Seen here using the Dutch Diving Helmet on the right is Kees de Jonge the designer or the helmet . In the middle is a member of the Working Equipment Group using an Aquabell helmet from around 1970 The helmet on the left is a Miller Dunn Style 1 from around 1920 and is being used by your web host.
In the picture below we see Kees demonstrating a 1950's Siebe Gorman 6 bolt helmet . Kees has descended to the pool floor using the traditional method of descent, a shot rope. Air is supplied by a high pressure cylinder supplying air at a rate of 52 litres per minute at the surface. This rate is calculated to purge the helmet rapidly of carbon dioxide which is present in the divers expired air.
In a close up shot we see Kees is clearly enjoying the dive! The nose clip is used by the diver to equalise as he descends . If there is a flat bottom the diver would knock off the clip to make breathing more comfortable when working.
In the picture below we see the Snead style2 being demonstrated . Made from cast Iron the weight of the helmet meant there were no extra weights required to make the helmet negatively buoyant. There were 2 styles of this helmet , the earlier one having a larger window.
For more information regarding the Dutch Diving Helmets visit this page Dutch Diving Helmets
or visit www.dutchdivinghelmets.com
