AT116277B - Vacuum tube. - Google Patents

Vacuum tube.

Info

Publication number
AT116277B
AT116277B AT116277DA AT116277B AT 116277 B AT116277 B AT 116277B AT 116277D A AT116277D A AT 116277DA AT 116277 B AT116277 B AT 116277B
Authority
AT
Austria
Prior art keywords
vacuum tube
oxides
zwisehengläser
calculated
desc
Prior art date
Application number
Other languages
German (de)
Inventor
Gottfried Bruno Jonas
Original Assignee
Philips Nv
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Nv filed Critical Philips Nv
Application granted granted Critical
Publication of AT116277B publication Critical patent/AT116277B/en

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  • Vessels And Coating Films For Discharge Lamps (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



  Vakuumröhre. 
 EMI1.1 
 

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   Als Lichtquellen, die ultraviolettes Licht ausstrahlen, können Temperaturstrahler benutzt werden, die zweckmässig selektiv im Ultravioletten strahlen, besonders aber   Entladungsrohren,   die von einer Glimmlicht-, Säulen oder Bogenentladung erzeugtes ultraviolettes Lieht ausstrahlen.

   Bei Verwendung einer Oxydkathode als Glühkathode kann, wenn nur der Druck der   Gasfüllung   und der Elektrodenabstand geeignet gewählt werden, die   Bogehspannung   unter der   Ionisationsspannung des Gases   liegen. 
 EMI2.1 
 mehrerer aneinander angeschmolzener Zwischengläser mit   abgestuften Ausdehnungszahlen mit   einem Glasteil verbunden ist, dadurch gekennzeichnet, dass von den   Zwisehengläsern,   welche vorzugsweise Borsäure sowie auch einen hohen Gehalt an Kieselsäure enthalten, wenigstens das unmittelbar an dem Quarzteil angeschmolzene praktisch von Oxyden der Alkalimetalle frei ist.



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  Vacuum tube.
 EMI1.1
 

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   As light sources that emit ultraviolet light, temperature radiators can be used which expediently selectively emit in the ultraviolet, but especially discharge tubes which emit ultraviolet light generated by a glow, column or arc discharge.

   When using an oxide cathode as a hot cathode, if only the pressure of the gas filling and the electrode spacing are selected appropriately, the arc voltage can be below the ionization voltage of the gas.
 EMI2.1
 Several intermediate glasses fused to one another with graded expansion coefficients are connected to a glass part, characterized in that of the intermediate glasses, which preferably contain boric acid as well as a high content of silica, at least that fused directly to the quartz part is practically free of oxides of the alkali metals.

Claims (1)

2. Vakuumröhre nach Anspruch 1, dadurch gekennzeichnet, dass die Zwisehengläser Aluminiumoxyd oder Kalziumoxyd oder diese beiden Oxyde gleichzeitig enthalten, u. zw. vorzugsweise in. vom Quarzteil an gerechnet, nahezu stetig steigender Menge. EMI2.2 2. Vacuum tube according to claim 1, characterized in that the Zwisehengläser contain aluminum oxide or calcium oxide or these two oxides at the same time, u. between preferably in. calculated from the quartz part, almost steadily increasing amount. EMI2.2
AT116277D 1927-05-21 1928-05-04 Vacuum tube. AT116277B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL116277X 1927-05-21

Publications (1)

Publication Number Publication Date
AT116277B true AT116277B (en) 1930-02-10

Family

ID=19775275

Family Applications (1)

Application Number Title Priority Date Filing Date
AT116277D AT116277B (en) 1927-05-21 1928-05-04 Vacuum tube.

Country Status (1)

Country Link
AT (1) AT116277B (en)

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