Optical waveguides – Accessories – Plug/termination device
Patent
1995-05-26
1997-08-26
Ngo, John
Optical waveguides
Accessories
Plug/termination device
385 99, 385147, 174 93, 174DIG8, G02B 638
Patent
active
056618425
ABSTRACT:
A method for providing substantial protection and insulation for submarine cable joints without utilizing costly molding and x-ray equipment. A heat shrinkable polyolefin protective covering includes an unexpanded conical transition between two expanded cylindrical portions. The unexpanded conical transition precisely locates the protective covering against a conical portion of a submarine cable jointbox. Polyamide adhesive is applied to the inside surfaces of the protective covering. During the application of heat to the protective covering, insubstantial relative movement between the conical transition portion of the protective covering and the locating portion of the jointbox allows proper alignment of the protective covering as the expanded cylindrical portions shrink and move relative to the jointbox. The diameters of the cylindrical portions of the protective covering are selected such that a nominal hoop stress is created during heating to minimize air entrapment and voids in the adhesive. Two protective coverings are overlapped to maximize the dielectric strength of the coverings, and to increase the path length for water egress into the joint.
REFERENCES:
patent: 4487994 (1984-12-01), Bahder
patent: 4586970 (1986-05-01), Ishise et al.
patent: 4737004 (1988-04-01), Amitay et al.
patent: 5066095 (1991-11-01), Dekeyser et al.
AT&T
Ngo John
Young Mark K.
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