IPA series oxygen rebreathers
(from achieves of the
Military and historical museum of artillery, engineering armies
and communication armies in Russia)
Oxygen respiratory devices of the IPA series were developed in
The series consisted of three models differing mainly by the of
oxygen addition mechanism.
The first sample of the device IPA-1 had no oxygen dosage oxygen
mechanism. The oxygen addition was simply done by opening the
valve of the rebreather. The second model of the device of the
end of the 1930th years was- IPA2 It
already had an oxygen
dosage mechanism (a
reducer from the bottle continuous
supplied oxygen in the lung). Further development of devices of
the IPA series, and then ISA - went on the way of improvement of
separate lungs, and as a whole the shape of breast oxygen
devices didn't change until the second half of the 1950s. Before
the emersion of the last breast device IDA-57, and the device
IPA-3 was used in engineering armies of Armed forces up to the
end of the 1940s/
Easy diving device IPA-2
The device IPA-2 is developed in the mid-thirties and has the
constructive signs which have remained in the subsequent models,
namely: the reducer providing continuous supply of oxygen
through a special dosage device.
The device equipped with oxygen and an absorber, weighs 7,8 kg.
In water with the filled oxygen in the counterlung the device
decreases in weight to 7 kg.
Also gains positive buoyancy, depending on bag filling - to 7
IPA-2 sizes: height - 370 mm, width - 370 mm, thickness - 120
a) respiratory bag;
b) the mechanism for continuous supply of oxygen;
c) oxygen cylinder with the dosage mechanism
f) breathing hoses with mouthpiece,
bandage and nasal clip (or the mask combining these details);
g) the case of the device on which all parts are mounted;
h) diving points.
In the package of IPA-2 are included: tool bag with keys and a
set of spare details and a bag for carrying the device.
Thanks to Alexander Lebedev