Submersible electrical connector
View Patent ↗A connector for use underwater or in a wet or severe environment comprises first and second connector parts adapted to be interengaged to establish an electrical connection. The first connector part has at least one pin, and the second connector part has at least one electrical contact for engagement by the pin when the connector parts are interengaged. The pin comprises an axially extending electrically conductive portion and an axially extending electrically insulating sleeve around said conductive portion, and the pin is supported by and projects axially forwardly from a support whereby its insulating sleeve is exposed along a longitudinally extending portion thereof to ambient conditions when the connector parts are disengaged. The insulating sleeve of the pin has a first portion with a first diameter in front of a second portion with a second diameter wider than the first diameter, and the connector part has a protective rigid metal sleeve member arranged to extend at least partly along the first portion of the insulating sleeve and at least partly along the second portion thereof. The rigid metal sleeve provides mechanical support to the protected portion of the pin.
1. A connector part for use underwater or in a wet or severe environment and for interengagement with a second connector part to establish an electrical connection, the connector part having at least one pin extending axially from a support for engagement with an electrical contact in the second connector part when the connector parts are interengaged, said pin comprising:
an axially extending electrical conductor; and
an axially extending electrically insulating sleeve around said conductor, said insulating sleeve having an outer surface and a longitudinally extending portion forward of the support, said longitudinally extending portion comprising a metal or metalized coating formed on said outer surface forward of the support and exposed to ambient conditions when the connector parts are disengaged, the metal or metalized coating suppressing penetration of water into said longitudinally extending portion and reducing localized condensing of equipotential electric field lines in a region radially outward of the metal or metalized coating.
2. A connector part as claimed in claim 1 , wherein the thickness of the metal or metalized coating is less than 30 μm.
3. A connector as claimed in claim 1 , wherein the thickness of the metal or metalized coating is less than 100 μm.
4. A method of depositing the metal or metalized coating on a pin of a connector as claimed in claim 1 , comprising etching the surface of the insulating sleeve, and depositing the coating on the etched surface by a suitable deposition process.
5. A connector part as claimed in claim 1 , wherein the metal or metalized coating comprising a base layer and a top layer.
6. A connector part as claimed in claim 5 , wherein the base layer comprises copper.
7. A connector part as claimed in claim 5 , wherein the top layer comprises nickel.
8. A connector part as claimed in claim 5 , wherein the base layer is less than 15 μm thick.
9. A connector part as claimed in claim 5 , wherein the top layer is less than 15 μm thick.