DE153342C - - Google Patents

Description

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IMPERIAL

PATENT OFFICE

The subject of the invention device for breathing in with harmful Gases, especially smoke, used in rooms that are known per se to prevent the To enable breathing, namely the cleaning of the smoke air by filtering and passing it through through liquids, the rebreathing of the exhaled air, the supply of oxygen from a container with ίο compressed oxygen, the suction of fresh air from the open air using an appropriately long hose line. These However, means are combined with one another according to the invention in such a way that, depending on the need one or the other means is eliminated, and furthermore for each case the most effective interaction of the various Means can be achieved and that ultimately in no case a failure of one of the means poses a risk to the device using person enters.

In the drawing, the device is illustrated in two embodiments.

Fig. Ι is a top view of the first embodiment,

FIG. 2 is a section along line AB of FIG.

3 shows the front view of the first embodiment,

4 shows a section along line CD in FIGS

Fig. 5 is a section along line GH,

6 shows a section along line EF (mirror image), ".>.

7 is a side view of the second embodiment,

Fig. 8 is a top view of the same and

9 shows a diagram for a better understanding of the two embodiments.

As FIG. 9 shows schematically, the smoke air enters the device at α , while the passage into the hose leading to the mouth takes place at b. The smoke air goes from α first through a pre-filter I, then one after the other through dry filters 2 and 3, then through the liquid container 4 into a breathing bag 5, then through a soda lime filter 6, again through a liquid container 7 and finally at b into the breathing tube. In this way, the smoke air is cleaned in a known manner.

The exhaled air returning to b is, as indicated by line c , first passed into the breathing bag 5, where it mixes with the smoke air that has already been pre-cleaned at this point and goes with the latter through the soda lime filter 6 and the liquid container 7, so that the Carbonic acid is bound and the temperature is lowered. At b , the exhaled air made breathable again in this way is inhaled anew together with the completely purified smoke air.

The oxygen is a compressed oxygen-containing bottle 9 under the appropriate Removed pressure reduction, passed into an expansion tank 10 and

then inside the filter 6 with the purified smoke air and the exhaled air Air mixed.

If you want to supply fresh air from the open air through a hose, so it is introduced into the filter 2 and then describes the rest of the path of the Smoke air.

In the second embodiment comes

ίο the breathing bag 5 is omitted because the exhaled air, as indicated by line d , is expelled at the confluence of the smoke air α , but is sucked in again together with the smoke air during the subsequent inhalation. This arrangement has the advantage that the exhaled air cools down better on the long way than if it is only passed through 5, 6 and 7.

The different containers are 1 to IO arranged in such a way that it takes up little space and yet in all its parts Easily accessible device is created, which can be comfortably strapped to the back can. The connections and connections are designed in such a way that in the shortest possible time Time the switching on and off of one or the other means to enable the Breathing is to be effected and that in particular also the regulation of the oxygen supply depending on if necessary, done in the most convenient manner during the use of the device can.

In the first embodiment (FIGS. 1 to 6), the oxygen tank 9 is in the Arranged in the middle, while on one side the filters 2, 3 and the liquid container 4 and on the other side of the breathing bag 5, the soda lime filter 6 and the liquid container 7 are housed. Of the Expansion tank 10 is designed as a foot for the oxygen bottle 9 and to this Purpose with an upward protruding edge /. The pre-filter 1 is also in the middle of the device, in front of the oxygen cylinder 9.

The smoke air entering at α goes through the prefilter 1 and line g to the filter 2, from here through line h to the filter 3, then through line i to the liquid container 4, through line k to the one made of rubber and arranged within a closed cylinder Breathing bag 5, through line m to the soda lime filter 6, through line η to the liquid container 7 and finally after passing through the inhalation valves o (Fig. 6) to the hose b leading to the mouth.

The exhaled air returning through the hose b when exhaling is passed through line c and the opening exhalation valves ρ (the inhalation valves 0 close at the same time) to the breathing bag 5 and then with the help of lines m and η through soda lime filter 6 and liquid container 7 in a cleaned Conditions returned to b .

As can be seen in particular from FIGS. 1, 2 and 3, the oxygen cylinder 9 is provided with a pressure reducing valve and two pressure gauges which indicate the pressure in the cylinder and behind the pressure reducing valve. After the oxygen bottle has been placed in the rim / of the expansion tank 10, it is connected to the tube q by the union nut r . The pressure reducing valve is then set to a certain pressure (approximately Y ₃ atmospheric pressure) and the cock s is opened. The oxygen then goes through the second pipe t and the transfer u into the expansion tank 10. From this a pipe ν leads to the soda lime tank 6. In this pipe a tap w is switched on, which after the device is buckled on the side of the the latter using person finds that it can be comfortably grasped by hand. From the filter 6 the oxygen goes through line η to the container 7 and finally to the mouth tube b.

After a hose has been screwed onto the socket χ, the fresh air enters immediately behind the pre-filter and then follows the same path as the smoke air.

Usually, however, the nozzle χ is closed by a cap and no hose leading into the open air is attached. The three means then work together, cleaning the smoke air, making the exhaled air breathable again and supplying oxygen.

To fill the bottle 9 with oxygen, the union nut r is loosened, the bottle is removed and the tap s is closed.

Operation and handling of the second embodiment (FIGS. 7 and 8) is essentially the same. This device differs from the first only in that the breathing bag 5 is omitted and the exhaled air is guided to α by means of line d and is sucked in again when inhaled.

The device is buckled up by means of loops yy through which straps are passed.

Claims (4)

Patent Claims: i. Apparatus for breathing in rooms filled with smoke or the like, thereby marked that in her As is known, the smoke air is passed through cleaning layers (ι, 2, 3, 4) and carbonic acid-binding filters (6) and the exhaled air is returned through a special pipe (c) to the carbonic acid-binding filters and is sucked in through the latter together with the pre-cleaned smoke air , and that at the same time a pipe (v) which can be closed by means of a tap or the like is provided, through which artificial oxygen can be supplied in a controllable amount from a container (9). 2. Embodiment of the device according to claim 1, characterized in that for the purpose of convenient control of the oxygen supply during use of the device, the oxygen line (ν) led to the vicinity of the hand of the person using the device and here with an adjustable tap (w) or the like. is provided. 3. Embodiment of the device according to claim 1, characterized in that a connection piece (x) for a hose leading into the open is arranged in such a way that the fresh air describes the same path as the smoke air. 4. Embodiment of the device according to claim 1, characterized in that the pipeline for the exhaled air (d) is returned to the entry point of the smoke air (a) , so that the exhaled air is ejected from the device, but immediately again with the smoke air is sucked back. 1 sheet of drawings. Berlin, printed in the Reichsdruckerei.