Abstract: A mixed gas bell diving deep ocean simulator has particular utility in training of student commercial divers. Required training dives, both air and mixed gas, can be carried out in safety and at a substantial cost savings as compared with in-ocean training dives. The simulator comprises a hyperbaric cylinder serving as a work chamber and a diving bell suspended within the work chamber. The work chamber is flooded so that a portion of the diving bell is submerged. The bell and work chamber are compressed to simulate lowering of the bell to an ocean depth, and are decompressed to simulate raising the bell from that depth. An arrangement is provided for automatically tracking the pressure outside the bell (i.e., in the work chamber) with the pressure in the bell so that the simulated depth in the work chamber corresponds to that of the bell within a predetermined differential (e.g., three feet of sea water).

Abstract: A hyperbaric transfer system which has particular utility in transporting injured divers under high pressure from an offshore decompression chamber to an onshore decompression chamber complex. In its preferred form the system includes two chambers. The first chamber is a smaller transfer vessel capable of accomodating up to two individuals. The second chamber is a larger chamber capable of accomodating more than three and up to eight individuals. One of the individuals in the second chamber may be a medical attendant who can administer aid to an injured individual. Both chambers are capable of maintaining pressures of up to 335 psi, equivalent to a depth of about 750 feet.

Abstract: A diving bell is provided with a cut-out or aperture from which extends a ring portion. Attached to one end of the ring portion is a transparent door or window maneuverable into position, for example, by a davit or by a hinge assembly mounted on the diving bell. The door or window includes a transparent hemispherical portion made of lucite or glass, and a hollow cylindrical extension which is connected at one end to the transparent hemispherical portion and at its other end to the ring portion. Dogging latches mounted on the end of the hollow cylindrical extension connected to the ring portion allow for the locking and unlocking of the transparent door or window further allows for panoramic viewing of the surrounding terrain or water, as well as the conversion of an observation diving bell into a working bell with remote control.

Abstract: An apparatus for examining the interior of a bore hole and/or caisson. The apparatus includes a gyroscope arrangement for determining true azimuth reference and slant angle and slant angle azimuth direction relative to the reference. A television camera including a lighting section is fixed relative to the gyroscope package by a cage which is adapted for slidingly engaging the interior of the bore hole and/or caisson so that the gyroscope package can make effective determinations relative to the same in order to enable establishing the location of the television camera. A remote control is provided for controlling the lowering of the cage into the bore hole and/or caisson and for controlling the television camera as well as the lighting arrangement therefor. A television monitor is employed which is connected to the camera for displaying scenes of the interior as the gyroscope and camera arrangement is lowered through the bore hole and/or caisson.