The
Tissot large box respirator is composed by a rubber sheet mask including a
metalic system of pipes allowing the inhaled air to flow against the
eyepieces
to prevent the gass eyepieces to mist.
As
the mask is made or soft rubber material,to avoid the mask to collapse
against the face, inhibiting the breathing, a kind of wire spring, set in
the exhale tube, rests against the face of the wearer under the nose and
the mouth.
The inlet tube is connected to the hose by means
of a spring
fastener. It is connected to the filter by
a threaded fitting.
The filter is worn on the back
by means of a leather
harness.
The
exhaust pipe is bended up and is completed by a flutter valve.
