US2916108A - Metal window wall - Google Patents

Metal window wall Download PDF

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Publication number
US2916108A
US2916108A US523845A US52384555A US2916108A US 2916108 A US2916108 A US 2916108A US 523845 A US523845 A US 523845A US 52384555 A US52384555 A US 52384555A US 2916108 A US2916108 A US 2916108A
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United States
Prior art keywords
stanchions
wall
hollow
window
stanchion
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Expired - Lifetime
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US523845A
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English (en)
Inventor
Gartner Josef
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Josef Gartner and Co
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Josef Gartner and Co
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    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/14—Measures for draining-off condensed water or water leaking-in frame members for draining off condensation water, throats at the bottom of a sash
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/88—Curtain walls
    • E04B2/96—Curtain walls comprising panels attached to the structure through mullions or transoms

Definitions

  • This invention relates to a wall construction of the type composed of metal window elements which are secured ,to the ceilings of the stories of a building so as to form the front or facade wall thereof,
  • Another object of the invention is to provide means conducive to a novel window wall structure which is simple to produce and to ybe assembled with minimum expenditure of material, labor and time.
  • l.Still another object of the invention is to provide .means ensuring a reliable packing at the joints of a wall structure.
  • a still further object of the invention is to provide means meeting both the static and the aesthetic requirements of a wall structure.
  • a wall element consists of several hollow stanchions which are iixedly interconnected by crossbars and xedly secured at one end only to a horizontal floor and ceiling element of a story while having at their opposite ends a hollow fitting piece by which they are slidably mounted in the stanchions of the ⁇ adjacent wall element; moreover, at the sides of each wall element hollow half-stanchions are provided which are formed on their inner and outer sides with flanges directed parallel to the plane of the wall and disposed in ,overlapping relationship with the iianges of thehollow half-stanchions .of the two adjacent wall elements, in such a way that in fers to the :Hoor or to the ceiling of a story which, however, actssimultaneously as a ceiling or floor for the vertically adjacent lower or upper story, respectively.
  • the hollow stanchions are profiled in such a way that they serve as rabbets for the window frames and window sashes.
  • Fig. l is a front elevational view of a part of a metal window wall
  • Fig. 2 is a vertical section through this wall, taken on the line lI--II of Fig. l,
  • Fig. 3 is a diagrammatic View, on a reduced scale, of a detail of the embodiment shown in Fig. l,
  • Fig. 4 is a vertical section taken on line IV-IV of Fig. 1,
  • Fig. 5 is a horizontal section taken on line V-V of Fig. 4,
  • Fig. 5a is a fragmentary vertical sectional View of two half stanchions of the metal window wall of Fig. l and as seen in Fig. 5 and shown in spaced apart position,
  • Fig. 5b is a top plan View of Fig. 5a partly in section, the section being taken along lines Sb-Sb of Fig. 5a.
  • Fig. Sc is a top plan view similar to that of Fig. 5b with the half stanchions seen in en-gaged position,
  • Fig. 6 is a section taken on line Vl-VI of Fig. l,
  • Fig. 7 is a horizontal section taken on line VII-VII of Fig. 6, and
  • Figs. 8 and 9 are horizontal sections taken on lines VlII-VIII or IX-IX of Fig. 1,
  • Fig. 10 is a vertical section at a window opening
  • Fig. 11 is a horizontal section on line XI-XI of Fig. 10.
  • the metal window wall is formed of hollow stanchions 3 and 4 and crossbars 5 and comprises window sashes 1 and iixedly arranged windows 2.
  • this metal window wall forms the facade or front wall of a building, which Iis composed of larger wall elements in place of conventional outer wall structure.
  • the wall elements are secured to the ceilings 6 of the stories which ceilings are provided with parapets '-7, the hredly arranged glass windows 2 being provided in front of the ceilings 6 ⁇ and parapets 7.
  • Each wall element consists of two hollow central stanchions 3 and two hollow half stanchions 4a and 4b, said four stanchions being xedly interconnected by the crossbars 5. ln the embodiment as shown the height of each wall element corresponds to theheigh-t of the story. Such a wall element may be produced also in larger dimensions, e.g., in the size 'of 4 X 4 meters.
  • Figs. 1 ⁇ and 3 the upper and lower limiting edges of the stanchions 3 and 4 are denoted a and b, or c and d, respectively.
  • a and b the upper and lower limiting edges of the stanchions 3 and 4 are denoted a and b, or c and d, respectively.
  • a larger wall element containing several windows or window sashes is obtained, which element is illustrated in Fig. 3 by hatching.
  • both the stanchions 3 and the half stanchions 4a and 4b form a substantially T- shaped hollow profile.
  • rabbet surfaces are formed which render it possible to use these hollow stanchions 3 or 4a, 4b simultaneously as rabbets for window frames S (Figs. Sand 7) or window sashes 9' (Figs. 8 and 9).
  • the rabbet surfaces for the window frames there are provided vertical, advantageously dovetail-shaped grooves 10 serving, as in case of the penetration of water, as collecting Iand draining channels, or, if desired, for the insertion of packing strips.
  • both the stanchions 3 and the half stanchions 4 at their lower ends are supported by, as for example, ⁇ xedly connected to the -story ceiling.
  • a strut 11 or 12 is secured to the lower end of the stanchions 3 or 4a by means of screws 13 and an intermediate member lift.
  • Welded to a base plate 1S of the ceiling 6 of the story is a T-piece le on both sides of which a pair of vertical flat bars All is adjustably secured by means of cross slots andlongitudinal slots i9. ⁇ The shplate 2t? of the struts 11 or 12 is inserted between these flat bars and secured by means of a screw bolt 2l.
  • lt is important that the stanchions 3 yand 4 are supported by the ceilings of the stories at one end only, at 2l, while the upper ends of these stanchions are mounted so as to be freely slidable in order to allow for elongation as a result of temperature changes.
  • a hollow .fitting piece 22 corresponding exactly to the prole of the stanchion is inserted at the upper end of the stanchion 3 and secured to the stanchion, eg., by means of screws 23.
  • the projecting part of this fitting piece 22 is slidably mounted in the end of the adjacent stanchion.
  • the upper and lower edges 2d and 25 of this fitting piece 22 are outwardly and downwardly inclined, in such a way that water which has entered into the stanchions is drained to the outside along these edges.
  • the stanchion 3 ioreover is cut out approximately at right angles at the upper end of the outer side, in such a way that the verti- ⁇ cai edges 25 of this cutout are located in front of the rabbet surfaces 27 of the windows and the horizontal edges of the cutout 23 are also inclined to the outer and lower sine.
  • the lower end of the stanchion 3 is cut out according to Fig. 6.
  • the crossbars 5 are provided with grooves or recesses Sil for the window panes 2 in such a way that in case of expansion of the upper end of the stanchion the ⁇ window pane is able to slide in the recess in the direction of -arrow A.
  • the half-stanchions 4 shown in Figs. 4 and 5 are similarly shaped. Accordingly, similar hollow fitting pieces 3i and 32 are secured in tbe upper ends of the half-stanchions da and db, and the ends of the stanchions are cut out in a similar way as described above.
  • the construction and joint lof the half-stanchions shown in Figs. 4 and 5 permits not only such vertical expansion, but in addition permits a free expansion in a horizontal direction.
  • the half stanchions at their inner and outer sides are formed with flanges 33a and 34, or 35 and 36, directed parallel to the wall plane and overlapping each other as seen in Fig. 5.
  • the half-stanchion 4b is provided on the cuter side with a U-shaped double ange 33a, 33b for mutual engagement with a flange 3d of halfstanchion 42, as shown.
  • Figs. a, 5b and 5c illustrate, respectively, spaced apart and interengaging positions of half stanchions 4a, 4b, the latter stanchion being provided with a cutout 35a in flange 35 to embracingly engage member 1d as more clearly depicted in Fig. 5c.
  • Figs. l0 ⁇ and ll illustrate the manner in which a tight joint is achieved between the window wall and the masonry or brickwork 39 on the window opening.
  • a metal profile frame 4d is secured on the brickwork in the window opening, which frame has a packing flange 41 both on its top side (Fig. l0) and on its lateral side (Fig. ll), said ange being parallel to the window plane and engaging in a groove arranged in the window wall and lled up with sealing putty.
  • Said proled frame is screwed to an annularclaw or strap which is cemented in a corresponding recess M of the masonry.
  • a Z-shaped profile 45 is secured to the window wall or to the profile 37 for forming the packing groove.
  • This prole, or the packing groove, is dimensioned in such a way that the window wall is permitted to slide, especially within its wall plane,
  • a second ange 46 is provided on the profiled frame 4G parallel to the sealing ange 46, said ange 46 engaging the profile 4S and thus covering the packing groove.
  • a groove which is formed by two webs 47 and adapted to be filled up by putty 48.
  • the proled frame 40 extends downwards up to the parapet plate 52.
  • the hollow stanchion 3 is fixedly connected to the masonry 53 while the remaining stanchions of this wall element, among others the half stanchion 4a, are free to shift in case of thermal expansion.
  • the metal window wall according to the invention meets with all practical requirements. It permits the industrial manufacture and mass production of wall elements in relatively large dimensions. Since these wall elements are merely interlocked with the stanchions 3 and 4 and each wall element is fastened on the story l, with four screw bolts only, according to Figs. 4 and 6,
  • a continuous metal-framed glass wall adapted to form the external wall of a building of the multi-storied type building having ceilings unsupported by the outer wall of the building; comprising a plurality of wall elements, each wall element including a plurality of hollow stanchions, cross bars interconnecting said stanchions, each stanchion being supported at one end only by a horizontal floor and ceiling element of a building in front of said element, each stanchion being vformed at its opposite end with a hollow fitting piece for slidable mounting in the stanchions of the vertically adjacent wall element, and hollow half stanchions provided on the lateral opposite sides of the wall element and formed on their inner and outer vsides with flanges ⁇ telescopingly slidably engaging and overlapping the flanges of the hollow half stanchions of the two laterally adjacent wall elements so that upon expansion and contraction of the wall elements the cooperating half stanchions are able to slide freely relative to each other.
  • each story including a horizontal floor and ceiling element; a continuous metal-framed glass wall forming the external wall of said building and comprising a plurality of prefabricated external wall elements, each wall element including a plurality of hollow stanchions, cross bars secured to said stanchions for interconnecting same, each stanchion being supported at one end only by the horizontal floor and ceiling element of a story in front of said element, each stanchion being formed at its opposite end with a hollow fitting piece for slidable mounting in the stanchions of the vertically adjacent wall element, hollow half-stanchions provided on the lateral opposite sides lof the wall element and formed on their inner and outer sides with flanges telescopingly slidably engaging .and overlapping with the lianges of the hollow half stanchions of the two laterally adjacent wall elements so that upon expansion of the wall elements the cooperlating half stanchions are able to ⁇ slide freely relative to each other, window frames and window sashes, said hollow sta
  • each story including a horizontal floor and ceiling element, a continuous metal-framed glass wall forming the external wall of said building comprising a plurality of prefabricated external wall elements, each wall element including a plurality of hollow stanchions, cross bars secured to said stanchions for interconnecting same, each stanchion being xedly connected at one end only to the horizontal oor and ceiling element of a story in front of said element, each stanchion being formed at its opposite end with a hollow tting piece for slidable mounting in the stanchions of the vertically adjacent wall element, hollow half stanchions provided on the lateral opposite sides of the wall element and formed on their inner and outer sides with flanges telescopingly slidably engaging and overlapping with the flanges of the hollow half stanchions of the two laterally adjacent wall elements so that upon expansion and contraction of the wall elements the cooperating half stanchions are able to slide freely in relation to each other, window frames and window sashes, said hollow hollow tting piece for slidable mounting in the
  • a wall element for continuous metal-framed glass walls adapted to form the external wall of a building of the multi-storied type, said wall element comprising a plurality of hollow stanchions, cross bars permanently secured to the stanchions for interconnecting same, each stanchion being adapted to be supported at one end only by the horizontal floor and ceiling element of a story in front of the same, each stanchion being formed at its opposite end with a hollow fitting piece for slidable mounting in the stanchions of the vertically adjacent wall element, and hollow half stanchions provided on the lateral opposite sides of the wall element and formed on their inner and outer sides with ilanges which are parallelly directed to the wall plane and adapted to overlap with the flanges of the hollow half stanchions of the Itwo laterally adjacent wall elements.
  • each story including a horizontal floor and ceiling element, a continuous metal-framed glass wall forming the external wall of ysaid building and comprising a plurality of prefabricated'external wall elements, each wall element including a plurality of hollow stanchions, cross bars secured to said stanchions for interconnecting same, each stanchion being tixedly connected at one end only to the horizontal floor and ceiling element of a story in front of .said element, each stanchion being formed art its opposite end with a hollow fitting piece for slidable mounting in the stanchions of the vertically adjacent wall element, hollow half-stanchions provided on the lateral opposite sides of each wall element and formed on their inner and outer sides with anges telescopingly slidably engaging and overlapping with the iianges of the hollow halfstanchions of the two laterally adjacent wall elements so that upon expansion and contraction of the wall elements the cooperating half-stanchions are able to slide freely in relation to each other,
  • each story including a horizontal floor and ceiling element, a continuous metal-framed glass wall forming the external wall of said building and comprising a plurality of prefabrcated external wall elements, each wall element including a plurality of hollow stanchions, cro-ssbars secured to said stanchions for interconnecting same, each stanchion being xedly connected at one end only to the horizontal floor and ceiling element of a story in front of said element, each stanchion being formed at its opposite end with a hollow titting piece for slidable mounting in the stanchions of the vertically adjacent wall element, hollow half-stanchions provided on the lateral opposite sides -of each wall element and formed on their inner and outer sides with anges telescopingly slidably engaging and overlapping with the flanges of the hollow halfstanchions of the two laterally adjacent wall elements so that' upon expansion and contraction of the wall elements the cooperating half-stanchions are able to slide freely in
  • each story including a horizontal floor and ceiling element, a continuous metal-framed glass wall forming the external wall of said building and comprising a plurality of prefabricated external wall elements, each Wall element including a plurality of hollow stanchions, crossbars secured to said stanchions for interconnecting same, each stanchion being xedly connected at one end only to the horizontal floor and ceiling element of a story in front of said element, each stanchion being formed at its opposite end with a hollow fitting piece for slidable mounting in the stanchions of the vertically adjacent wall element, hollow half-stanchions provided on the lateral opposite sides of each wall element and formed on their inner and outer sides with flanges telescopingly slidably engaging and ⁇ overlapping with the llanges of the hol-low halfstanchions of the two laterally adjacent wall elements so that upon expansion and contraction of the wall elements the cooperating half-stanchions are able to slide freely in relation lto each other, one of said
  • each story including a horizontal floor and ceiling element, a continuous metal-framed glass wall forming the external wall of said building and comprising a plurality of prefabricated external wall elements, each wall element including a plurality of hollow stanchions, crossbars secured to said stanchions for interconnecting saine, each stanchion being 'lixedly connected at one end only to the horizontal oor and ceiling element of a story in front of said element, each stanchion being formed at its opposite end with a hollow litting piece for slidable mounting in the stanchions of the vertically adjacent wall element, hollow half-stanchions provided on the lateral opposite sides of each wall element and formed on their inner and outer sides with flanges telescopingly slidably engaging and ⁇ overlapping with the anges of the hollow halfstanchions of the two laterally adjacent wall elements so that uponexpansion and contraction of the wall elements the cooperating hal-stanchions are able to slide freely in relation to each other,
  • each story including a horizontal iioor and ceiling element, a continuous metal-framed glass wall forming the external wall of said building and comprising a plurality of prefabricated external wall elements, each wall element including a plurality of hollow stanchions, crossbars secured to said stanchions for interconnecting same, each stanchion being lixedly connected at one end only to the horizontal lioor and ceiling element of a story in front of said element, each stanchion being formed at its opposite end with a hollow iitting piece for slidable mounting in the stanchions of the vertically adjacent wall element, hollow half-stanchions provided on the lateral opposite sides of each wall element and formed on their inner and outer sides with langes telescopingly slidably engaging and overlapping with the flanges of the hollow half-stanchions of the two laterally adjacent wall elements so that upon expansion and contraction of the wall elements the cooperating half-stanchions are able to slide freely in relation to each other
  • each story including a horizontal floor and ceiling element, a
  • each wall element including a plurality of hollow stanchions, crossbars secured to said stanchions for interconnecting same, each stanchion being xedly connected at one end only to the horizontal oor and ceiling element of a story in front of said element, each stanchion being formed at its opposite end with a hollow fitting piece for slidable mounting in the stanchions of the vertically adjacent wall element7 hollow half-stanchions.
  • each wall element provided on the lateral opposite sides of each wall element and formed on their inner and outer sides with llanges telescopingly slidably engaging and overlapping with the flanges of the hollow half-stanchions of the two laterally adjacent wall elements so that upon expansion and contraction of the wall elements the cooperating half-stanchions are able to slide freely in relation to each other, and a supporting strut at the lower end of each stanchion, which strut is adapted to be secured to
  • a wall element for forming an external wall of a building of the multi-storied type comprising a plurality of spaced hollow stanchions, crossbars secured to and interconnecting said stanchions, each stanchion being provided at one end with a hollow tting piece facilitating slidable mounting thereof in stanchions of a vertically adjacent wall element, each stanchion being adapted to be supported at another end opposite to said one end by a horizontal iloor and ceiling element of a building story in front of the saine, and hollow half-stanchions provided on lateral opposite sides of said wall element, said halfstanchions being provided at inner and outer sides thereof with lianges adapted to overlap anges provided on hollow halfstanchions of laterally adjacent wall elements.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Load-Bearing And Curtain Walls (AREA)
  • Finishing Walls (AREA)
  • Grates (AREA)
  • Rod-Shaped Construction Members (AREA)
US523845A 1954-07-24 1955-07-22 Metal window wall Expired - Lifetime US2916108A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEG14972A DE957257C (de) 1954-07-24 1954-07-24 Als Gebaeudefassade dienende Metallfensterwand

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US2916108A true US2916108A (en) 1959-12-08

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US523845A Expired - Lifetime US2916108A (en) 1954-07-24 1955-07-22 Metal window wall

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US (1) US2916108A (de)
BE (1) BE540023A (de)
CH (2) CH331427A (de)
DE (1) DE957257C (de)
FR (1) FR1135281A (de)
GB (1) GB810302A (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3037591A (en) * 1956-10-02 1962-06-05 Kawneer Co Wall construction
US3152672A (en) * 1959-10-16 1964-10-13 Westinghouse Electric Corp Post for walls
US3160243A (en) * 1960-01-04 1964-12-08 Fenestra Inc Building structure
US3176806A (en) * 1960-05-06 1965-04-06 Robertson Co H H Curtain wall
US3206901A (en) * 1959-01-16 1965-09-21 Knag As A Wall structures
US3266210A (en) * 1961-12-19 1966-08-16 Aluminum Extrusion Company Mullion and rail composite curtain wall construction
US3357145A (en) * 1964-01-09 1967-12-12 Grossman Abraham Curtain wall construction allowing vertical and horizontal expansion
US3522684A (en) * 1967-10-18 1970-08-04 Abraham Grossman Water barrier coupling means for vertical mullions
US3758997A (en) * 1970-11-23 1973-09-18 Engineered Products Inc Building wall assembly
US3802127A (en) * 1972-06-19 1974-04-09 J Silvernail Window frame
US3844077A (en) * 1972-05-11 1974-10-29 L Vance Building wall assembly with weepage channels
US20150059269A1 (en) * 2013-08-28 2015-03-05 Advanced Building Systems, Inc. Airloop Window Wall for Modular Construction Technology

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1108886B (de) * 1957-12-04 1961-06-15 L A Riedinger Bronzewarenfabri Metallfensterwand
US2949981A (en) * 1957-12-17 1960-08-23 Robertson Co H H Wall structure
US3025934A (en) * 1958-01-30 1962-03-20 Joseph W Spiselman Sectional flooring
DE1245085B (de) * 1959-11-07 1967-07-20 Alco Bauzubehoer Gebaeudefassade
DE1255271B (de) * 1961-03-27 1967-11-30 Gartner & Co J Vorrichtung zum Befestigen der Pfosten von Vorhangwaenden an Geschossdecken
DE1236760B (de) * 1962-05-03 1967-03-16 John Roeschinger Vorgehaengte Fassadenwand
DE1284605B (de) * 1963-09-13 1968-12-05 Gartner & Co J Vorhangwand fuer Gebaeude
DE3540385A1 (de) * 1985-11-14 1987-05-21 Eltreva Ag Fassadenkonstruktion aus metallprofilen
DE19714065A1 (de) * 1997-04-05 1998-10-15 Pyratekt Glasdachkonstruktion Glasdach

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2230348A (en) * 1938-06-17 1941-02-04 Pittsburgh Plate Glass Co Wall construction
CH281053A (de) * 1950-04-24 1952-02-29 Koller Ernst Zerlegbare Wand mit senkrechten Metallsäulen.
US2663917A (en) * 1948-01-28 1953-12-29 Peterson Dev Corp Window structure

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH282961A (de) * 1950-06-30 1952-05-31 Aluminium Ind Ag Verfahren zur Herstellung eines raumabschliessenden Bauteils und nach diesem Verfahren hergestellter Bauteil.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2230348A (en) * 1938-06-17 1941-02-04 Pittsburgh Plate Glass Co Wall construction
US2663917A (en) * 1948-01-28 1953-12-29 Peterson Dev Corp Window structure
CH281053A (de) * 1950-04-24 1952-02-29 Koller Ernst Zerlegbare Wand mit senkrechten Metallsäulen.

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3037591A (en) * 1956-10-02 1962-06-05 Kawneer Co Wall construction
US3206901A (en) * 1959-01-16 1965-09-21 Knag As A Wall structures
US3152672A (en) * 1959-10-16 1964-10-13 Westinghouse Electric Corp Post for walls
US3160243A (en) * 1960-01-04 1964-12-08 Fenestra Inc Building structure
US3176806A (en) * 1960-05-06 1965-04-06 Robertson Co H H Curtain wall
US3266210A (en) * 1961-12-19 1966-08-16 Aluminum Extrusion Company Mullion and rail composite curtain wall construction
US3357145A (en) * 1964-01-09 1967-12-12 Grossman Abraham Curtain wall construction allowing vertical and horizontal expansion
US3522684A (en) * 1967-10-18 1970-08-04 Abraham Grossman Water barrier coupling means for vertical mullions
US3758997A (en) * 1970-11-23 1973-09-18 Engineered Products Inc Building wall assembly
US3844077A (en) * 1972-05-11 1974-10-29 L Vance Building wall assembly with weepage channels
US3802127A (en) * 1972-06-19 1974-04-09 J Silvernail Window frame
US20150059269A1 (en) * 2013-08-28 2015-03-05 Advanced Building Systems, Inc. Airloop Window Wall for Modular Construction Technology
US9175471B2 (en) * 2013-08-28 2015-11-03 Advanced Building Systems, Inc. Airloop window wall for modular construction technology

Also Published As

Publication number Publication date
GB810302A (en) 1959-03-11
CH365513A (de) 1962-11-15
CH331427A (de) 1958-07-31
FR1135281A (fr) 1957-04-26
BE540023A (de)
DE957257C (de) 1957-01-31

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