Abstract: A waterproof, electrical connector with a bulkhead mounted receptacle having an "O"-ring or other expandable gasket compressed between the bulkhead and the mating surface of the receptacle shell. Another "O"-ring in the inside circumference of the one piece receptacle shell is compressed when the one piece plug shell is mated with the receptacle, thus forming a unitary type shell. A reinforced hose is secured by double turn clamps, one forward clamp on the nipple or rear of the plug shell at a point away from the end of the plug shell and beyond a shoulder at the rear of the plug shell and another rearward clamp on the cable connected to the plug. Any leakage of fluid is prevented from reaching the contacts or flowing through the connector by the placement of these "O"-rings and the clamped hose.

Abstract: A fluid tight camera housing system for deep underwater use wherein the camera focal length is unaffected by external hydraulic pressure. The housing system comprises an external housing cylinder capped at the rear by a lipped plate or dome. The lipped portion is grooved for an O-ring seal which slips into the housing, sealing against its internal wall. The front end of the external housing cylinder is capped with a pressure resistant negative correcting lens system in a ring mount lipped and grooved for an O-ring seal. The outer optical element has an O-ring or other seal between it and the lens mount. Internally, a camera chassis and a primary focusing lens are connected to an internal cylinder, which is connected to the pressure resistant correcting lens system. The internal cylinder centers the camera on the optical axis and holds it independently of the external housing cylinder and rear plate.