US896144A - Electrode. - Google Patents

Description

' No. 8%,144. PATENTED AUG. 18, 1908.]

H. PAULING.

ELEOTRODE.

APPLICATION FILED AUG. 13, 1906.

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HARRY PAULING, or eELsENKIRon ii, GER ANY, assieuon. TO THE FIRM OF SALPETERSAURE-INDUSTRIE-GESELLSCHAFT, an. B. H., 0F GELSEN- KIROHEN, GERMAN Y.

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Patented Au 1a, 1908.

Application filed. August 13, 1906. Serial No. 830,386.

To all whom it may concern."

Be itknown that 1,. HARRY PAULING, a subject of the German Emperor, and resident of 84 Wilhelmstras'se, in Gelsenkirchen, in the Kingdom of Prussia, German Empire, have invented certain new and useful Improvements in'Electrodes, of which the folowing is a specification; In the application of electricity to-the treatment of gases containing oxygen, such as air, it has been found advanta eous to use b second-class conductors,'such as melted or liquefied metal-oxids, as material from which to make the electrodes designed for efiecting the electrical discharges. The practical application of this method, however, has been found to involve certain difiiculties and. disadvantages. are entirely formed o second-class conductors, then cu-rrentsof a high tension can: not be made use of, because the points of such electrodes rapidly vaporize under the Themetal-oxid thus formed can no morevaporize, because the electrodes themselves,

' owing to the well-known fact that metal is a good conductor of heat, act to convey, from the points of the electrodes, the greatest part of the heat due to the action of the energy supplied to the electrodes. Such electrodes thus show the advantage possessedby electrodes made of the usual kind of metal, that is, a metal not capable of generating a secondclass conductor, inasmuch as they like these allow of the application of possessed of the advantageous qualities attributed to second-class conductors.-

In the practical application of the new electrodes may proceed as follows: I bring the points of the electrodes into mutual con- For example, if the electrodes the 'pureness of tact, as is common with the usual metal electrodes, and leave them in this state until by.

the passage through of the current the pointsbecome incandescent.

ter oxidize owin to the oxy en contained in the gas to be su jected to t e action of the discharges I I then separate the electrodes so as to form such a distance between their In this state. the lat-.

points that the voltaic arcs generated areof"v the desired length, current-strength, and ten-- .sion.

Electrodes of found to be of high practical value in connection with processes for producing, by elect'rical discharges, nitric acid or nitr1c oxid from air or another mixture of oxy enwith nitrogen, inasmuch as the-metal-oxi formed vaporizes in trifling quantities only, so that the nitric acid or nitric 'oxid produced is not affected. Such is the case so much the moreas these-vaporized quantities of metal oxid are not'soluble' in nitric acid,-

so that they may be "separatedtherefrom in any usual or desired manner.

- The accompanyingdrawingillustrates a form of construction adapted for'electrodes made according to this invention, Fi ure 1 being a front elevation of a pair of we elec trodes and 2 a section op the line A B of Fi 1.

' 3, e are the electrodes and o denotesthe melted metal oxide originated by the action of the nature described are the arcs f. The electrodes are square incross-section (Fig.2) and are at their points provided with coolin --ri bs is formed inte a1.

therewith or secure suitable manner. p A The s uare cross-sectional shape and a horizonta position of the electrodes prevent the melted oxids from dri ping off from the electrodes, While the cooling ribs 7c act like thereto in any ot ier the electrodes themselves to convey the heat originated by the .e'riergysupplied to the electrodes, so as toYprevent the melted oxids from. vaporizing. t a 4 It is to be understood'that I do not desire to confine myself to aparticular sort or composition of metal from. which to make the new electrodes, but that any suitable metal.

may be used within the scope indicated by the appended claim.

What is claimed is:

The herein described process forthe treatment of gases by are dlsch'ar es, consisting in producing melted metal oxi at the points of the electrodes made of a metal enerating the said melted oxids by the action of' the energy supplied to the electrodes used for the production ,of the said arcs, and in maintaining such melted oxids in their liquid state by the said arcs, substantially as set.

orth.

In Witness whereof I have hereunto signed my name this 23rd day of June 1906, in the presence of two subscribing witnesses.

I] A RRY PAU LING.

Witnesses: f

HENRY ll Asrnn, W'OLDEMAR l-IAUPT.

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