High Quality Content by WIKIPEDIA articles! A standard diving dress consists of a metallic (copper, brass or bronze) diving helmet, an airline or hose from a surface supplied diving air pump, a canvas diving suit, diving knife and boots. An important part of the equipment is the addition of lead weights, generally on the chest, back and boots, to counteract the buoyancy of the helmet and diving suit. This type of diving equipment is also known as hard-hat equipment or a "John Brown" rig, so-called after the British company that built many of the helmets. In the United States, it is sometimes known as a "Diver Dan" outfit, from the television show of the same name. It was commonly used for underwater civil engineering, commercial diving and naval diving. The diving helmet was designed by Charles Dean, a ship's caulker, in 1820 in England. The patent was sold to his employer Edward Barnard. It was originally intended as a fire fighter's breathing apparatus, but was not well received and underwater use was an after thought.

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