CH206301A - Process for gilding grids for discharge tubes. - Google Patents
Process for gilding grids for discharge tubes.Info
- Publication number
- CH206301A CH206301A CH206301DA CH206301A CH 206301 A CH206301 A CH 206301A CH 206301D A CH206301D A CH 206301DA CH 206301 A CH206301 A CH 206301A
- Authority
- CH
- Switzerland
- Prior art keywords
- grids
- discharge tubes
- gilding
- gold
- plating
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
- H01J19/28—Non-electron-emitting electrodes; Screens
- H01J19/30—Non-electron-emitting electrodes; Screens characterised by the material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
- H01J2893/0012—Constructional arrangements
- H01J2893/0019—Chemical composition and manufacture
Landscapes
- Electroplating Methods And Accessories (AREA)
Description
Verfahren zur Vorgoldung -von Gittern für Entladungsrühren. Die Erfindung betrifft ein Verfahren zur Vergoldung von Gittern für Entladungsröhren, insbesondere Elektronenröhren.
Es wurde gefunden, dass die auf elektro lytischem Wege aufgebrachten Goldbeläge nicht ohne weiteres genügend geschlossen, sondern zumeist Gas eittbaltende Blasen auf weisen, was für den Betrieb der Röbre schäd lich ist.
Erfindungsgemäss werden zur Erzen- gung des die Vergoldung bildenden Belages mehrere dürine Schichten nacheinander el*-- trolytisch aufgebracht und nach jeder Auf bringung einer solchen Schicht eine Ausbei- zung derselben in einer inerten Gasatmo sphäre vorgenommen, wodurch die Gase aus der Metallschicht ausgetrieben werden.
Es ist zweckmässig, das Verfahren so oft zu wiederholen, bis der Belag eine genügende Dicke aufweist.' Die Ausbeizungstemperatur liegt zweckmässig um den Schmelzpunkt des (-r'oldes herum, zweckmässig etwas niedriger, z. B. bei<B>1000 0 0.</B>
Process for pre-gold plating of grids for discharge stirring. The invention relates to a method for gold-plating grids for discharge tubes, in particular electron tubes.
It has been found that the electrolytically applied gold coatings are not readily closed enough, but mostly have gas-containing bubbles, which is detrimental to the operation of the Röbre.
According to the invention, to produce the coating forming the gold plating, several thin layers are applied electrolytically one after the other and after each application of such a layer it is excavated in an inert gas atmosphere, thereby expelling the gases from the metal layer.
It is advisable to repeat the process until the covering is sufficiently thick. The pickling temperature is expediently around the melting point of the (-r'oldes, expediently somewhat lower, for example at 1000 0 0)
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH206301T | 1938-05-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH206301A true CH206301A (en) | 1939-07-31 |
Family
ID=4444999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH206301D CH206301A (en) | 1938-05-06 | 1938-05-06 | Process for gilding grids for discharge tubes. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH206301A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1021502B (en) * | 1956-02-01 | 1957-12-27 | Philips Nv | Process for producing electrodes with low thermal emission for electrical discharge tubes and electrical discharge tubes with at least one electrode produced by this process |
| DE1100182B (en) * | 1959-09-08 | 1961-02-23 | Iapatelholdia Patentverwertung | Non-emissive electrode for electrical discharge vessels and process for their manufacture |
| DE1108816B (en) * | 1959-04-03 | 1961-06-15 | Siemens Ag | Metal parts of electrical discharge vessels with a thin gold coating |
-
1938
- 1938-05-06 CH CH206301D patent/CH206301A/en unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1021502B (en) * | 1956-02-01 | 1957-12-27 | Philips Nv | Process for producing electrodes with low thermal emission for electrical discharge tubes and electrical discharge tubes with at least one electrode produced by this process |
| DE1108816B (en) * | 1959-04-03 | 1961-06-15 | Siemens Ag | Metal parts of electrical discharge vessels with a thin gold coating |
| DE1100182B (en) * | 1959-09-08 | 1961-02-23 | Iapatelholdia Patentverwertung | Non-emissive electrode for electrical discharge vessels and process for their manufacture |
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