CH318803A - Device for generating directed, symmetrical to the vertical axis circulation flows of gases, vapors and liquids - Google Patents
Device for generating directed, symmetrical to the vertical axis circulation flows of gases, vapors and liquidsInfo
- Publication number
- CH318803A CH318803A CH318803DA CH318803A CH 318803 A CH318803 A CH 318803A CH 318803D A CH318803D A CH 318803DA CH 318803 A CH318803 A CH 318803A
- Authority
- CH
- Switzerland
- Prior art keywords
- individual elements
- dependent
- vertical axis
- individual
- support members
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/32—Packing elements in the form of grids or built-up elements for forming a unit or module inside the apparatus for mass or heat transfer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/16—Fractionating columns in which vapour bubbles through liquid
- B01D3/22—Fractionating columns in which vapour bubbles through liquid with horizontal sieve plates or grids; Construction of sieve plates or grids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/16—Fractionating columns in which vapour bubbles through liquid
- B01D3/22—Fractionating columns in which vapour bubbles through liquid with horizontal sieve plates or grids; Construction of sieve plates or grids
- B01D3/225—Dual-flow sieve trays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/16—Fractionating columns in which vapour bubbles through liquid
- B01D3/24—Fractionating columns in which vapour bubbles through liquid with sloping plates or elements mounted stepwise
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J10/00—Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particles, or apparatus specially adapted therefor
- B01J10/02—Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particles, or apparatus specially adapted therefor of the thin-film type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/24—Stationary reactors without moving elements inside
- B01J19/2415—Tubular reactors
- B01J19/2425—Tubular reactors in parallel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/24—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique
- B01J8/44—Fluidisation grids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00074—Controlling the temperature by indirect heating or cooling employing heat exchange fluids
- B01J2219/00076—Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements inside the reactor
- B01J2219/00078—Fingers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00159—Controlling the temperature controlling multiple zones along the direction of flow, e.g. pre-heating and after-cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
- B01J2219/322—Basic shape of the elements
- B01J2219/32203—Sheets
- B01J2219/32206—Flat sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
- B01J2219/322—Basic shape of the elements
- B01J2219/32203—Sheets
- B01J2219/32213—Plurality of essentially parallel sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
- B01J2219/322—Basic shape of the elements
- B01J2219/32203—Sheets
- B01J2219/32237—Sheets comprising apertures or perforations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
- B01J2219/322—Basic shape of the elements
- B01J2219/32203—Sheets
- B01J2219/32255—Other details of the sheets
- B01J2219/32262—Dimensions or size aspects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
- B01J2219/322—Basic shape of the elements
- B01J2219/32203—Sheets
- B01J2219/32265—Sheets characterised by the orientation of blocks of sheets
- B01J2219/32268—Sheets characterised by the orientation of blocks of sheets relating to blocks in the same horizontal level
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
- B01J2219/322—Basic shape of the elements
- B01J2219/32286—Grids or lattices
- B01J2219/32289—Stretched materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
- B01J2219/324—Composition or microstructure of the elements
- B01J2219/32483—Plastics
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Description
Vorrichtung zur Erzeugung von gerichteten, zur Vertikalachse symmetrischen Zirkulationsstromungen von Gasen, DÏmpfen und Flüssigkeiten
Zur technischen Durchführung von direk ten, Gegenstromprozessen, wie z. B. Destillation, Absorption, Extraktion, Gasreinigtmg, Kiih- lung, werden vertikal angeordneteund mei stens zylindrisch ausgebildete Apparate, sog.
Kolonnenapparate, gebraueht, durch welehe die Medien z. B. Luft und Wasser geleitet werden. Diese Medien werden tangential in die Apparatur eingeführt und durch eingebaute Umlenkvorrichtungen in Zirkulation gesetzt.
Die erfindungsgemässe Vorrichtung zur Erzeugung von gerichteten, zur Vertikalachse symmetrischen Zirkulationsstromungen von Gasen, Dampfen und Fl ssigkeiten, weist eine horizontale Bodenfläche mit einer Anzahl von gegen die FlÏche geneigt gerichteten Durch- lassstellen auf und zeichnet sich dadurch aus, dass die Bodenfläche in Einzelelemente aufgeteilt und jedes Einzelelement auf vertikalen Stutzorganen gelagert ist. Vorzugsweise kön- nen die. Stützorgane symmetrisch um die Ver tikalaehse der Bodenfläche angeordnet sein.
Ausführungsformen der Vorrichtung sind beispielsweise in der Zeiehnung dargestellt, und zwar zeigen :
Fig. la--lu verschiedene Ausbildungen einer Fläche,
Fig. 2a-2h zugeh¯rige FlÏchenelemente in Einzeldarstellung, in vergrössertem Massstab gezeichnet,
Fig. 3-6 Einzelheiten der Befestigung von verschiedenen Elementen an Tragorganen.
Gemäss dem ersten Ausführungsbeispiel ist eine Vorrichtung vorgesehen, welche übereinander angeordnete B¯den oder Flächen aufweist, die den bekannten Austauschb¯den entsprechend mitDurchtrittsschlitzen ausgerüstet sind. Eine erste Ausführung einer solchen Bo denfläche ist in den Fig. 1a-1d dargestellt Die gezeigte Bodenfläche besteht nicht aus einem einzigen Teil, sondern ist aus Elementen zu- sammengesetzt, die auf vertikalen Stützorga- nen gelagert sind. Die Art und Weise der La gerung ist spÏter beschrieben.
Die Elemente sind im Grundriss z. B. gleichzeitige Dreiecke, Fig 2a-2d, die mit durch gestrichelte Linien dargestellten Sehlitzen alllsgeriistet sind. Diese bilden gegen die Bodenfläehe geneigte Durchlassöffnungen, die eine Ablenkung des von wten nach oben strömenden Mediums bewirken, so dass letztere annähernd parallel zur Bodenfläche aus den Schlitzen ausströmt. Die Elemente unterschei- den sieh nur dureh die Schlitzrichtung, welche mittels Richtungspfeilen angedeutet sind. Anstatt Dreiecke k¯nnen auch Vierecke Verwen- dung finden, wie aus den Fig. 2e-2h ersichtlich ist.
Diese Vierecke -weisen -wiederum gegen die Bodenfläehe geneigte schlitzartige Offnun- gen auf, die innerhalb eines Vierecks gleichgerichtet sind Aus den dargestellten Dreiecken und Vierecken lassen sich BodenflÏchen in einfacher Weise zusammenstellen Zweckmϯi gerweise werden die Einzelelemente so ge wählt, dass bei der durch die Fläche bewirkten Umlenkung des Strömungsmediums die tan gentiale oder radiale Komponente bevorzugt. wird.
In der Fläche gemäss Fig. la ist die radiale Komponente bevorzugt, die Fläche gemäss Fig. le ist rein radial ausgerichtet, während die Fläche gemäss Fig. lb mit Schlitzen versehen ist zur Erzielung einer annähernd tangentialen Strömung. InderFig.lo!ist die Fläche so ausgebildet, dass bei der Strömung die rein tangentia. le Richtung bevorzugt. wird.
Die Einzelelemente der Grundflächen sind in den zugehörigen Fig. 2a-2h dargestellt. Wie ferner aus den Fig. la-lu ersichtlich ist, k¯nnen innerhalb einer FlÏche sowohl Dreieck- als auch Viereekelemente Anwendung finden.
Die relativ kleinen Flächenelemente sind mit wenig Materialabfall herstellbar.
Die vorbeschriebene Auflosung der Loden flache in Flächenelemente gleicher Form und Grosse gestattet die Auflagerung derselben reihenwesie übereinander, mit wählbarem ge genseitigem Abstand auf gemeinsamen, durch ihre Eckpunkte oder zentral durch sie hindurchgeführte und vertikal angeordneten Stützorganen.
Gemäss Fig. 3 sind die Elemente a und b dreieckförmig ausgebildet und weisen an ihren Ecken kreisbogenförmige Ausstanzungen auf, deren Durchmesser dem Aussendurchmesser der Heiz-bzw. Kühlrohre 2, 3 entspricht. Die kreisbogenförmig ausgesparten Ecken können durch Stanzen, Pressen oder Giessen hergestellt werden. In der Fig. 4 sind viereckige Flächenelemente a und b gezeigt, die wiederum kreisförmig ausgestanzte Ecken aufweisen, deren Durchmesser dem Aussendurchmesser der Heiz- bzw K hlrohre 2, 3 entspricht.
Die Befestig mg der Elemente ist auch aus den Fig. 5 und 11 ersichtlich. Die genannten Elemente werden im gewünschten gegenseiti- gen Abstande voneinander mit wahlweise gleicher oder wechselnder Ausrichtung ihrer Durchlassöffnungen auf Zuganker l aufge- reiht, welche sie im Fläehenmittelpunkt senk reeht. durchdringen Ein seitliches Verdrehen der Flächenelemente wird durch die gleich- zeitig als Führung dienenden Heiz-bzw. Kühl- rohre 2 ; 3 verhindert Mit a und sind FlÏ chenelemente mit versehiedenen Schlitzrich- tungen bezeichnet, die in dem zwischen den Heiz- bzw.
K hlrohren 2 vorhandenen freien Raum in wechselnder Reihenfolge überein ander angeordnet sind, so dass sich die Aus stromungsrichtung der Medien etagenweise ändert.
Device for generating directed circulation flows of gases, vapors and liquids symmetrical to the vertical axis
For the technical implementation of direct th, countercurrent processes, such. B. Distillation, absorption, extraction, gas cleaning, cooling, are vertically arranged and mostly cylindrical devices, so-called.
Column apparatus, used, through which the media z. B. air and water are passed. These media are introduced tangentially into the apparatus and put into circulation by built-in deflection devices.
The device according to the invention for generating directed circulation flows of gases, vapors and liquids symmetrical to the vertical axis has a horizontal floor surface with a number of passage points inclined towards the surface and is characterized in that the floor surface is divided into individual elements and each individual element is mounted on vertical support members. Preferably, the. Support members can be arranged symmetrically around the ver tikalaehse of the floor surface.
Embodiments of the device are shown for example in the drawing, namely show:
Fig. La - lu different configurations of a surface,
2a-2h associated surface elements in individual representation, drawn on an enlarged scale,
Fig. 3-6 Details of the attachment of various elements to supporting members.
According to the first exemplary embodiment, a device is provided which has floors or surfaces arranged one above the other, which are equipped with passage slots in accordance with the known exchange floors. A first embodiment of such a floor surface is shown in FIGS. 1a-1d. The floor surface shown does not consist of a single part, but is composed of elements that are mounted on vertical support members. The method of storage is described later.
The elements are z. B. Simultaneous triangles, Fig. 2a-2d, which are all-supported with seat braces shown by dashed lines. These form passage openings inclined towards the bottom surface, which deflect the medium flowing upwards from the bottom so that the latter flows out of the slots approximately parallel to the bottom surface. The elements can only be distinguished by the direction of the slot, which is indicated by the directional arrows. Instead of triangles, quadrilaterals can also be used, as can be seen from FIGS. 2e-2h.
These quadrilaterals have, in turn, slit-like openings inclined towards the bottom surface, which are aligned within a quadrilateral. Bottom surfaces can be put together in a simple manner from the triangles and quadrilaterals shown. The individual elements are expediently selected so that the the surface caused deflection of the flow medium, the tangential or radial component is preferred. becomes.
In the area according to FIG. 1 a, the radial component is preferred, the area according to FIG. 1e is aligned purely radially, while the area according to FIG. 1 b is provided with slots to achieve an approximately tangential flow. In Fig.lo! The surface is designed in such a way that the purely tangentia. le direction preferred. becomes.
The individual elements of the base areas are shown in the associated FIGS. 2a-2h. As can also be seen from Figs. La-lu, both triangular and quadrangular elements can be used within a surface.
The relatively small surface elements can be produced with little material waste.
The above-described resolution of the loden flat in surface elements of the same shape and size allows the same rihenwesie to be superimposed, with selectable ge mutual spacing on common, through their corner points or centrally guided through them and vertically arranged support members.
According to FIG. 3, the elements a and b are triangular and have circular arc-shaped punchings at their corners, the diameter of which corresponds to the outer diameter of the heating or heating element. Cooling tubes 2, 3 corresponds. The corners recessed in the shape of a circular arc can be produced by punching, pressing or casting. In FIG. 4, square surface elements a and b are shown, which in turn have circular punched-out corners, the diameter of which corresponds to the outer diameter of the heating or cooling pipes 2, 3.
The fastening mg of the elements can also be seen from FIGS. 5 and 11. The elements mentioned are lined up at the desired mutual spacing from one another with either the same or alternating alignment of their passage openings on tie rods 1, which they perpendicular to the center of the area. penetrate A lateral rotation of the surface elements is caused by the heating or heating elements, which also serve as guides. Cooling tubes 2; 3 prevents with a and are surface elements with different slot directions, which are located in the area between the heating resp.
Cooling pipes 2 existing free space are arranged one above the other in alternating order, so that the direction of flow of the media changes floor by floor.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH744906X | 1952-03-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH318803A true CH318803A (en) | 1957-01-31 |
Family
ID=4533416
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH318803D CH318803A (en) | 1952-03-07 | 1952-03-07 | Device for generating directed, symmetrical to the vertical axis circulation flows of gases, vapors and liquids |
Country Status (6)
Country | Link |
---|---|
BE (1) | BE518216A (en) |
CH (1) | CH318803A (en) |
DE (1) | DE950905C (en) |
FR (1) | FR1075488A (en) |
GB (1) | GB744906A (en) |
NL (2) | NL102607C (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3062517A (en) * | 1956-09-07 | 1962-11-06 | Shell Oil Co | Gas-liquid contacting apparatus |
EP0568713B1 (en) * | 1992-05-05 | 1996-03-27 | Deggendorfer Werft Und Eisenbau Gmbh | Support grid for a tube bundle |
US6425574B1 (en) * | 1998-12-18 | 2002-07-30 | Air Products And Chemicals, Inc. | Mixed-resistance structured packing |
GB201019919D0 (en) * | 2010-11-24 | 2011-01-05 | Doosan Power Systems Ltd | Column |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE822088C (en) * | 1951-10-11 | Olympia Werke West G M B H | Control key for office machines, especially typewriters | |
DE162563C (en) * | ||||
US729009A (en) * | 1902-07-01 | 1903-05-26 | Henry M Sutton | Process of roasting ores. |
DE498225C (en) * | 1926-11-16 | 1930-05-19 | I G Farbenindustrie Akt Ges | Process for producing gases |
NL42761C (en) * | 1935-11-06 | |||
DE672665C (en) * | 1936-02-10 | 1939-03-08 | Anweiler Walter | Ink feed for fountain pens with balancing chambers running lengthways on both sides and on the underside of the air and ink duct |
FR837904A (en) * | 1937-06-16 | 1939-02-23 | Metallgesellschaft Ag | Apparatus for performing chemical reactions |
FR914742A (en) * | 1939-06-14 | 1946-10-16 | Socony Vacuum Oil Co Inc | Method and apparatus for treating finely divided solids |
NL68466C (en) * | 1947-07-29 | |||
AT169565B (en) * | 1949-04-23 | 1951-11-26 | Westfalia Separator Ag | Method and device for countercurrent treatment of liquids |
-
0
- NL NL106401D patent/NL106401C/xx active
- NL NL102607D patent/NL102607C/xx active
- BE BE518216D patent/BE518216A/xx unknown
-
1952
- 1952-03-07 CH CH318803D patent/CH318803A/en unknown
-
1953
- 1953-03-05 FR FR1075488D patent/FR1075488A/en not_active Expired
- 1953-03-06 GB GB6303/53A patent/GB744906A/en not_active Expired
- 1953-03-07 DE DEK17292A patent/DE950905C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NL106401C (en) | |
GB744906A (en) | 1956-02-15 |
NL102607C (en) | |
BE518216A (en) | |
DE950905C (en) | 1956-10-18 |
FR1075488A (en) | 1954-10-18 |
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