US3823653A - Fluid distributing device - Google Patents

Fluid distributing device Download PDF

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Publication number
US3823653A
US3823653A US00293158A US29315872A US3823653A US 3823653 A US3823653 A US 3823653A US 00293158 A US00293158 A US 00293158A US 29315872 A US29315872 A US 29315872A US 3823653 A US3823653 A US 3823653A
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United States
Prior art keywords
chamber
fluid
regulating means
outlet opening
gap
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Expired - Lifetime
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US00293158A
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English (en)
Inventor
Y Roos
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AR VENTILATION AB
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AR VENTILATION AB
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser

Definitions

  • ABSTRACT This invention pertains to a device for distributing a fluid, such as air, to a surrounding space in a selected air distribution pattern.
  • the device is of the type with which the medium to be distributed is imparted a circulatory motion upon entering thedevice, wherewith a sub-pressure zone is created in the centre of the device as the result of air being drawn from the region of said zone by the circulating air mass.
  • An axially and radially adjustable regulating means is arranged in the vicinity of the medium outlet of the device to define a gap through which the medium must pass when leaving the device, the regulating means being 50 constructed that adjustment thereof causes a change in the resistance of fluid flow through the gap and in the distribution pattern of the medium issuing therethrough.
  • FIG.1 A first figure.
  • the present invention relates to a fluid distributing device of the type with which the fluid to be distributed moves in a circulatory path within the device and is air is distributed or the direction in which it leaves the nozzle owing to the lack of means which enable the pressure distribution within the device to be controlled, and therewith also permit control of emergent air.
  • the device To impart a circulatorymotion to the air entering the device, it is provided with a tangentially arranged air intake, which results in an uneven distribution of pressure within the device. In the absence of regulating or control means, this results in a one-sided and unidirectional air flow at the concentrically positioned outlet tensive mixture with the surrounding air is obtained which causes the speed of the incoming air to be rapidly lowered and provides a draughtfree device. The kinetic energy of the air flowing into the device is also reduced to advantage by the rotating body of air within the device.
  • the main concept of the invention resides in the arrangement in such devices of control means having the form of a disc or rotation symmetrical body which when centered leaves a relatively narrow gap between its outer peripheral surface and the wall of the device.
  • the resistance to flow offered by the gap stabilizes the flow of air through the device and along the edge of the outlet opening.
  • the regulating disc can also be perforated and made axially displaceable,wherewith when moved to an axially bottom limit position, in which the disc seats against an outlet flange, a downwardly directed flow of air is obtained.
  • One object of the present invention is to provide a device of the aforementioned type with which the medium, in this case air, is distributed in a horizontal layer and with which the pattern of air distribution can be varied from a 360 emergent pattern around the device to a sector emergent pattern of any angle, in a direction which can be continuously and smoothly changed throughout one revolution.
  • the medium in this case air
  • Another object is to provide a device with which the fluid discharged therefrom can be quickly and readily switched from a horizontal path to a vertical path and with which the vertical fluid distributing angle and distribution pattern can be varied.
  • an air gap is formed between an outlet flange and the undersurface of an internally arranged tiltable regulating plate or disc located at a distance from the outlet flange.
  • the air gap has uniform width around the whole circumference of the device, a circular distribution pattern of the air is obtained around the device, and as a result of the centrifugal effect of the air rotating in the device, said air is ejected horizontally from an outlet opening. Tilting of the plateor disc enables the air resistance to be varied at different points around the gap, air being distributed in the direction where the greatest resistance prevails in the air gap. A more concentrated directioning effect is obtained when the edge of the disc is in contact with the outlet flange.
  • the diffusor provides for axial air supply to a curved plate ordisc located in the path of a downwardly directed air flow, with the convex side of the disc facing upwardly in a downwardly discharging, fully open diffusor funnel hich provides an obliquely downward spread of air with which the downward direction increases with tilting of the disc for intended lateral distribution of the air, and with which the air flow is throttled when the disc is moved to bear against the axial air intake.
  • the regulating disc is located externally and is provided with a raised edge which, when the disc isdisplaced radially and axially, co-acts with the outside of the edge on the air ejection opening of the device to vary the distribution pattern; a variation on this theme being a construction with which the disc has a raised edge which co-acts with the'inside of the device at the outlet thereof.
  • a specially constructed regulating device whose function is based on an interface effect is also envisaged, and also a device with which the regulating disc is radially displaceable on two diametrically opposed pins extending from a ring rotatable in the device.
  • FIGS. l-ll illustrate in plane and in section devices provided with an internal regulating disc, and show how the air distribution pattern is changed in response to the position of the regulating disc.
  • FIG. 12 is a section of a device which can be switched from a horizontal air distribution pattern to different degrees of vertical distribution.
  • FIGS. 13-18 illustrate a device having an externally located radially and axially displaceable regulating disc.
  • FIGS. 19 and 20 illustrate in section and in plane a device having a regulating means operating with an interface effect
  • FIGS. 21-24 illustrate air distribution patterns obtained with this device.
  • the device also has an outlet flange 35 which may be planar or profiled, for example conical, with an FIGS. 25 and 26 illustrate an arrangement for radi- I ally and axially adjusting the regulating means.
  • the distributing device includes a circular chamber 31 (FIG. 4) having a preferably cylindrical wall 32, and is outlet 36, the diameter of which outlet is preferably smaller than the inner diameter of the wall 32 on the outlet side.
  • the device is provided internally with a regulating disc 38 (FIG. 6) having a diameter which is preferably larger than the diameter of the outlet 36.
  • the regulating disc 38 may be provided with air passage orifices 39 or may be imperforate, with the exception of a hole 40 through which a shaft 42 is able to move in a manner to enable the disc 38 to be displaced radially into contact with the inner surface of the wall 32 at any point around the periphery thereof.
  • the disc 38 is inserted between two plates 43, 44 arranged on the shaft 42 and intended to lock the disc in its set position.
  • the shaft .42 can be adjusted vertically by means of screws (not shown) or by being moved up and down in a holder 45. I
  • the air is passed tangentially into the device and is thus caused to flow in a rotary path towards the inside of the wall 32.
  • This causes air to move from the centre zone of the device, where a sub-pressure zone is created as a result thereof.
  • Air from the ventilated room flows to the sub-pressure zone through the openings 39 in the disc and is mixed with the rotating primary air, whereafter the air is thrown tangentially across the edge 37 of the outlet opening 36 by the centrifugal force of the rotating air mass. Further admixture of ambient air with the primary air is effected by withdrawal of air externally of the device.
  • This mode of operation provides a very efficient device with both heating and cooling operations, and also renders the device draft-free, since the velocity of the injected air is rapidly reduced.
  • FIG. 8 illustrates a device having a profiled outlet flange and a regulating disc 47 having a conically raised edge 47a with which the air is blown obliquely downwardly when the disc is displaced radially in its lowermost position.
  • the air distribution pattern can be varied and directed around the full circumference of the device.
  • FIGS. and 11 illustrate a device having a curved regulating disc 54 which is retained to a rod 55 by means of a screw 56 passing through a hole 54a disposed in the disc 54 and permitting centering and radial displacement of the disc.
  • the device illustrated in FIG. 12 has a cylindrical or slightly conical wall 61, an outlet flange 63 having an outlet opening 65, the diameter of which is smaller than the inner diameter of the device.
  • An internally threaded pipe 66 is secured to the roof 62 of the device.
  • a flange 67 has arranged thereon a threaded stud 68 capable of being screwed into the pipe 66 to enable vertical movement of a regulating disc 69, said disc being mounted between the flange 67 and a-circular plate 72, which by means of a threaded stud 73 can be caused to lock the radially movable disc 69 in'its adjusted position.
  • the disc'69 has disposed therein a hole 70 having a diameter which permits free passage when the disc is moved radially so thatits edge 71 is able to contact the wall of the device.
  • the device provides horizontal distribution of the air'with a change in the direction of distribution, and vertical air distribution where the vertical distribution angle is changed by moving the plate 72'to different vertical positions when said plate is inserted in the outlet opening 65.
  • FIGS. 13-18 illustrate an embodiment with which a perforated regulating disc 101 located externally of the device has an upwardly raised edge 102 and is axially and radially manoueverable according to the previously described principle, the edge 102 co-acting with an edge 103 defining the outlet opening of the device to permit variation ofthe air distribution pattern.
  • the regulating disc 101 is centrally aligned to-form an .air gap 104 between the edge 103 and the disc 101,
  • FIGS. 13 and 14 there is created a circular air distribution pattern having a horizontal extension, as illustrated in FIGS. 13 and 14. Lateral distribution of the air is obtained by radially moving the disc 101, the air being blown out in the direction in which the disc is moved. A more concentrated directioning effect is obtained when the edge 102 is incontact with the edge 103, a maximum air ejection opening being obtained in the direction in which the air leaves the device, as illustrated in FIG. 17.
  • the disc 101 is moved upwards into abutment with the edge 103, as shown in FIG. 15.
  • FIG. 18' illustrates a device provided with a roof flange 105 having a downwardly folded edge 106 to direct the horizontally ejected air downwardly, when so required.
  • FIG. 19 illustrates a ing means providing greater advantages and possibilities of variation.
  • a profiled ring 111 is given an.
  • the ring 111 has a diametrically located base 116, for example in the form of a relatively narrow plateon which supporting means for supporting and radially displacing the regulating means can be mounted.
  • the supportingmeans comprises a shaft 118 which is vertically displaceable in or capable of being screwed into a holder 117, and which has two plates 119, 120 between which the base 116 can be radially displaced owing to the arrangement of a hole 121 which permits free movement around the shaft 118, thereby enabling the ring 111 to be moved into contact with the inside of the device in any direction around the in an intermediate position.
  • FIGS. 21-24 illustrate diagrammatically examples of -air distribution patterns obtained with the device of FIG. 19 and show how said patterns canbe varied according to requirements by simply adjusting one single regulating means.
  • FIGS. 22-24do not identify the elements responsible for creating the distribution pattern, reference being made in this respect to FIGS. 19 and 20.
  • the vertical distribution angle V shown in FIG. 22 can be smoothly and continuously varied by raising and lowering the ring 111 and the mode of operation depends on the particular construction of the ring and the manner in which it co-acts with the flange 113, which enables the interface effect, which causes air blown along a surface to be sucked in towards the same, and
  • FIGS. 25 and 26 illustrate a device with which airis supplied tangentially and which has an alternative em-- bodiment of the arrangement for radially and axially adjusting the regulating means.
  • This alternative comprises a rotatable ring 131 having two diametrically opposed bars132, 133 extending in recesses disposed in an internal regulating ring 134 which is provided at the bottom thereof with a plate 135 which, in its lowered position, provides a vertical gap 136 between its upper surface and the edge 137 defining the outlet opening of distribution pattern can be obtained in any direction around the whole circumference of the device.
  • a fluiddistribution device comprising a circular chamber within which the fluid follows a rotary path, said chamber'having tangential fluid inlet means and an outlet opening, regulating means for constantly maintaining a resistance to the flow of fluid at the peripheral flow zone of said chamber, thereby to counteract uneven pressure distribution, said regulating means being so mounted adjacent said outlet opening of said chamber that a relatively narrow gap is formed between an edge of the regulating means and a circular wall of said chamber, the fluid spiraling through said gap before being ejected tangentially over an edge of said outlet opening in a horizontally extending distribution pattern through the action of centrifugal force, said regulating means being mounted within said chamber in a region upstream of said outlet opening, said gap being defined between the edge of the regulating means and said circular wall, said regulating means having the form of a disc arranged for radial movement into contact with said circular wall around the full circumference thereof or locked in an intermediate position, the disc when occupyin g a centered position providing a gap of uniform width around the full
  • a fluid distribution device comprising a circular chamber within which the fluid follows a rotary path, said chamber having tangential fluid inlet means and an outlet opening, regulating means for constantly maintaining a resistance to the flow of fluid at the peripheral flow zone of said chamber, thereby to counteract uneven pressure distribution, said regulating means being so mounted adjacent said outlet opening of said chamber that a relatively narrow gap is formed between an edge of the regulating means and a circular wall of said chamber, the fluid spiraling through said gap before being ejected tangentially over an edge of said outlet opening in a horizontally extending distribution pattern through the action of centrifugal force, said regulating means being mounted within said chamber in a region upstream of said outlet opening, said gap being defined between the edge of the regulating means and said circular wall, and a flange defining said outlet opening,
  • a fluid distribution device comprising a circular chamber within which the fluid follows a rotary path, said chamber having tangential fluid inlet means and an outlet opening, regulating means for constantly maintaining a resistance to the flow of fluid at the peripheral flow zone of said chamber, thereby to counteract uneven pressure distribution, said regulating means being so mounted adjacent said outlet opening of said chamber that a relatively narrow gap is formed between an edge of the regulating means and a circular wall of said chamber, the fluid spiraling through said gap before being ejected tangentially overan edge of said outlet opening in a horizontally extending distribution pattern through the action of centrifugal force, said regulating means being mounted within said chamber in a region upstream of said outlet opening, said gap being defined between the edge of the regulating means and said circularwall, and a flange defining said outlet opening, the diameter of which is smaller than the internal diameter of said circular wall, so as to form a vertical gap between the flange and a disc mounted within saidchamber and constituting the regulating means, the regulating means being a disc having opening
  • a fluid distribution device comprising a circular chamber within which the fluid follows a rotary path, said chamber having tangential fluid inlet means and an outlet opening, regulating means for constantly maintaining a resistance to the flow of fluid at the peripheral flow zone of said chamber, thereby to counteract uneven pressure distribution, said regulating means being so mounted adjacent said outlet opening of said chamber that a relatively narrow gap is formed between an edge of the regulating means and a circular wall of said chamber, the fluid spiraling through said gap before being ejected tangentially over an edge of said outlet opening in a horizontally extending distribution pattern through the action of centrifugal force, said regulating means being mounted within said chamber in a region upstream of said outlet opening, said gap being defined between the edge of the regulating means and said circularwall, and a flange defining said outlet opening, the diameter of which is smaller than the internal diameter of said circular wall, so as to form a vertical gap be-' tween the flange and a disc mounted within said chamber and constituting the regulating means, said regulating means
  • a fluid distribution device comprising a circular chamber within which the fluid follows a rotary path, said chamber having tangential fluid inlet means and an outlet opening, regulating means for constantly maintaining a resistance to the flow of fluid at the peripheral flow zone of said chamber, thereby to counteract uneven pressure distribution, said regulating means being so mounted adjacent said outlet opening of said chamcular wall, the regulating means comprising a radially adjustable disc and a cylindrical plate abutting said disc and capable of being inserted-in said outlet opening to permit combined radial and axial adjustment of the regulating means, which means is arranged to provide downward distribution of fluid when the plate is lowered in the outletopening and horizontal distribution of fluid when the plate is located above an outlet flange forming part of said chamber.
  • a fluid distribution device comprising a circular chamber within which the fluidffollows a rotary path, said chamber having tangential fluid inlet means and an outlet opening, regulating means for constantly maintaining a resistance to the flow of fluid at the peripheral flow zone of said chamber, thereby to counteract uneven pressure distribution, said regulating means being so mounted adjacent said outlet opening of said chamber that a relatively narrow gap is formed between an edge of the regulating means and a circular wall of said chamber, the fluid spiraling through said gap before being ejected tangentially over an edge of said outlet opening in a horizontally extending distribution pattern through the action of centrifugal force, said regulating means being mounted within said chamber in a region upstream of said outlet opening, said gap being defined between the edge of the regulating means and said circular wall, the regulating means being a profiled ring provided with a diametrically located base having the form of a relatively narrow plate or spline on which means for supporting and radially displacing the regulating means is mounted, said supporting means comprising a holder and
  • a fluid distribution device comprising a circular chamber within which the fluid follows a rotary path, said chamber having tangential fluid inlet means and an outlet opening, regulating means for constantly maintaining a resistance to the flow of fluid at the peripheral flow zone of said chamber, thereby to counteract uneven pressure distribution, said regulating means being so mounted adjacent said outlet opening of said chamment of said disc, displacement of the disc to one side providing a horizontal distribution of fluid in this direction and central alignment of said disc providing a circular horizontal distribution of fluid whereby when the disc is perforated, a downwardly directed fluid distribution is obtained as the disc is moved into abutment with the edge of the outlet opening.
  • a device having an outer roof flange having a downwardly turned edge for causing the horizontally directed fluid from the device to be turned downwardly.
  • a fluid distribution device comprising a circular chamber Within which the fluid follows a rotary'path, said chamber having tangential fluid inlet means and an outlet opening, regulating means for constantly maintaining a resistance to the flow of fluid at the peripheral flow zone of said chamber, thereby to counteract uneven pressure distribution, said regulating means being so mounted adjacent said outlet opening of said chamber that a relatively narrow gap is formed between an edge ofthe regulating means and a circular wall of said chamber, the fluid spiraling through said gap before being ejected tangentially over an edge of said outlet opening in a horizontally extending distribution pattern through the action of centrifugal .force, and an internal, rotatable ring having two diametrically opposed bars extending in recesses disposed in an internal regulating ring for radial displacement thereof towards the rotatable ring, the regulating ring having a plate having perforations to provide downward flow of fluid when the plate is moved into abutment with a surrounding said outlet opening.
  • a fluid distribution device comprising a circular chamber within which the fluid follows a rotary path, said chamber having tangential fluid inlet means and an outlet opening, regulating means for constantly maintaining a resistance to the flow of fluid at the peripheral flow zone of said chamber, thereby to counteract uneven pressure distribution, said regulating means being so mounted adjacent said outlet opening of said chamber that a relatively narrow gap is formed between an edge of the regulating means and a circular wallof said chamber, the fluid spiraling through said gap before being ejected tangentially over an edge of said outlet opening-in a horizontally extending distribution pattern through the action of centrifugal force, said regulating means comprising a circular member whose outer diameter is substantially less than the inner diameter of said circular wall of said chamber, and means adjustably mounting said circular member for movement in any direction perpendicular to its axis to adjusted positions of variable eccentricity relative to said circular wardly extending flange on said circular wall defining wall.
  • said circular member comprising a disc greater diameter than said flange.
  • a device according to claim 10, and a radially insaid outlet opening, said circular member having a

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Duct Arrangements (AREA)
  • Air-Flow Control Members (AREA)
  • Centrifugal Separators (AREA)
US00293158A 1971-10-04 1972-09-28 Fluid distributing device Expired - Lifetime US3823653A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE12489/71A SE356577B (ja) 1971-10-04 1971-10-04

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US3823653A true US3823653A (en) 1974-07-16

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US00293158A Expired - Lifetime US3823653A (en) 1971-10-04 1972-09-28 Fluid distributing device

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US (1) US3823653A (ja)
JP (1) JPS4845061A (ja)
BE (1) BE789615A (ja)
CA (1) CA968213A (ja)
DE (1) DE2248492A1 (ja)
ES (1) ES184339Y (ja)
FI (1) FI55722C (ja)
FR (1) FR2155997B3 (ja)
GB (1) GB1411395A (ja)
IT (1) IT966120B (ja)
NL (1) NL7213442A (ja)
NO (1) NO133679C (ja)
SE (1) SE356577B (ja)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070178826A1 (en) * 2004-03-18 2007-08-02 Kei Takeshita Blow out grill and air conditioning ventilating system using the grill
US20110319009A1 (en) * 2008-12-23 2011-12-29 Lg Electronics Inc. Ceiling mounted air conditioner
WO2020089581A1 (en) * 2018-11-01 2020-05-07 Dyson Technology Limited Adjustable fan nozzle
GB2602797A (en) * 2021-01-12 2022-07-20 Intelligent Cooling Ltd Improved plenum for air delivery
US11454247B2 (en) 2018-06-27 2022-09-27 Dyson Technology Limited Nozzle for a fan assembly
US11486413B2 (en) 2018-06-27 2022-11-01 Dyson Technology Limited Nozzle for a fan assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3037386B1 (fr) * 2015-06-10 2017-07-14 Aldes Aeraulique Systeme de diffusion d'air avec fixation par aimantation permettant plusieurs inclinaisons du diffuseur

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2271010A (en) * 1938-10-04 1942-01-27 Anemostat Corp Ventilating apparatus
US3026787A (en) * 1956-07-12 1962-03-27 Neu Sa Induction air distributors
US3292522A (en) * 1965-01-25 1966-12-20 Shur Sol Diffuser
US3411425A (en) * 1967-01-09 1968-11-19 Air Factors Air diffusion outlet with laterally adjustable weir control

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2271010A (en) * 1938-10-04 1942-01-27 Anemostat Corp Ventilating apparatus
US3026787A (en) * 1956-07-12 1962-03-27 Neu Sa Induction air distributors
US3292522A (en) * 1965-01-25 1966-12-20 Shur Sol Diffuser
US3411425A (en) * 1967-01-09 1968-11-19 Air Factors Air diffusion outlet with laterally adjustable weir control

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070178826A1 (en) * 2004-03-18 2007-08-02 Kei Takeshita Blow out grill and air conditioning ventilating system using the grill
US7635297B2 (en) * 2004-03-18 2009-12-22 Panasonic Corporation Blow out grill and air conditioning ventilating system using the grill
US20110319009A1 (en) * 2008-12-23 2011-12-29 Lg Electronics Inc. Ceiling mounted air conditioner
US9255717B2 (en) * 2008-12-23 2016-02-09 Lg Electronics Inc. Ceiling mounted air conditioner
US11454247B2 (en) 2018-06-27 2022-09-27 Dyson Technology Limited Nozzle for a fan assembly
US11486413B2 (en) 2018-06-27 2022-11-01 Dyson Technology Limited Nozzle for a fan assembly
US11680581B2 (en) 2018-06-27 2023-06-20 Dyson Technology Limited Nozzle for a fan assembly
WO2020089581A1 (en) * 2018-11-01 2020-05-07 Dyson Technology Limited Adjustable fan nozzle
JP2022506392A (ja) * 2018-11-01 2022-01-17 ダイソン・テクノロジー・リミテッド 調整可能なファンノズル
US11767853B2 (en) 2018-11-01 2023-09-26 Dyson Technology Limited Nozzle for a fan assembly
US12049902B2 (en) 2018-11-01 2024-07-30 Dyson Technology Limited Nozzle for a fan assembly
GB2602797A (en) * 2021-01-12 2022-07-20 Intelligent Cooling Ltd Improved plenum for air delivery

Also Published As

Publication number Publication date
FR2155997A1 (ja) 1973-05-25
FI55722C (fi) 1979-09-10
DE2248492A1 (de) 1973-04-12
NL7213442A (ja) 1973-04-06
BE789615A (fr) 1973-02-01
IT966120B (it) 1974-02-11
ES184339Y (es) 1974-06-01
FI55722B (fi) 1979-05-31
CA968213A (en) 1975-05-27
ES184339U (es) 1973-09-01
NO133679B (ja) 1976-03-01
GB1411395A (en) 1975-10-22
NO133679C (ja) 1976-06-09
FR2155997B3 (ja) 1975-10-31
JPS4845061A (ja) 1973-06-28
SE356577B (ja) 1973-05-28

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