Optical waveguides – With disengagable mechanical connector – Structure surrounding optical fiber-to-fiber connection
Reexamination Certificate
1999-11-02
2001-06-05
Palmer, Phan T. H. (Department: 2874)
Optical waveguides
With disengagable mechanical connector
Structure surrounding optical fiber-to-fiber connection
C385S053000, C385S055000, C385S056000
Reexamination Certificate
active
06241398
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to the provision of an electromagnetic compliance and electrostatic discharge shield assembly for an optical fiber connector extending through an opening in a conductive faceplate.
Modern electronic systems equipment, such as for telecommunications purposes, often includes various subassemblies packed closely together and interconnected by cabling. Such systems operate at relatively high frequencies and therefore electromagnetic radiation and interference is often a problem. To obviate this problem, the cables often include a conductive outer jacket which provides shielding and grounding for the cable. In addition, the subassemblies are often encased within a conductive housing. While such a housing is somewhat effective, electromagnetic radiation can still pass through gaps in the housing. At the increasingly high frequencies utilized in today's equipment, even a small gap permits unwanted electromagnetic radiation to pass therethrough. In addition, an electrostatic discharge from a person approaching the housing can jump through the gap and damage sensitive electronic components within the housing. One source of such a small gap is an optical fiber connector extending through an opening in a faceplate. The optical fiber itself is non-conductive, as are portions of the connector. Accordingly, there exists a need to provide an effective shielding and grounding assembly to eliminate the effects of such gaps.
SUMMARY OF THE INVENTION
According to the present invention, there is provided an electromagnetic compliance and electrostatic discharge shield assembly for an optical fiber connector extending through an opening in the faceplate. The assembly comprises a conductive nut adapted to secure the connector to the faceplate. A conductive elongated tubular member is provided which is adapted to surround an optical fiber connected to the connector and to engage the exterior of the nut at one end of the tubular member.
In accordance with an aspect of this invention, the tubular member tapers inwardly toward its end remote from the one end.
In accordance with another aspect of this invention, the nut has an engagement feature on its exterior circumferential surface and the tubular member has at the one end an interior engagement feature complemental to the exterior engagement feature of the nut.
REFERENCES:
patent: 5082338 (1992-01-01), Hodge
Correa Everado
Hwang Liang
Ruduski Michael S.
Davis David L.
Lucent Technologies - Inc.
Palmer Phan T. H.
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