#GAS MASK WW1 B AG UPGRADE#

Companies such as Avon India continued to use the gum-type rubber into the mid-1930s but this was completely phased out by the beginning of the war. This, however, fell out of service in favour of the black rubber blend which enabled the use of reclaimed rubber to reduce costs. The rubber used, initially was an orange/red rubber often referred to as 'gum rubber'. This part also incorporated a tube which would connect by wire and tape to a corrugated, stockinette-coated rubber tube. IV did away with the archaic flutter-type exhale valve and used a simple suspended disk-type valve in a metal housing known as a valve holder. III and was a very similar shape, however, the improvements to the older design were many. Respirator featured the same thread-less eyepieces found on the Mk. IV, it was the favoured design which saw service following the war. V in 1939 and was issued with stockinette removed. This was designed to stop the need of standard and Special T Mic faceblanks. New variants of the in/outlet assembly were developed and even a new faceblanks with a sealed mic port which could be cut into. III Eyepieces were introduced, with two parts threaded together which would allow for easier lens replacement. It was also around this time that the later Mk. IV General Service Respirator.ĭuring the 1930s, the push for use of reclaimed black-rubber resulted in reduced, and eventually discontinued, use of the orange natural rubber faceblanks, though this rubber was still used to seal the eyepieces. By 1926, it was complete and named the Mk. However, the need to move on from primitive features such as mouth-pieces, flutter-valves and box containers was clear and so, development on a new respirator facepiece began. III and II were used with the container which would become the Type A. By 1922, the training container became known as the Type A and the mobilisation container, the Type D.ĭuring the early inter-war years, G. The mobilisation container was based on the 1918 improved container, similar to the US MI Felt Canister (it is unclear which was designed first).

#GAS MASK WW1 B AG UPGRADE#

The training container was a general upgrade to the late box respirator container, filled only with charcoal. In 1919, policy dictated that two containers should be designed and used by the British Armed Forces, one for training and one for mobilisation. 3.3 Methods of Respirator Haversack Carriage.3.1.5 Should the respirator need to be adjusted at any point whilst wearing, troops were given the following instruction:.II 'Elongated Naval Pattern' Connecting Tube: 2.3 Guards, Valve, Checkplate & Seating.2 Design, Component Designations & Identification.1.3 The Arsine Scare of October 1939 and the EA Container.

Gas mask ww1 b ag