EP0432624B1 - Main-standby filament switch for AC driven two-filament lamps in traffic signalling devices - Google Patents

Main-standby filament switch for AC driven two-filament lamps in traffic signalling devices Download PDF

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Publication number
EP0432624B1
EP0432624B1 EP90123330A EP90123330A EP0432624B1 EP 0432624 B1 EP0432624 B1 EP 0432624B1 EP 90123330 A EP90123330 A EP 90123330A EP 90123330 A EP90123330 A EP 90123330A EP 0432624 B1 EP0432624 B1 EP 0432624B1
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EP
European Patent Office
Prior art keywords
main
filament
switch
alternating current
change
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Expired - Lifetime
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EP90123330A
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German (de)
French (fr)
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EP0432624A1 (en
Inventor
Hellmuth Fricke
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Siemens AG
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Siemens AG
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    • 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
    • H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
    • H05B39/10—Circuits providing for substitution of the light source in case of its failure

Definitions

  • the invention relates to a main / secondary thread switch according to the preamble of claim 1.
  • a main / secondary thread switch is known from DE-PS 11 81 792.
  • the signal lamps used are regularly designed as double-filament lamps, of which one lamp thread, the so-called main thread, is usually switched on and off during operation. If the main thread burns out, the associated secondary thread is automatically switched on by a main thread monitor assigned to the relevant signal lamp, which then takes over the function of the defective main thread.
  • the main thread monitors are usually designed as current indicators, preferably relays, which are switched into the main thread circuit and which, with the switching means controlled by them, usually relay contacts, close the respective secondary thread circuit as soon as the main thread circuit is interrupted (DE-PS 35 16 612).
  • Fully electronic main / secondary thread switches are also known (DE-PS 11 81 792). There, separate indicators designed as current transformers are connected both in the main and in the secondary thread circuit of the signal lamp to be monitored. If the main thread is switched on intact, the main thread monitor switches high-impedance electronic switches connected to the secondary thread circuit so that the secondary thread cannot light up. If the main thread is defective, these switches are activated and the secondary thread is switched on, provided that the switches themselves and their actuation work properly. If the main / secondary thread switch malfunctions, it can happen that either the secondary thread is not switched on or that the secondary thread also lights up in addition to the main thread.
  • the object of the invention is to provide a fully electronic main / secondary thread switch according to the preamble of claim 1, which manages with as few inexpensive components that have been tried and tested in practice.
  • the drawing shows a signal lamp L designed as a double thread lamp with a main thread HF and a secondary thread NF, as is used for railway light signals.
  • the signal lamp is fed via the lines drawn thick in the drawing from a lamp transformer T1 arranged, for example, in the vicinity of the signal lamp, which, if necessary, is to be connected to voltage from the remote signal box and thereby supplies the lamp with lamp current.
  • the signal lamp is usually switched on via its main thread HF.
  • an electronic AC switch TRH lying in series with it must have closed the lamp circuit.
  • input diodes of a first optocoupler U1 which are fed antiparallel, are arranged in the control circuit of the main-thread AC switch TRH and are connected in parallel to the main-thread AC switch via resistors R1 and R2.
  • a control current flows through the resistor R2 and the light-emitting diodes to the control electrode of the main thread AC switch TRH and causes the latter to assume the low-resistance switching state.
  • the phototransistor of the optocoupler U1 switches a direct voltage generated by a rectifier G to the gate of an electronic direct current switch S1, which thereby assumes the conductive state.
  • the electronic switch bridges with its source-drain path, the transmission diodes of two optocouplers U2 and U3 connected in series.
  • the transmission diode of the optocoupler U2 is part of an optoelectronically controllable AC switch which is used to control an electronic AC switch TRN in the feed circuit of the auxiliary thread NF of the signal lamp. In the assumed operating state of the signal lamp, this AC switch is switched to high impedance and thus prevents the auxiliary thread from lighting up.
  • a corresponding detector must be connected in series either with the switching path of the electronic DC switch S1 or with the switching path of the first optocoupler switching transistor. Possibly. separate notifications are to be derived using separate detectors, both when the main thread and the secondary thread are switched on, and transmitted to the signal box.
  • the DC voltage required to operate the main / secondary thread switch can advantageously be tapped via the two-way rectifier G at the output terminals of the supplying lamp transformer.
  • the main and minor threads switching AC switches are preferably designed as triacs, the electronic DC switch as a field effect transistor.
  • the electronic switch S1 briefly switches the transmitter diode of the electronic alternating current switch U2 when the supply current flows over the main thread.
  • the arrangement can also be such that the switch in this case disconnects the supply circuit for the transmitter diode of the AC switch.
  • the switching transistor of the optocoupler U1 can also short-circuit the transmitting diode of the optoelectronically controllable AC switch U2 directly or open its supply circuit. Because of the ripple of the voltage supplied to the transmitter diodes of the optocoupler U1, a very low pulsating DC voltage will be able to be tapped at the switching path of the optocoupler switching transistor. In order to prevent the optoelectronically controllable AC switch U2 from turning on as a result of this DC voltage, a capacitor for smoothing this voltage must be connected in parallel with the switching path of the optocoupler transistor.
  • a zener diode is to be connected in series with the transmitter diode of the optoelectronically controllable AC switch U2, the zener voltage of which is at least equal to the voltage across the capacitor when the optocoupler switching transistor is controlled.
  • This Zener voltage is added to the forward voltage of the transmitter diode of the optoelectronically controllable AC switch and prevents the control of this switch when the main thread is illuminated.

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  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Keying Circuit Devices (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Train Traffic Observation, Control, And Security (AREA)

Abstract

AC switches (TRH, TRN) are connected in both the main and standby filament circuit of a signalling lamp (L). As long as the main filament (HF) is switched on and is intact, the main filament AC switch (TRH) is switched through via input diodes, connected in reverse-parallel, of an optocoupler (U1). When current is flowing through the input diodes, the photo-transistor of this optocoupler controls a switch (S1) which is used, in this switching state, to switch off the input diode of an electro-optical AC switch (U2). If the main filament (HF) burns out and the switch (S1) is driven into the other position, the electro-optically controlled AC switch (U2) is switched through and, for its part, switches the standby filament AC switch (TRN) through. The feedback report on the operating state of the signal lamp to the control mechanism takes place via the optocoupler (U3). The main/standby filament switch is constructed using only a few, proven electronic components. It is used especially in railway signalling lights. <IMAGE>

Description

Die Erfindung bezieht sich auf einen Haupt/Nebenfadenumschalter nach dem Oberbegriff des Patentanspruches 1.
Ein derartiger Haupt/Nebenfadenumschalter ist aus der DE-PS 11 81 792 bekannt.The invention relates to a main / secondary thread switch according to the preamble of claim 1.
Such a main / secondary thread switch is known from DE-PS 11 81 792.

In Eisenbahnlichtsignalanlagen sind die verwendeten Signallampen regelmäßig als Doppelfadenlampen ausgebildet, von denen üblicherweise ein Lampenfaden, der sogenannte Hauptfaden, betriebsmäßig an- und abgeschaltet wird. Brennt der Hauptfaden durch, so wird durch einen der betreffenden Signallampe zugeordneten Hauptfadenüberwacher automatisch der zugehörige Nebenfaden angeschaltet, der dann die Funktion des defekten Hauptfadens übernimmt. Die Hauptfadenüberwacher sind üblicherweise als in den Hauptfadenstromkreis geschaltete Stromindikatoren, vorzugsweise Relais, ausgebildet, die mit von ihnen gesteuerten Schaltmitteln, üblicherweise Relaiskontakten, den jeweiligen Nebenfadenstromkreis schließen, sobald der Hauptfadenstromkreis unterbrochen ist (DE-PS 35 16 612).In railway light signal systems, the signal lamps used are regularly designed as double-filament lamps, of which one lamp thread, the so-called main thread, is usually switched on and off during operation. If the main thread burns out, the associated secondary thread is automatically switched on by a main thread monitor assigned to the relevant signal lamp, which then takes over the function of the defective main thread. The main thread monitors are usually designed as current indicators, preferably relays, which are switched into the main thread circuit and which, with the switching means controlled by them, usually relay contacts, close the respective secondary thread circuit as soon as the main thread circuit is interrupted (DE-PS 35 16 612).

Es sind auch bereits vollelektronische Haupt/Nebenfadenumschalter bekannt (DE-PS 11 81 792). Dort sind gesonderte als Stromwandler ausgebildete Indikatoren sowohl in den Haupt- als auch in den Nebenfadenkreis der zu überwachenden Signallampe geschaltet. Bei intaktem angeschaltetem Hauptfaden werden vom Hauptfadenüberwacher aus in den Nebenfadenkreis geschaltete elektronische Schalter hochohmig geschaltet, so daß der Nebenfaden nicht aufleuchten kann. Bei defektem Hauptfaden werden diese Schalter durchgesteuert und der Nebenfaden wird angeschaltet unter der Voraussetzung, daß die Schalter selbst und ihre Ansteuerung ordnungsgerecht arbeiten. Bei einem Fehlverhalten des Haupt/Nebenfadenumschalters kann es dazu kommen, daß entweder der Nebenfaden nicht angeschaltet wird, oder aber, daß zusätzlich zum Haupt- auch der Nebenfaden aufleuchtet.Fully electronic main / secondary thread switches are also known (DE-PS 11 81 792). There, separate indicators designed as current transformers are connected both in the main and in the secondary thread circuit of the signal lamp to be monitored. If the main thread is switched on intact, the main thread monitor switches high-impedance electronic switches connected to the secondary thread circuit so that the secondary thread cannot light up. If the main thread is defective, these switches are activated and the secondary thread is switched on, provided that the switches themselves and their actuation work properly. If the main / secondary thread switch malfunctions, it can happen that either the secondary thread is not switched on or that the secondary thread also lights up in addition to the main thread.

Aufgabe der Erfindung ist es, einen vollelektronischen Haupt/Nebenfadenumschalter nach dem Oberbegriff des Patentanspruches 1 anzugeben, der mit möglichst wenigen, in der Praxis bewährten, preiswerten Bauelementen auskommt.The object of the invention is to provide a fully electronic main / secondary thread switch according to the preamble of claim 1, which manages with as few inexpensive components that have been tried and tested in practice.

Die Erfindung löst diese Aufgabe durch die kennzeichnenden Merkmale des Patentanspruches 1. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.The invention solves this problem by the characterizing features of claim 1. Advantageous refinements of the invention are specified in the subclaims.

Ein Ausführungsbeispiel der Erfindung ist nachstehend unter Bezugnahme auf die Zeichnung näher erläutert.An embodiment of the invention is explained below with reference to the drawing.

Die Zeichnung zeigt eine als Doppelfadenlampe ausgebildete Signallampe L mit einem Hauptfaden HF und einem Nebenfaden NF, wie sie für Eisenbahnlichtsignale Verwendung findet. Gespeist wird die Signallampe über die in der Zeichnung dick ausgezogenen Leitungen aus einem beispielsweise in der Nähe der Signallampe angeordneten Lampentransformator T1, der über Zuleitungen vom fernen Stellwerk aus bedarfsweise an Spannung zu legen ist und dabei die Lampe mit Lampenstrom versorgt. Üblicherweise ist die Signallampe über ihren Hauptfaden HF angeschaltet. Damit ein zum Aufleuchten des Hauptfadens ausreichender Lampenstrom fließt, muß ein mit diesem in Reihe liegender elektronischer Wechselstromschalter TRH den Lampenstromkreis geschlossen haben. Hierzu sind im Steuerstromkreis des Hauptfaden-Wechselstromschalters TRH antiparallel gespeiste Eingangsdioden eines ersten Optokopplers U1 angeordnet, die über Wiederstände R1 und R2 dem Hauptfaden-Wechselstromschalter parallelgeschaltet sind. Solange die Leuchtdioden des Optokopplers U1 stromdurchflossen sind, fließt über den Widerstand R2 und die Leuchtdioden ein Steuerstrom zur Steuerelektrode des Hauptfaden-Wechselstromschalters TRH und veranlaßt diesen, den niederohmigen Schaltzustand einzunehmen.The drawing shows a signal lamp L designed as a double thread lamp with a main thread HF and a secondary thread NF, as is used for railway light signals. The signal lamp is fed via the lines drawn thick in the drawing from a lamp transformer T1 arranged, for example, in the vicinity of the signal lamp, which, if necessary, is to be connected to voltage from the remote signal box and thereby supplies the lamp with lamp current. The signal lamp is usually switched on via its main thread HF. In order for a lamp current sufficient to light up the main thread to flow, an electronic AC switch TRH lying in series with it must have closed the lamp circuit. For this purpose, input diodes of a first optocoupler U1, which are fed antiparallel, are arranged in the control circuit of the main-thread AC switch TRH and are connected in parallel to the main-thread AC switch via resistors R1 and R2. As long as the light-emitting diodes of the optocoupler U1 have current flowing through them, a control current flows through the resistor R2 and the light-emitting diodes to the control electrode of the main thread AC switch TRH and causes the latter to assume the low-resistance switching state.

Der Fototransistor des Optokopplers U1 schaltet, solange die Eingangsdioden stromführend sind, eine von einem Gleichrichter G erzeugte Gleichspannung auf das Gate eines elektronischen Gleichstromschalters S1, der dabei den leitenden Zustand einnimmt. In diesem Zustand überbrückt der elektronische Schalter mit seiner Source-Drain-Strecke die Sendedioden zweier in Reihe geschalteter Optokoppler U2 und U3. Die Sendediode des Optokopplers U2 ist Teil eines optoelektronisch steuerbaren Wechselstromschalters, der dazu dient, einen elektronischen Wechselstromschalter TRN im Speisekreis des Nebenfadens NF der Signallampe zu steuern. Bei dem angenommenen Betriebszustand der Signallampe ist dieser Wechselstromschalter hochohmig geschaltet und verhindert damit ein Aufleuchten des Nebenfadens.As long as the input diodes are live, the phototransistor of the optocoupler U1 switches a direct voltage generated by a rectifier G to the gate of an electronic direct current switch S1, which thereby assumes the conductive state. In this state, the electronic switch bridges with its source-drain path, the transmission diodes of two optocouplers U2 and U3 connected in series. The transmission diode of the optocoupler U2 is part of an optoelectronically controllable AC switch which is used to control an electronic AC switch TRN in the feed circuit of the auxiliary thread NF of the signal lamp. In the assumed operating state of the signal lamp, this AC switch is switched to high impedance and thus prevents the auxiliary thread from lighting up.

Brennt der Hauptfaden der Signallampe durch, so wird die Schaltstrecke des Fototransistors im Optokoppler U1 hochohmig. Damit verschwindet das Steuerpotential am Gate des Gleichstromschalters S1, der bislang die Eingangsdiode des optoelektronisch steuerbaren Wechselstromschalters U2 kurzgeschlossen hatte. Als Folge davon fließt Strom über diese Diode, was zum Durchsteuern des Wechselstromschalters U2 führt. Die Ausgangsdioden dieses Schalters liegen über die Widerstände R3 und R4 parallel zum Nebenfaden-Wechselstromschalter TRN. Der über den Widerstand R3 und die Ausgangsdioden des Wechselstromschalters U2 fließende Steuerstrom schaltet den Nebenfaden-Wechselstromschalter TRN niederohmig und bewirkt damit das Anschalten des Nebenfadens. Dieser Schaltzustand wird dem Stellwerk über einen Optokoppler U3 gemeldet, der beispielsweise mit der Eingangsdiode des optoelektronisch gesteuerten Wechselstromschalters U2 in Reihe geschaltet ist.If the main thread of the signal lamp burns out, the switching path of the phototransistor in the optocoupler U1 becomes high-resistance. The control potential at the gate of the DC switch S1, which had previously short-circuited the input diode of the optoelectronically controllable AC switch U2, thus disappears. As a result, current flows through this diode, causing the AC switch U2 to turn on. The output diodes of this switch are connected through resistors R3 and R4 in parallel to the secondary thread AC switch TRN. The control current flowing through the resistor R3 and the output diodes of the AC switch U2 switches the auxiliary thread AC switch TRN with low resistance and thus causes the auxiliary thread to be switched on. This switching state is reported to the signal box via an optocoupler U3, which is connected in series with the input diode of the optoelectronically controlled AC switch U2, for example.

Wenn eine aktive Meldung nicht bei angeschaltetem Nebenfaden, sondern bei angeschaltetem Hauptfaden gegeben werden soll, ist ein entsprechender Melder entweder mit der Schaltstrecke des elektronischen Gleichstromschalters S1 oder mit der Schaltstrecke des ersten Optokopplerschalttransistor in Reihe zu schalten. Ggf. sind durch gesonderte Melder auch gesonderte Meldungen sowohl bei angeschaltetem Haupt- als auch bei angeschaltetem Nebenfaden abzuleiten und an das Stellwerk zu übertragen.If an active message is to be given not with the secondary thread switched on, but with the main thread switched on, a corresponding detector must be connected in series either with the switching path of the electronic DC switch S1 or with the switching path of the first optocoupler switching transistor. Possibly. separate notifications are to be derived using separate detectors, both when the main thread and the secondary thread are switched on, and transmitted to the signal box.

Die zum Betrieb des Haupt/Nebenfadenumschalters erforderliche Gleichspannung läßt sich in vorteilhafter Weise über den Zweiweggleichrichter G an den Ausgangsklemmen des speisenden Lampentransformators abgreifen. Die den Haupt- und den Nebenfaden schaltenden Wechselstromschalter sind vorzugsweise als Triacs ausgebildet, der elektronische Gleichstromschalter als Feldeffekttransistor.The DC voltage required to operate the main / secondary thread switch can advantageously be tapped via the two-way rectifier G at the output terminals of the supplying lamp transformer. The main and minor threads switching AC switches are preferably designed as triacs, the electronic DC switch as a field effect transistor.

Bei dem dargestellten Ausführungsbeispiel schaltet der elektronische Schalter S1 bei über den Hauptfaden fließendem Speisestrom die Sendediode des elektronischen Wechselstromschalters U2 kurz. Die Anordnung kann jedoch auch so getroffen sein, daß der Schalter in diesem Fall den Speisekreis für die Sendediode des Wechselstromschalters auftrennt.In the exemplary embodiment shown, the electronic switch S1 briefly switches the transmitter diode of the electronic alternating current switch U2 when the supply current flows over the main thread. However, the arrangement can also be such that the switch in this case disconnects the supply circuit for the transmitter diode of the AC switch.

In Abweichung von dem in der Zeichnung dargestellten Ausführungsbeispiel kann der Schalttransistor des Optokopplers U1 die Sendediode des optoelektronisch steuerbaren Wechselstromschalters U2 auch unmittelbar kurzschließen bzw. deren Speisekreis auftrennen. Wegen der Welligkeit der den Sendedioden des Optokopplers U1 zugeführten Spannung wird dabei an der Schaltstrecke des Optokoppler-Schalttransistors eine sehr geringe pulsierende Gleichspannung abgreifbar sein. Um zu verhindern, daß als Folge dieser Gleichspannung der optoelektronisch steuerbare Wechselstromschalter U2 durchschaltet, ist der Schaltstrecke des Optokoppler-Transistors ein Kondensator zum Glätten dieser Spannung parallelzuschalten. Gegebenenfalls ist mit der Sendediode des optoelektronisch steuerbaren Wechselstromschalters U2 noch eine Zenerdiode in Reihe zu schalten, deren Zenerspannung mindestens gleich der bei durchgesteuertem Optokoppler-Schalttransistor am Kondensator liegenden Spannung ist. Diese Zenerspannung addiert sich zu der Durchlaßspannung der Sendediode des optoelektronisch steuerbaren Wechselstromschalters und verhindert bei leuchtendem Hauptfaden das Durchsteuern dieses Schalters.In a departure from the exemplary embodiment shown in the drawing, the switching transistor of the optocoupler U1 can also short-circuit the transmitting diode of the optoelectronically controllable AC switch U2 directly or open its supply circuit. Because of the ripple of the voltage supplied to the transmitter diodes of the optocoupler U1, a very low pulsating DC voltage will be able to be tapped at the switching path of the optocoupler switching transistor. In order to prevent the optoelectronically controllable AC switch U2 from turning on as a result of this DC voltage, a capacitor for smoothing this voltage must be connected in parallel with the switching path of the optocoupler transistor. If necessary, a zener diode is to be connected in series with the transmitter diode of the optoelectronically controllable AC switch U2, the zener voltage of which is at least equal to the voltage across the capacitor when the optocoupler switching transistor is controlled. This Zener voltage is added to the forward voltage of the transmitter diode of the optoelectronically controllable AC switch and prevents the control of this switch when the main thread is illuminated.

Claims (9)

  1. Main/secondary filament change-over switch for double filament lamps, supplied with alternating current, in traffic signal installations, especially in railway light signals, having a main filament monitor assigned to each signal lamp (6) and controlled by the lamp current, for connecting the secondary filament (NF) in the case of fusing of the main filament (HF), characterised in that
    - an electronic alternating current switch (TRH or TRN) is arranged both in the lamp circuit of the main filament and the secondary filament
    - at least one transmitter diode of a first optical-coupler (U1) supplied via the main filament (HF) from the current supply device (T1) of the signal lamp is arranged in the control circuit of the main filament-alternating current switch (TRH), which diode enables the main filament-alternating current switch (TRH) in the current-carrying state,
    - in that the switching transistor of this first optical-coupler (U1) lies at a direct voltage and, in the case of the transmitter diode carrying current, it short-circuits, indirectly or directly, at least one light-emitting diode lying in the supply voltage or interrupts its supply circuit,
    - in that this light-emitting diode is the transmitter diode of an optoelectronically controllable alternating current switch (U2) whose receiver diodes connect to the supplying current supply device (T1) via the secondary filament (NF) of the signal lamp, and in the case of the transmitter diode carrying current they connect the electronic alternating current switch (TRN) arranged in the supply circuit of the secondary filament.
  2. Main/secondary filament change-over switch according to claim 1, characterised in that the first optical-coupler (U1) on the input side connects via the main filament (HF) of the signal lamp (L) to the current supply device (T1) of the signal lamp and has two transmitter diodes connected antiparallel.
  3. Main/secondary filament change-over switch according to claim 1, characterised in that the switching transistor of the first optical-coupler (U1) in the set state sets an electronic switch (S1) for short-circuiting the at least one transmitter diode of the optoelectronically controllable alternating current switch (U2).
  4. Main/secondary filament change-over switch according to claim 3, characterised in that a capacitor is connected in parallel with the breaker gap of the switching transistor of the first optical-coupler (U1).
  5. Main/secondary filament change-over switch according to claim 3 or 4, characterised in that a Zener diode is connected in series with the at least one transmitter diode of the optoelectronically controllable alternating current change-over switch (U2), the Zener voltage of which is at least equal to the voltage set at the breaker gap of the set switching transistor of the first optical-coupler (U1) or at the capacitor.
  6. Main/secondary filament change-over switch according to claim 1 or 3, characterised in that the transmitter diode of a further optical-coupler (U3) is connected in series with the at least one transmitter diode of the optoelectronically controllable alternating current switch (U2), with the breaker gap of the electronic switch (S1) and/or with the breaker gap of the first optical-coupler-switching transistor, the switching transistor of which is used to trigger a monitoring signal.
  7. Main/secondary filament change-over switch according to claim 3, characterised in that the electronic switch (S1) is constructed as a field effect transistor.
  8. Main/secondary filament change-over switch according to one of claims 1 to 7, characterised in that the supply voltage for operating the direct current components of the main/secondary filament change-over switch can be picked up at a rectifier (G) which is connected on the input side to a lamp transformer (T1) suplying the signal lamp (L).
  9. Main/secondary filament change-over switch according to claim 1, characterised in that the electronic main filament and secondary filament alternating current switches (TRH or TRN) are constructed as triacs.
EP90123330A 1989-12-14 1990-12-05 Main-standby filament switch for AC driven two-filament lamps in traffic signalling devices Expired - Lifetime EP0432624B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90123330T ATE102427T1 (en) 1989-12-14 1990-12-05 MAIN/SUB filament switch for AC powered twin filament lamps in traffic signal systems.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3941328A DE3941328A1 (en) 1989-12-14 1989-12-14 MAIN / ADDITIONAL THREAD SWITCH FOR AC POWERED DOUBLE THREAD LAMPS IN TRAFFIC SIGNALS
DE3941328 1989-12-14

Publications (2)

Publication Number Publication Date
EP0432624A1 EP0432624A1 (en) 1991-06-19
EP0432624B1 true EP0432624B1 (en) 1994-03-02

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EP90123330A Expired - Lifetime EP0432624B1 (en) 1989-12-14 1990-12-05 Main-standby filament switch for AC driven two-filament lamps in traffic signalling devices

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EP (1) EP0432624B1 (en)
AT (1) ATE102427T1 (en)
DE (2) DE3941328A1 (en)
DK (1) DK0432624T3 (en)
ES (1) ES2051443T3 (en)
FI (1) FI97676C (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4120893C2 (en) * 1991-06-25 2000-06-15 Bayerische Motoren Werke Ag Lighting device for motor vehicles
DE19606896C2 (en) * 1996-02-13 2001-04-05 Siemens Ag Circuit for setting and monitoring light signals
KR100468890B1 (en) * 2002-11-01 2005-01-29 한국철도기술연구원 Control System for Pair Type 3 Light 3 State Display Signal Lamp of Rail Road
RU2493605C1 (en) * 2012-02-17 2013-09-20 Евгений Александрович Оленев Method for operation of lens traffic light with double-filament lamp and apparatus for realising said method
CN114202904A (en) * 2022-02-18 2022-03-18 山东冠嘉智能设备有限公司 Power failure alarm device of automatic packaging machine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1181792B (en) * 1963-06-29 1964-11-19 Pintsch Bamag Ag Monitoring circuit for main and secondary threads of incandescent lamps, especially signal lamps
DE1566901A1 (en) * 1967-03-21 1970-04-30 Licentia Gmbh Arrangement for monitoring signal lamps for thread breakage
NL178634C (en) * 1978-01-02 1986-04-16 Philips Nv DEVICE FOR DETECTING UNWANTED SIGNAL COMBINATIONS OF TWO SIGNAL LIGHTS IN TRAFFIC LIGHTS.
US4380718A (en) * 1981-05-22 1983-04-19 Kelsey-Hayes Co. Trailer marker light substitution circuit

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FI906154A (en) 1991-06-15
DE3941328A1 (en) 1991-06-20
DE59004777D1 (en) 1994-04-07
ES2051443T3 (en) 1994-06-16
ATE102427T1 (en) 1994-03-15
EP0432624A1 (en) 1991-06-19
FI97676C (en) 1997-01-27
FI97676B (en) 1996-10-15
FI906154A0 (en) 1990-12-13
DK0432624T3 (en) 1994-06-13

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