NO121419B - - Google Patents
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- Publication number
- NO121419B NO121419B NO169065A NO16906567A NO121419B NO 121419 B NO121419 B NO 121419B NO 169065 A NO169065 A NO 169065A NO 16906567 A NO16906567 A NO 16906567A NO 121419 B NO121419 B NO 121419B
- Authority
- NO
- Norway
- Prior art keywords
- duct
- fresh air
- damper
- exhaust air
- air duct
- Prior art date
Links
- 238000009423 ventilation Methods 0.000 claims description 5
- 241000102542 Kara Species 0.000 claims 1
- 238000005192 partition Methods 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
Classifications
-
- 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
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K1/00—Housing animals; Equipment therefor
- A01K1/0047—Air-conditioning, e.g. ventilation, of animal housings
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K1/00—Housing animals; Equipment therefor
- A01K1/0047—Air-conditioning, e.g. ventilation, of animal housings
- A01K1/0064—Construction of air inlets or outlets in walls
-
- 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
- F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
- F24F7/065—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit fan combined with single duct; mounting arrangements of a fan in a duct
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Environmental Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Biodiversity & Conservation Biology (AREA)
- Animal Husbandry (AREA)
- Zoology (AREA)
- Air-Flow Control Members (AREA)
- Ventilation (AREA)
- Duct Arrangements (AREA)
- Housing For Livestock And Birds (AREA)
Description
Luftinnretning for husrom. Air conditioning for domestic rooms.
Foreliggende oppfinnelse vedrorer en lufteinnretning for husrom, særlig stallrom, ved hvilken avluften fra rommet fores ut over en avluft-sugekanal som forlbper vertikalt nedenfor og opp til en i det vesentlige horisontal utad forende avluftkanal som inneholder en aksialvifte og som er anordnet under en likeledes utad forende friskluftkanal, gjennom hvilken friskluften suges inn som folge av det undertrykk som aksialviften tilveiebringer i rommet, hvor friskluftkanalen og avluftkanalen er innbyrdes forbundet over en forbindelseskanal, og hvor friskluftkanalen, avluftkanalen og forbindelseskanalen kan styres således over mellomstillinger ved hjelp av et som to-armet vektstang utformet dobbéltspjell at ved stengning av forbindelseskanalen ved hjelp av den ene spjellhalvdel åpnes både friskluftkanalen og den horisontale avluftkanal, mens denne spjellhalvdel i dobbeltspjellets annen endestilling ved åpning av forbindelseskanalen stenger den vertikale avluftkanal og den annen spjellhalvdel stenger friskluftkanalen. The present invention relates to a ventilation device for a house, in particular a stable room, in which the exhaust air from the room is fed out over an exhaust air suction duct which continues vertically below and up to a substantially horizontal outward leading exhaust air duct which contains an axial fan and which is arranged under a likewise outward connecting fresh air duct, through which the fresh air is sucked in as a result of the negative pressure that the axial fan provides in the room, where the fresh air duct and the exhaust air duct are interconnected via a connecting duct, and where the fresh air duct, the exhaust air duct and the connecting duct can thus be controlled over intermediate positions by means of a two-armed lever-shaped double damper that when closing the connecting duct with the help of one damper half, both the fresh air duct and the horizontal exhaust air duct are opened, while this damper half in the double damper's other end position when opening the connecting duct closes the vertical exhaust air duct and the other damper half closes the fresh air duct.
Som regel er lufteinnretninger av nevnte art utstyrt med turtall-innstillbare ventilatorer, idet turtallet særlig innstilles i avhengighet av temperaturen i rommet. 1 dette tilfelle kan der oppstå en ytterligere ulempe som påvirker luftstrømmen i ugunstig retning. Ved lav transportydelse og dermed lavt turtall avtar luf-tens innstromningshastighet således at den innsugde luft meget hur-tig nærmer seg rommets gulv langs en kort kurvebane. Som folge av de samme forhold, altså ved forholdsvis lav transportydelse av ven-tilatoren, vil dessuten utstrbmningsdysen ikke bli gjennomstrømmet i hele sin bredde som folge av den lave gjennomstromningsmengde, As a rule, ventilation devices of the aforementioned type are equipped with speed-adjustable ventilators, the speed being particularly set depending on the temperature in the room. In this case, a further disadvantage may arise which affects the air flow in an unfavorable direction. At a low transport performance and thus a low speed, the air's inflow speed decreases so that the sucked-in air very quickly approaches the floor of the room along a short curved path. As a result of the same conditions, i.e. with a relatively low transport performance of the fan, the discharge nozzle will not be flowed through in its entire width as a result of the low flow rate,
men strbmme gjennom dysen i midten eller også ved lav andel av friskluft gjennom et hjbrne av dysen som folge av ventilatorens dreievirkning. Endelig må nevnes at det i mange tilfelle av samme årsak ikke alltid kan unngås at luftinnsugnings- og luftutblås-ningsåpningene ligger forholdsvis, tett inntil hinannen, således at svevepartikler i den utstrbmmende luft kan forurense den innsugde luft. but flow through the nozzle in the middle or, with a low proportion of fresh air, through a corner of the nozzle as a result of the fan's turning effect. Finally, it must be mentioned that in many cases, for the same reason, it cannot always be avoided that the air intake and air exhaust openings are located relatively close to each other, so that suspended particles in the outgoing air can contaminate the intake air.
Hensikten med oppfinnelsen er å forbedre strbmningsbildet og fordelingen av luften i rom som er utstyrt med lufteinnretning av den beskrevne art, og sbrge for at den innsugde friskluft prak-tisk talt ikke vil bli forurenset av den utsugde avLuft, hvilken oppgave loses ved at friskluftutlb*psåpningen som forer inn i rommet og er anordnet på et dyselegeme, er stengt av et spjell som holdes i stilling av en vekt eller fjær og hvis aksel, fortrinnsvis befinner seg ved spjellets underkant, og at friskluftinntaksåpningen og avluftåpningen er vendt bort fra hinannen således at friakluften og avluften sttfbmmer inn henholdsvis ut i forskjellige retninger. The purpose of the invention is to improve the flow pattern and the distribution of the air in rooms that are equipped with air conditioning of the type described, and to ensure that the fresh air taken in will practically not be contaminated by the air taken out, which task is solved by the fresh air outlet* the opening that leads into the room and is arranged on a nozzle body, is closed by a damper which is held in position by a weight or spring and whose shaft is preferably located at the lower edge of the damper, and that the fresh air intake opening and the exhaust air opening are turned away from each other so that the free air and exhaust air flow in and out respectively in different directions.
Dyselegemet er ifolge den videre oppfinnelse i sitt indre utstyrt med et antall luftledeblikk. Hensiktsmessig er1 utblåsningsåpningen ved enden av avluftkanalen utenfor rommet rettet bort fra dette og oppad, mens friskluft-inntaksåpningen utenfor rommet er rettet mot dette og nedad. According to the further invention, the nozzle body is internally equipped with a number of air ducts. Appropriately, the exhaust opening at the end of the exhaust air duct outside the room is directed away from this and upwards, while the fresh air intake opening outside the room is directed towards this and downwards.
Oppfinnelsen skal forklares under henvisning til tegning-ene, på hvilke fig. 1 viser et snitt ay et utf bcelsesekaernpel-.'ved-': åpent spjell, fig. 2 viser det samme ved lukket spjell, fig. 3 viser et snitt av dysens ut st rbmnlngs åpning véd lukket peiidéi spjell, fig. 4 viser i perspektiv og delvis snitt gjenstanden for oppfinnelsen ved åpent dobbeltspjell og lukket pendelspjell, fig. 5 viser, likeledes i perspektiv, dysens utstrbmningsåpning ved åpent pendelspjell, og fig. 6 viser de forskjellige deler av innretningen i perspektiv og trukket fra hinannen. The invention shall be explained with reference to the drawings, in which fig. 1 shows a cross-section and an outf bcellesekaernpel-.'ved-': open damper, fig. 2 shows the same with closed damper, fig. 3 shows a section of the nozzle out st rbmnlng opening with closed peiidei damper, fig. 4 shows in perspective and partial section the object of the invention with open double damper and closed pendulum damper, fig. 5 shows, likewise in perspective, the nozzle discharge opening when the pendulum damper is open, and fig. 6 shows the different parts of the device in perspective and drawn from each other.
På fig. 1 og 2 er vedkommende rom betegnet med 1 og rommets yttervegg med 2. Lufteinnretningen 3 består i hovedsaken av en i midten anordnet hovedkasse 5 som er innsatt i enAåpning 6 i veggen 2 og inneholder en aksialvifte 11 og et dobbeltspjell 20. In fig. 1 and 2, the relevant room is denoted by 1 and the room's outer wall by 2. The ventilation device 3 mainly consists of a centrally arranged main box 5 which is inserted into an opening 6 in the wall 2 and contains an axial fan 11 and a double damper 20.
På den side av kassen som vender inn mot rommet, er der på nedenfor beskrevet måte festet en sugekanal 4 og et dyselegeme 8, mens der på den motsatte side er festet en ytre kasse 28 som i det vesentlige danner lufteinntaksåpningen 14. Oe enkelte elementer består stort sett av blikk, men kan også være fremstilt av f.eks. glass-fiber forsterket plast. On the side of the box that faces the room, a suction channel 4 and a nozzle body 8 are attached in the manner described below, while on the opposite side an outer box 28 is attached which essentially forms the air intake opening 14. The individual elements consist of mostly made of tin, but can also be made of e.g. glass-fibre reinforced plastic.
Kassen 5 har mot rommet 1 en kort horisontal skillevegg 29, over hvilken dyselegemet 8 er festet. Dette tjener til innfor-ing av frisk- eller ventilasjonsluft i rommet 1 som munner ut i en åpning 9. Under skilleveggen 29 er sugekanalen festet til den midtre kasse 5. The box 5 has towards the room 1 a short horizontal partition 29, over which the nozzle body 8 is fixed. This serves to introduce fresh or ventilation air into the room 1 which opens into an opening 9. Under the partition 29, the suction duct is attached to the middle box 5.
Kassen 5 har på den side som vender mot rommet 1, to innbyrdes parallelle flenser 30 og 31, av hvilke den forste hviler mot innersiden av veggen 2, mens den annen tjener til befestigelse av dyselegemet 8 og sugekanalen 4. Sistnevnte danner en avluftsuge-kanal 7, hvis bvre ende munner ut i en horisontal avluftkanal 10 som er dannet av en midtre kasse 5 og i hvilken aksialviften 11 er innbygget med i det vesentlige horisontalt orientert rotasjonsakse. Fblgelig er aksialviften anordnet i veggens 2 område. On the side facing the room 1, the box 5 has two parallel flanges 30 and 31, the first of which rests against the inside of the wall 2, while the other serves to secure the nozzle body 8 and the suction duct 4. The latter forms an exhaust air suction duct 7, the right end of which opens into a horizontal exhaust duct 10 which is formed by a central box 5 and in which the axial fan 11 is built with an essentially horizontally oriented axis of rotation. Normally, the axial fan is arranged in the wall's 2 area.
Den ytre kasse 28 har en horisontal avluft-trykkanal 12 som utgjor en fortsettelse av den midtre kasses 5 horisontale kanal 10. Ved enden avfcrykkanalen 12 er der anordnet et avbbyningsblikk The outer box 28 has a horizontal exhaust air pressure channel 12 which constitutes a continuation of the horizontal channel 10 of the middle box 5. At the end of the exhaust channel 12 there is arranged a deflection
13 som leder avluften som trer ut gjennom åpningen 14, oppad.13 which guides the exhaust air that exits through the opening 14, upwards.
Over kassen 28 er der dessuten ved et på oversiden an-bragt blikk 32 tilveiebragt en horisontal friskluftkanal 15 som kommuniserer med den ytre luft gjennom to åpninger 16 forsynt med gitteri. De to friskluftåpninger er ifblge fig. 1 og 2 orientert loddrett i forhold til tegningens plan og fblgelig ikke syn-lige, men de fremgår av fig. 4 og 6. Blikket 32 forlbper til begge sider ut over den ytre kasse 28. Above the box 28, a horizontal fresh air duct 15 is also provided by a cover 32 placed on the upper side, which communicates with the outside air through two openings 16 provided with grating. The two fresh air openings are according to fig. 1 and 2 are oriented vertically in relation to the plan of the drawing and are not necessarily visible, but they appear in fig. 4 and 6. The sheet 32 extends to both sides over the outer box 28.
Ved den ende av forbindelsesåpningen 17 som vender mot veggen 2, er der i den midtre kasse 5 ved 19 lagret et dobbeltspjell 20, hvis halvparter er betegnet med 21 henholdsvis 22. At the end of the connecting opening 17 which faces the wall 2, a double damper 20 is stored in the middle box 5 at 19, the halves of which are denoted by 21 and 22 respectively.
På fig. 1 er spjellet 20 vist i sin ene endestilling, i hvilken forbindelseskanalen 17 er stengt av spjellhalvdeleri 22, In fig. 1, the damper 20 is shown in its one end position, in which the connecting channel 17 is closed by the damper half part 22,
idet den svingt i denne stilling ligger an mot et skrått parti av skilleveggen 29. Den annen spjellhalvdel 21 ligger inntil skilleveggen 18. 1 denne endestilling er avluft-trykkanalen 10, 12 og friskluftkanalen 15 helt åpne. as it is pivoted in this position against an inclined part of the partition wall 29. The other damper half 21 lies next to the partition wall 18. In this end position, the exhaust air pressure duct 10, 12 and the fresh air duct 15 are completely open.
Dobbeltspjellets annen endestilling er vist på fig. 2. 1 dette tilfelle er friskluft-inntakskanalen 15 stengt av spjell-halvdelen 22, mens avluft-trykkanålen 10, 12 er stengt av spjell-halvdelen 21. I tøenne stilling vil hele mengden av avluft som suges ut av rommet 1 ved hjelp av viften 11, fbres tilbake til rommet gjennom dyselegemet 8 og dettes åpning 9. The double damper's other end position is shown in fig. 2. In this case, the fresh air intake channel 15 is closed by the damper half 22, while the exhaust air pressure needle 10, 12 is closed by the damper half 21. In the frozen position, the entire amount of exhaust air that is sucked out of the room 1 with the help of the fan 11, is returned to the room through the nozzle body 8 and its opening 9.
Av fig. 3 og 5 fremgår det at dyselegemets 8 åpning 9 som stenges av et pendelspjell 24 som er svingbart lagret ved dyseåp-ningens nedre kant er forsynt med en motvekt 23. Dette spjell sor-ger for et konstant overtrykk i dysen 8, idet den utstrømmende luft åpner pendelspjellet mot virkningen av motvekten 23. Dysens 8 for-lengede bvre dekkflate 25 hindrer at luften kan avledes oppad av From fig. 3 and 5, it appears that the opening 9 of the nozzle body 8, which is closed by a pendulum damper 24 which is pivotally mounted at the lower edge of the nozzle opening, is provided with a counterweight 23. This damper ensures a constant overpressure in the nozzle 8, as the outgoing air opens the pendulum damper against the action of the counterweight 23. The extended right cover surface 25 of the nozzle 8 prevents the air from being diverted upwards by
det skråttstilte pendelspjell 24. Forlengelser 26 av dysens side-vegger hindrer at avluftstrbmmen kan unnvike til sidene. the inclined pendulum damper 24. Extensions 26 of the side walls of the nozzle prevent the exhaust air stream from escaping to the sides.
Claims (3)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEL43657U DE1959698U (en) | 1966-12-20 | 1966-12-20 | DEVICE FOR VENTILATION OF BUILDING SPACES. |
DEL0055748 | 1967-02-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
NO121419B true NO121419B (en) | 1971-02-22 |
Family
ID=25985614
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO169065A NO121419B (en) | 1966-12-20 | 1967-07-17 |
Country Status (11)
Country | Link |
---|---|
US (1) | US3367258A (en) |
BE (1) | BE696879A (en) |
CH (1) | CH453629A (en) |
DE (1) | DE1679540B2 (en) |
DK (1) | DK125770B (en) |
GB (1) | GB1176995A (en) |
IL (1) | IL27788A (en) |
LU (1) | LU53181A1 (en) |
NL (1) | NL6705043A (en) |
NO (1) | NO121419B (en) |
SE (1) | SE326013B (en) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1176453A (en) * | 1967-08-03 | 1970-01-01 | Germain Courchesne | Combined Intake and Exhaust Vetilator |
US4079665A (en) * | 1976-07-09 | 1978-03-21 | Stanley Irvin Martin | Wall mounted ventilator |
DE2717735C2 (en) * | 1977-04-21 | 1984-07-05 | Esch, Heinrich, Dipl.-Ing., 7090 Ellwangen | Turbo radial fan |
US4526318A (en) * | 1984-06-11 | 1985-07-02 | Stephen T. McGill | Proportional fluid exchanger and recirculator |
DE8619076U1 (en) * | 1985-08-01 | 1991-06-13 | Berner, Erling, Zug | Air control arrangement |
GB8704411D0 (en) * | 1987-02-25 | 1987-04-01 | Gen Electric Co Plc | Cabinet |
US6629886B1 (en) | 2001-01-09 | 2003-10-07 | Kevin Estepp | Demand ventilation module |
US6514138B2 (en) * | 2001-01-09 | 2003-02-04 | Kevin Estepp | Demand ventilation module |
KR100577206B1 (en) * | 2004-05-21 | 2006-05-10 | 엘지전자 주식회사 | Ventilation Systems |
KR100539566B1 (en) * | 2004-05-21 | 2005-12-29 | 엘지전자 주식회사 | air cleaning system with ventilator |
KR100577252B1 (en) * | 2004-06-24 | 2006-05-10 | 엘지전자 주식회사 | Ventilation system with air cleaning |
DE202012003192U1 (en) * | 2012-03-29 | 2013-07-01 | Stiebel Eltron Gmbh & Co. Kg | ventilation |
US10465929B2 (en) * | 2014-01-30 | 2019-11-05 | Finluft Oy | Supply air apparatus |
US10921006B2 (en) * | 2015-11-23 | 2021-02-16 | Cyrous Gheyri | Green HVAC for commercial buildings/warehouses/multi level residentials |
EP3318122A1 (en) * | 2016-11-07 | 2018-05-09 | Fienhage, Hans-Jürgen | Actuating device for inlet air element |
CN107182797B (en) * | 2017-06-23 | 2022-03-25 | 青岛新良牧农业科技有限公司 | Poultry is with pipeline formula new trend heat exchange system |
NL2034254B1 (en) * | 2023-03-02 | 2024-09-09 | M M Beheer B V | Air mixing cabinet |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2212050A (en) * | 1936-12-01 | 1940-08-20 | William J Samuelson | Ventilating system |
US2700331A (en) * | 1951-04-16 | 1955-01-25 | Bryce H Miller | Air circulating unit |
GB1092529A (en) * | 1963-12-30 | 1967-11-29 | Heinz Lohmann | A ventilating device for spaces in buildings |
US3221632A (en) * | 1964-01-13 | 1965-12-07 | Sterilab Inc | Air system for sterile areas |
-
1967
- 1967-02-15 DE DE19671679540 patent/DE1679540B2/en active Pending
- 1967-03-13 LU LU53181D patent/LU53181A1/xx unknown
- 1967-03-21 SE SE03892/67A patent/SE326013B/xx unknown
- 1967-03-28 CH CH433767A patent/CH453629A/en unknown
- 1967-03-30 DK DK170667AA patent/DK125770B/en unknown
- 1967-04-10 NL NL6705043A patent/NL6705043A/xx unknown
- 1967-04-11 BE BE696879D patent/BE696879A/xx unknown
- 1967-04-11 GB GB06415/67A patent/GB1176995A/en not_active Expired
- 1967-04-12 US US630315A patent/US3367258A/en not_active Expired - Lifetime
- 1967-04-13 IL IL27788A patent/IL27788A/en unknown
- 1967-07-17 NO NO169065A patent/NO121419B/no unknown
Also Published As
Publication number | Publication date |
---|---|
LU53181A1 (en) | 1967-05-16 |
NL6705043A (en) | 1968-06-21 |
DK125770B (en) | 1973-04-30 |
DE1679540B2 (en) | 1972-02-24 |
SE326013B (en) | 1970-07-13 |
CH453629A (en) | 1968-03-31 |
IL27788A (en) | 1971-10-20 |
DE1679540A1 (en) | 1971-02-11 |
GB1176995A (en) | 1970-01-07 |
US3367258A (en) | 1968-02-06 |
BE696879A (en) | 1967-09-18 |
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