DE827098C - Electric discharge tubes with a capacitive ignition electrode - Google Patents

Electric discharge tubes with a capacitive ignition electrode

Info

Publication number
DE827098C
DE827098C DEN1946A DEN0001946A DE827098C DE 827098 C DE827098 C DE 827098C DE N1946 A DEN1946 A DE N1946A DE N0001946 A DEN0001946 A DE N0001946A DE 827098 C DE827098 C DE 827098C
Authority
DE
Germany
Prior art keywords
ignition electrode
glass
capacitive
capacitive ignition
electric discharge
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
DEN1946A
Other languages
German (de)
Inventor
Jozefus Antonius Maria Smelt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken 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 Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of DE827098C publication Critical patent/DE827098C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting
    • H01J61/545—Igniting arrangements, e.g. promoting ionisation for starting using an auxiliary electrode inside the vessel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0072—Disassembly or repair of discharge tubes
    • H01J2893/0073—Discharge tubes with liquid poolcathodes; constructional details
    • H01J2893/0074—Cathodic cups; Screens; Reflectors; Filters; Windows; Protection against mercury deposition; Returning condensed electrode material to the cathodic cup; Liquid electrode level control
    • H01J2893/0087—Igniting means; Cathode spot maintaining or extinguishing means

Landscapes

  • Glass Compositions (AREA)

Description

Die Erfindung bezieht sich auf eine elektrische Entladungsröhre mit einer kapazitiven Zündelektrode. Eine kapazitive Zündelektrode besteht aus eitlem Leiter, der durch eine Schicht aus Isoliermaterial von der flüssigen oder gegebenenfalls festen Kathode getrennt ist.The invention relates to an electrical discharge tube with a capacitive ignition electrode. A capacitive ignition electrode consists of a void conductor, which is covered by a layer of insulating material is separated from the liquid or optionally solid cathode.

Es ist bereits bekannt, für das Isoliermaterial kapazitiver Zünder Quarz zu verwenden, dies hat aber den Nachteil verhältnismäßig kurzer Lebensdauer. Glasarten, deren Zusammensetzung der des unter dem Handelsnamen Pyrex bekannten Glases annähernd entspricht, ergeben bei den meisten Schaltungen mit kapazitiven Zündelektroden eine Lebensdauer, die um ein Mehrfaches besser als die des Quarzes ist.It is already known to use quartz for the insulating material of capacitive detonators but the disadvantage of a relatively short lifespan. Types of glass, the composition of which corresponds to that of the almost corresponds to the glass known under the trade name Pyrex, result in most Circuits with capacitive ignition electrodes have a service life that is several times better than that of quartz is.

Bei einer elektrischen Entladungsröhre mit einer kapazitiven Zündelektrode besteht das Isoliermaterial der Zündelektrode gemäß der. Erfindung aus Glas mit einem Gehalt an Schwermetalloxyden von über 20% und einem Gehalt an Alkalioxyd zwischen 10 und 200/o, wobei das Alkalioxyd zu etwa 2 bis 6°/o vorzugsweise zu etwa 4%, in Form von Natriumoxyd vorhanden ist.In the case of an electrical discharge tube with a capacitive ignition electrode, the insulating material of the ignition electrode is made according to FIG. Invention is composed of glass having a content of Schwermetalloxyden of over 20% and a content of alkali oxide 10-20 0 / o, wherein the alkali oxide to about 2 to 6 / o is present °, preferably to about 4%, in the form of sodium oxide.

Untersuchungen, die zur Erfindung führten, haben gezeigt, daß diese Glasarten wesentlich bessere Lebensdauern sichern als die bekannten Glasarten. Der tg ό-Wert dieser Glasarten, deren dielektrische Verluste gering sind, liegt im allgemeinen zwischen 10 und 15 X ΐο~*. Daß solche Glasarten eine hohe Lebensdauer bei einer kapazi-Studies leading to the invention have shown that these types of glass are essential ensure better lifetimes than the known types of glass. The tg ό value of these types of glass, their dielectric losses are low, is generally between 10 and 15 X ΐο ~ *. That such Glass types have a long service life with a capacitive

Claims (2)

tiven Zündelektrode aufweisen wurden, liegt nicht auf der Hand, da im allgemeinen angenommen wird, daß die dielektrischen Verluste bei einer kapazitiven Zündelektrode nur geringen Einfluß auf die Lebensdauer ausüben und andere Eigenschaften, wie Widerstand gegen Angriff durch Ionenbombardement, die Hauptrolle spielen. Wahrscheinlich sind diese Glasarten in dieser Hinsicht besonders vorteilhaft. Eine besonders vorteilhafte Glasart ist die, deren Zusammensetzung annähernd 49,5VoSiO2, 3,3%> Xa2O, 36,7VoPbO1 8,4VoK2O, 2,2«/oCaO ist. 1 >er tg^-Wert dieses Glases beträgt etwa 7,7· io~4. Wird aus dem vorstehend angegebenen Glas eine kapazitive Zündelektrode hergestellt, die aus einem Chromeisenstift mit einem Durchmesser von 4 mm besteht, der mit einer Glasschicht von etwa 0,6 mm überzogen wird, so beträgt die Minimalzündspannung 3 bis 3,5 kV. Die Lebensdauer einer mit einem solchen Zünder versehenen Röhre beträgt mehrere tausend Stunden. PAT EXTAXS PR Ϊ CUE:tive ignition electrode were not obvious, since it is generally assumed that the dielectric losses in a capacitive ignition electrode have only a minor influence on the service life and other properties, such as resistance to attack by ion bombardment, play the main role. These types of glasses are likely to be particularly beneficial in this regard. A particularly advantageous type of glass is that whose composition is approximately 49.5VoSiO2, 3.3%> Xa2O, 36.7VoPbO1 8.4VoK2O, 2.2% / oCaO. 1> the tg ^ value of this glass is about 7.7 · io ~ 4. If a capacitive ignition electrode is made from the glass specified above, which consists of a chrome iron pin with a diameter of 4 mm, which is covered with a glass layer of about 0.6 mm, the minimum ignition voltage is 3 to 3.5 kV. The service life of a tube provided with such an igniter is several thousand hours. PAT EXTAXS PR Ϊ CUE: 1. Elektrische Entladungsröhre mit einer kapazitiven Zündelektrode, dadurch gekennzeichnet, daß das Isoliermaterial der Zündelektrode aus einem Glas mit einem Gehalt an Schwermetalloxyden von über 20% und einem Gehalt an Alkalioxyd zAvischen 10 und 20°/o besteht, wobei das Alkalioxyd zu etwa 2 bis 6°/o, vorzugsweise zu etwa 4% in Form von Natriumoxyd vorhanden ist.1. Electrical discharge tube with a capacitive ignition electrode, characterized in that that the insulating material of the ignition electrode consists of a glass with a content of Heavy metal oxides of more than 20% and an alkali oxide content of 10 and 20% consists, wherein the alkali oxide to about 2 to 6%, preferably to about 4% in the form of sodium oxide is present. 2. Elektrische Entladungsröhre nach Anspruch i. dadurch gekennzeichnet, daß das Glas der Zündelektrode annähernd folgende Zusammensetzung hat: 49ö°/o SiO2, 3,3% Na2O, 36,7VoPbO, 8,4VnK2O, 2,2% CaO. · 2. Electric discharge tube according to claim i. characterized in that the glass of the ignition electrode has approximately the following composition: 496 % SiO 2 , 3.3% Na 2 O, 36.7 VoPbO, 8.4 VnK 2 O, 2.2% CaO. · 2652 12.2652 12.
DEN1946A 1949-09-24 1950-09-21 Electric discharge tubes with a capacitive ignition electrode Expired DE827098C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL1024842X 1949-09-24

Publications (1)

Publication Number Publication Date
DE827098C true DE827098C (en) 1952-01-07

Family

ID=19867234

Family Applications (1)

Application Number Title Priority Date Filing Date
DEN1946A Expired DE827098C (en) 1949-09-24 1950-09-21 Electric discharge tubes with a capacitive ignition electrode

Country Status (3)

Country Link
BE (1) BE498280A (en)
DE (1) DE827098C (en)
FR (1) FR1024842A (en)

Also Published As

Publication number Publication date
FR1024842A (en) 1953-04-07
BE498280A (en)

Similar Documents

Publication Publication Date Title
DE60033799T2 (en) WOLFRAM SEAL GLASS
DE19755005A1 (en) Lead-free lamp glass composition
DE827098C (en) Electric discharge tubes with a capacitive ignition electrode
DE636651C (en) Electric light tubes with alkali metal vapor filling
DE19701095A1 (en) Glass composition used for electric lamp bulbs
DE1953891C3 (en) High temperature! Est putty material
EP0124943A1 (en) Dielectric glass for multilayered circuits, and thick-film circuits using it
DE844647C (en) Lead-free glasses
DE3046594A1 (en) LAMP WITH A GLASS LAMP PISTON AND GLASS SUITABLE FOR THIS PISTON
DE639465C (en) Electric discharge lamp with alkali vapor filling and with a glass cover made of borosilicate glass
AT145468B (en) Electric tube with alkali metal vapor filling.
DE1596730A1 (en) Borate-rich glasses
DE1041658B (en) Glass containing silica, alumina, alkaline earth oxides and alkali oxides
CH289524A (en) Electric discharge tube with a capacitive ignition electrode.
DE648503C (en) Electric discharge lamp with cadmium vapor filling
DE841623C (en) Special glass with a low expansion coefficient
DE19547567C2 (en) Transparent glass composition and use
DE475135C (en) Electrical insulation made of glass
DE655233C (en) Electric high-pressure mercury vapor discharge tubes with glow electrode (s), especially for emitting rays
DE724431C (en) Electric alkali, in particular sodium vapor discharge lamp with one or more glow electrodes containing alkaline earth metal
AT156720B (en) Glow electrode for electric discharge tubes.
DE598325C (en) Electric mercury vapor lamp or tube with a tube made of borosilicate glass
DE647536C (en) Electric light tubes with sodium, potassium or magnesium vapor filling, the vessel of which consists of a borosilicate glass
AT150583B (en) Electric tube.
AT139622B (en) Electric mercury vapor lamp or tube.