DE1081973B - Portable lamp with a gas discharge lamp - Google Patents

Portable lamp with a gas discharge lamp

Info

Publication number
DE1081973B
DE1081973B DEV12399A DEV0012399A DE1081973B DE 1081973 B DE1081973 B DE 1081973B DE V12399 A DEV12399 A DE V12399A DE V0012399 A DEV0012399 A DE V0012399A DE 1081973 B DE1081973 B DE 1081973B
Authority
DE
Germany
Prior art keywords
transistor
capacitor
resistor
lamp
base
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.)
Pending
Application number
DEV12399A
Other languages
German (de)
Inventor
Dr Phil Habil Oskar Vierling
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.)
Individual
Original Assignee
Individual
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
Priority to DEV10920A priority Critical patent/DE1053102B/en
Priority to DEV11167A priority patent/DE1079199B/en
Application filed by Individual filed Critical Individual
Priority to DEV12399A priority patent/DE1081973B/en
Publication of DE1081973B publication Critical patent/DE1081973B/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
    • H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
    • H05B41/2821—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a single-switch converter or a parallel push-pull converter in the final stage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/338—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5383—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a self-oscillating arrangement

Description

DEUTSCHESGERMAN

Die Erfindung betrifft eine tragbare Leuchte mit einer Gasentladungslampe, einer Batterie geringer Spannung als Stromquelle, einem Transistor-Schwingungserzeuger mit einer weit über der üblichen Netzfrequenz liegenden Schwingfrequenz, der derart intermittierend zum An- und Abschwingen gebracht wird, daß das Zeitintervall zwischen zwei Impulsfolgen groß gegen die Dauer einer Impulsfolge ist, sowie mit wenigstens einem Transformator, an dessen Oberspannungswicklung die Gasentladungslampe angeschlossen ist, gemäß Patent 1 053 102, wobei die Frequenz des An- und Abschwingens des Schwingerzeugers durch ein in der Schwingschaltung vorgesehenes i?C-Glied gesteuert wird.The invention relates to a portable lamp with a gas discharge lamp, a battery less Voltage as a current source, a transistor oscillator with a frequency well above the usual mains frequency lying oscillation frequency, which is made to oscillate intermittently in this way becomes that the time interval between two pulse trains is large compared to the duration of a pulse train, and with at least one transformer to whose high-voltage winding the gas discharge lamp is connected is, according to patent 1,053,102, wherein the frequency of the oscillation on and off of the oscillator is controlled by an i? C element provided in the oscillating circuit.

Die intermittierende Betriebsweise der schwingungserzeugenden Transistoranordnung gemäß dem Hauptpatent, die sowohl bei der Erzeugung von Dauer- als auch von Blinklicht anwendbar ist, bringt gegenüber einer gewöhnlichen Sperrschwinger- oder Zerhackerarbeitsweise mit ununterbrochenem Arbeiten des Unterbrechers den überraschenden Vorteil, daß eine höhere Lichtausbeute bzw. eine bessere Ausnutzung der Batteriekapazität erzielt wird.The intermittent operation of the oscillation-generating transistor arrangement according to the Main patent, which is applicable to both the generation of continuous and flashing light, brings compared to a common blocking vibrator or chopper mode of operation with uninterrupted work the interrupter has the surprising advantage that a higher light output or better utilization the battery capacity is achieved.

Um nun in derartigen Schwingschaltungen die Frequenz des zur Speisung der Gasentladungslampe dienenden Transistor-Schwingungserzeugers entsprechend den gewünschten Verhältnissen einstellen zu können, hat man bereits in der Basisleitung des Transistors ein aus der Parallelschaltung eines Widerstandes und eines Kondensators bestehendes i?C-Glied vorgesehen, das die Frequenz des An- und Abschwingens des Schwingungserzeugers bestimmt.In order to now determine the frequency of the voltage used to feed the gas discharge lamp in such oscillating circuits To be able to adjust the transistor vibration generator according to the desired conditions, one already has in the base line of the transistor one from the parallel connection of a resistor and a capacitor existing i? C element provided that the frequency of the swinging up and down of the Vibration generator determined.

Der Erfindung liegt die Aufgabe zugrunde, eine neue Schaltung der eingangs genannten Art zur Erzeugung intermittierender Schwingungen zu entwickeln, die sich gegenüber den bekannten Anordnungen durch eine leichtere Einstellbarkeit der Frequenz des Schwingungserzeugers und eine besonders gute Schonung der Batterie auszeichnet. Die neue Schaltung soll darüber hinaus so ausgebildet sein, daß sie sich leicht zu einer zweistufigen Transistor-Schwinganordnung erweitern läßt.The invention is based on the object of producing a new circuit of the type mentioned at the beginning develop intermittent vibrations, which are different from the known arrangements by an easier adjustability of the frequency of the vibration generator and a special one good protection of the battery. The new circuit should also be designed so that it can easily be expanded into a two-stage transistor oscillating arrangement.

Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß das als Reihenschaltung eines Widerstandes und eines Kondensators ausgebildete J?C-Glied parallel zur Batterie geschaltet ist und der Punkt zwischen Widerstand und Kondensator galvanisch mit der Basis des Transistors verbunden ist.This object is achieved according to the invention in that the series connection of a resistor and a capacitor formed J? C element is connected in parallel with the battery and the point between resistor and capacitor is galvanically connected to the base of the transistor.

Wie Versuche ergeben haben, läßt sich durch Veränderung des Widerstandes die Frequenz- des An- und Abschwingens des Schwingungserzeugers in einfacher Weise und unter größtmöglicher Schonung der Batteriekapazität regeln.As tests have shown, by changing the resistance, the frequency of the and swinging down of the vibration generator in a simple manner and with the greatest possible care regulate the battery capacity.

Als besonders günstig hat sich eine Ausführungs-Tragbare Leuchte mit einer GasentladungslampeA portable light with a gas discharge lamp has proven to be particularly favorable

Zusatz zum Patent 1 053 102Addendum to patent 1,053,102

Anmelder:Applicant:

Dr. phil. habil. Oskar Vierling, Ebermannstadt (OFr.), Pretzfeider Str. 23Dr. phil. habil. Oskar Vierling, Ebermannstadt (O.r.), Pretzfeider Str. 23

Dr. phil. habil. Oskar Vierling, Ebermannstadt (OFr.), ist als Erfinder genannt wordenDr. phil. habil. Oskar Vierling, Ebermannstadt (OFr.), Has been named as the inventor

form der erfindungsgemäßen Schaltung erwiesen, bei der der Kondensator des i?C-Gliedes parallel zur Emitter-Basis-Strecke und der regelbar ausgebildete Widerstand des i?C-Gliedes parallel zur Kollektor-Basis-Strecke des Transistors geschaltet ist.form of the circuit according to the invention, in which the capacitor of the i? C element parallel to the Emitter-base path and the adjustable resistance of the i? C element parallel to the collector-base path of the transistor is switched.

Eine Leuchte nach der Erfindung mit einem zweistufigen Transistor-Schwingungserzeuger, bei dem in der Kollektorleitung des Transistors der ersten Stufe die Primärwicklung eines Transformators liegt, dessen Sekundärwicklung zwischen die Basis dieses Transistors und den Punkt zwischen Widerstand und Kondensator des i?C-Gliedes geschaltet ist, läßt sich vorteilhaft in der Weise ausbilden, daß zwischen den mit dem Pluspol der Batterie verbundenen Anschluß des Kondensators des i?C-Gliedes und den Emitter des Transistors der ersten Stufe ein Widerstand eingeschaltet ist, an dessen Klemmen die Emitter-Basis-Strecke des Ausgangstransistors angeschlossen ist.A lamp according to the invention with a two-stage transistor vibration generator, in which in the collector line of the transistor of the first stage is the primary winding of a transformer whose Secondary winding between the base of this transistor and the point between the resistor and capacitor of the i? C element is connected, can be advantageous train in such a way that between the terminal connected to the positive terminal of the battery The capacitor of the i? C element and the emitter of the transistor of the first stage have a resistor switched on is, to whose terminals the emitter-base path of the output transistor is connected.

In der Zeichnung ist die Erfindung an Hand von zwei Aüsführungsbeispielen im einzelnen näher veranschaulicht. Es zeigenIn the drawing, the invention is illustrated in more detail on the basis of two exemplary embodiments. Show it

Fig. 1 und 2 je eine Schaltung der erfindungsgemäßen Transistor-Schwingungsanordnung zur Erzeugung intermittierender Schwingfrequenzen.1 and 2 each show a circuit of the transistor oscillation arrangement according to the invention for generating intermittent vibration frequencies.

In Fig. 1 ist die erfindungsgemäße Grundschaltung dargestellt. Als Flächentransistor 3, dessen Verlustleistung von der angestrebten Lichtausbeute abhängt, wird vorteilhaft eine Type verwendet, deren Emitter-Kollektor-Strecke besonders niederohmig werden kann. Die Basis und der Kollektor des Transistors 3In Fig. 1, the basic circuit according to the invention is shown. As a flat transistor 3, its power loss depends on the desired light yield, a type is advantageously used whose emitter-collector path can be particularly low resistance. The base and collector of transistor 3

009 510/164009 510/164

sind mit je einer Wicklung des Transformators 4 verbunden, der außerdem die an die Pole 5 geführte Ausgangswicklung trägt, an die die (nicht dargestellte) Gasentladungslampe angeschlossen ist.are each connected to one winding of the transformer 4, which is also connected to the poles 5 Carries output winding to which the gas discharge lamp (not shown) is connected.

Parallel zur Emitter-Kollektor-Strecke des Transistors 3 ist ein aus dem Kondensator 7 und dem regelbaren Widerstand 8 bestehendes i?C-Glied geschaltet, das unmittelbar an die Klemmen der Batterie 6 angeschlossen ist und dessen Verbindungspunkt zwischen dem Kondensator 7 und dem Widerstand 8 über eine Wicklung des Transformators 4 an die Basis des Transistors 3 angeschlossen ist.In parallel with the emitter-collector path of the transistor 3 is one of the capacitor 7 and the adjustable resistor 8 existing i? C element switched, which is directly connected to the terminals of the battery 6 and its connection point between the capacitor 7 and the resistor 8 via a winding of the transformer 4 to the base of transistor 3 is connected.

Beim Betrieb dieser Schwingungsanordnung treten an den Anschlußklemmen 5 unterbrochene Wellenzüge auf, wobei sich die Dauer der Unterbrechung im wesentlichen durch den Widerstand 8, die Länge der Wellenzüge praktisch durch den Kondensator 7 einstellen läßt. Mit einem Kondensator von 2000 μΈ und einem Widerstand von 1 kß erhält man beispielsweise in Abständen von einer Sekunde jeweils einen Lichtblitz von 10 ms Dauer. Im einzelnen hängen diese Werte selbstverständlich auch von der Batteriespannung und den Daten des Transistors 3 sowie den Daten des Transformators 4 ab.During operation of this oscillating arrangement, interrupted wave trains occur at the terminals 5, the duration of the interruption being essentially adjustable by the resistor 8 and the length of the wave trains being practically adjustable by the capacitor 7. With a capacitor of 2000 μΈ and a resistance of 1 kΩ, for example, a flash of light lasting 10 ms is obtained at intervals of one second. In detail, these values naturally also depend on the battery voltage and the data of the transistor 3 as well as the data of the transformer 4.

In Fig. 2 ist eine Schaltung für hohe Lichtausbeute dargestellt, bei der ein zweistufiger Transistor-Schwingungserzeuger Verwendung findet. In der Kollektorleitung des Transistors 3 liegt die Primärwicklung des Transistors 4, dessen Sekundärwicklung zwischen die Basis des Transistors 3 und den Verbindungspunkt zwischen dem Kondensator 7 und dem Widerstand 8 des i?C-Gliedes geschaltet ist.In Fig. 2 a circuit for high light yield is shown in which a two-stage transistor oscillator is used. In the collector line of the transistor 3 is the primary winding of the transistor 4, the secondary winding of which is connected between the base of the transistor 3 and the connection point between the capacitor 7 and the resistor 8 of the IC element.

Zwischen den mit dem Pluspol der Batterie 6 verbundenen Anschluß des Kondensators 7 und den Emitter des Transistors 3 der ersten Stufe der zweistufigen Schwingungsanordnung ist ein Widerstand 9 eingeschaltet, an dessen Klemmen die Emitter-Basis-Strecke des Leitungstransistors 10 angeschlossen ist. Zwischen dem Kollektor des Ausgangstransistors 10 und dem negativen Batteriepol liegt die Primärwicklung des Ausgangstransformators 11, dessen Sekundärwicklung mit den Ausgangsklemmen 12 verbunden ist. Der Transformator 11 kann gegebenenfalls bis ins Sättigungsgebiet ausgesteuert werden, so daß an den Anschlüssen 12 eine hohe Ausgangsspannung erzielt wird.Between the terminal of the capacitor 7 connected to the positive terminal of the battery 6 and the The emitter of the transistor 3 of the first stage of the two-stage oscillation arrangement is a resistor 9 switched on, to the terminals of which the emitter-base path of the line transistor 10 is connected. The primary winding is located between the collector of the output transistor 10 and the negative battery pole of the output transformer 11, the secondary winding of which is connected to the output terminals 12 is. The transformer 11 can optionally be controlled into the saturation area, so that to the Connections 12 a high output voltage is achieved.

Claims (3)

PATENTANS PBCCHE:PATENTANS PBCCHE: 1. Tragbare Leuchte mit einer Gasentladungslampe, einer Batterie geringer Spannung als Stromquelle, einem Transistor-Schwingungserzeuger mit einer weit über der üblichen Netzfrequenz liegenden Schwingfrequenz, der derart intermittierend zum An- und Abschwingen gebracht wird, daß das Zeitintervall zwischen zwei Impulsfolgen groß gegen die Dauer einer Impulsfolge ist, sowie mit wenigstens einem Transformator, an dessen Oberspannungswicklung die Gasentladungslampe angeschlossen ist, gemäß Patent 1 053 102, wobei die Frequenz des An- und Abschwingens des Schwingerzeugers durch ein in der Schwingschaltung vorgesehenes RC-Glieä gesteuert wird, dadurch gekennzeichnet, daß das als Reihenschaltung eines Widerstandes (8) und eines Kondensators (7) ausgebildete i?C-Glied parallel zur Batterie (6) geschaltet ist und der Punkt zwischen Widerstand und Kondensator galvanisch mit der Basis des Transistors (3) verbunden ist.1. Portable lamp with a gas discharge lamp, a low voltage battery as a power source, a transistor oscillator with an oscillation frequency well above the usual mains frequency, which is made to oscillate intermittently in such a way that the time interval between two pulse trains is large compared to the duration is a pulse train, as well as with at least one transformer, to whose high-voltage winding the gas discharge lamp is connected, according to patent 1,053,102, the frequency of the oscillation on and off of the oscillator being controlled by an RC element provided in the oscillating circuit, characterized in that the i? C element formed as a series connection of a resistor (8) and a capacitor (7) is connected in parallel to the battery (6) and the point between the resistor and the capacitor is galvanically connected to the base of the transistor (3). 2. Leuchte nach Anspruch 1, dadurch gekennzeichnet, daß der Kondensator (7) des i?C-Gliedes parallel zur Emitter-Basis-Strecke und der regelbar ausgebildete Widerstand (8) des i?C-Gliedes parallel zur Kollektor-Basis-Strecke des Transistors (3) geschaltet ist.2. Lamp according to claim 1, characterized in that the capacitor (7) of the i? C element parallel to the emitter-base path and the adjustable resistor (8) of the i? C element is connected in parallel to the collector-base path of the transistor (3). 3. Leuchte nach den Ansprüchen 1 und 2 mit einem zweistufigen Transistor-Schwingungserzeuger, bei dem in der Kollektorleitung des Transistors der ersten Stufe die Primärwicklung eines Transformators liegt, dessen Sekundärwicklung zwischen die Basis dieses Transistors und den Punkt zwischen Widerstand und Kondensator des i?C-Gliedes geschaltet ist, dadurch gekennzeichnet, daß zwischen den mit dem Pluspol der Batterie (6) verbundenen Anschluß des Kondensators (7) des 2?C-Gliedes und den Emitter des Transistors (3) der ersten Stufe ein Widerstand (9) eingeschaltet ist, an dessen Klemmen die Emitter-Basis-Strecke des Ausgangstransistors (10) angeschlossen ist.3. Light according to claims 1 and 2 with a two-stage transistor vibration generator, in which in the collector line of the transistor of the first stage the primary winding of a The transformer has its secondary winding between the base of this transistor and the Point is connected between resistor and capacitor of the i? C element, characterized in that that between the terminal of the capacitor (7) connected to the positive pole of the battery (6) of the 2? C element and the emitter of the transistor (3) of the first stage, a resistor (9) is switched on is, to whose terminals the emitter-base path of the output transistor (10) is connected is. In Betracht gezogene Druckschriften:
Französische Patentschrift Nr. 1 123 405.Considered publications:
French patent specification No. 1 123 405. Hierzu 1 Blatt Zeichnungen1 sheet of drawings ® 009 510/164 5.60® 009 510/164 5.60
DEV12399A 1956-07-14 1957-05-09 Portable lamp with a gas discharge lamp Pending DE1081973B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DEV10920A DE1053102B (en) 1956-07-14 1956-07-14 Portable lamp with a gas discharge lamp and a low voltage battery as a power source
DEV11167A DE1079199B (en) 1956-07-14 1956-09-05 Portable lamp with a gas discharge lamp
DEV12399A DE1081973B (en) 1956-07-14 1957-05-09 Portable lamp with a gas discharge lamp

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DEV10920A DE1053102B (en) 1956-07-14 1956-07-14 Portable lamp with a gas discharge lamp and a low voltage battery as a power source
DEV11167A DE1079199B (en) 1956-07-14 1956-09-05 Portable lamp with a gas discharge lamp
DEV12399A DE1081973B (en) 1956-07-14 1957-05-09 Portable lamp with a gas discharge lamp

Publications (1)

Publication Number Publication Date
DE1081973B true DE1081973B (en) 1960-05-19

Family

ID=62596997

Family Applications (3)

Application Number Title Priority Date Filing Date
DEV10920A Pending DE1053102B (en) 1956-07-14 1956-07-14 Portable lamp with a gas discharge lamp and a low voltage battery as a power source
DEV11167A Pending DE1079199B (en) 1956-07-14 1956-09-05 Portable lamp with a gas discharge lamp
DEV12399A Pending DE1081973B (en) 1956-07-14 1957-05-09 Portable lamp with a gas discharge lamp

Family Applications Before (2)

Application Number Title Priority Date Filing Date
DEV10920A Pending DE1053102B (en) 1956-07-14 1956-07-14 Portable lamp with a gas discharge lamp and a low voltage battery as a power source
DEV11167A Pending DE1079199B (en) 1956-07-14 1956-09-05 Portable lamp with a gas discharge lamp

Country Status (1)

Country Link
DE (3) DE1053102B (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1123405A (en) * 1955-03-11 1956-09-21 Csf Power supply device for fluorescent tubes

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE633793C (en) * 1936-08-06 Dominitwerke Akt Ges Grubenlam Electric hand lamp, especially mine safety lamp with a gas discharge tube serving as a light source
US1936005A (en) * 1928-10-26 1933-11-21 Bay Zoltan Method of and device for operating luminous tubes
GB699478A (en) * 1950-06-14 1953-11-11 Dominitwerke Gmbh Mine lamp with fluorescent tube
DE913936C (en) * 1951-11-25 1954-06-21 Dr Heinz Mueller Light tube system, consisting of a battery, a high voltage generator and a light tube
AT185405B (en) * 1953-07-22 1956-04-25 Philips Nv Trigger circuit provided with a boundary layer transistor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1123405A (en) * 1955-03-11 1956-09-21 Csf Power supply device for fluorescent tubes

Also Published As

Publication number Publication date
DE1079199B (en) 1960-04-07
DE1053102B (en) 1959-03-19

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