Abstract: Underwater fiber optic connectors and methods of such connection are described wherein a first optical fiber and a first o-ring are positioned in a first connector portion. The first o-ring acts as a fulcrum between the first fiber and the first connector portion such that the first fiber is free to become nonparallel with a longitudinal axis of the first connector portion. The connectors and methods of connection can further comprise a second optical fiber and a second o-ring positioned within a second connector portion. Again, the second o-ring acts as a fulcrum between the second fiber and the second connector portion such that the second fiber is free to become nonparallel with a longitudinal axis of the second connector portion.

Abstract: An underwater electrical connector includes a plug shell, a receptacle shell, and removeable inserts. A substantially water tight seal is provided between the plug and receptacle shells when engaged, and preferably the plug shell and the socket shell have a maximum diameter of less than approximately 0.75 inches. In some embodiments, the plug and receptacle inserts are held in place with retaining rings comprising a shape-memory alloy. A low profile key having one portion flush with a shell surface may be provided, as well as an optional insert mounted oil valve.

Abstract: An underwater electrical connector comprises a pair of mating plug and socket connector shells each containing a contact carrying insert body. When the shells are connected together, contact pins projecting from the front face of one of the insert bodies engage in corresponding contact sockets on the front face of the other insert body. The connector shells have an interengageable key and keyway formation for maintaining correct orientation as they are secured together. Each insert body has a keyed engagement with its respective shell as it is inserted. One of the insert bodies has a rearwardly projecting sleeve which engages in a corresponding rearwardly projecting sleeve on the respective connector shell as it is inserted. The shell sleeve has an axial through slot extending from its free end, and the insert body sleeve has a corresponding outwardly projecting key for engagement in the through slot.