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Samantha Cristoforetti demonstrating the use of the Valsalva device in the Sokol space suit. The Valsalva device is a device used in spacesuits, some full face diving masks, and diving helmets to allow astronauts and commercial divers to equalize the pressure in their ears by performing the Valsalva maneuver inside the suit without using their hands to block their nose.
Bascinet with a bretache (nose protection) and aventail (chainmail neck protection). This illustration shows a bascinet with a type of detachable nasal (nose protector) called the bretache or bretèche made of sheet metal. [10] The bretache was attached to the aventail at the chin, and it fastened to a hook or clamp on the brow of the helmet. [10]
A diver in a pool wearing an AGA full face mask A diver wearing an Ocean Reef full face mask Head protection helmet for use with Ocean Reef full face diving mask. A full-face diving mask is a type of diving mask that seals the whole of the diver's face from the water and contains a mouthpiece, demand valve or constant flow gas supply that provides the diver with breathing gas. [1]
The enclosed helmet covered the entire head, with full protection for the face and somewhat deeper coverage for the sides and back of the head than that found on previous types of helmets. It was developed near the end of the 12th century and was largely superseded by the true great helm by c. 1240.
A woman wearing an oxygen mask. An oxygen mask is a mask that provides a method to transfer breathing oxygen gas from a storage tank to the lungs.Oxygen masks may cover only the nose and mouth (oral nasal mask) or the entire face (full-face mask).
German sallets were often worn with a separate scoop-shaped plate gorget, called a bevor, that extended from the upper chest to just below the nose and protected the wearer's lower face and throat. Most needed no added ventilation holes, as there was a natural gap where the visor or front of the helmet overlapped the bevor near the wearer's mouth.
11th century Moravian nasal helmet, Vienna. One of the few remaining examples of such helmets. The nasal helmet was a type of combat helmet characterised by the possession of a projecting bar covering the nose and thus protecting the centre of the face; it was of Western European origins and was used from the late 9th century to at least c. 1250.
A visor was an armored covering for the face often used in conjunction with Late Medieval war helmets such as the bascinet or sallet. [1] The visor usually consisted of a hinged piece of steel that contained openings for breathing and vision. Appropriately, breaths refers to the holes in the metal of the visor. [2]
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