in predefined position.

Abstract: Apparatus for on-site connection of two transmission cables comprising optical fibres, each cable having a protective armouring enclosing a central core provided with regularly spaced grooves on its periphery. Each groove holds a fibre provided with a thin sheath of uniform thickness. After the end of one of the cables has been bared over a given length, the uncovered fibres are moved towards the exterior and secured to a holder surrounding the cable. Thereafter the core is cut perpendicularly to its axis and a grooved portion of an extension core is secured thereto; the fibres are bent back into the grooves in the said portion, and the core portion and the fibres which it bears are cut and subsequently coated with a lubricant. The same operations are performed on the end of the other cable and the two cables are clamped together under a predetermined pressure.Various devices for on-site connection of cables with optical fibres are described.

Abstract: An adjustable connector assembly for a laser effect diode, a focussing lens and an optical fibre in an optical fibre transmission system comprising a tubular body generally symetrical about the axis. One end of the tubular body, namely the front end, is provided with an adjustable diode socket assembly means including a first adjustment means at the front end and a socket means for filtering the focussing lens. The other end of the tubular body is provided with a fibre assembly means including transverse second adjustment means so that the ends of the optical fibres may be adjustably positioned in the transverse or xy plane relative to the axial direction, the Z axis of the tubular body. Thus the luminous ray or beam diverted by the diode is adjustable by the first adjustment means at the front end which can vary the position of the diode to the focussing lens in the Z divertion, e.g.

Abstract: Method for splicing optical fiber cables which applies to those cables having an axial core and fibers disposed around the core, parallel to the cable axis or having a slight slant with respect thereto. At the places where splicing will have to be made, when the cable is laid down, the jacket of the cable is removed the fibers are glued on the core and two half-shells are disposed round the glued fibers and encase them. The half-shells are bonded to the core and fibers by gluing under pressure. When the glue has set, the half-shells together with the fibers and cable core are sawn perpendicularly to the cable axis which gives two half-shell segments. These segments have registering bores and splicing is achieved by inserting calibrated columns or pins into these bores.