Diving helmet actual size (Top product)

A diving helmet was used by divers, with a brass diving helmet, diving suit twill, heavy bulky leaden shoes, ditto chest / back support or a weight belt to lead, descended from a ship. Their helmet was connected to an air hose, which for safety reasons has been fixedly put on the helmet. The diver had for the same reason a rope around his waist. A diving helmet was made of copper and had three or sometimes four glass viewing windows. The front window could be opened. Left, right and sometimes slanted top, there was a window to a wider peripheral vision. The diving helmet was because of its weight can not be screwed by the diver on the neck shoulder plate, this was done by assistants. While underwater go flocking helmet and wetsuit full of air through the inlet of the air pump on the ship or on the shore. In order to be able to go under the water the lead weights were necessary. In the case that the diver under water got into a dangerous situation, he could by the removal of the lead weights quickly to the surface. However, by the pressure difference with this, it could lead to the dreaded caisson disease, sometimes with fatal outcome. Today, other diving helmets are also used for working at greater depths. These diving helmets are mounted on steel diving suits whose "hands" are grappling hooks. The diver operated with grappling hooks from the inside with his hands. The heavy steel can hold the pressure of the water treaties to 400 meters depth, while the pressure in the package remains the same as at the surface.

 
Diving helmets