US3680281A - Arrangement for electrostatic environmental conditioning - Google Patents

Arrangement for electrostatic environmental conditioning Download PDF

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Publication number
US3680281A
US3680281A US815163A US3680281DA US3680281A US 3680281 A US3680281 A US 3680281A US 815163 A US815163 A US 815163A US 3680281D A US3680281D A US 3680281DA US 3680281 A US3680281 A US 3680281A
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United States
Prior art keywords
air
arrangement
relative humidity
space
enclosed space
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US815163A
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English (en)
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Herbert Jahnke
Constantin Graf Von Berckheim
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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
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/1411—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by absorbing or adsorbing water, e.g. using an hygroscopic desiccant
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/10—Applying static electricity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/192—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by electrical means, e.g. by applying electrostatic fields or high voltages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F2003/144—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by dehumidification only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/20—Humidity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F6/00—Air-humidification, e.g. cooling by humidification
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S261/00—Gas and liquid contact apparatus
    • Y10S261/34—Automatic humidity regulation

Definitions

  • ABSTRACT Wall means defines an enclosed air-conditioning space and is connected to ground potential. At least one electrode is carried by the wall means electrically insulated therefrom and is connected to a positive potential so that an electrostatic field is established between the electrode and the wall means. Further there is provided means operative for maintaining the relative humidity of the air in the enclosed space at a substantiallyconstant level.
  • the present invention relates to electrostatic environmental conditioning in general, and more particuproviding one electrode which is connected to one potential and by connecting the wall bounding the enclosed space to the other potential.
  • the purpose of establishing such a field may be to beneficially influence persons in the enclosed space, such as a room, it having been well established that an effect of wellbeing can be obtained in this manner. Other reasons include the removal of bacteria and aerosols in the airin the space.
  • electrostatic environmental conditioning which includes wall means defining an enclosed air-containing space such as a room or the like. This space is bounded by a plurality of peripheral wall portions connected to ground potential. At least one electrode is carried by one of the wall portions but is electrically insulated therefrom. This electrode is connected to a positive potential with the result that an electrostatic field is established between the electrode and the wall portions. According to our invention we further provide means which is operative for maintaining the relative humidity of the air in this enclosed space at a substantially constant level.
  • FIG. 1 is a schematic elevation of an enclosed space provided with'the arrangement according to our inven- DESCRIPTION OF THE PREFERRED EMBODIMENTS Discussing firstly the embodiment illustrated in FIG. 1 it will be seen that reference numeral 1 identifies an enclosed space which for the sake of convenience shall be assumed to be a room in a building, hereafter to be identified as a room.
  • This room 1 is bounded by wall means comprising peripheral wall portions la and lb with the former here being the ceiling and the latter being the floorand side walls.
  • An electrode 3 is in the illustrated embodiment of FIG. I mounted on the ceiling la via electrically insulating members 2.
  • a source 7 of high direct current is connected via conductor means 8 with the electrode 3 and via conductor means 9 to ground with which the wall portions 1a and lb are also connected.
  • a hygrostatic regulator 10 of known construction* (*e.g., control apparatus AQUATROL W 3020 or W 303a of Honeywell GmbH, Ofienback/Main (Germany)) is provided in the room 1 and measures the relative humidity prevailing in the airin the room 1.
  • an atomizing device 11 (**e.g., Lufibefeuchter Privileg" Typ 99 117 of Jo, Fiirth/Bayem (Germany)) which it controls in such a manner that the device 11 atomizes water-preferably rain water or distilled water derived from the diagrammatically illustrated source-and sprays it into the room 1 in such proportions as to maintain the relative humidity of the air in the room 1 at a constant level, for instance 50 percent.
  • the temperature in a room in a building also remains substantially constant and therefore the relative humidity maintained in the aforementioned manner corresponds to a constant absolute humidity.
  • reference numeral 4 identifies a floor covering such as a carpet, rug or the like and reference numeral 5 a wall covering, with reference numeral 6 identifying a ceiling covering. It will be understood that none of these coverings are necessary for the purposes of the present invention. However, their presence is advantageous and they should at least in part consist of hygroscopic material which is electrically conductive at least when the humidity in the air of room 1 reaches or exceeds a predetennined level. It goes without saying that if the coverings or elements 4, 5 and 6 are present, they will be connected with ground potential. In fact, in
  • the wall portions la and 1b themselves need not be connected to ground potential as long as the elements 4-6 are so connected.
  • the elements 46 may themselves be thought of as part of the wall portions 1a and lb, however.
  • the device maintain the humidity at a constant level of between substantially 40 and 60 percent relative humidity because this is the humidity range which is generally found-even without the presence of an electrostatic field-to be pleasant for human beings. Of course there is no reason why the level could not be changed if this is desired for any reason.
  • the elements 4, 5 and 6 be present, and it is not necessary that they have hygroscopic properties. However, this is preferred and it will be appreciated that in lieu of the elements 4-6 or in addition thereto such hygroscopic properties may also be present in or on pieces of furniture or the like.
  • the hygroscopic property should be such that these elements have at the selected relative humidity a surface conductivity which is constant and is better than that of the air by at least one decimal power, i.e. by at least one power of ten.
  • the atomizer 11 may be of known construction.
  • the atomizer is of the type which imparts to the liquid particles resulting from the atomizing process an electric charge because this increases the ion concentration in the electrostatic field and in turn provides an advantageous influence on the well being of persons exposed to the electrostatic field.
  • This ion production or the production of charge in the particles can occur for instance through the so-called Lenard-Eflect wherein minute electric charge carriers are produced.
  • This eflect is already known and can for instance be observed where cold water is ejected and atomized under high pressure from a showerhead. (*The Lenard-Eflect is described e.g., in Lexikon der Physik, Franckhsche Verlagsbunchmaschine, Stuttgart, 2. Edition, pages 300 and 830.)
  • the water supplied to the atomizer 11 be either rain water or doubledistilled water because the use of other water with its mineral content results in heated rooms in the development of so-called condensation cores whose surface moisture dries quickly, leaving the condensation cores which become deposited in form of a grey coating on exposed surfaces and which further make breathing more difficult because the air appears to be dusty.
  • FIG. 2 differs from that in FIG. 1 in that the humidity control is not the same.
  • the other elements of FIG. 1 may remain unchanged in the embodiment of FIG. 2.
  • an air circulation arrangement 13 which withdraws air from room 1 through a conduit 14 and returns it to the room through a conduit 15. In its path the withdrawn air passes through the drying device 16 of known construction wherein a portion of its humidity is withdrawn, and is then warmed or cooled in a heat exchange device 17 to a desired temperature.
  • a humidifying device 18 again of known construction,* (e.g., an air hurnidifying device of LUWA GmbH, Frankfurt/Main (GermanyD consisting of Zu Kunststoffgerat CH 16 and a washer chamber with pump KSB Typ Eta Block 32/ 16/302) wherein it is enriched with atomized water and then returned through the conduit 15 into the room 1.
  • a thermostat 19 is provided in the room 1 and so controls the heat exchange device 17 that the temperature prevailing in room 1 is maintained constant at a predetermined level.
  • a humidistat 20 (**e.g. AQUATROL W 303a of Honeywell) regulates the moisture in the room 1 and maintains it constant as selected.
  • the drying device 16 assures on the one hand that excess humidity created in the room 1 itself-for instance by the presence of sweating pipes or the like-is removed, and on the other hand provides for a constant necessity of adding new moisture to the circulated air, with the result that new ions are constantly introduced into the room 1 if the device 18 is of the type discussed above which charges the atomized particles.
  • a combination comprising wall means defining an enclosed air-containing space habitable for human beings and bounded by a plurality of peripheral wall portions connected to ground potential; at least one electrode carried by one of said wall portions electrically insulated therefi'om and being connected to a positive potential so that an electrostatic field of predetermined strength is established between said electrode and said wall portions in said enclosed space; and means operative for maintaining the relative humidity of the air in said electrostatic field at a substantially constant level and for thereby preventing changes in said predetermined strength of said electrostatic field due to changes in said level of relative humidity, said means comprising a humidity measuring device located in said space within said electrostatic field and operative for measuring the relative humidity of the ambient air, and an atomizing device operatively associated with said humidity measuring device and responsive to measurements of the same for atomizing water, imparting to it an electric charge, and introducing the atomized charged water into the air in said space
  • said atomizing device being operative for maintaining the relative humidity of the air in said enclosed space at a level between substantially 40 and 60 percent.
  • said wall means consisting at least in part of material having hygroscopic properties so selected as to have at said level of relative humidity a constant electrical surface conductivity which is greater than that of the air in said space.
  • said atomizing device being a Lenard-Effect atomizer for atomizing water and introducing the same in ionized condition into the air in said enclosed space.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Radiology & Medical Imaging (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Biomedical Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Air Humidification (AREA)
  • Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
  • Elimination Of Static Electricity (AREA)
  • Building Environments (AREA)
US815163A 1968-04-11 1969-04-10 Arrangement for electrostatic environmental conditioning Expired - Lifetime US3680281A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681778257 DE1778257B1 (de) 1968-04-11 1968-04-11 Anordnung zur Elektroklimatisierung

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US (1) US3680281A (de)
AT (1) AT299494B (de)
BE (1) BE730789A (de)
CH (1) CH510854A (de)
DE (1) DE1778257B1 (de)
FR (1) FR2006031A1 (de)
GB (1) GB1260930A (de)
IE (1) IE32711B1 (de)
IL (1) IL31927A (de)
NL (1) NL142230B (de)
NO (1) NO122941B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3894852A (en) * 1973-06-16 1975-07-15 Berckheim Graf Von Electrode arrangement for establishing a steady or constant electric field
US4025323A (en) * 1975-02-22 1977-05-24 Berckheim Graf Von Electrostatic precipitator with television receiver
US4114205A (en) * 1976-04-08 1978-09-19 Mueller Guenter Sauna
US4911737A (en) * 1987-12-28 1990-03-27 American Environmental Systems, Inc. Apparatus and method for environmental modification
US5010777A (en) * 1987-12-28 1991-04-30 American Environmental Systems, Inc. Apparatus and method for establishing selected environmental characteristics
US5410922A (en) * 1992-03-31 1995-05-02 Nsk Ltd. Locating table apparatus
US20060156925A1 (en) * 2005-01-20 2006-07-20 Libera John P Electrostatic precipitator incorporated in another high-voltage device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5449376A (en) * 1993-06-17 1995-09-12 Richard J. Fox System and method for producing highly amplified radio signals for feedback into the human body

Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1127897A (en) * 1912-05-18 1915-02-09 John H Kellogg Method of therapeuctic treatment and apparatus therefor.
US1656414A (en) * 1924-12-17 1928-01-17 Universal Humidifying Company Humidifying apparatus
US1820734A (en) * 1929-01-09 1931-08-25 Siemens Ag Gas purifying plant
US1940198A (en) * 1932-01-27 1933-12-19 Frederick H Wagner Apparatus for cleaning gas
US2017027A (en) * 1931-08-19 1935-10-08 Henry O Forrest Method of air conditioning
US2043217A (en) * 1933-05-04 1936-06-02 Carrier Engineering Corp Method and means for controlling the ionic content of air
US2060842A (en) * 1932-01-21 1936-11-17 Herman Seid Method and means for controlling ionic content of air
US2063960A (en) * 1930-06-23 1936-12-15 Gen Motors Corp Refrigerating apparatus
FR816463A (fr) * 1937-01-19 1937-08-09 Ionisateur et procédé d'ionisation pour l'émission de radiations d'un seul signe
US2090466A (en) * 1935-03-30 1937-08-17 Francis R Bichowsky Means for humidifying and drying air
US2107268A (en) * 1935-11-29 1938-02-08 Avery Engineering Company Apparatus for conditioning air
US2241060A (en) * 1939-08-24 1941-05-06 Gen Electric Heat pump system
US2864456A (en) * 1955-08-02 1958-12-16 Research Corp Automatic control for electrical precipitators
CH337178A (de) * 1955-04-07 1959-03-31 Eei Etabl Electrovit Internati Raum-Elektrofilteranlage zur Luftreinigung auf elektrostatischer Grundlage
US3311108A (en) * 1962-02-26 1967-03-28 Cristofv Cristjo Means for artificially producing and controlling electric power field strengths and freely suspended ions in the atmosphere
US3417302A (en) * 1962-02-09 1968-12-17 Holger George Lueder Apparatus for the production of unipolar ions in the air of a room
US3483672A (en) * 1967-02-27 1969-12-16 Berckheim Graf Von Means for establishing an electrostatic field in an inhabitable enclosure
US3531150A (en) * 1967-06-06 1970-09-29 Berckheim Graf Von Electrostatic conditioning arrangement
US3534530A (en) * 1966-02-02 1970-10-20 Alfred Hornig Device for producing electric fields
US3541390A (en) * 1967-05-02 1970-11-17 Berckheim Graf Von Steady-field generating arrangement

Patent Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1127897A (en) * 1912-05-18 1915-02-09 John H Kellogg Method of therapeuctic treatment and apparatus therefor.
US1656414A (en) * 1924-12-17 1928-01-17 Universal Humidifying Company Humidifying apparatus
US1820734A (en) * 1929-01-09 1931-08-25 Siemens Ag Gas purifying plant
US2063960A (en) * 1930-06-23 1936-12-15 Gen Motors Corp Refrigerating apparatus
US2017027A (en) * 1931-08-19 1935-10-08 Henry O Forrest Method of air conditioning
US2060842A (en) * 1932-01-21 1936-11-17 Herman Seid Method and means for controlling ionic content of air
US1940198A (en) * 1932-01-27 1933-12-19 Frederick H Wagner Apparatus for cleaning gas
US2043217A (en) * 1933-05-04 1936-06-02 Carrier Engineering Corp Method and means for controlling the ionic content of air
US2090466A (en) * 1935-03-30 1937-08-17 Francis R Bichowsky Means for humidifying and drying air
US2107268A (en) * 1935-11-29 1938-02-08 Avery Engineering Company Apparatus for conditioning air
FR816463A (fr) * 1937-01-19 1937-08-09 Ionisateur et procédé d'ionisation pour l'émission de radiations d'un seul signe
US2241060A (en) * 1939-08-24 1941-05-06 Gen Electric Heat pump system
CH337178A (de) * 1955-04-07 1959-03-31 Eei Etabl Electrovit Internati Raum-Elektrofilteranlage zur Luftreinigung auf elektrostatischer Grundlage
US2864456A (en) * 1955-08-02 1958-12-16 Research Corp Automatic control for electrical precipitators
US3417302A (en) * 1962-02-09 1968-12-17 Holger George Lueder Apparatus for the production of unipolar ions in the air of a room
US3311108A (en) * 1962-02-26 1967-03-28 Cristofv Cristjo Means for artificially producing and controlling electric power field strengths and freely suspended ions in the atmosphere
US3534530A (en) * 1966-02-02 1970-10-20 Alfred Hornig Device for producing electric fields
US3483672A (en) * 1967-02-27 1969-12-16 Berckheim Graf Von Means for establishing an electrostatic field in an inhabitable enclosure
US3541390A (en) * 1967-05-02 1970-11-17 Berckheim Graf Von Steady-field generating arrangement
US3531150A (en) * 1967-06-06 1970-09-29 Berckheim Graf Von Electrostatic conditioning arrangement

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* Cited by examiner, † Cited by third party
Title
Winsor et al., Biologic Effects of Ionized Air in Man, Reprint from American Journal of Physical Medicine, Vol. 37, No. 2, April 1958, pages 83 89 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3894852A (en) * 1973-06-16 1975-07-15 Berckheim Graf Von Electrode arrangement for establishing a steady or constant electric field
US4025323A (en) * 1975-02-22 1977-05-24 Berckheim Graf Von Electrostatic precipitator with television receiver
US4114205A (en) * 1976-04-08 1978-09-19 Mueller Guenter Sauna
US4911737A (en) * 1987-12-28 1990-03-27 American Environmental Systems, Inc. Apparatus and method for environmental modification
US5010777A (en) * 1987-12-28 1991-04-30 American Environmental Systems, Inc. Apparatus and method for establishing selected environmental characteristics
US5410922A (en) * 1992-03-31 1995-05-02 Nsk Ltd. Locating table apparatus
US20060156925A1 (en) * 2005-01-20 2006-07-20 Libera John P Electrostatic precipitator incorporated in another high-voltage device

Also Published As

Publication number Publication date
FR2006031A1 (de) 1969-12-19
IL31927A0 (en) 1969-05-28
CH510854A (de) 1971-07-31
IE32711B1 (en) 1973-10-31
IL31927A (en) 1972-06-28
NL142230B (nl) 1974-05-15
DE1778257B1 (de) 1970-05-14
AT299494B (de) 1972-06-26
BE730789A (de) 1969-09-01
IE32711L (en) 1969-10-11
GB1260930A (en) 1972-01-19
NL6905314A (de) 1969-10-14
NO122941B (de) 1971-09-06

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