US1221039A - Flame-arc lamp and electrode thereof. - Google Patents

Flame-arc lamp and electrode thereof. Download PDF

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Publication number
US1221039A
US1221039A US6362615A US6362615A US1221039A US 1221039 A US1221039 A US 1221039A US 6362615 A US6362615 A US 6362615A US 6362615 A US6362615 A US 6362615A US 1221039 A US1221039 A US 1221039A
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Prior art keywords
electrode
flame
arc lamp
salts
arc
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Expired - Lifetime
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US6362615A
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Georg Egly
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Siemens AG
Gebrueder Siemens and Co
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Siemens AG
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/022—Manufacture of electrodes or electrode systems of cold cathodes
    • H01J9/025—Manufacture of electrodes or electrode systems of cold cathodes of field emission cathodes

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  • This invention relates to flanie-arc lamps and electrodes therefor ofthe type described and claimed in the U. S. Patent No. 1,132,313.
  • a flame-arc lamp in which the formation of slag on the negative electrode prevented by incorporating salts of the alkalis in the negative electrode as an essel'itial constituent evenly distributed throughout the. entire mass thereof.
  • My invention is diagrammatically represented in the accompanying drawing where in a denotes the upper or positive. and T1 the lower or negative electrode.
  • the former contains an admixture of light-emitting salts, while the latter contains a suitable proportion of boracicacid as an essential ingredient.
  • a flame-arc lamp comprising in combination' a negative electrode. containing as an essential ingredient a slag preventing admixture in the Form of boraeic acid eaenly (llhtl'llillffll throughout the mass of the said electrode, and a positive electrode containing luminous adn'nxtures.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Discharge Lamp (AREA)

Description

G.EGLY. FLAME ARC LAMP AND ELECTRODE THEREFOR,
APPLICATION FILED NOV- 26. l9l5- Patented Apr. 3, i917.
UNITED STATES Parana OFFICE.
GEORG EGLY, 0F BERLIN-TREPTOW, GERMANY, ASSIGNOR TO GEBRUEDER SIEMENS &:
(10., OF BERLIN-TREPTOW, GERMANY,
A GERMAN COYARTNERSHIP.
FLAME-ARQ LAMP AND ELECTRODE THEREFOR.
Specification efiettersPatent.
Application filed November 26, 1815. I Serial No. 63,628,
To all whom it may concern: x Be it known that I Gnoao EGLY. a c1t1- I 1 zen ot the (:erman Empire, and residing at llerlin-'Irept(nv, Germany, have invented certain new and useful Improvements in Flame-Arc. Lamps and Electrodes 'lherefor, of which the following is a specification.
This invention relates to flanie-arc lamps and electrodes therefor ofthe type described and claimed in the U. S. Patent No. 1,132,313. In this patent I have. described a flame-arc lamp in which the formation of slag on the negative electrode prevented by incorporating salts of the alkalis in the negative electrode as an essel'itial constituent evenly distributed throughout the. entire mass thereof.
According to my present invention I employ boracic acid instead of salts oi the alltalis.
lt has been found that horacic acid prozeot: the formation of slag still more effectively than horates or other salts of alkalis and that the light of the are is still steadier. The advantage of boracic acid is found to be particularly greatin open arcdamps, whereas in inclosed arc-lamps the resulting advantage is less marked. It has been found that the beneficial action occurs only when the amount of the admixture exceeds a certain limit depending on the percentage of salt in the positive. electrode. The correct proportion must he found experimentally in each case. For example, when positive earbons are used containing about -30 to 40 per cent. of luminous salts ithas been found that about 3 to 5 per cent. of ordinary b6- racic acid are-requir d according to the nature. of the luminous salts in each case, or a correspondingly smaller quantity when theanhydrite is employed.
My invention is diagrammatically represented in the accompanying drawing where in a denotes the upper or positive. and T1 the lower or negative electrode. The former contains an admixture of light-emitting salts, while the latter contains a suitable proportion of boracicacid as an essential ingredient.
Having thus described my invention I claim as new and desire to secure by Letters Patent of the United States:
A flame-arc lamp comprising in combination' a negative electrode. containing as an essential ingredient a slag preventing admixture in the Form of boraeic acid eaenly (llhtl'llillffll throughout the mass of the said electrode, and a positive electrode containing luminous adn'nxtures.
(mono EGLY.
ratented'a as, 191m
US6362615A 1915-11-26 1915-11-26 Flame-arc lamp and electrode thereof. Expired - Lifetime US1221039A (en)

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US6362615A US1221039A (en) 1915-11-26 1915-11-26 Flame-arc lamp and electrode thereof.

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