US1029886A - Electric furnace for producing gas reactions. - Google Patents

Description

UNITED STATES PATENT OEFICE.

HARRY PAULING, OF GELSENKIRCHEN, GERMANY, ASSIGNOR TO THE FIRM OF SALPETERSAtl'RE-INDUSTRIE-GESELLSCHAFT G. M. B. H., OF COLOGNE, GER- MANY.

T all whom it may concern Be it known that I, I-IARIH Pxtmixo. a

subject of the King of Prussia, residing at Gelsenkirchen, in the Kingdom of Prussia and German Empire, have invented newand useful Improvements in Electric Furnaces for Producing Gas Reactions,vof which the following is a specificationl v This invention relates to electric furnaces for roducin as reactions and it com I. a b I prises suitably arranged mam electrodes and igniting or starting electrodes, and means for water-cooling said igniting electrodes,

-with the main electrodes in order to avoid the use of excessivelyhigh initialrvoltage which would otherwise be necessary to strike an arc directlyvacross theiair gap between the electrode terminals. These igniting or starting electrodes have heretofore been arranged that they become intensely heated by the hot gases in the furnace, in conse-' quence of which they lose their stiffness, become liable to bend, and thus give rise to disturbances. culties and to attain certain added advantages,lprovide means for cooling the igniting electrodes without in anyway interfer ing with their freedom of adjustment. For example, each starting electrode may be laterally inclosed by a water jacket which is best arranged to fit said electrode as closely as is consistent with free longitudinal adjustment of the electrode therein. Since it also is advisable to cool the main as well as the auxiliary electrodes, it is convenient to connect the cooling jacket of an igmiting electrode with the coolin means for an adjacent main electrode. The main electrodes may be hollow. and cooling water may thus hc circulated through them internally from the water jackets of their respective auxiliary electrode or vice versa. A very con- \cnicnt method of :u'rnug'cment and one which ispretcrrcd herein. is to provide within the i-ulttllllt through which coolin; water is supplied to the main electrode, a tube or hol- Fig. 1.

In order to avoid these difli- ELECTRIC FURNACE FOR PRODUCING GAS REEkCTIONS.

Patented June 18, 1912;

I Application filed October 24, 1911. Serial No. 656,471.

low sleeve within which is slidably mounted the igniting electrode. The annular space between the tube and the conduit serves as a jacket wherein water cools the igniting electrode externally and then passes on to'the main electrode which, in the example supposed, is cooled internally. A unitary and compact cooling system is thus provided for preventing undue heating of cithcr the main or the auxiliary electrodes.

In the accompanying drawings, I have shown diagrammatically an assemblage of apparatus elements embodying the present invention. For purposes of illustration the invention is shqwn as applied to diverging electrodes.'

In this showing, Figured is an elevation of an arrangement of electrodes under the present invention, parts being shown in sec-' tion; and Figs. 2 and 3 are cross-sections on,

the lines-AB and C--D, respectively, of

Referring-to the drawings, the igniting electrode rt 1s inclosed in a tube 6 which is surrounded by a second tube In the space between the two tubes water is caused to circulate. As shown, the tube 0 forms with the tube Z) an annular water supply conduitopening directly into the interior of the hol-v low main electrode (Z. In the embodiment here illustrated, this annular conduit is practically an integral extension of the main electrode. \Vater supplied torthe conduit 0- thus first surrounds the tube b containing the igniting electrode and then passes intothe principal electrode, although the opposite course can also he adopted. As the igniting electrode a has a knifeshape it does not entirely fill the guiding pipe Z) and it is therefore necessary toprovide a device to close the end of-said pipe.

i For example,a sleeve. c may be attached. to the end of each igniting, electrode, which sleeve is provided with an external screw thread engaging a corresponding internal thread within the pipe, and is also provided with a longitudinal opening of the same sectional size and shape as the igniting electrode, By turning the sleeve 0 about its axis the igniting electrode can be brought into an exactly vertical position, which is of advantage for the proper working of the apparatus. When the slot of the sleeve c is burned out or stopped up a new sleeve can easily be inserted,

able igniting electrodes jacketed by said annular conduits.

2. An electric furnace comprising in combination, main electrodes, pipes to' supply water to cool said main electrodes, igniting electrodes passing through said pipes, pipes inclosing said igniting electrodes in said water supply pipes, and a sleeve attached to the end of each said igniting electrode, substantially as, and for the purpose, set forth.

3. An electric furnace comprising, in combination, hollow main electrodes, water supply conduits leading to the interior of said electrodes, and i niting electrodes arranged within said conduits,

duit leading to the interior of said electrode,

a tube arranged within said conduit to form a water jacket therewith, and an igniting electrode arranged within said-tube, said igniting electrode being adjustable longitudinally within said tube.

In testimony whereof I have signed my,

name to this specification in the presence of two SHbSCIIbIIIg witnesses.

HARRY PAULING.

Witnesses RICHARD Mmugnn, MARGARETE KiiPPERs.

Copies of this patent may be obtained 10: five cents each; by addressing the Commissioner of Patents, Washington, D. O.

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