US 1157859 A
Description (OCR text may contain errors)
W. O. FREET.
APPLICATION FILED SEPT-9.19M. FI 5 Patented Oct. 26, 1915.
' FIG, 2
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WILLIAM 0. seem,
OF HACKENSACK, NEW JERSEY, ASSIGNOR TO STEYNIS OZONE COMPANY, A CORPORATION OF NEW YORK.
Specification of Letters Patent.
Patented Oct. 26, 1915.
Application filed September 9, 1912. Serial No. 719,295.
.useful Improvements in Ozone-Generators,
of which thefollowing is a description.
My invention relates to ozone generators in which ozone is generated by streaming discharges of high potential electricity between electrodes cooled by .means of ammonia, brine or other suitable cooling fluid.
One of the objects of my invention is to provide av generator of this kind which shall be strong and durable and from which a high degree of eliiciency may be obtained by certain improvements in the cooling means and in the electrodes.
A further object of my invention is to prevent the short-circuitingof the apparatus by moisture.
Other objects are to simplify the construction, render it less liable to derangement and safer to use.
In the drawings accompanying my specification I have shown at Figure l a vertical section of my improved. ozone generator; at Fig. 2 a vertical section taken at right angles to Fig. 1 through the line A B C. In Fig. 3 I have shown a horizontal crosssection taken on the line D E F.
Referring to the drawings in which I have shown the preferred form of my improved ozone generator, it will be seen that it consists of an outer shell or box 1, which box is as nearly air-tight as practicable, and is electrically grounded.
At the top of box 1 is located a cover 2 having a glass top 3 to permit inspection of the parts without opening the box. Cover 2 is attached to box 1 by any suitable means.
Resting upon the bottom of box 1 is a supporting member 4 having formed therein supporting tubes 5 and pipe 6 connecting tubes 5 in any desired order. Supporting member 4 also is provided with flanges 7 to en port the electrode 8.
assing through supporting member a and located within the hollow electrode 8 are pipes 9 and 10 carrying the cooling fluid. Pipe 10 fits closely within the electrode 8. Pipe 9 is mounted concentrically with pipe 10 and is of smaller diameter, thus forming a duct between pipes 9 and 10 through which the cooling fluid may circulate. Electrode 8 is preferably formed with a spiral groove. so as to produce a large area ofldischarge throughout its length and extends from supporting member 4 upward to a spider 11 located at its top.
Supported by supporting member 4 and surrounding electrode 8, but slightly removed from it, is the dielectric tube 12, preferably of mica or similar material, which also extends from supporting member tupward to meet the spider 11 located at the top of electrode 8. The distance between dielectric tube 12 and electrode 8 is determined by the supporting tubes- 5,-
fianges 7 and spider 11. Dielectric tube 12 passes through the upper end of box 1 into a dielectric holder 13 which rests upon the top of box 1 and closely encircles dielectric tube 12. Dielectric holder 13 is formed w1th pipe 14 for allowing air to be supplied to the generator, or ozone to be drawn 0ft therefrom and with a glass sight cap 15 for 17 held in the wall of box 1 and is connected to a frame composed of a plurality of fiat plates 18 in which the tubes 19, which constitute the other electrodes and which surround the dielectric tube 12, are mounted. Plates 18 are held together by means of rods 20, and the entire structure is supported upon insulators 21 which may be made flexible if desired, so that it may readily move within box 1 or expand with the heat generated Without exerting any strain upon the dielectric tube 12, which, being constructed of mica or similar material, is relatively weak.
In prior ozone generators a great deal of trouble has been experienced through the collection of moisture at the bottom of the apparatus, causing short-circuits, and to 0bviate this I have inclosed the entire appara- V tus in the air-tight box 1, and have provided a drying element consisting of a 'tube 22 which is tightly fitted in boX 1. This tube has a portion of its wallscut away and conv tains chlorid of calcium or a similar drying material 23 which absorbs any moisture whichmay be present in box 1. -Short-cir-- cuiting through moisture is also obviated by the arrangement of the air inlet whereby the air is admitted to the space between the dielectric and electrode 8 and not outside of the electrodes as in prior generators.
. The operation of my improved device is as follows: It will be understood that the hightension current is brought through plug 16 so that tubes 19 constitute one end of the circuit; Box 1 is grounded, and electrodes 8, being connected thereto, constitute the other end of the circuit. It will be noted that the- 12 of the right hand system of electrodes.
It then passes through passage 6 formed. in supporting member 4 and upward between the inner electrode and dielectric of the left hand system of electrodes, and out through the left hand orifice, as indicated by the arrow. While passing between the electrodes it is subjected to the effect of the discharge across the gap, the electrodes being spirally grooved, producing an extremely large discharge area, and is therefore changed into ozone and leaves the apparatus as such.
The cooling fluid is fed to the machine in-the opposite direction from the air so that the hottest air or ozone will come in contact with the cooling fluid first. The cooling fluid enters through left-hand pipe 9 as .indicated by the arrow and fiows upward through the inner tube located in the lefthand system of electrodes, out over its top, and downward between the inner tube'9 and the outer tube 10. The cooling fluid is thus brought into direct contact with the electrode and is therefore in position to exert its 'maximum effect. Placing the cooling tubes inside the electrodes permits the outside of electrode 8 to be used as the discharge area, which greatly increases the discharge area for an electrode of a,given size. The cooling fluid then passes down and through passage ,-upward in the space between the right-hand tube' 9 and the tube 10 of the right-hand system of electrodes,.thence downward through tube 9 and out, as indi cated by the arrow.
While I have shown two systems of electrodes and cooling pipes only, it should be understood that the number of such systems may be multiplied indefinitely and that they may be connected together in different manners. I am aware that many modifications may be made in thedevice I have shown and described, and I therefore do not desire to be confined to that exact form.
What I claim and desire to secure by Letters Patent is: Y
1. In an apparatus for the production of ozone, a discharge electrode having a spirally-grooved surface. i
2. In an apparatus for the production of ozone, an airtight box inclosing the entire apparatus, a tube removably inserted in said box and having a portion-of its walls cut away, and a substance adapted toabsorb moisture in said tube.
3. In an apparatus for the production of ozone, an air-tight box inclosing the entire apparatus, a stationary electrode and a removable electrode surrounding the stationary electrode.
4. In an apparatus for the production of .ozone, an air-tight box containing a stationary electrode having a spirally-grooved surface and a removable electrode surrounding the stationary electrode.
5. In an apparatus for the production of v ozone, a dielectric tube and a cap closely surrounding saidtube,said cap being pro vided with an orifice and a transparent cover.
6. In an apparatus for the production of ozone, an outer electrode in the form of atube, an inner electrode concentrically arranged with the outer electrode, said inner electrode having a spirally-grooved surface, a dielectric interposed between the electrodes,.and a tube for the introduction of cooling fluid concentrically mounted within the inner I electrode and of a suiHciently small diameter to allow a space between it and the walls of the inner electrode.
7. In an apparatus for the production of ozone, a plurality of sets of concentrically mounted electrodes eacliin the form of a tube, a cooling fluid pipe concentrically mounted within each. set of "electrodes'and of a 'sufliciently small diameter to allow a space between the inner electrodeand the pipe, a member adapted 'tofconn'ecu the spaces between the outer. and inner elec-' trodes of the various'sets and a member adapted 'to connectythe spacesbetween the cooling fluid pipes and the inner electrodes of the various sets. 7
ozone, a plurality of electrodes each in the form of a tube, a pluralityof dielectric tubes concentrically mounted .within said electrodes, and means for holding said elec- 8. In an apparatus for the production of.
trodes in a fixed position with respect to each other while permitting movement thereof relatively to the dielectric tubes,
9. In an apparatus for the production of ozone, a plurality of electrodes each in the,
form of a tube, a plurality of dielectric my name in the presence of two witnesses tubes concentrically mounted Within said this 7th day of September, 1912. electrodes, a plurality of plates through which said electrodes pass and by which VILLIAM FREET 5 they are supported, and a plurality of rods \Vitnesses:
passing through said plates. MARGARET MACINTYRE,
In witness whereof I have hereunto signed WALTER S. JONES.