US905557A - Arc-light electrode. - Google Patents

Description

and

-a result electrodes containing UNI ED STATES PATENT OFFICE.

BERTHOLD uoruscn, or BERLIN, GERMANY, asslcnoa TO GENERAL ELECTRIC comm,

A CORPORATION OF NEW YORK.'

ans-menu? ELECTRODE.

Specification of Letters Patent.

named Dec. 1, 1008.

Application fled my 16, 1906; Serial no: 317,168.

To all whom it meg concern: i Be it known that I, BERTHOLD Mosason, a subject of the King and useful Improvements in Arc-Light Electrodes, of which the following is a specification.

My present invention relates to are light electrodes composedprincipallyor in part ofunds, such as etite, titanium oxid, titanium carbid,

an the like; Such compounds form highly desirable constituents for are light electrodes, for electrodes used as the negative electrodes of direct current are lamps, as suitably formed electrodes consuch compounds in suitable amounts 'yield hly efiicient flaming or luminous arcs. T e inaterials spec ified" above are characterized, however, by the fact that they become fluid at a temperature appreciably lower. than that at which they vaporize. As

have formed'on their arcing erids pools of melted material. Such a pool may be obj ectionable especially when such an electrode is employed as a negative where the pool is large the are extending from it "gnay bevery unstable,the end the are; continually wande about on the surface of the, pool, thus p ucing an undesirable flickerin I have'discovered that. by adding si icon carbid referably in a finely powdered state,

to an e ectrode containing one or more ofthe metallic compounds specified, this flickering reduced .or entirely done may be tly v gr roduce the best results the away with. To silicon .carbid' mingled with the metallic compound or comof Prussia, residing at Berlin, Germany, have invented certain new city 'work or bridge, soto speak, of

a quietly burning,

them tend to ould be thoroughly compounds throughout the electrode which eformed in the usual manner; I attribute the results arising from the use of silicon carbid in this manner, to the great heat capaof the silicon carbid wherebyxwithout fusin itself it takes up heat from the melted meta compounds. 'lhe presence of silicon carbid insures that thearcing end of such an electrode is 'at all. times covered bye-net unfusedsilicon carbid, which results in are. .The siliconcarbid content of such an electrode may vary between quite wide limits depending on the circumstances of the I have obtained eircellent results electrodes containing irom 5 to 90 per cent.

' of silicon carbid, though ordinarily I prefer to keep the silicon carbid content materiall below the higher limit mentioned.-

What I claim'as new. and desire to secure by Letters Patent of the United States, is,

1. An are H ht electrode composed of one or more'meta ic compounds with 5 to 90 percent. of silicon carbld. V

2. An arclight electrode composed of one or more metallic compounds mixed with several per cent. of silicon carbid. V p

3'.- An are light electrode composed of one:

"or more metallic compounds intimately mixed with several percent. dered silicon carbid..

of finely pow- In witness whereof, I have hereunto set hand this 24th day of April, 19Q6. BERTHOLD MONASCH; 'Witnesses: i

JULIUS. RUMLAND, v OSKA'R SINGER.