AT149751B - Device for protecting X-ray tubes against overload. - Google Patents

Device for protecting X-ray tubes against overload.

Info

Publication number
AT149751B
AT149751B AT149751DA AT149751B AT 149751 B AT149751 B AT 149751B AT 149751D A AT149751D A AT 149751DA AT 149751 B AT149751 B AT 149751B
Authority
AT
Austria
Prior art keywords
protecting
ray tubes
against overload
tubes against
tube
Prior art date
Application number
Other languages
German (de)
Inventor
Kurt Dipl Ing Bischoff
Original Assignee
Siemens Reiniger Werke Ag
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 Siemens Reiniger Werke Ag filed Critical Siemens Reiniger Werke Ag
Application granted granted Critical
Publication of AT149751B publication Critical patent/AT149751B/en

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  • X-Ray Techniques (AREA)

Description

  

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  Einrichtung zum Schutz von Röntgenröhren gegen Überlastung. 
 EMI1.1 
 

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Entsprechend sind die bei Einschaltung der Regelvorrichtungen   h2   und h3 der Röntgenröhre a zugeführten konstanten Leistungen gleich den bei 5 und 10 Sekunden Belichtungszeit maximal zu- lässigen Leistungen. Der Umschalter i ist mit einem beweglichen Anschlag   n   des   Zeitschalters   p derart   gekuppelt, dass die Belichtungszeit lediglich bis zu dem durch die Stellung des Anschlages n bestimmten Grenzwert frei eingestellt werden kann, so dass eine Überschreitung der bei der betreffenden Stellung   des Umschalters i maximal zulässigen Belichtungszeit unmöglich gemacht ist. 



   Für die Wirkungsweise der Einrichtung ist wesentlich, dass die Netzspannung unverändert bleibt. 



   Etwaige Netzspannungsschwankungen werden deshalb in an sich bekannter Weise mittels der Regel- vorrichtung q und des Spannungsmessers ausgeglichen. 



     PATENT-ANSPRÜCHE   : 1. Einrichtung zum Schutz von Röntgenröhren gegen Überlastung, bei der die Regelvorrichtung für die Röhrenspannung mit der Regelvorrichtung für die Röhrenstromstärke derart mechanisch oder elektrisch gekuppelt ist, dass bei jeder Regelstellung der Röntgenröhre dieselbe Röhrenleistung zu- geführt wird, dadurch gekennzeichnet, dass mehrere Regelvorrichtungen für die Röhrenstromstärke vorgesehen sind, die für verschiedene Bereiche der Belichtungszeit abwechselnd in den Stromkreis einschaltbar sind.



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  Device for protecting X-ray tubes against overload.
 EMI1.1
 

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Correspondingly, the constant powers supplied to the x-ray tube a when the control devices h2 and h3 are switched on are equal to the maximum permissible powers for 5 and 10 seconds of exposure time. The switch i is coupled to a movable stop n of the timer p in such a way that the exposure time can only be freely set up to the limit value determined by the position of the stop n, so that the maximum permissible exposure time for the relevant position of the switch i is exceeded is made impossible.



   It is essential for the operation of the device that the mains voltage remains unchanged.



   Any mains voltage fluctuations are therefore compensated in a manner known per se by means of the regulating device q and the voltmeter.



     PATENT CLAIMS: 1. Device for protecting X-ray tubes against overload, in which the regulating device for the tube voltage is mechanically or electrically coupled to the regulating device for the tube amperage in such a way that the same tube power is supplied to the X-ray tube in every regulating position, characterized in that, that several regulating devices for the tube current intensity are provided, which can be switched into the circuit alternately for different ranges of the exposure time.

Claims (1)

2. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Umschalter, der die ver- schiedenen Regelvorrichtungen für die Röhrenstromstärke in den Stromkreis einschaltet, mit einer am Zeitschalter angebrachten Vorrichtung zur Begrenzung der Einstellung der Belichtungszeit derart mechanisch oder elektrisch gekuppelt ist, dass eine Überschreitung der maximal zulässigen Röhren- belastung unmöglich gemacht ist. EMI2.1 2. Device according to claim 1, characterized in that the changeover switch which switches on the various regulating devices for the tube current intensity in the circuit is mechanically or electrically coupled to a device attached to the timer to limit the setting of the exposure time in such a way that it is exceeded the maximum permissible tube load is made impossible. EMI2.1
AT149751D 1935-05-09 1936-04-14 Device for protecting X-ray tubes against overload. AT149751B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE149751X 1935-05-09

Publications (1)

Publication Number Publication Date
AT149751B true AT149751B (en) 1937-05-25

Family

ID=29260957

Family Applications (1)

Application Number Title Priority Date Filing Date
AT149751D AT149751B (en) 1935-05-09 1936-04-14 Device for protecting X-ray tubes against overload.

Country Status (1)

Country Link
AT (1) AT149751B (en)

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