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Publication numberUS871652 A
Publication typeGrant
Publication dateNov 19, 1907
Filing dateAug 23, 1906
Priority dateAug 23, 1906
Publication numberUS 871652 A, US 871652A, US-A-871652, US871652 A, US871652A
InventorsFrank A Ward
Original AssigneeFrank A Ward
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 871652 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

No. 871,652. PATBNTBD Nov. 19, 1907.




511+ we u I'oz Siren/:atp



speciation of Letters Patent.

Patented Nov. 19, 1907.

Application filed August 23, 1906- Serial No. 331,787-

' '10 all whom it may concern:

Be it known that I, FRANK A. WARD, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented certain new and useful Improvements in Air-Purifiers; and I do declare the following to be full, clear, and exact description ofthe invention, such as will enable others skilled in the artto which it appertains to make and use the same.

This invention relates to improvements in apparatus for purifying or ,ozonizing air, by means of the discharge of an electric current of high potential. l

One object of the invention is to improve and simplify the construction ofdevices of this character, and thereby render the same more elicicnt and less expensive.

Anotherobject of the invention is to provide a simple and practical apparatus of this character, which may be connected to the ordinary 110 volt electric light circuit, and thus conveniently used in sick rooms.

lNith the above and other objects in view, the invention consists in the construction, combination and arrangement of parts hereinafter described and claimed.

In the accompanying drawings,-Figure 1 is a perspective view of my improved air-purifier; Fig. 2 is a horizontal sectional view through the same; and Fig. 3 is a transverse sectional view through the two electrodes and the cylinder ofglass or dielectric material, which separates them.

The apparatus comprises a Wall of glass or other dielectric material 1, having arranged upon opposite sides and in contact therewith electrodes 2, 3, which are connected to a source of alternating currents, here shown in cylinder 1.

the form of a transformer 4, having its secondary coil 5 connected by conductors 6 to said electrodes and its primary coil 7 connected by conductors 3 to a suitable 'electric generator 9. The dielectric wall v1 is preferably of cylindrical form and has the electrode 2 arranged within it. This electrode 2 comprises a concentrically-disposed metallic rod 10, to which one of the conductors 6 is connected, and a lurality of disks 11, the latter being formed y stamping them from sheet metal. These 'disks 11 are arranged at suitable intervals along the rod 10 and have theirl peripheries or edges notched to form points, which engage the vinner surface of the glass The outer electrode 3 is in the form of a metallic cylinder which snugly fits the outer surfaces of the glass cylinder 1, and is formed with perforations 12, as clearly shown in Figs. 2 and 3 of the drawings.- The other conductor 6 connects this cylinder to one of the coils 5 of the transformer. This outer perforated cylindrical electrode closely hugs the dielectric tube, and the perforations therein form the'points necessary to cause a blue name-to be emitted from practically the entire surface of said electrode, said name streaming from the edges of each perforation and the airor oxygen passing through` the 1 perforation 13 is thereby quickly converted into ozone. By making the inside electrode in the form of stamped disks mounted with their points in contact with the dielectric tube on its inner=face, the ozone after being formed is permitted to escape freely.

The apparatus is preferably mounted in a casing 13, here shown 1n the form of a rectangular wooden boX having openings v14 mlts top and ends', covered by a screen 15, so that air may readily pass through the box and the cylinder 1. Handles 16 are preferably y arranged upon opposite sides of the box and at one of its ends are insulators 17, through which the conductors '8 pass. Vhile the transformer 4 may be wound for a current of any desired strength, the one shown in the.

drawing is Wound for the usual 110 volt alternating electric light current, and the conductors 8, shown in Fig. 1, are connected to a screw-plug 18, which may be readily screwed vinto the ordinary electric lamp socket.

The construction, operationl and advantages of the invention will be readily understood from the foregoing description, taken in connection with the accompanying drawings. It Willbe seen that when a current of low potential passes through the primary coil 7 of l current of hi yh potential will be produced in the circuit o the secondary coil 5, the conductors 6 and the electrodes .2 3, so that the discharge of a current of high potential will be produced and air or oxygen passing through the box or casing 13 will be converted into ozone, or, in other words,purified.

While I have shown but one of the tubes or cylinders 1, mounted within the box or casing 13, itv will be understood that any number may be employed.

proportion and the minor details of construction may be resorted to without departing It will also `be understood that various changes in the form,

he transformer 4., an'alter'nating from the principle or sacrificing any of the scribed, a cy and a source of alternating currents con-l nectedto said electrodes. f

2. In an apparatus of the character described, a tube of dielectric material, a oint bearing electrode arranged Within sai( tube and having its points in contact therewith,

a smooth perforated sheet metal tubular electrode surrounding the outside of said dielectric tube and in close contact therewith,

and a source .of alternating currents connected to said electrodes.

, 3. In an -apparatus of scribed, a tube of dielectric material, la ointbearing electrode arranged Within sai tubeI and having its points in contact therewith, a smooth perforated sheet metal tubular electrode surrounding the outside of said dielectric tube and in close contact therewith, and a transformer' having Yits secondary coil connected to said electrodes and its primarycoil to a source o electrical supply.

4. In an apparatusof the character fle- 'nder-"of dielectric material, a

the character dei point-bearing electrode arranged Within saidtube and com risin a metalllc rod carryln' g a plurality ofpspacegd metallic disks having points upon their peripheries in contact vwit said cylmder, a smooth cylindrical metallic electrode formed withperforations and surrounding the exterior of the dielectric cylinderA and in close/contact therewith', and a transformer having its secondary coil connected to said electrodes, and -its primary coil to a source of electrical supply.

5. In an a paratus of the character described, a cy inder of dielectric material, a

point-bearing electrode arranged within said 'tube and com rising a`metall1c rod carrying spaced metal c disks havingv points u on t eir .peripheries in contact wit said cy inder, a smooth cylindrical metallic electrode formed with erforations and surrounding the exterior o1P the dielectric cylinder and in close contact therewith, a transformer having its secondary coil connected to said electrodes and its primary coil to a source ofl electrical supply, and a casing mclosing said transformer and electrodes .and provided withscreened openings.

' In testimony whereof my hand in presence of two subscribing Witnesses. FRANK A. WARD.



I have hereunto set A

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2983847 *Jun 9, 1959May 9, 1961Walter SpenglerApparatus for grounding electrostatic charges
US3110580 *Apr 14, 1960Nov 12, 1963Strubler GordonDevice for agglomerating microscopic particles
US3898468 *Jul 3, 1973Aug 5, 1975Brunet GeorgesElectric device for the treatment of a gaseous fluid
US4049400 *Apr 7, 1976Sep 20, 1977Bennett R JacksonAir purifying apparatus
US5061462 *Sep 27, 1989Oct 29, 1991Nagatoshi SuzukiApparatus for producing a streamer corona
US5084078 *Nov 28, 1990Jan 28, 1992Niles Parts Co., Ltd.Exhaust gas purifier unit
US7465338Jul 19, 2006Dec 16, 2008Kurasek Christian FElectrostatic air-purifying window screen
US20070034081 *Jul 19, 2006Feb 15, 2007Kurasek Christian FElectrostatic Air-Purifying Window Screen
Cooperative ClassificationC01B13/11