Submersible chamber

摘要

Diving apparatus which includes a bell assembly normally negatively buoyant and including a bell. There are frame means movable vertically beneath the sea surface. Such frame means are movable between an upper position and a lower position above the subsea surface and at which the frame means can be made temporarily stationary. Bell moving means are connected between the bell assembly and the frame means for moving the bell between a lower position adjacent the subsea surface and an upper position adjacent the frame means.