Abstract: A screw type, polymeric material extruder with an elongated body having a cylindrical bore with a hollow screw in the bore, the screw having external and internal threads. A cylindrical body is within the internal threads, and the screw with the wall of the bore and with the cylindrical body forms, respectively, an external material flow chamber and an internal material flow chamber. The cylindrical body can have channels for heating fluid and for additives or dyes. The screw can have openings for feeding one material to a single extrusion head with one mouth by way of both chambers, or the chambers can be supplied with the same or different materials which are fed by way of the chambers to an extrusion head with two mouths for applying the latter materials separately.

Abstract: A composite tape for forming at least part of the insulation of a high voltage electrical cable, particularly an oil-filled cable, and a cable including such insulating tape. The composite tape includes at least one layer of paper tape having a borate or silicate weight content in the range form 0.1 to 3% of the weight of the paper bonded to at least one surface or the surfaces of a film of bi-oriented polymeric plastic material by a copolymer layer which has a thickness of from about 1-10 microns. The thickness of all the plastic material in the composite tape is in the range from 10 to 30% of the total thickness of the tape. Preferred polymeric materials are polypropylene and polymethylpentene. A bonding material can be propylene-ethylene copolymer.

Abstract: A connector for connecting an optical fiber to another optical fiber or other optical signal receiving device, the connector having an elongated body with a central bore which is larger than the optical fiber with a protective layer thereon so that the latter freely slides in the bore. The body also has a pair of spaced reference elements or shoulders on its exterior surface, and a bushing with elastic fingers encircles the portion of the body with the shoulders and is longitudinally slidable between positions in which it engages one shoulder or the other shoulder. The bushing also has a ferrule with a bore for the passage of the bare optical fiber. Also, a method for accurately positioning the fiber in the connector, in which the fiber is cut while it extends from the ferrule and the bushing engages the shoulder farther from the cut, and the bushing is then moved so that it engages the other shoulder and is secured to the body.

Abstract: A submarine, optical fiber telecommunication line having optical fiber cables with external armor interconnected with optical fiber cables with only internal armor by opto-electronic repeaters and tubular bodies. The repeaters, the tubular bodies and the cables can withstand the tensile and hydrostatic stresses to which they are subjected during laying and after laying. At the shore ends, the repeaters are mechanically connected at one of their ends to cables with external armor. The other ends of the repeaters are mechanically connected to the tubular bodies which are mechanically connected to the sheaths and the internal armor of cables with only internal armor. The tubular body has an internal partition to which the internal armor is mechanically connected and has an internal sealing plug for preventing axial flow of water.

Abstract: A device associated with a gas mask suitable for introducing liquid substances to the user of the mask. The liquid substances are contained in a container provided with a penetrating or syringe-shaped nozzle. The device comprises a tubular conduit inside the mask having at least one elbow portion elastically deformable from a first idle position to a second position at or adjacent the user's mouth and vice versa, respectively, when the penetrating nozzle is introduced inside the conduit through the entire elbow portion and withdrawn from the same elbow portion.

Abstract: A pneumatic tire for motor vehicles has a low absorption of horse-power. The tire has an annular tread reinforcing structure disposed in the crown which comprises two layers of rubberized fabric with metallic cords having a diameter of not more than 0.603 mm embedded therein; the radial reciprocal distance between the centers of two facing cords in the radial direction on the cross-section of the tire is not over 1 mm.

Abstract: A joint between two different types of optical fiber cables, the tension and compression stresses to which the cables are subjected being withstood in one of the cables by a centrally disposed armor having the optical fibers therearound and in the other of the cables by an armor surrounding the optical fibers. The joint includes a plate with a central opening, a plurality of spaced second openings around and spaced from the central opening and a plurality of spaced third openings around and spaced from the second openings, the central armor being secured in the central opening, the armor of the other cable being secured in the third openings and the optical fibers of one of the cables extending through the second openings and being connected to the optical fibers of the other cable. A protective body extends from one cable to the other and encloses the plate, the securing devices, the connections and the portions of the armors and the fibers intermediate the cables.

Abstract: A method for interconnecting optical fiber cables and a connector for use in such method. In the method, the spherical lenses normally used to couple the fibers is replaced by a spherical body of smaller diameter and the fibers are brought into contact with such body and fixed in axial position. Thereafter, the body is replaced by the lenses normally used which provides the correct spacing between the latter lenses and the ends of the optical fibers. The connector has housings for the normal lenses part of which is removable for the substitution of the spherical body during adjustment of the positions of the optical fibers.

Abstract: In the manufacture of an optical fiber cable in which optical fibers are paid out from supply bobbins and inserted into the grooves of a core member by means of an inserting head, a photoelectric optical system is disposed between the supply bobbins and the inserting head to provide signals indicating the position of the optical fibers advancing from the supply bobbins. A control device is connected to the photoelectric system and is responsive to the signals generated therefrom to control the speed at which the optical fibers are paid off from the supply bobbins.

Abstract: An electrical cable with a core comprising an electrical conductor surrounded by insulation and with both a screen of wires in open helix configuration on the core and at least one other wire extending longitudinally of the core and electrically contacting the wires of the screen. An insulating sheath surrounds the screen and may itself embed the wires or it may surround a layer of extruded material which at least partially embeds the wires. The material of the layer may be insulating or semi-conductive. Also, a process for manufacturing such cable.

Abstract: Method and apparatus for cutting optical fibres, whereby said optical fibres provided with at least one protective covering, are caused to be cut by the transveral movement of two blades rigidly connected to one another and forming an angle of less than 45.degree. between them.

Abstract: A filler compound for the spaces between the wires of a stranded conductor surrounded by and contacting a semiconductive layer which is surrounded by a layer of extrudced insulation, a method for filling such spaces with the compounds and an electric cable including such compound. The compound has a polymeric base, a Mooney viscosity at 100.degree. C. between 10 and 60 and a Shore A hardness between 10 and 90. Preferably, the compound includes hygroexpansible, water insoluble organic powder having particle sizes less than 200 microns and specified other characteristics.

Abstract: A flexible belt, made of an elastomeric material, comprising an annular body, delimited by two base surfaces and by two lateral sides; at least one of the base surfaces disposed with a predetermined winding arc around a pulley from which it receives or, to which it transmits, motion by friction. The sides of the annular body are inactive for transmitting the forces by friction. The belt that is for example, flat, is extensible, and it comprises at least one group of three layers in direct contact with one another, each layer of which includes or comprises reinforcing fibers disposed in a single predetermined direction. In the reinforcing structure no inextensible cords are present. The belt may comprise an annular element on at least one of the base surfaces of the annular body, for opposing any lateral shifting relative to the transmission pulley.

Abstract: A connector for interconnecting optical fiber cables or an optical fiber with an optical component, the cable or cables having an optical fiber encircled by a tension resistant member comprising a yarn. The connector has a hollow cylindrical body which slidably receives a lens mount with a lens thereon, the optical fiber is secured to the lens mount and the tension resistant member is secured to the body so that the cable can be pulled without applying damaging stress to the optical fiber. The lens mount is spring biassed into its normal position in which is couples optical signals to another cable or to an optical component.

Abstract: An optical fiber submarine cable having only a central rope for withstanding the stresses to which the cable is subjected, a plastic core with interrupted but closed or substantially closed, grooves at its outer portion, at least one optical fiber in each groove, a sheath around the core, and a substantially incompressible fluid filling all otherwise empty spaces within the sheath including any such spaces between the wires of the rope and in the grooves. The grooves are separated by ribs, and before the sheath is applied the diameter of the core at the ribs is greater than the diameter of the inner surface of the sheath and the sides of the ribs are separated to provide grooves opening outwardly of the core. Also, a process for manufacturing such a cable.

Abstract: A direct current electric cable with a conductor, a semi-conductive screen around and contacting the conductor, a plurality of layers of insulation formed by tapes of insulating material around the semi-conductive screen, a further semi-conductive screen around the layers of insulation and a metal sheath around the further semi-conductive screen, the layers of insulation being impregnated with a non-migrating, insulation composition having a dropping point temperature at least 5.degree. C. above the maximum operating temperature of the cable and having an electronegative gas dissolved therein, the gas having a coefficient of diffusion in the composition in the range from 3.times.10.sup.-5 to 3.times.10.sup.-6 cm.sup.2 /sec at temperatures below the dropping point temperature of the composition.

Abstract: A traction resistant termination for a tube which transports fluids under high pressure, the tube having an inner tubular member of an elastomeric or plastomeric material surrounded by at least two helically wound layers of metal straps. The tubular member is received within a first hollow cylindrical body extending from a flange having an opening therethrough with which the body is coaxial. The layers of metal straps and a powder having a hardness greater than the hardness of the straps and surfaces adjacent thereto are clamped between the first body and a second hollow cylindrical body coaxial with the first body. At least one of the first and second bodies is integral with the flange. Also, a method of interconnecting the tube with such bodies.

Abstract: This invention concerns a tire especially for motorcycles, having a textile carcass that comprises at least one pair of cord plies. Each ply has a plurality of cords. The cords are parallel to each other, crossed with those of the adjacent plies and are symmetrically inclined with respect to the circumferential direction, preferably at an angle between 50.degree. and 65.degree. to the midcircumferential plane, measured on the tire crown zone. The tire also has an annular reinforcing structure between the carcass and the tread, comprising at least one pair of textile cord strips, the cords of said strips being crossed with each other and symmetrically inclined with respect to the circumferential direction, at an angle comprised between 18.degree. and 25.degree., measured also on the crown of the tire.

Abstract: Apparatus for sensing the position of a body which is rectilinearly movable with respect to a fixed, reference body which apparatus comprises a pair of surfaces on the movable object each with areas with a low coefficient of reflection and with a high coefficient of reflection and a pair of lens systems for projecting light on and receiving reflected light from respective ones of such surfaces. Light is supplied to such lens systems by optical fibers which are coupled to light-to-electrical signal converters for providing electrical signals dependent upon the amount of reflected light received from the surfaces and hence, upon the relative positions of the bodies. The pair of surfaces may be on the end of a piston operable by the pneumatic springs of a vehicle. Also, computer systems for processing the electrical signals of the converters and for actuating controls for changing the position of the movable body.

Abstract: An electric cable having at least one conductor and at least one covering therefor obtained from the polymerization of a silanic monomer of a compound comprising a non-cross-linked base-polymer and a polymerizable silanic monomer present prior to polymerization in a quantity not less than 5 parts by weight with respect to 100 parts by weight of the base-polymer. Thepolymerization of the silanic monomer units forms a polymeric mesh which is closely interconnected and thoroughly compenetrated into the non-cross-linked base-polymer. In one embodiment the polymeric mesh may be grafted onto the base-polymer through the addition of an organic peroxide. Thus, there is provided an electric cable for use as building wires wherein the conductor covering is not cross-linked but is heat resistant to temperatures above the deformation temperature of the base-polymer.