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DE612049C - Pseudo vacuum switch - Google Patents

Pseudo vacuum switch

Info

Publication number
DE612049C
DE612049C DES93398D DES0093398D DE612049C DE 612049 C DE612049 C DE 612049C DE S93398 D DES93398 D DE S93398D DE S0093398 D DES0093398 D DE S0093398D DE 612049 C DE612049 C DE 612049C
Authority
DE
Germany
Prior art keywords
electrodes
auxiliary
switch
voltage source
vacuum switch
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
DES93398D
Other languages
German (de)
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.)
VEM Sachsenwerk GmbH
Original Assignee
Sachsenwerk Licht und Kraft AG
Publication date
Priority to DES93398D priority Critical patent/DE612049C/en
Application granted granted Critical
Publication of DE612049C publication Critical patent/DE612049C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/38—Cold-cathode tubes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0064—Tubes with cold main electrodes (including cold cathodes)
    • H01J2893/0065—Electrode systems

Landscapes

  • X-Ray Techniques (AREA)

Description

Es ist bekannt, daß ein gasgefülltes Entladungsrohr, z. B. ein Wehnelt-Hochspannungsgleichrichter, durch elektrostatische negative Aufladungen der Rohrwände in der Umgebung der Anode bei praktisch gleichbleibendem Innendruck so verändert werden kann, daß die Entladung aussetzt bzw. daß gegenüber der zur Verfugung stehenden Spannung ein höheres Vakuum vorgetäuscht wird, als in Wirklichkeit vorhanden ist (Pseudohochvakuum). It is known that a gas-filled discharge tube, z. B. a Wehnelt high-voltage rectifier, by electrostatic negative charges on the pipe walls in the area the anode can be changed with practically constant internal pressure so that the discharge ceases or that a higher vacuum is simulated compared to the voltage available, than actually exists (pseudo high vacuum).

Es ist des weiteren bekannt, daß man durch künstlich herbeigeführte positive, die Kathode abschirmende elektrostatische Aufladungen den Härtegrad von Röntgenröhren so verändern kann, daß nicht nur die Betriebsspannung, sondern auch bedeutend, höhere an das Rohr gelegte Spannungen keinen Stromdurchgang mehr auslösen. Dieses Sperren des Stromdurchgangs kann sowohl bei entgasten als auch bei nicht entgasten Elektroden vorgenommen werden.It is also known that artificially created positive, the cathode shielding electrostatic charges change the hardness of X-ray tubes can that not only the operating voltage, but also significantly higher voltages placed on the pipe no longer trigger the continuity of current. This locking of the The passage of current can be carried out with both degassed and non-degassed electrodes will.

Die Erfindung bezieht sich darauf, ein solches Pseudo-Hochvakuum zu verwenden, um die Zündung bzw. Wiederzündung eines Lichtbogens in einem gasgefüllten Entladungsgefäß zu verhindern, dessen Elektroden in ihrer Lage zueinander derart verändert werden, daß sie in bekannter Weise als Schalter wirken. Erfindungsgemäß werden in für Röntgenröhren zur Steuerung des Pseudo-Vakuums bekannter Weise in der Umgebung der Elektroden Hilfselektroden so angeordnet und an eine solche geeignete Spannungsquelle gelegt, daß sie nach Aufhebung des gegenseitigen Kontaktes der Hauptelektroden die Erscheinung des Pseudo-Hochvakuums hervorrufen und dementsprechend den Entladevorgang zwischen den beiden Hauptelektroden unterbrechen. Als Spannungsquelle für die Hilfselektroden kann entweder der Hauptstromkreis selbst oder eine fremde Hilfsspannung dienen.The invention relates to using such a pseudo high vacuum to the ignition or re-ignition of an arc in a gas-filled discharge vessel to prevent the position of the electrodes from being changed in such a way that they act in a known manner as a switch. According to the invention in for X-ray tubes for controlling the pseudo-vacuum in a known manner in the vicinity of the Electrodes Auxiliary electrodes are arranged and connected to such a suitable voltage source, that after the mutual contact of the main electrodes has been removed, the phenomenon of the pseudo high vacuum and, accordingly, the discharge process between the two main electrodes interrupt. Either the main circuit can be used as the voltage source for the auxiliary electrodes serve themselves or an external auxiliary voltage.

Die Abbildung zeigt eine schematische beispielsweise Darstellung einer Röhre nach dem Erfindungsgedanken. Es bedeuten: a die Röhre;, b und / die Zuführungen einer Spannungsquelle, c die feste und e die bewegliche Hauptelektrode, d die Hilfselektroden.The figure shows a schematic, for example, representation of a tube according to the concept of the invention. It denotes: a the tube; b and / the leads of a voltage source, c the fixed and e the movable main electrode, d the auxiliary electrodes.

Claims (3)

50 Patentansprüche: 50 claims: i. Schalter für höhere Spannungen in Form einer gasgefüllten Entladungsröhre mit gegeneinander verstellbaren Elektroden, dadurch gekennzeichnet, daß in der Nähe der Elektroden 'eine oder mehrere. Hilfselektroden derart vorgesehen und an eine solche geeignete Spannungsquelle angelegt sind, daß sie nach Aufhebung des gegenseitigen Kontaktes der Hauptelektroden ein Pseudo-Hochvakuum hervorrufen und damit Entladungen unterdrücken und das Abschalten der vom Schalter geführten elektrischen Leistung herbeiführen. i. Switch for higher voltages in the form of a gas-filled discharge tube with mutually adjustable electrodes, characterized in that in the Near the electrodes' one or more. Auxiliary electrodes are provided and attached in this way such a suitable voltage source are applied that they are after the mutual contact of the main electrodes create a pseudo high vacuum and thus suppress discharges and cause the electrical power carried by the switch to be switched off. 2. Schalter nach Anspruch 1, dadurch gekennzeichnet, daß die Hilfselektroden an eine dem Hauptstromkreis fremde Hilfsspannung gelegt sind.2. Switch according to claim 1, characterized in that the auxiliary electrodes are connected to an auxiliary voltage that is external to the main circuit. 3. Schalter nach Anspruch 1, dadurch gekennzeichnet, daß der Hauptstromkreis selbst direkt oder indirekt als Spannungsquelle für' die Hilfselektroden dient. 3. Switch according to claim 1, characterized in that the main circuit itself directly or indirectly as a voltage source for 'the auxiliary electrodes. Hierzu 1 Blatt Zeichnungen1 sheet of drawings
DES93398D Pseudo vacuum switch Expired DE612049C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES93398D DE612049C (en) Pseudo vacuum switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES93398D DE612049C (en) Pseudo vacuum switch

Publications (1)

Publication Number Publication Date
DE612049C true DE612049C (en) 1935-04-12

Family

ID=7517953

Family Applications (1)

Application Number Title Priority Date Filing Date
DES93398D Expired DE612049C (en) Pseudo vacuum switch

Country Status (1)

Country Link
DE (1) DE612049C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2487437A (en) * 1943-11-23 1949-11-08 Canadian Radium & Uranium Corp Cold cathode gaseous discharge tube
DE921461C (en) * 1939-10-12 1954-12-20 Siemens Ag Circuit breaker
DE1024143B (en) * 1954-04-30 1958-02-13 Siemens Ag Arrangement for switching off a direct current circuit
DE4218479A1 (en) * 1992-06-04 1993-12-09 Siemens Ag Low-pressure gas-discharge switch - places auxiliary electrode around discharge gap and connects to intermediate voltage source for radially directing field to housing wall.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE921461C (en) * 1939-10-12 1954-12-20 Siemens Ag Circuit breaker
US2487437A (en) * 1943-11-23 1949-11-08 Canadian Radium & Uranium Corp Cold cathode gaseous discharge tube
DE1024143B (en) * 1954-04-30 1958-02-13 Siemens Ag Arrangement for switching off a direct current circuit
DE4218479A1 (en) * 1992-06-04 1993-12-09 Siemens Ag Low-pressure gas-discharge switch - places auxiliary electrode around discharge gap and connects to intermediate voltage source for radially directing field to housing wall.

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