EP0427042B1 - System for operating a portable lamp - Google Patents

System for operating a portable lamp Download PDF

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Publication number
EP0427042B1
EP0427042B1 EP90120310A EP90120310A EP0427042B1 EP 0427042 B1 EP0427042 B1 EP 0427042B1 EP 90120310 A EP90120310 A EP 90120310A EP 90120310 A EP90120310 A EP 90120310A EP 0427042 B1 EP0427042 B1 EP 0427042B1
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EP
European Patent Office
Prior art keywords
lamp
battery
voltage
bulb
circuit
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 - Lifetime
Application number
EP90120310A
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German (de)
French (fr)
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EP0427042A3 (en
EP0427042A2 (en
Inventor
Siegfried Ormanns
Rainald Grevé
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RAG AG
Original Assignee
Ruhrkohle AG
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Publication date
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Publication of EP0427042A2 publication Critical patent/EP0427042A2/en
Publication of EP0427042A3 publication Critical patent/EP0427042A3/en
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Publication of EP0427042B1 publication Critical patent/EP0427042B1/en
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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14Circuit arrangements
    • H05B41/16Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
    • H05B41/20Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch
    • H05B41/23Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode
    • H05B41/232Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode for low-pressure lamps
    • H05B41/2325Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode for low-pressure lamps provided with pre-heating electrodes
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14Circuit arrangements
    • H05B41/36Controlling
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14Circuit arrangements
    • H05B41/36Controlling
    • H05B41/38Controlling the intensity of light
    • H05B41/382Controlling the intensity of light during the transitional start-up phase

Definitions

  • the invention relates to a method according to the preamble of claim 1, an arrangement according to the preamble of claim 4 or a lamp according to the preamble of claim 10.
  • Head lamps suitable for use in underground coal mining are usually operated with incandescent lamps.
  • the rechargeable battery or battery arrangement operationally supplies the lamp with a voltage which is harmless given the currents flowing in the lamp.
  • fluorescent lamps low-pressure gas discharge lamps
  • incandescent lamps have a significantly higher luminous efficacy than incandescent lamps.
  • they often have longer lifetimes than incandescent lamps.
  • a portable luminaire is known from US Pat. No. 3,953,768, in which two fluorescent lamps connected in parallel are supplied from batteries and are operated with inverters with high-frequency alternating current.
  • Portable inverters for generating the high-frequency operating current for fluorescent lamps are relatively expensive.
  • the known luminaire is neither intended nor suitable for use in potentially explosive areas.
  • the invention has for its object to make the above-mentioned advantages of a fluorescent lamp, ie high luminous efficacy and lifespan, usable in portable luminaires for potentially explosive areas.
  • the invention creates the conditions for the advantageous use of fluorescent lamps as light sources in portable lights for potentially explosive areas.
  • the high luminous efficacy with lower energy consumption enables a power supply with relatively small and correspondingly light batteries.
  • This weight and space saving is particularly advantageous for portable lights. Since the cathodes are preheated, the fluorescent lamp has a long service life and thus low operating costs.
  • the preheating and ignition are carried out outside the hazardous areas, preferably in special lamp rooms, in which a large number of connections are available for charging, preheating and igniting a corresponding number of lights.
  • the lamp operating circuit is preferably interrupted by means of a switching device which is connected to the charging circuit and can be activated by the charging voltage. This measure ensures that the lamp is only switched on during its operational use, but is switched off during the charging phase. This contributes to increasing the life of the lamp.
  • a further development of the invention provides that the interruption of the charging voltage, the application of the heating voltage and the application of the ignition voltage take place synchronously and in a phase-locked manner with the decoupling process when the lamp is removed from the discharge station.
  • the lamp from the Charger or heating or ignition current circuits of the charger are supplied with power via separate lamp connections and two switching devices.
  • the first switching device ensures the coupling of the lamp or the associated battery to the charging circuit
  • the second switching device which is preferably in a predetermined switching phase relationship to the first switching device, is used for the automatic connection of the lamp electrodes to the heating or ignition circuits in the charging station .
  • an ignition voltage transmitter is installed in the lamp, which is connected to the lamp electrodes and can be operated manually via a switch. With the help of this ignition voltage sensor, the fluorescent lamp can be switched on without preheating. The operation of this cold start system affects the life of the lamp and is therefore only useful in the event that no second light source is available in the lamp.
  • an auxiliary light source in the form of an incandescent lamp is connected to the battery circuit in parallel with the fluorescent lamp.
  • the light bulb branch can be interrupted during normal operation of the fluorescent lamp.
  • an undercurrent release is integrated into the operating circuit of the fluorescent lamp and is designed such that it switches on the incandescent lamp branch to the battery after falling below a current threshold value, possibly with a time delay.
  • the incandescent lamp is therefore switched on automatically (emergency light) when the fluorescent lamp burning path is interrupted, for example due to violent vibrations.
  • the fluorescent lamp has a relatively large luminous area and therefore works together with a flat reflector. At best, focusing is possible in the close range.
  • the incandescent lamp is a practically punctiform A separate, more curved reflector is assigned to the light source, and the incandescent lamp can also be effectively focused in the far range. The latter happens by a relative shift between the reflector and the incandescent lamp or by using a 2-filament incandescent lamp.
  • the arrangement can be such that the incandescent lamp can be operated in addition to the fluorescent lamp, specifically by a bypass that bypasses the undercurrent release. Suitable switching means ensure the operation of the incandescent lamp, including also for their shutdown despite activation of the undercurrent release.
  • the two reflectors are preferably arranged in a common tubular housing, at their opposite ends.
  • the housing is rotated as needed.
  • Fig. 1 the electrical components of a portable mine light are shown in a dash-dotted block 1 in association with the connections of a specially designed battery charger.
  • the portable head lamp 1 has an accumulator arrangement 10, hereinafter called (rechargeable) battery, which for Power supply to a light source designed as a low-pressure gas discharge lamp (fluorescent lamp) 11 is used.
  • a light source designed as a low-pressure gas discharge lamp (fluorescent lamp) 11 is used.
  • an opener 120 operated by a switching device 12 and a DC / DC converter 13 which converts the battery voltage from 2.4 or 3.6 V, for example, to the voltage of 24 to 30 V required by the fluorescent lamp 11 as the operating voltage.
  • the DC-DC converter can of course be omitted if the battery voltage corresponds to the lamp voltage.
  • an undercurrent release 14 which, when falling below a predetermined current threshold - preferably with a time delay - actuates a make contact 140, a dimmer 15, a series resistor 16 and a decoupling diode 17.
  • a predetermined current threshold - preferably with a time delay - actuates a make contact 140, a dimmer 15, a series resistor 16 and a decoupling diode 17.
  • an incandescent lamp 18 which serves as an auxiliary light source and which, after an interruption of the main branch by the lamp 11, is automatically switched on to the battery supply voltage (converter 13) and serves as an emergency light source.
  • a manually operated opener 19 enables the selective switching off of the emergency light source 18.
  • Another manually operated switch 19 ' is used to optionally operate the incandescent lamp 18 bypassing the closer 140 in addition to the fluorescent lamp 11, see Fig. 3.
  • a closed bypass can be provided, in which case the function of the switch 19 'is taken over by the opener 19.
  • the head lamp 1 is coupled to the charger by means of a rotary coupling, not shown in the drawing, via which on the one hand a mechanical mounting of the lamp 1 on the charger and on the other hand an electrical coupling of the lamp connections 20, 21; 22, 23 and 24 with associated connections 30, 31, 32 and 33 of the charger. Because of this mechanical-electrical Coupling, it is possible to bring the charging, heating and ignition circuits described in more detail below into a predetermined switching phase relationship at the start of charging and when the head lamp is removed.
  • the charging voltage U L is connected to the battery charging circuit via a preferably selectively actuable switch 34 with two switching contacts designed as make contacts via connection pairs 30, 20 and 31, 21. When U L is applied, the switching device 12 is activated and interrupts the lamp operating circuit via the break contact 120. The battery 10 is then charged with the charging voltage U L via a decoupling diode 25. The lamp 11 is extinguished.
  • the circuit of the lamp 1 is coupled via the connections 22, 23 and 24 and the counter connections 32, 33 to the heating and ignition circuits in the charger.
  • the switches or switching contacts 35, 36 and 37 designed as openers are opened, so that the connections 32 and 33 and the counter connections of the lamp 1 are de-energized.
  • the switch 34 is first opened; the switching device 12 shown as a relay is de-energized, and the switching contact 120 closes the battery circuit via the converter 13.
  • the switching contacts 35, 36 close the heating circuit, which is a series resistor from the positive terminal of the heating voltage source U H via the switching contact 35 38, the connection 32 designed as a contact bridge, the light-side connection 24, the connection point 26 to the cathode 110 to be heated, the connection 23, the device-side counter-connection 33 and the switching contact 36 to the negative pole of the heating voltage U H.
  • the switch or switching contact 37 also closes and triggers an ignition device 39.
  • the ignition device 39 applies a suitable ignition voltage to the anode 111 of the fluorescent lamp 11 via a contact bridge at the connection 32, with the result that the lamp 11 ignites.
  • the operating voltage is fed from the battery 10, between the preheated cathode 110 and the anode 111, so that the lamp remains on when, in the last phase of the mechanical decoupling of the lamp 1, there is also electrical separation from the charger.
  • the heating voltage U H can deviate from the charging voltage U L ; however, can also match this. In this case, the connection chambers of U L and U H are interconnected.
  • Any provided lighting ignition device for cold starting the lamp 11 should be integrated between the connections 22 and 23.
  • FIG. 2 shows an electronic switching device to replace the relay arrangement 12, 120 in FIG. 1.
  • This electronic switching device has two transistors T1 and T2, of which T2 performs the function of the break contact 120.
  • T1 is blocked during battery operation, the base of transistor T2 is at a relatively high potential via resistor R2 and makes the collector-emitter path of T1 conductive.
  • the decoupling diode 25 prevents current flow from the positive pole of the battery through the resistor R1 to the base of T1.
  • switch 34 is closed; the battery 10 is charged via the diode 25.
  • the potential of the base of transistor T1 is raised above R1, making T1 conductive and pulling the base of T2 down to the negative potential.
  • the consequence is a blocking of T2, i.e. the interruption of the lamp 11 supply circuit in FIG. 1
  • Fig. 3 shows a reversible lamp, which can also be designed as a head lamp or as a portable lamp.
  • the reversible lamp has a housing 40 which is mounted in a fork 41 and can be pivoted about a horizontal axis running perpendicular to the plane of the drawing.
  • the fork 41 is rotatably mounted or can be fastened in a reversible orientation on a pit helmet.
  • the housing 40 is tubular and carries on it The fluorescent lamp 11 at one end and the incandescent lamp 18 at its opposite end.
  • the fluorescent lamp 11 is assigned a relatively flat reflector 42, while the incandescent lamp 18 is located in a more curved reflector 43. The latter can be moved in the axial direction for focusing.
  • a selective actuation of the switching sequence of charging, heating and or ignition circuits can also be provided.
  • the switching phases can also be made adjustable with the aid of a suitable switching mechanism and can be operated either automatically or selectively. It is essential to integrate all the electrical components required for a so-called soft ignition of a fluorescent lamp into the charger or to assign them to the charger, so that the fluorescent lamp is reliably ignited and switched on when the lamp is removed from the removal device.
  • the undercurrent monitor 14 should preferably only be effective with a time delay so that the auxiliary circuit is prevented from being closed via the incandescent lamp 18 before the fluorescent lamp 11 is ignited.
  • the dimmer is used to adjust the luminous flux. Of course, it can be omitted.
  • a suitable series resistor can be switched into the auxiliary current branch to the incandescent lamp 18 in order to adapt the incandescent lamp operating voltage to the voltage at the output of the converter 13.
  • the configuration and timing of the switches or switching contacts 35 and 36 or 37 for actuating the heating and ignition circuits can be modified in many ways. In this respect, the circuit arrangement shown in FIG. 1 is only to be regarded as a viable alternative for carrying out the method according to the invention.
  • the housing 3 can also be designed so that the housing has a single light exit opening, the two light sources with their reflectors behind Can be pushed or swiveled in front of this opening. Accordingly, the outer shape of the housing can change.
  • the incandescent lamp 18 can be displaceable instead of or in addition to the reflector 43.
  • the use of a 2-filament light bulb is also an option.

Description

Die Erfindung betrifft ein Verfahren nach dem Oberbegriff des Patentanspruchs 1, eine Anordnung nach dem Oberbegriff des Patentanspruchs 4 bzw. eine Leuchte nach dem Oberbegriff des Patentanspruchs 10.The invention relates to a method according to the preamble of claim 1, an arrangement according to the preamble of claim 4 or a lamp according to the preamble of claim 10.

Für den Einsatz im Steinkohlenbergbau unter Tage geeignete Kopfleuchten werden in der Regel mit Glühlampen betrieben. Die wiederaufladbare Batterie oder Batterieanordnung versorgt die Lampe betriebsmäßig mit einer Spannung, die bei den in der Lampe fließenden Strömen ungefährlich ist.Head lamps suitable for use in underground coal mining are usually operated with incandescent lamps. The rechargeable battery or battery arrangement operationally supplies the lamp with a voltage which is harmless given the currents flowing in the lamp.

Es ist bekannt, daß Niederdruck-Gasentladungslampen, im folgenden kurz Leuchtstofflampen genannt, eine wesentlich höhere Lichtausbeute als Glühlampen haben. Darüberhinaus haben sie vielfach höhere Lebensdauern als Glühlampen. Insofern wäre es wünschenswert, Leuchtstofflampen anstelle der herkömmlichen Glühlampen in Kopfleuchten zu verwenden. Diese wünschenswerte Maßnahme scheiterte bisher an den mit dem Einschalten von Leuchtstofflampen verbundenen Problemen.It is known that low-pressure gas discharge lamps, hereinafter referred to as fluorescent lamps, have a significantly higher luminous efficacy than incandescent lamps. In addition, they often have longer lifetimes than incandescent lamps. In this respect, it would be desirable to use fluorescent lamps instead of conventional incandescent lamps in head lamps. This desirable measure has so far failed due to the problems associated with switching on fluorescent lamps.

Aus der US-A-3 953 768 ist eine tragbare Leuchte bekannt, bei der zwei parallel geschaltete Leuchtstofflampen aus Batterien versorgt und über Wechselrichter mit hochfrequentem Wechselstrom betrieben werden. Tragbare Wechselrichter zur Erzeugung des hochfrequenten Betriebsstroms für Leuchtstofflampen sind relativ kostspielig. Die bekannte Leuchte ist für den Einsatz in explosionsgefährdeten Bereichen weder vorgesehen noch geeignet.A portable luminaire is known from US Pat. No. 3,953,768, in which two fluorescent lamps connected in parallel are supplied from batteries and are operated with inverters with high-frequency alternating current. Portable inverters for generating the high-frequency operating current for fluorescent lamps are relatively expensive. The known luminaire is neither intended nor suitable for use in potentially explosive areas.

GleichstrombetriebeneDC powered

Leuchtstofflampen können

  • a) unter Anlegen einer hohen Zündspannung kalt gestartet oder
  • b) nach Vorheizung der Kathoden mit einer wesentlich niedrigeren Zündspannung (weich) gestartet werden.
Fluorescent lamps can
  • a) cold started by applying a high ignition voltage or
  • b) after preheating the cathodes with a much lower ignition voltage (soft).

Einschaltvorgänge ohne Vorheizung (Kaltstart) setzten die Lebensdauer der Leuchtstofflampe wesentlich herab. Die durchschnittliche Lebensdauer einer kaltgestarteten Leuchtstofflampe beträgt nur etwa 1/8 einer vorgeheizten Lampe. Das Vorheizen der Kathode ist aber in explosionsgefährdeten Bereichen nicht möglich, weil eine Zerstörung der Lampe bzw. Röhre während der Heizphase Gase und/oder Stäube entzünden und Gasexplosionen auslösen kann.Switching on without preheating (cold start) significantly reduces the life of the fluorescent lamp. The average lifespan of a cold started fluorescent lamp is only about 1/8 of a preheated lamp. Preheating the cathode is not possible in potentially explosive areas because destruction of the lamp or tube during the heating phase can ignite gases and / or dusts and trigger gas explosions.

Der Erfindung liegt die Aufgabe zugrunde, die oben genannten Vorteile einer Leuchtstofflampe, d.h. hohe Lichtausbeute und Lebensdauer, in tragbaren Leuchten für explosionsgefährdete Bereiche nutzbar zu machen.The invention has for its object to make the above-mentioned advantages of a fluorescent lamp, ie high luminous efficacy and lifespan, usable in portable luminaires for potentially explosive areas.

Verfahrensmäßig wird diese Aufgabe gelöst durch die kennzeichnenden Merkmale des Patentanspruchs 1. Die erfindungsgemäße Anordnung zeichnet sich durch die kennzeichnenden Merkmale des Patentanspruchs 4 aus, und zwar vorzugsweise unter Verwendung einer Leuchte mit den Merkmalen des Patentanspruchs 10.In terms of method, this object is achieved by the characterizing features of patent claim 1. The arrangement according to the invention is characterized by the characterizing features of patent claim 4, preferably using a lamp with the features of patent claim 10.

Die Erfindung schafft die Voraussetzungen für den vorteilhaften Einsatz von Leuchtstofflampen als Lichtquelle in tragbaren Leuchten für explosionsgefährdete Bereiche. Die höhe Lichtausbeute bei geringerem Energiebedarf ermöglicht eine Stromversorgung mit relativ kleinen und entsprechend leichten Batterien. Diese Gewichts- und Platzeinsparung ist bei tragbaren Leuchten besonders vorteilhaft. Da die Kathoden vorgeheizt werden, ist für eine hohe Lebensdauer der Leuchtstofflampe und damit niedrige Betriebskosten gesorgt.The invention creates the conditions for the advantageous use of fluorescent lamps as light sources in portable lights for potentially explosive areas. The high luminous efficacy with lower energy consumption enables a power supply with relatively small and correspondingly light batteries. This weight and space saving is particularly advantageous for portable lights. Since the cathodes are preheated, the fluorescent lamp has a long service life and thus low operating costs.

Die Vorheizung und Zündung werden außerhalb der explosionsgefährdeten Bereiche durchgeführt, vorzugsweise in besondere Lampenräumen, in denen eine Vielzahl von Anschlüssen zum Aufladen, Vorheizen und Zünden einer entsprechenden Anzahl von Leuchten zur Verfügung stehen. Vorzugsweise wird vor Beginn der Wiederaufladung der Lampen-Betriebsstromkreis mittels einer Schalteinrichtung unterbrochen, die an den Ladestromkreis angebunden und durch die Ladespannung aktivierbar ist. Durch diese Maßnahme ist gewährleistet, daß die Lampe nur während ihres betrieblichen Einsatzes eingeschaltet, während der Ladephase aber ausgeschaltet ist. Dies trägt zur Erhöhung der Lebensdauer der Lampe bei.The preheating and ignition are carried out outside the hazardous areas, preferably in special lamp rooms, in which a large number of connections are available for charging, preheating and igniting a corresponding number of lights. Before the start of the recharging, the lamp operating circuit is preferably interrupted by means of a switching device which is connected to the charging circuit and can be activated by the charging voltage. This measure ensures that the lamp is only switched on during its operational use, but is switched off during the charging phase. This contributes to increasing the life of the lamp.

Um die Lampe zuverlässig unter Vorheizung zünden zu können, ist in Weiterbildung der Erfindung vorgesehen, daß das Unterbrechen der Ladespannung, das Anlegen der Heizspannung und das Anlegen der Zündspannung synchron und phasenstarr mit dem Entkopplungsvorgang bei der Entnahme der Leuchte aus der Entladestation erfolgen.In order to be able to reliably ignite the lamp under preheating, a further development of the invention provides that the interruption of the charging voltage, the application of the heating voltage and the application of the ignition voltage take place synchronously and in a phase-locked manner with the decoupling process when the lamp is removed from the discharge station.

In bevorzugter Ausführungsform wird die Leuchte aus den Lade- bzw. Heiz- bzw. Zündstomkreisen des Ladegeräts über getrennte Leuchtenanschlüsse und zwei Schalteinrichtungen mit Strom versorgt. Die erste Schalteinrichtung sorgt für die Ankopplung der Leuchte bzw. der zugehörigen Batterie an den Ladestromkreis, und die zweite Schalteinrichtung, die vorzugsweise in einer vorgegebenenen Schaltphasenbeziehung zur ersten Schalteinrichtung steht, dient der automatischen Anbindung der Lampenelektroden an die Heiz- bzw. Zündstromkreise in der Ladestation.In a preferred embodiment, the lamp from the Charger or heating or ignition current circuits of the charger are supplied with power via separate lamp connections and two switching devices. The first switching device ensures the coupling of the lamp or the associated battery to the charging circuit, and the second switching device, which is preferably in a predetermined switching phase relationship to the first switching device, is used for the automatic connection of the lamp electrodes to the heating or ignition circuits in the charging station .

Es ist u.U. vorteilhaft, in die Leuchte ein zusätzliches Kaltstartsystem einzubauen. Zu diesem Zweck ist in der Leuchte ein Zündspannungsgeber eingebaut, der mit den Lampenelektroden verbunden und über einen Schalter handbetätigbar ist. Mit Hilfe dieses Zündspannungsgebers kann die Leuchtstofflampe ohne Vorheizung eingeschaltet werden. Der Betrieb dieses Kaltstartsystems beeinträchtigt jedoch die Lebensdauer der Lampe und ist daher nur für den Fall zweckmäßig, daß keine zweite Lichtquelle in der Leuchte zur Verfügung steht.It may be advantageous to install an additional cold start system in the lamp. For this purpose, an ignition voltage transmitter is installed in the lamp, which is connected to the lamp electrodes and can be operated manually via a switch. With the help of this ignition voltage sensor, the fluorescent lamp can be switched on without preheating. The operation of this cold start system affects the life of the lamp and is therefore only useful in the event that no second light source is available in the lamp.

Bei einer bevorzugten Ausführungsform der Erfindung ist aber parallel zur Leuchtstofflampe eine Hilfslichtquelle in Form einer Glühlampe an den Batteriestromkreis angebunden. Der Glühlampenzweig kann bei normalem Betrieb der Leuchtstofflampe unterbrochen sein. Zum Einschalten ist ein Unterstromauslöser in den Betriebsstromkreis der Leuchtstofflampe eingebunden und so ausgebildet, daß er nach Unterschreiten eines Stromschwellwerts - gegebenenfalls zeitverzögert - den Glühlampenzweig an die Batterie anschaltet. Die Glühlampe wird daher bei Unterbrechen der Leuchtstofflampen-Brennstrecke, bedingt beispielsweise durch heftige Erschütterungen, automatisch eingeschaltete (Notlicht).In a preferred embodiment of the invention, however, an auxiliary light source in the form of an incandescent lamp is connected to the battery circuit in parallel with the fluorescent lamp. The light bulb branch can be interrupted during normal operation of the fluorescent lamp. To switch on, an undercurrent release is integrated into the operating circuit of the fluorescent lamp and is designed such that it switches on the incandescent lamp branch to the battery after falling below a current threshold value, possibly with a time delay. The incandescent lamp is therefore switched on automatically (emergency light) when the fluorescent lamp burning path is interrupted, for example due to violent vibrations.

Die Leuchtstofflampe hat eine relativ große Leuchtfläche und arbeitet daher mit einem flachen Reflektor zusammen. Eine Fokussierung ist bestenfalls im Nahbereich möglich. Erfindungsgemäß wird der Glühlampe, die eine praktisch punktförmige Lichtquelle bildet, ein gesonderter, stärker gekrümmter Reflektor zugeordnet, wobei die Glühlampe auch im Fernbereich wirksam fokussierbar ist. Letzteres geschieht durch eine Relativverschiebung zwischen Reflektor und Glühlampe oder auch durch Verwendung einer 2-Faden-Glühlampe.The fluorescent lamp has a relatively large luminous area and therefore works together with a flat reflector. At best, focusing is possible in the close range. According to the invention, the incandescent lamp is a practically punctiform A separate, more curved reflector is assigned to the light source, and the incandescent lamp can also be effectively focused in the far range. The latter happens by a relative shift between the reflector and the incandescent lamp or by using a 2-filament incandescent lamp.

Dabei kann die Anordnung so getroffen werden, daß sich die Glühlampe zusätzlich zu der Leuchtstofflampe betreiben läßt, und zwar über einen Beipaß, der den Unterstromauslöser umgeht. Geeignete Schaltmittel sorgen für den Betrieb der Glühlampe, u.a. auch für deren Abschaltung trotz Aktivierung des Unterstromauslösers.The arrangement can be such that the incandescent lamp can be operated in addition to the fluorescent lamp, specifically by a bypass that bypasses the undercurrent release. Suitable switching means ensure the operation of the incandescent lamp, including also for their shutdown despite activation of the undercurrent release.

Die beiden Reflektoren sind vorzugsweise in einem gemeinsamen rohrförmigen Gehäuse angeordnet, und zwar an dessen entgegengesetzten Enden. Das Gehäuse wird nach Bedarf gedreht.The two reflectors are preferably arranged in a common tubular housing, at their opposite ends. The housing is rotated as needed.

Weiterbildungen und zweckmäßige Ausführungsbeispiele der Erfindung sind in den Unteransprüchen gekennzeichnet.Further developments and expedient exemplary embodiments of the invention are characterized in the subclaims.

Im folgenden wird die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert. In der Zeichnung zeigen:

Fig. 1
ein Ausführungsbeispiel einer batteriebetriebenen Leuchtenanordnung in Zuordnung zu den Anschlüssen ener Ladestation;
Fig. 2
eine Ausführungsform einer an den Ladekreis der Anordnung gemäß Fig. 1 angebundenen und den Lampen-Betriebsstromkreis schaltenden Schalteinrichtung; und
Fig. 3
eine zum Teil geschnittenen Seitenansicht einer erfindungsgemäßen Wendeleuchte.
The invention is explained in more detail below with reference to an embodiment shown in the drawing. The drawing shows:
Fig. 1
an embodiment of a battery-operated lamp arrangement in association with the connections of a charging station;
Fig. 2
an embodiment of a switching device connected to the charging circuit of the arrangement according to FIG. 1 and switching the lamp operating circuit; and
Fig. 3
a partially sectioned side view of a turning light according to the invention.

In Fig. 1 sind die elektrischen Komponenten einer tragbaren Grubenleuchte in einem strichpunktierten Block 1 in Zuordnung zu den Anschlüssen eines besonders ausgebildeten Batterieladegerätes gezeigt.In Fig. 1, the electrical components of a portable mine light are shown in a dash-dotted block 1 in association with the connections of a specially designed battery charger.

Die tragbare Kopfleuchte 1 hat eine Akkumulatoranordnung 10, im folgenden (wiederaufladbare) Batterie genannt, die zur Stromversorgung einer als Niederdruck-Gasentladungslampe (Leuchtstofflampe) 11 ausgebildeten Lichtquelle dient. Im Batteriestromkreis liegt ein von einer Schalteinrichtung 12 betätigter Öffner 120 und ein Gleichspannungswandler 13, der die Batteriespannung von beispieslweise 2,4 oder 3,6 V auf die als Betriebsspannung von der Leuchtstofflampe 11 benötigte Spannung von beispielsweise 24 bis 30 V wandelt. Der Gleichspannungswandler kann natürlich entfallen, wenn die Batteriespannung der Lampenspannung entspricht.The portable head lamp 1 has an accumulator arrangement 10, hereinafter called (rechargeable) battery, which for Power supply to a light source designed as a low-pressure gas discharge lamp (fluorescent lamp) 11 is used. In the battery circuit there is an opener 120 operated by a switching device 12 and a DC / DC converter 13 which converts the battery voltage from 2.4 or 3.6 V, for example, to the voltage of 24 to 30 V required by the fluorescent lamp 11 as the operating voltage. The DC-DC converter can of course be omitted if the battery voltage corresponds to the lamp voltage.

Im Betriebsstromkreis der Leuchtstofflampe 11 liegen in dem dargestellten Ausführungsbeispiel ein Unterstromauslöser 14, der bei Unterschreiten einer vorgegebenen Stromschwelle - vorzugsweise zeitverzögert - einen Schließer 140 betätigt, ein Dimmer 15, ein Vorwiderstand 16 und eine Entkopplungsdiode 17. In einem zum Unterstromwächter 14 und zur Leuchtstofflampe 11 parallel angeordneten Leitungszweig liegt eine als Hilfslichtquelle dienende Glühlampe 18, die nach einer Unterbrechung des Hauptzweiges durch die Lampe 11 über den Schließer 140 automatisch an die Batterie-Versorgungsspannung (Wandler 13) angeschaltet wird und als Notlichtquelle dient. Ein handbetätigter Öffner 19 ermöglicht die selektive Ausschaltung der Notlichtquelle 18. Ein weiterer handbetätigter Schalter 19′ dient dazu, die Glühlampe 18 unter Umgehung des Schließers 140 wahlweise auch zusätzlich zu der Leuchtstofflampe 11 zu betreiben, siehe Fig. 3. Anstelle des Schalters 19′ kann ein geschlossener Beipaß vorgesehen sein, wobei dann die Funktion des Schalters 19′ von dem Öffner 19 mit übernommen wird.In the operating circuit of the fluorescent lamp 11, in the exemplary embodiment shown, there is an undercurrent release 14 which, when falling below a predetermined current threshold - preferably with a time delay - actuates a make contact 140, a dimmer 15, a series resistor 16 and a decoupling diode 17. In one to the undercurrent monitor 14 and to the fluorescent lamp 11 In parallel line branch is an incandescent lamp 18 which serves as an auxiliary light source and which, after an interruption of the main branch by the lamp 11, is automatically switched on to the battery supply voltage (converter 13) and serves as an emergency light source. A manually operated opener 19 enables the selective switching off of the emergency light source 18. Another manually operated switch 19 'is used to optionally operate the incandescent lamp 18 bypassing the closer 140 in addition to the fluorescent lamp 11, see Fig. 3. Instead of the switch 19' a closed bypass can be provided, in which case the function of the switch 19 'is taken over by the opener 19.

Die Kopplung der Kopfleuchte 1 mit dem Ladegerät erfolgt bei dem beschriebenen Ausführungsbeispiel durch eine in der Zeichnung nicht dargestellte Drehkupplung, über die einerseits eine mechanische Halterung der Leuchte 1 am Ladegerät und andererseits eine elektrische Kopplung der Leuchtenanschlüsse 20, 21; 22, 23 und 24 mit zugehörigen Anschlüssen 30, 31, 32 und 33 des Ladegeräts erfolgt. Aufgrund dieser mechanisch- elektrischen Kopplung ist es möglich, die weiter unten genauer beschriebenen Lade-, Heiz- und Zündstromkreise bei Ladebeginn und bei der Entnahme der Kopfleuchte in eine vorgegebene Schaltphasenbeziehung zu bringen. Die Ladespannung UL wird über einen vorzugsweise selektiv betätigbaren Schalter 34 mit zwei als Schließer ausgebildeten Schaltkontakten über Anschlußpaare 30, 20 und 31, 21 an den Batterieladekreis angeschaltet. Bei Beaufschlagung mit UL wird die Schalteinrichtung 12 aktiviert und unterbricht den Lampen-Betriebsstromkreis über den Öffner 120. Über eine Entkopplungsdiode 25 wird danach die Batterie 10 mit der Ladespannung UL aufgeladen. Die Lampe 11 ist gelöscht.In the exemplary embodiment described, the head lamp 1 is coupled to the charger by means of a rotary coupling, not shown in the drawing, via which on the one hand a mechanical mounting of the lamp 1 on the charger and on the other hand an electrical coupling of the lamp connections 20, 21; 22, 23 and 24 with associated connections 30, 31, 32 and 33 of the charger. Because of this mechanical-electrical Coupling, it is possible to bring the charging, heating and ignition circuits described in more detail below into a predetermined switching phase relationship at the start of charging and when the head lamp is removed. The charging voltage U L is connected to the battery charging circuit via a preferably selectively actuable switch 34 with two switching contacts designed as make contacts via connection pairs 30, 20 and 31, 21. When U L is applied, the switching device 12 is activated and interrupts the lamp operating circuit via the break contact 120. The battery 10 is then charged with the charging voltage U L via a decoupling diode 25. The lamp 11 is extinguished.

Die Schaltung der Leuchte 1 ist über die Anschlüsse 22, 23 und 24 und die Gegenanschlüsse 32, 33 mit den Heiz- und Zündstromkreisen im Ladegerät gekoppelt. Während der Ladephase der Batterie 10 sind die als Öffner ausgebildeten Schalter bzw. Schaltkontakte 35, 36 und 37 geöffnet, so daß die Anschlüsse 32 und 33 und die Gegenanschlüsse der Leuchte 1 stromlos sind. Bei Entnahme der Leuchte 1, d.h. am Ende der Ladephase im Ladegerät, wird zunächst der Schalter 34 geöffnet; die als Relais gezeigte Schalteinrichtung 12 wird entregt, und der Schaltkontakt 120 schließt den Batteriestromkreis über den Wandler 13. Gleichzeitig oder unmittelbar danach schließen die Schaltkontakte 35, 36 den Heizstromkreis, der von der positiven Klemme der Heizspannungsquelle UH über den Schaltkontakt 35, einen Vorwiderstand 38, den als Kontaktbrücke ausgebildeten Anschluß 32, den leuchtenseitigen Anschluß 24, den Verbindungspunkt 26 zu der zu heizenden Kathode 110, den Anschluß 23, den geräteseitigen Gegenanschluß 33 und den Schaltkontakt 36 zum negativen Pol der Heizspannung UH verläuft. Nach einer geeigneten Vorheizphase schließt auch der Schalter bzw. Schaltkontakt 37 und triggert eine Zündeinrichtung 39. Die Zündeinrichtung 39 legt über eine Kontaktbrücke am Anschluß 32 eine geeignete Zündspannung an die Anode 111 der Leuchtstofflampe 11 an, mit der Folge, daß die Lampe 11 zündet. Die Betriebsspannung liegt, gespeist aus der Batterie 10, zwischen der vorgeheizten Kathode 110 und der Anode 111 an, so daß die Lampe eingeschaltet bleibt, wenn in der letzten Phase der mechanischen Entkupplung der Leuchte 1 auch die elektrische Trennung von dem Ladegerät erfolgt.The circuit of the lamp 1 is coupled via the connections 22, 23 and 24 and the counter connections 32, 33 to the heating and ignition circuits in the charger. During the charging phase of the battery 10, the switches or switching contacts 35, 36 and 37 designed as openers are opened, so that the connections 32 and 33 and the counter connections of the lamp 1 are de-energized. When the lamp 1 is removed, ie at the end of the charging phase in the charger, the switch 34 is first opened; the switching device 12 shown as a relay is de-energized, and the switching contact 120 closes the battery circuit via the converter 13. Simultaneously or immediately thereafter, the switching contacts 35, 36 close the heating circuit, which is a series resistor from the positive terminal of the heating voltage source U H via the switching contact 35 38, the connection 32 designed as a contact bridge, the light-side connection 24, the connection point 26 to the cathode 110 to be heated, the connection 23, the device-side counter-connection 33 and the switching contact 36 to the negative pole of the heating voltage U H. After a suitable preheating phase, the switch or switching contact 37 also closes and triggers an ignition device 39. The ignition device 39 applies a suitable ignition voltage to the anode 111 of the fluorescent lamp 11 via a contact bridge at the connection 32, with the result that the lamp 11 ignites. The operating voltage is fed from the battery 10, between the preheated cathode 110 and the anode 111, so that the lamp remains on when, in the last phase of the mechanical decoupling of the lamp 1, there is also electrical separation from the charger.

Die Heizspannung UH kann von der Ladespannung UL abweichen; kann jedoch auch mit dieser übereinstimmen. In diesem Falle sind die Anschlußkammern von UL und UH zusammengeschaltet.The heating voltage U H can deviate from the charging voltage U L ; however, can also match this. In this case, the connection chambers of U L and U H are interconnected.

Eine etwa vorgesehene leuchteneigene Zündspannungseinrichtung zum Kaltstarten der Lampe 11 sollte zwichen die Anschlüsse 22 und 23 eingebunden werden.Any provided lighting ignition device for cold starting the lamp 11 should be integrated between the connections 22 and 23.

In Fig. 2 ist eine elektronische Schalteinrichtung in Ersatz der Relaisanordnung 12, 120 der Fig. 1 gezeigt. Diese elektronische Schalteinrichtung hat zwei Transistoren T1 und T2, von denen T2 die Funktion des Öffners 120 erfüllt. Bei Batteriebetrieb ist T1 gesperrt, die Basis des Transistors T2 liegt über den Widerstand R2 auf relativ hohem Potential und macht die Kollektor-Emitterstrecke von T1 leitend. Die Entkopplungsdiode 25 verhindert einen Stromfluß von dem positiven Pol der Batterie über den Widerstand R1 zur Basis von T1. Während der Batterie-Ladephase ist der Schalter 34 geschlossen; die Batterie 10 wird über die Diode 25 aufgeladen. Das Potential der Basis des Transistors T1 wird über R1 angehoben, wodurch T1 leitend wird und die Basis von T2 auf das negative Potential herunterzieht. Die Folge ist ein Sperren von T2, d.h. die Unterbrechung des Versorungsstromkreises der Lampe 11 in Fig. 1FIG. 2 shows an electronic switching device to replace the relay arrangement 12, 120 in FIG. 1. This electronic switching device has two transistors T1 and T2, of which T2 performs the function of the break contact 120. T1 is blocked during battery operation, the base of transistor T2 is at a relatively high potential via resistor R2 and makes the collector-emitter path of T1 conductive. The decoupling diode 25 prevents current flow from the positive pole of the battery through the resistor R1 to the base of T1. During the battery charging phase, switch 34 is closed; the battery 10 is charged via the diode 25. The potential of the base of transistor T1 is raised above R1, making T1 conductive and pulling the base of T2 down to the negative potential. The consequence is a blocking of T2, i.e. the interruption of the lamp 11 supply circuit in FIG. 1

Fig. 3 zeigt eine Wendeleuchte, die ebenfalls als Kopfleuchte oder aber als anderweitig tragbare Leuchte ausgebildet sein kann. Die Wendeleuchte weist ein Gehäuse 40 auf, das in einer Gabel 41 gelagert ist, und zwar schwenkbar um eine horizontale, senkrecht zur Zeichenebene verlaufende Achse. Die Gabel 41 ist drehbar gelagert oder aber in umkehrbarer Orientierung auf einem Grubenhelm befestigbar.Fig. 3 shows a reversible lamp, which can also be designed as a head lamp or as a portable lamp. The reversible lamp has a housing 40 which is mounted in a fork 41 and can be pivoted about a horizontal axis running perpendicular to the plane of the drawing. The fork 41 is rotatably mounted or can be fastened in a reversible orientation on a pit helmet.

Das Gehäuse 40 ist rohrförmig ausgebildet und trägt an seinem einen Ende die Leuchtstofflampe 11 und an seinem entgegengesetzten Ende die Glühlampe 18. Der Leuchtstofflampe 11 ist ein relativ flacher Reflektor 42 zugeordne, während sich die Glühlampe 18 in einem stärker gekrümmten Reflektor 43 befindet. Letzterer ist zur Fokussierung in Axialrichtung verschiebbar.The housing 40 is tubular and carries on it The fluorescent lamp 11 at one end and the incandescent lamp 18 at its opposite end. The fluorescent lamp 11 is assigned a relatively flat reflector 42, while the incandescent lamp 18 is located in a more curved reflector 43. The latter can be moved in the axial direction for focusing.

Im Rahmen des Erfindungsgedankens sind zahlreiche Abwandlungen möglich. So kann anstelle der beschriebenen Kopplung zwischen den mechanischen und elektrischen Anschlußkomponenten von Leuchte und Ladgerät auch eine selektive Betätigung der Schaltfolge von Lade-, Heiz- und oder Zündstromkreisen vorgesehen sein. Auch können die Schaltphasen mit Hilfe eines geeigneten Schaltwerks einstellbar gemacht und entweder automatisch oder selektiv betätigbar sein. Wesentlich ist die Integrierung aller für eine sogenannte weiche Zündung einer Leuchtstofflampe erforderlichen elektrischen Komponenten in das Ladegerät bzw. deren Zuordnung zum Ladegerät, so daß die Leuchtstofflampe bei der Entnahme der Leuchte aus dem Entnahmegerät zuverlässig gezündet und eingeschaltet wird. Der Unterstromwächter 14 sollte vorzugsweise erst zeitverzögert wirksam sein, damit verhindert wird, daß der Hilfsstromkreis über die Glühlampe 18 vor dem Zünden der Leuchtstofflampe 11 geschlossen wird. Der Dimmer dient der Verstellung des Lichtstromes. Er kann selbstverständlich entfallen. In den Hilfsstromzweig zur Glühlampe 18 kann man in der Praxis einen geeigneten Vorwiderstand einschalten, um die Glühlampen-Betriebsspannung der Spannung am Ausgang des Wandlers 13 anzupassen. Die Konfiguration und Zeitfolge der Schalter bzw. Schaltkontakte 35 und 36 bzw. 37 zur Betätigung der Heiz- und Zündstromkreise kann in vielfacher Weise abgewandelt werden. Insofern ist die in Fig. 1 dargestellte Schaltungsanordnung nur als eine denbkare Alternative zur Durchführung des erfindungsegmäßen Verfahrens anzusehen.Numerous modifications are possible within the scope of the inventive concept. Thus, instead of the coupling described between the mechanical and electrical connection components of the lamp and charger, a selective actuation of the switching sequence of charging, heating and or ignition circuits can also be provided. The switching phases can also be made adjustable with the aid of a suitable switching mechanism and can be operated either automatically or selectively. It is essential to integrate all the electrical components required for a so-called soft ignition of a fluorescent lamp into the charger or to assign them to the charger, so that the fluorescent lamp is reliably ignited and switched on when the lamp is removed from the removal device. The undercurrent monitor 14 should preferably only be effective with a time delay so that the auxiliary circuit is prevented from being closed via the incandescent lamp 18 before the fluorescent lamp 11 is ignited. The dimmer is used to adjust the luminous flux. Of course, it can be omitted. In practice, a suitable series resistor can be switched into the auxiliary current branch to the incandescent lamp 18 in order to adapt the incandescent lamp operating voltage to the voltage at the output of the converter 13. The configuration and timing of the switches or switching contacts 35 and 36 or 37 for actuating the heating and ignition circuits can be modified in many ways. In this respect, the circuit arrangement shown in FIG. 1 is only to be regarded as a viable alternative for carrying out the method according to the invention.

Die Wendelampe gemäß Fig. 3 kann ferner so ausgebildet sein, daß das Gehäuse eine einzige Lichtaustrittsöffnung aufweist, wobei die beiden Lichtquellen mit ihren Reflektoren nach Bedarf vor diese Öffnung schiebbar oder schwenkbar sind. Dementsprechend kann sich die äußere Form des Gehäuses ändern Zur Fokussierung kann die Glühlampe 18 anstelle des Reflektors 43 oder zusätzlich zu diesem verschiebbar sein. Auch kommt der Einsatz einer 2-Faden-Glühlampe in Frage. Schließlich besteht die Möglichkeit, auch die Leuchtstofflampe 11 - allerdings in beschränktem Umfang - fokussierbar zu machen. Im übrigen können die Glühlampe und die Leuchtstofflampe auch mit einem gemeinsamen Reflektor zusammenarbeiten.3 can also be designed so that the housing has a single light exit opening, the two light sources with their reflectors behind Can be pushed or swiveled in front of this opening. Accordingly, the outer shape of the housing can change. For focusing, the incandescent lamp 18 can be displaceable instead of or in addition to the reflector 43. The use of a 2-filament light bulb is also an option. Finally, it is also possible to make the fluorescent lamp 11 focusable, albeit to a limited extent. Otherwise, the incandescent lamp and the fluorescent lamp can also work together with a common reflector.

Claims (10)

  1. Method of operating a portable lamp in spaces subject to the risk of explosion, particularly a cap lamp (1) in mine operations, whereby a light source is powered from a rechargeable battery (10) carried by the user and the battery is coupled to a charging device outside the space subject to the risk of explosion and recharged, characterised in that a low-pressure gas discharge bulb with a heatable cathode is used as the light source, that at the beginning of the recharging phase the lamp is extinguished, that at the end of the recharging phase a heating voltage is made available from the charging device and applied to the cathode (110) of the gas discharge bulb (11), that the bulb is connected to the battery circuit, that thereafter a striking voltage is generated by the charging device which is applied to the bulb electrodes (110,111) whereby the bulb is lit before the lamp is electrically decoupled from the charging device.
  2. Method as claimed in claim 1, characterised in that the interruption of the charging voltage, the application of the heating voltage and the application of the striking voltage are effected synchronously and in a fixed phase relationship with the mechanical decoupling step between the lamp (1) and charging device, whereby the heating voltage is preferably derived from the charging voltage of the charging device.
  3. Method as claimed in claim 1 or 2, characterised in that the current flowing in the current supply circuit (14...17) of the bulb (11) after it has been lit is monitored and a parallel circuit including a glow lamp (18) which is powered by the battery (10), is closed - preferably with a time delay - after the current has fallen below a threshold current value.
  4. System for operating a portable lamp (1) in spaces subject to the risk of explosion, particularly a cap lamp in mine operations, with at least one light source, a rechargeable battery (10) for supplying power to the light source and a charging device arranged outside the space subject to the risk of explosion to which the portable lamp may be coupled for recharging the battery, characterised in that the at least one light source is a low-pressure gas discharge bulb (11) with a heatable cathode and that associated with the charging device are a heating voltage supply (UH,35,38,32,33,36) and a striking voltage device (39) which are selectively connectable to the bulb (11) by means of a coupling device.
  5. System as claimed in claim 4, characterised in that a switching device (12), which interrupts the bulb power supply circuit (120,13), is connected to the charging current circuit (20,25,21) and may be activated by the charging voltage (UL).
  6. System as claimed in claim 4 or 5, characterised in that the lamp connections (22,24,23) for coupling the heating and striking voltages (UH and UZ) to the bulb electrodes (110,111) are provided separated from the battery charging connections (20,31), whereby a second switching device with separate switches (35,36,37) is preferably incorporated in the heating and striking circuits and is so constructed that the striking circuit (39,32,22,111,110,23,33) may be activated with a phase shift after the heating circuit (35,38,32,24,26,110, 23,33,36) and whereby further the first and second switching devices (12,35,36,37) are preferably coupled together and are placed in a predetermined switching phase relationship.
  7. System as claimed in one of claims 4 to 6, characterised in that at least one of the switching devices has a switching cam mechanically coupled to the coupling device for switch actuation, whereby the coupling device is preferably constructed as a rotary or bayonet coupling and at least two switches or switch contacts are actuable in different rotary positions of the coupling.
  8. System as claimed in one of claims 4 to 7, characterised in that a low current tripping device (14) is incorporated in the operating circuit of the gas discharge bulb (11) and so constructed that it connects a circuit including a glow lamp (11) to the battery after the current falls below a threshold current value, preferably with a predetermined time delay.
  9. System as claimed in one of claims 4 to 8, characterised in that means (25) for electrically decoupling the first switching device (12) from the battery circuit (10,120,13) and preferably means (17) for electrically decoupling the heating and striking circuits from the battery circuit are provided, whereby further the decoupling means preferably comprise diodes (25,17).
  10. System as claimed in one of claims 4 to 9, characterised in that a second light source (11) constructed as a glow lamp (18) is provided in addition to the gas discharge bulb (11), that a separate reflector (42,43) is associated with each of the two light sources (11,18) and that at least the glow lamp (18) is focusable.
EP90120310A 1989-11-04 1990-10-23 System for operating a portable lamp Expired - Lifetime EP0427042B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3936809 1989-11-04
DE3936809A DE3936809C1 (en) 1989-11-04 1989-11-04

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EP0427042A2 EP0427042A2 (en) 1991-05-15
EP0427042A3 EP0427042A3 (en) 1992-05-27
EP0427042B1 true EP0427042B1 (en) 1994-12-21

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EP90120310A Expired - Lifetime EP0427042B1 (en) 1989-11-04 1990-10-23 System for operating a portable lamp

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US (1) US5107180A (en)
EP (1) EP0427042B1 (en)
AU (1) AU636922B2 (en)
CA (1) CA2028886A1 (en)
DE (2) DE3936809C1 (en)
ES (1) ES2067619T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6316911B1 (en) 1997-08-08 2001-11-13 Black & Decker Inc. Battery and flashlight recharger
US7446086B2 (en) 2003-08-19 2008-11-04 Henkel Kommanditgesellschaft Auf Aktien Agents that are absorbed on the surfaces of substrates

Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
US5214353A (en) * 1989-09-22 1993-05-25 Nilssen Ole K Flashlight with boost feature
CN100381748C (en) * 2004-02-09 2008-04-16 山西光宇电源有限公司 Semiconductor mining cap lamp having a charging-discharging control and protection system
US7400095B2 (en) * 2005-11-16 2008-07-15 Ellenberger & Poensgen Gmbh Portable electric lighting fixture
FR2991027A1 (en) * 2012-05-25 2013-11-29 Zedel PORTABLE ELECTRIC LAMP WITH CURRENT LIMITATION DEVICE

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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
US3953768A (en) * 1970-12-23 1976-04-27 Meredith Ronald D Portable fluorescent lamp and inverter therefor
US3869640A (en) * 1973-07-09 1975-03-04 Taras Avenir Kolomyjec Power supply arrangement for fluorescent tubes, thermionic devices and the like
US4225906A (en) * 1978-03-16 1980-09-30 Koehler Manufacturing Company Luminaire apparatus with multiple light sources and methods of operating same
US4399492A (en) * 1980-12-08 1983-08-16 Ocenco Incorporated Incandescent and fluorescent caplight device
DE3100177A1 (en) * 1981-01-07 1982-08-05 Philips Patentverwaltung Gmbh, 2000 Hamburg Circuit arrangement for igniting and operating a low-pressure discharge lamp from a direct current source
DE3736618A1 (en) * 1987-10-29 1989-05-11 Ceag Licht & Strom LUMINAIRE WITH A TRANSPARENT COVER TUB AND A LUMINAIRE BASE CONNECTED TO IT

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6316911B1 (en) 1997-08-08 2001-11-13 Black & Decker Inc. Battery and flashlight recharger
US7446086B2 (en) 2003-08-19 2008-11-04 Henkel Kommanditgesellschaft Auf Aktien Agents that are absorbed on the surfaces of substrates

Also Published As

Publication number Publication date
US5107180A (en) 1992-04-21
ES2067619T3 (en) 1995-04-01
AU636922B2 (en) 1993-05-13
AU6567690A (en) 1991-05-09
DE3936809C1 (en) 1991-02-21
EP0427042A3 (en) 1992-05-27
DE59008078D1 (en) 1995-02-02
CA2028886A1 (en) 1991-05-05
EP0427042A2 (en) 1991-05-15

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