DE555447C - Oxygen cylinder, especially for breathing equipment - Google Patents
Oxygen cylinder, especially for breathing equipmentInfo
- Publication number
- DE555447C DE555447C DED56174D DED0056174D DE555447C DE 555447 C DE555447 C DE 555447C DE D56174 D DED56174 D DE D56174D DE D0056174 D DED0056174 D DE D0056174D DE 555447 C DE555447 C DE 555447C
- Authority
- DE
- Germany
- Prior art keywords
- oxygen cylinder
- bottle
- wall thickness
- valve
- breathing equipment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0104—Shape cylindrical
- F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/05—Size
- F17C2201/058—Size portable (<30 l)
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0602—Wall structures; Special features thereof
- F17C2203/0612—Wall structures
- F17C2203/0614—Single wall
- F17C2203/0617—Single wall with one layer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0305—Bosses, e.g. boss collars
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0323—Valves
- F17C2205/0329—Valves manually actuated
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0382—Constructional details of valves, regulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2209/00—Vessel construction, in particular methods of manufacturing
- F17C2209/22—Assembling processes
- F17C2209/221—Welding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2209/00—Vessel construction, in particular methods of manufacturing
- F17C2209/23—Manufacturing of particular parts or at special locations
- F17C2209/232—Manufacturing of particular parts or at special locations of walls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
- F17C2221/011—Oxygen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0107—Single phase
- F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
- F17C2223/035—High pressure (>10 bar)
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/01—Improving mechanical properties or manufacturing
- F17C2260/011—Improving strength
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/01—Improving mechanical properties or manufacturing
- F17C2260/012—Reducing weight
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2270/00—Applications
- F17C2270/02—Applications for medical applications
- F17C2270/025—Breathing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Description
Sauerstoffflasche, insbesondere für Atmungsgeräte Die Erfindung betrifft eine Sauerstoffflasche, die insbesondere für Atmungsgeräte bestimmt ist. Derartige Flaschen sollen mit Rücksicht auf die Belastung des Gerätträgers ein möglichst geringes Gewicht besitzen und müssen möglichst so billig herstellbar sein, daß sie nach Entleerung weggeworfen werden können. Eine solche Sauerstoffflasche muß ferner sehr hohe Drücke aushalten und mit Rücksicht auf die Anwendung im Atmungsgerätebau möglichst hohe Anforderungen an Sicherheit und Dichtheit erfüllen.Oxygen cylinder, particularly for breathing apparatus The invention relates to an oxygen cylinder specially designed for breathing equipment. Such Bottles should be as low as possible, taking into account the load on the wearer of the device Have weight and must be as cheap to produce as possible that they can be emptied after emptying can be thrown away. Such an oxygen cylinder must also have very high pressures withstand and, taking into account the use in the construction of breathing apparatus, as high as possible Meet safety and tightness requirements.
Diese Forderungen sind bei den bisher bekannt gewordenen Sauerstoffflaschen für Atmungsgeräte, die aus einem Stück durch das sogenannte Kümpeln hergestellt werden. nicht sämtlich erfüllt. Bei diesem Herstellungsverfahren wird bekanntlich ein Hohlkörper über einen Dorn gezogen und dann das Material oben am Hals zusammengezogen, um die nötige Wandstärke für den Einbau es Abschlußventils zu gewinnen. Diese Art der Herstellung der Flaschen verursacht nicht unerhebliche Kosten und bedingt ein nicht geringes Gewicht der Flasche, weil das bei der Boden- und Halsbildung sich anstauende Material nachträglich nicht mehr weggenommen werden kann, ohne daß die Festigkeit gefährdet wird.These requirements apply to the previously known oxygen bottles for breathing devices made from one piece by the so-called Kümpeln will. not all fulfilled. In this manufacturing process is known a hollow body is pulled over a mandrel and then the material is pulled together at the top of the neck, in order to gain the necessary wall thickness for the installation of the shut-off valve. This kind the production of the bottles causes not inconsiderable costs and conditionally not light weight of the bottle, because this is the case with the bottom and neck formation accumulating material can no longer be removed without the Strength is endangered.
Es ist zwar bereits eine Sauerstoffflasche bekannt geworden, die aus mehreren durch Schweißen miteinander verbundenen Teilen besteht. Der Boden und der Deckel dieser Flasche ist auf den zylindrischen Flaschenkörper aufgeschweißt, und das Auslaßventil ist als besonderer Bauteil in den Deckel der Flasche eingesetzt. Da die Schweißtechnik bekanntlich fordert, daß zwei Teile, die miteinander verschweißt werden sollen, ungefähr gleiche Wandstärke aufweisen, wenn die Schweißnaht haltbar sein soll, so ist es- praktisch kaum möglich, bei der bekannten Sauerstoffflasche das Gehäuse des Abschlußventils in den Deckel einzuschweißen. Das Ventilgehäuse müßte vielmehr in den Deckel der Flasche eingeschraubt werden. Eine solche Schraubverbindung kann jedoch undicht werden und erfordert bei der Herstellung der Flasche besondere Arbeitsgänge.It is true that an oxygen cylinder has already become known that is made of consists of several parts connected to one another by welding. The soil and the The lid of this bottle is welded onto the cylindrical body of the bottle, and the outlet valve is inserted as a special component in the lid of the bottle. As the welding technology requires that two parts welded together should have approximately the same wall thickness if the weld seam is durable should be, so it is practically hardly possible with the known oxygen cylinder weld the housing of the shut-off valve into the cover. The valve body rather it would have to be screwed into the lid of the bottle. Such a screw connection however, it can leak and requires special manufacture of the bottle Operations.
Die Erfindung bezweckt nun, eine insbesondere für Atmungsgeräte geeignete Sauerstoffflasche so auszubilden, daß sie den Festigkeitsanforderungen in jeder Beziehung genügt, ein geringes Gewicht hat und billig herzustellen ist. Dies soll gemäß der Erfindung dadurch erreicht werden, daß der obere Teil der Sauerstoffflasche zusammen mit dem Sitz des Verschlußventils und gegebenenfalls dem Auslaßstutzen aus einem Stück hergestellt ist und unten in einen der Flaschenform angepaßten, sich in seiner Wandstärke zu der Wandstärke der Flasche verjüngenden Ansatz ausläuft, der mit dem unten geschlossenen, den Hauptteil der Flasche bildenden Hohlkörper verschweißt ist.The invention now aims to provide a device that is particularly suitable for breathing apparatus Make oxygen cylinder so that it meets the strength requirements in each Relationship is sufficient, light in weight and inexpensive to manufacture. This is supposed to can be achieved according to the invention in that the upper part of the oxygen cylinder together with the seat of the shut-off valve and, if necessary, the outlet connection is made of one piece and below in one of the bottle shape adapted, the wall thickness of the neck tapers to the wall thickness of the bottle, with the hollow body which is closed at the bottom and forms the main part of the bottle is welded.
In der Zeichnung ist ein Ausführungsbeispiel des Erfindungsgegenstandes im Längsschnitt dargestellt. Der Hauptteil der Sauerstoffflasche besteht aus einem unten geschlossenen Hohlkörper i z, der sich in bekannter Weise leicht herstellen läßt. Der Oberteil 3 der Flasche ist zusammen mit dem Sitz 5 des Verschlußventils und bei dem Ausführungsbeispiel auch mit dem Auslaßstutzen 7 aus einem Stück hergestellt. Er läuft unten in einen der Flaschenform angepaßten und sich in seiner Wandstärke zu der Wandstärke des Hohlkörpers 12 verjüngenden Ansatz i aus. Der Oberteil 3 läßt sich sehr einfach als Formkörper pressen. In das auf diese Weise hergestellte Werkstück wird der in dem Sitz 5 des Verschlußventils endigende Kanal2 gebohrt; außerdem wird die zum Auslaßstutzen führende Bohrung 6, die neben dem Ventilsitz 5 ausmündet, angebracht.The drawing shows an exemplary embodiment of the subject matter of the invention shown in longitudinal section. The main part of the oxygen cylinder consists of a hollow body i z, which is closed at the bottom and which is in a known manner can be easily produced. The top 3 of the bottle is together with the seat 5 of the Shut-off valve and, in the exemplary embodiment, also with the outlet connection 7 made in one piece. It runs down into a bottle shaped and adapted approach tapering in its wall thickness to the wall thickness of the hollow body 12 i off. The upper part 3 can be pressed very easily as a molded body. In that on The workpiece produced in this way becomes the one ending in the seat 5 of the shut-off valve Channel2 drilled; in addition, the leading to the outlet hole 6, next to the valve seat 5 opens, attached.
Der Ventilsitz 5 ist durch einen Gewindestöpsel 4 mit Dichtungsstück 13 abschließbar. In einem Schlitz des Gewindestöpsels 4 greift ein Schlüssel b ein, der mittels des Handrades 9 gedreht wird und durch eine Stopfbuchse io mit Dichtscheibe i i abgedichtet ist. Der Oberteil 3 der Flasche ist am Ende des Ansatzes i in der Linie a-b der Abbildung auf elektrischem oder autogenem Wege mit dem unten geschlossenen Hohlkörper 12 verschweißt. Da die Verschweißung zwischen Werkstücken gleicher Wandstärke erfolgt, so ist die Schweißnaht ebenso fest wie eine massive Verbindung.The valve seat 5 is secured by a threaded plug 4 with a sealing piece 13 lockable. A key b engages in a slot of the threaded plug 4, which is turned by means of the handwheel 9 and through a stuffing box io with sealing washer i i is sealed. The top 3 of the bottle is at the end of the approach i in the Line a-b of the figure by electrical or autogenous means with the closed below Hollow body 12 welded. Because the welding between workpieces of the same wall thickness takes place, the weld seam is just as strong as a solid connection.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DED56174D DE555447C (en) | 1928-07-15 | 1928-07-15 | Oxygen cylinder, especially for breathing equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DED56174D DE555447C (en) | 1928-07-15 | 1928-07-15 | Oxygen cylinder, especially for breathing equipment |
Publications (1)
Publication Number | Publication Date |
---|---|
DE555447C true DE555447C (en) | 1932-07-22 |
Family
ID=7056806
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DED56174D Expired DE555447C (en) | 1928-07-15 | 1928-07-15 | Oxygen cylinder, especially for breathing equipment |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE555447C (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1243022B (en) * | 1964-06-08 | 1967-06-22 | Medizintechnik Leipzig Veb | Coupling for connecting the breathing hose to the alkaline cartridge of oxygen breathing apparatus |
DE1299229B (en) * | 1967-01-18 | 1969-07-10 | Draegerwerk Ag | Shut-off valve for respiratory protection device |
EP0050947A2 (en) * | 1980-10-23 | 1982-05-05 | Alcan Aluminium (Uk) Limited | Improvements in high pressure gas cylinders |
DE3427151A1 (en) * | 1984-07-24 | 1986-02-06 | Velimir 7750 Konstanz Tsvetcovicz | Application of pure oxygen in practical spray cans as a luxury and utility product |
-
1928
- 1928-07-15 DE DED56174D patent/DE555447C/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1243022B (en) * | 1964-06-08 | 1967-06-22 | Medizintechnik Leipzig Veb | Coupling for connecting the breathing hose to the alkaline cartridge of oxygen breathing apparatus |
DE1299229B (en) * | 1967-01-18 | 1969-07-10 | Draegerwerk Ag | Shut-off valve for respiratory protection device |
EP0050947A2 (en) * | 1980-10-23 | 1982-05-05 | Alcan Aluminium (Uk) Limited | Improvements in high pressure gas cylinders |
EP0050947A3 (en) * | 1980-10-23 | 1982-09-01 | Alcan Aluminium (Uk) Limited | Improvements in high pressure gas cylinders |
DE3427151A1 (en) * | 1984-07-24 | 1986-02-06 | Velimir 7750 Konstanz Tsvetcovicz | Application of pure oxygen in practical spray cans as a luxury and utility product |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE1814477A1 (en) | Gas lighter | |
DE2832607A1 (en) | ELASTIC DOUBLE RING SEAL | |
DE555447C (en) | Oxygen cylinder, especially for breathing equipment | |
DE2802716A1 (en) | Pressure vessel for fluid or paste - is made of fabric material such as fire-hose sealed at ends by clamps | |
DE2631993A1 (en) | PLASTIC COMPONENTS LIKE HOUSING AND DGL. WITH A REINFORCEMENT PART AT A MOUTHING OF A FLOW OPENING | |
DE2135200A1 (en) | Drain fitting for wash basins, bathrooms and the like | |
DE500125C (en) | Cone valve with two sealing points that come into effect one after the other, the first of which is designed to be resilient | |
DE2014057C3 (en) | Two-hole wall mixer tap | |
DE1075913B (en) | Valve housing with a short overall length | |
DE821745C (en) | Pipe or hose connection | |
DD148091A5 (en) | FITTINGS FOR SHUT-OFF PLUGS | |
DE2062471A1 (en) | Burner valve and foot valve combination | |
DE475589C (en) | Mold box guide consisting of bolts and sleeves | |
DE1042329B (en) | Connection of a reducing valve to the cylinder valve of a dissous gas cylinder | |
DE1145106B (en) | Stop valve for water post with drainage valve | |
AT340326B (en) | ABOVE FLOOR HYDRANT | |
DE815777C (en) | Method of defining penstocks and new penstocks obtained by using this method | |
CH339447A (en) | Device for connecting cylindrical objects | |
DE379482C (en) | Metal mortar socket | |
AT326575B (en) | PLASTER OR INSPECTION TUBE WITH SEALING LID FOR PIPING | |
DE929720C (en) | Container lock with bayonet lock base | |
DE2017079B2 (en) | Connection of an inflator to an inflatable shell of a sea rescue device | |
DE1223770B (en) | Shower head, especially of hand or hose showers, with overpressure protection | |
AT129857B (en) | Self-donor. | |
DE201700C (en) |