The P (or Phenate) Helmet, officially called the Tube Helmet, [1] appeared in July 1915, [2] replacing the simpler Hypo Helmet. It featured two mica eyepieces instead of the single visor of its predecessor, and added an exhale valve fed from a metal tube which the …

In between these two very different types of Helmet were the Phenate (P), and Phenate-Hexamine (PH) Helmets. These improved upon the earlier Hypo Hoods by being made out of two layers of fabric impregnated with sodium phenate which offered a good degree of protection against phosgene and hydrogen cyanide.

The P (or Phenate) Helmet, officially called the Tube Helmet, appeared in July 1915, replacing the simpler Hypo Helmet. It featured two mica eyepieces instead of the single visor of its predecessor, and added an exhaust valve fed from a metal tube which the wearer held in his mouth.

The P (or Phenate) Helmet, officially called the Tube Helmet, [1] appeared in July 1915, [2] replacing the simpler Hypo Helmet. It featured two mica eyepieces instead of the single visor of its predecessor, and added an exhale valve fed from a metal tube which the …

The PH (Phenate Hexamine) Helmet replaced the P Helmet in October 31st 1915 and was the same but was also dipped with added chemical Hexamethylene Tetramine which greatly improved the wearer against Phosgene and added protection from Hydrocyanic Acid.

Oct 26, 2016 · In between these two very different types of Helmet were the Phenate (P), and Phenate-Hexamine (PH) Helmets. These improved upon the earlier Hypo Hoods by being made out of two layers of fabric impregnated with sodium phenate which offered a good degree of protection against phosgene and hydrogen cyanide.

Feb 7, 2014 · From May of 1915 to the summer of 1916 the primary Gas defence of the British Army was the Gas Helmet. In fact the Helmets were retained as secondary Gas defence into 1918. There were 4 Types in use, the Hypo, P, PH and PHG. Here are some examples of Hypo, P , PH and PHG helmets.

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The P (or Phenate) Helmet, officially called the Tube Helmet, appeared in July 1915, replacing the simpler Hypo Helmet. It featured two mica eyepieces instead of the single visor of its predecessor, and added an exhale valve fed from a metal tube which the wearer held in his mouth.