An Improved Mode of and Apparatus for Generating Ozone by Electricity.
Year: 1891

page_text: Date of Application, 13th Oct, 1891-Accepted, 2nd July, 1892
CODEBELE OF MULEIVATION.
An Improved Mode of and Apparatus for Generating Ozone by
Electricity.
I EMILE ANDREOLI, 18 Somerleyton Road, Brixton, Journalist, do hereby
declare the nature of this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
The object of this invention is the production of ozone by electrifying oxygen, or
atmospheric air, in an apparatus which allows me to obtain larger quantities of
ozone in a cheaper and simpler manner than has been done heretofore.
In the accompanying drawing:
Figure 1 shews a closed box A made of wood, and internally coated with pitch,
or other convenient nonconducting material not acted upon by ozone.
In this box are shewn, mounted, two pairs of a series of plates E and G on an
electric circuit, between which plates EG a dielectric plate F of glass, mica, or
their equivalent, is situated. This box is provided with a false bottom B, which is
pierced with many small holes to admit dry air or oxygen, to be forced, at a con-
venient speed, into the box, by a pump or injector, through a pipe C, for the
purpose of being acted upon in its passage through the box by the electric effluvia
generated therein. The plates E and G are respectively connected with the
opposite poles of an induction coil, or an alternating current dynamo, for the
purpose of producing silent discharges into the air passing through the box.
The air thus submitted to the electric effluvia is more powerfully ozonised than if,
instead of an induction coil, an influence electric machine had been used; and the
ozonised air escaping through the pipe D may be conducted to some receptacle, or
utilized at once.
The box A, which I will call the ozoniser, may be provided with several outlets
and inlets instead of one.
To facilitate the production of ozone from atmospheric air or oxygen, it is
advisable to cool the air or oxygen either by passing it through a coil surrounded
by ice and salt, or other refrigerating compound, or by cooling down the compart-
ment below the false bottom B, or the whole box A, to a low temperature; this
can be done by any known means.
The ozonising plates E G are made of tinned iron, copper, aluminium, or other
convenient metal or alloy, fitted with pins, in such a way that the points of one
plate correspond as nearly as may be with the points on the opposite plate. Each
plate E of the series of pairs will be connected with one terminal of a Ruhmkorff
coil, or with an alternate current dynamo, or some other convenient apparatus for
producing high potential electricity, and the plates G of the series will be similarly
connected with the other terminal of the same apparatus. As the current enters
the receiving plates, a phosphorescent glow, which is the characteristic feature of
the silent discharge, appears on all the points, and illumines the surface of the
interposed dielectric plates F. This is accompanied with the strong, peculiar smell
of ozone.
Through the walls of the ozonizer A pass the wires which connect the plates
with the source of electricity, care being taken that the wires are thoroughly
insulated.
Instead of having the plates arranged in the ozoniser so as to have their points
opposite one to the other, I may have, as in Fig. 2, the points of one plate facing a
plain plate, or, as in Fig. 3, facing balls or small discs carried by a pinned plate.
The point-bearing plates will be preferably made after the manner of gillbars, and
the pins may be protected from oxidation by a coating of tin. Or the points for

page_text: diffusing the electric discharge may be obtained by the employment of wire brushes,
composed of copper or other suitable metal.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what
I claim is :-
1. The production of ozone in large quantities by means of silent discharges in
chambers fitted, as described with reference to Fig. I of the drawing, and through
which atmospheric air or oxygen is caused to circulate, the opposed point-bearing
metallic plates, or their equivalent, representing the opposite poles of an induction
coil or other convenient generator of electricity.
2. The use, in an ozonising apparatus, of a pair or pairs of plain and pinned, or
point-bearing, terminal plates constructed as shewn in Fig. 2, and operating as above
described.
Dated this 12th day of April 1892.
NEWTON & SON,
Agents for the Applicant.
NEWTON & SON,
Agents for the Applicant.