CH225062A - Arc lamp with high-melting electrodes arranged immovably relative to one another. - Google Patents
Arc lamp with high-melting electrodes arranged immovably relative to one another.Info
- Publication number
- CH225062A CH225062A CH225062DA CH225062A CH 225062 A CH225062 A CH 225062A CH 225062D A CH225062D A CH 225062DA CH 225062 A CH225062 A CH 225062A
- Authority
- CH
- Switzerland
- Prior art keywords
- electrodes
- arc lamp
- lamp according
- another
- electrodes arranged
- Prior art date
Links
- 238000002844 melting Methods 0.000 title claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000005855 radiation Effects 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 230000001419 dependent effect Effects 0.000 claims 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 238000010792 warming Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052914 metal silicate Inorganic materials 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/52—Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space
- H01J61/523—Heating or cooling particular parts of the lamp
- H01J61/526—Heating or cooling particular parts of the lamp heating or cooling of electrodes
Landscapes
- Furnace Details (AREA)
Description
Lichtbogenlampe mit hochschmelzenden, relativ zueinander unbeweglich angeordneten Elektroden. Die vorliegende Erfindung betrifft eine mit hochschmelzenden, (d. h. einen Schmelz punkt von mindestens 2,000' C aufweisenden.), relativ zueinander unbeweglich angeordneten Elektroden versehene Lichtbogenlampe, wel che derart aufgebaut ist, da,ss bei ihrem Be trieb die Lichtstrahlung von den glühenden Elektroden ausgeht.
Zur Herabsetzung der Zündspannung sol cher Lampen: wurde bereits vorgeschlagen, den Druck des Füllgases der Lampe herab zusetzen. Eine praktische Grenze für diese Massnahme bildet die mit sinkendem Füll druck wachsende Zerstäubung der Elektro den im Betriebe.
Ferner ist es bekannt, zum Verkleinern der Zündspannung Hilfselektroden aus Ma gnesium einzubauen, welche die erforderliche Vorionisation für die Zündung der Haupt elektroden liefern.
Anderseits ist es bekannt, dass bei Lam pen, bei welchen die Lichtstrahlung nicht von den glühenden Elektroden, sondern von Dämpfen und Gasen der Gasstrecke herrührt, durch eine Fremderregung, sei es durch eine Hilfsentladung, sei es durch elektrisch ge heizte Glühdrähte, die Zündspannung herab gesetzt werden kann.
Die Erfindung stellt nun eine Anwen dung des letzteren Mittels bei den eingangs erwähnten Lichtbogenlampen dar. Die erfin dungsgemässe Lichtbogenlampe zeichnet sich somit dadurch aus, dass sie einen Heizdraht aufweist, der den Zweck hat, die Elektroden bei Inbetriebsetzung der Lampe vorzu wärmen.
Es ist dadurch nach ausgeführten Ver suchen möglich, Lichtbogenlampen mit die Lichtstrahlung liefernden, glühenden Elek troden zu bauen, welche sich, ohne Hoch spannungstransformator, von der Nieder spannung des normalen Netzes zünden lässt.
In beiliegender Zeichnung ist ein Aus führungsbeispiel des Erfindungsgegenstan des schematisch dargestellt. In dem geschlossenen Glasgefäss g, das ein chemisch gegenüber den andern Baustof- fen der Lampe indifferentes Gas enthält, sind die Stromzuführungen und Träger a, a, für die Elektroden b,, b2, und c" d, für den Elektroden-Heizdraht c-d, der in Windun gen um die Elektroden verläuft, einge schmolzen.
Die Stromzuführungen c" d, sind unabhängig von denen der Elektroden. Diese bestehen aus hochschmelzenden Metallen, Kohle, Graphit (alles Leiter erster Klasse), Metalloxyden oder Silikaten.
Zur Inbetriebsetzung der Lampe werden <I>a,</I> a, sowie c,, <I>dl</I> an Spannung gelegt; nach kurzer Zeit erfolgt die Zündung des Licht bogens, wonach der Glühdraht c-d von aussen abgeschaltet wird.
Arc lamp with high-melting electrodes arranged immovably relative to one another. The present invention relates to an arc lamp provided with high-melting (ie having a melting point of at least 2,000 'C.) Electrodes which are immovably arranged relative to one another and which is constructed in such a way that the light radiation emanates from the glowing electrodes when it is in operation .
To reduce the ignition voltage of such lamps: It has already been proposed to lower the pressure of the filling gas in the lamp. A practical limit for this measure is the increasing atomization of the electrodes in the company as the filling pressure drops.
It is also known to install auxiliary electrodes made of magnesium to reduce the ignition voltage, which supply the necessary pre-ionization for the ignition of the main electrodes.
On the other hand, it is known that in lamps in which the light radiation does not come from the glowing electrodes, but from vapors and gases in the gas line, the ignition voltage is reduced by an external excitation, be it an auxiliary discharge or an electrically heated filament can be set.
The invention now represents an application of the latter means in the aforementioned arc lamps. The arc lamp according to the invention is thus characterized in that it has a heating wire that has the purpose of preheating the electrodes when the lamp is started up.
It is thus possible to search after executed Ver to build arc lamps with the light radiation delivering, glowing electrodes, which can be ignited by the low voltage of the normal network without a high-voltage transformer.
In the accompanying drawing, an exemplary embodiment from the subject of the invention is shown schematically. In the closed glass vessel g, which contains a gas that is chemically indifferent to the other building materials of the lamp, there are the power supply lines and supports a, a, for the electrodes b ,, b2, and c "d, for the electrode heating wire cd, which runs in turns around the electrodes, melted down.
The power supply lines c "d are independent of those of the electrodes. They consist of refractory metals, carbon, graphite (all first class conductors), metal oxides or silicates.
To start the lamp, <I> a, </I> a, and c ,, <I> dl </I> are connected to voltage; after a short time the arc is ignited, after which the filament c-d is switched off from the outside.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH225062T | 1942-10-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH225062A true CH225062A (en) | 1942-12-31 |
Family
ID=4453839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH225062D CH225062A (en) | 1942-10-15 | 1942-10-15 | Arc lamp with high-melting electrodes arranged immovably relative to one another. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH225062A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2861893A1 (en) * | 2003-08-20 | 2005-05-06 | Hewlett Packard Development Co | THERMALLY OPTIMIZED COLD CATHODE HEATING DEVICE |
-
1942
- 1942-10-15 CH CH225062D patent/CH225062A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2861893A1 (en) * | 2003-08-20 | 2005-05-06 | Hewlett Packard Development Co | THERMALLY OPTIMIZED COLD CATHODE HEATING DEVICE |
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