The closed diving suit, connected to an air pump on the surface, became the first effective standard diving dress, and the prototype of hard-hat rigs still in use today.
An important part of the equipment is the lead weights, generally on the chest, back and shoes, to counteract the buoyancy of the helmet and diving suit.
They marketed the helmet with a loosely attached diving suit so that a diver could perform salvage work but only in a full vertical position, otherwise water entered the suit.