CH635944A5

CH635944A5 - Protective device for an optical fibre unit

Info

Publication number: CH635944A5
Application number: CH43779A
Authority: CH
Inventors: Guido Rinaldi
Original assignee: Volpi Ag
Priority date: 1979-01-17
Filing date: 1979-01-17
Publication date: 1983-04-29

Abstract

In order to protect an arbitrary optical fibre unit against mechanical destruction such as can occur as a consequence of tensile or compressive stresses through tearing or rupture of the fibres of a unit, only one unit end is firmly mounted in its end piece (2) in the case of a fibre unit (4) installed in a flexible body (1), while the other unit end has in its end piece (3) a free, sliding bearing, as a result of which the effect of stresses due to shifting of the unit end can be compensated. <IMAGE>

Description

       

  
 

**WARNUNG** Anfang DESC Feld konnte Ende CLMS uberlappen **.

 



   PATENTANSPRUCH
Schutzeinrichtung für ein Glasfaserbündel, das in einem flexiblen Körper eingebaut ist, dadurch gekennzeichnet, dass mindestens ein Glasfaserbündelende in einem zugehörigen
Endstück des flexiblen Körpers gleitend gelagert ist, um durch eine freie, gleitende Verschiebungsbewegung die sonst bei der
Biegung entstehende   Zug-    oder Druckspannung und dadurch eine mechanische Zerstörung des Faserbündels zu   vernindern.   



   Glasfaserbündel, wie sie für optische Licht- oder Bildübertragung verwendet werden, zeichnen sich durch eine gute Flexibilität aus. Trotz dieser Flexibilität führen stärkere Zug- oder
Druckbeanspruchungen von Faserbündeln, deren Bündelen den fest montiert sind, mit Sicherheit nach einiger Zeit zur Zer störung des Bündels durch Zerreissung oder Bruch der Fasern.

 

   Diese Gefahr wird durch die im Patentanspruch definierte
Erfindung ausgeschaltet.



   In einem möglichen Ausführungsbeispiel zeigt die Fig. 1 einen sogenannten Schwanenhals, dessen flexibler Teil 1 von zwei Endstücken 2 und 3 abgeschlossen ist. Im Inneren dieses Schwanenhalses ist ein Glasfaserbündel 4 montiert. Dieses Glasfaserbündel ist im Endstück 2 fest eingekittet, jedoch im Endstück 3 mit der Endhülse 5 frei gleitend gelagert.



   Die Fig. 2 zeigt den Schwanenhals im gebogenen Zustand.



  Hier ist ersichtlich, dass infolge der aufgetretenen Zugspannung die Endhülse 5 des Glasfaserbündels 4 um den Differenzbetrag 6 in das Endstück 3 hereingezogen worden ist und damit das Glasfaserbündel entlastet und vor einer Beschädigung geschützt wurde. 



  
 

** WARNING ** beginning of DESC field could overlap end of CLMS **.

 



   PATENT CLAIM
Protection device for a glass fiber bundle, which is installed in a flexible body, characterized in that at least one glass fiber bundle end in an associated
End piece of the flexible body is slidably mounted by a free, sliding displacement movement which otherwise at the
Bending tensile or compressive stress and thereby to prevent mechanical destruction of the fiber bundle.



   Glass fiber bundles, such as those used for optical light or image transmission, are characterized by good flexibility. Despite this flexibility, stronger pull or lead
Compressive stresses of fiber bundles, the bundles of which are firmly attached, will certainly destroy the bundle after a while by tearing or breaking the fibers.

 

   This risk is defined by the one defined in the claim
Invention switched off.



   1 shows a so-called gooseneck, the flexible part 1 of which is closed by two end pieces 2 and 3. A glass fiber bundle 4 is mounted inside this gooseneck. This glass fiber bundle is firmly cemented in the end piece 2, but is freely slidably mounted in the end piece 3 with the end sleeve 5.



   Fig. 2 shows the gooseneck in the bent state.



  It can be seen here that the end sleeve 5 of the glass fiber bundle 4 has been drawn into the end piece 3 by the difference 6 as a result of the tensile stress that has occurred, thus relieving the glass fiber bundle and protecting it from damage.

Claims

PATENT CLAIM Protection device for a glass fiber bundle, which is installed in a flexible body, characterized in that at least one glass fiber bundle end in an associated End piece of the flexible body is slidably mounted by a free, sliding displacement movement which otherwise at the Bending tensile or compressive stress and thereby to prevent mechanical destruction of the fiber bundle.

Glass fiber bundles, such as those used for optical light or image transmission, are characterized by good flexibility. Despite this flexibility, stronger pull or lead Compressive stresses of fiber bundles, the bundles of which are firmly mounted, will certainly destroy the bundle after a while by tearing or breaking the fibers.

This risk is defined by the one defined in the claim Invention switched off.

1 shows a so-called gooseneck, the flexible part 1 of which is closed by two end pieces 2 and 3. A glass fiber bundle 4 is mounted inside this gooseneck. This glass fiber bundle is firmly cemented in the end piece 2, but is freely slidably mounted in the end piece 3 with the end sleeve 5.

Fig. 2 shows the gooseneck in the bent state.

It can be seen here that the end sleeve 5 of the glass fiber bundle 4 has been drawn into the end piece 3 by the difference 6 as a result of the tensile stress that has occurred, thus relieving the glass fiber bundle and protecting it from damage. ** WARNING ** End of CLMS field could overlap beginning of DESC **.