JP2582704B2 - Light-out prevention device for railway signals - Google Patents
Light-out prevention device for railway signalsInfo
- Publication number
- JP2582704B2 JP2582704B2 JP4157463A JP15746392A JP2582704B2 JP 2582704 B2 JP2582704 B2 JP 2582704B2 JP 4157463 A JP4157463 A JP 4157463A JP 15746392 A JP15746392 A JP 15746392A JP 2582704 B2 JP2582704 B2 JP 2582704B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- relay
- signal
- signal control
- power supply
- 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
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- Stand-By Power Supply Arrangements (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、鉄道信号機の滅灯によ
る列車運行上の支障を防止する鉄道信号の滅灯防止装置
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing a traffic light from being extinguished, which prevents troubles in train operation due to the extinguishing of a traffic light.
【０００２】[0002]
【従来の技術】鉄道信号機は、信号保安装置の一つとし
て、列車を防護し、更に積極的に輸送能率を向上するた
めの設備であり、安全性を確保すること、言い換えると
高信頼性はもとより、例え故障が生じても、また、取扱
いを誤っても安全側になること（フェールセーフ）が強
く要求される。2. Description of the Related Art Railway traffic signals are equipment for protecting trains and actively improving transportation efficiency as one of the signal security devices. Ensuring safety, in other words, high reliability, is essential. Needless to say, it is strongly required that even if a failure occurs, or even if the handling is erroneous, it be on the safe side (fail safe).
【０００３】色灯式信号機は、灯の色によって信号を現
示し、自動の信号区間に用いられる信号機であり、多灯
形色灯式信号機には、３現示，４現示，５現示のものが
あり、いずれも単一の灯器の組合せで垂直に並べたもの
である。[0003] The color lamp type traffic light is a traffic light which indicates a signal according to the color of the light and is used in an automatic signal section. A multi-light type color light traffic light has three, four and five indications. Are all arranged vertically in a single lamp combination.
【０００４】三位式３現示色灯式信号機では赤色（停止
灯）Ｒ，橙黄色（注意灯）Ｙ，緑色（進行灯）Ｇを単独
に現示するのが普通である。仮に、色灯式信号機が滅灯
となったときには、列車は、原則的にその信号区間に進
入することができず、信号区間の手前で停止していなけ
ればならない。[0004] In a three-position three-present color light type traffic light, it is common to independently present red (stop light) R, orange-yellow (caution light) Y, and green (progressive light) G. If the colored light signal goes out, the train cannot enter the signal section in principle and must stop before the signal section.
【０００５】従来信号機の滅灯による現示不能の事態を
避けるため、信号電球にはダブルフィラメント電球を用
い、一方のフィラメントが断芯（片断芯）したときの通
電電流を検知して全断芯となる前に電球を交換すること
によって対処するほか、予め信号電球の使用限度を定め
て新品ととり替え、また、とり替えに際しては、停止灯
を優先して停止灯に新品を使用し、進行灯，注意灯の順
に電球を交換して断芯による滅灯を未然に防止する対策
が講じられていた。[0005] In order to avoid a situation where the signal cannot be displayed due to the extinguishing of the conventional traffic light, a double filament light bulb is used as the signal bulb, and the current flowing when one of the filaments is cut off (single cut) is detected and the entire cut off is detected. In addition to coping with this by replacing the light bulb before reaching the limit, the use limit of the signal light bulb is set in advance and replaced with a new one. Measures were taken to prevent the extinguishing of the lamp by replacing the bulb in the order of the lamp and the cautionary lamp.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、どのよ
うな対策を講じたところで、全断芯の発生は可能性とし
て物理的に避けることができない。信号電球の全断芯
は、停止灯，進行灯，注意灯のいずれにも生ずる可能性
があるが、列車の運行上支障を来すのは進行灯の滅灯で
ある。その理由は、信号区間への列車の進入が許可され
ているにもかかわらず、列車を停止させていなければな
らないからである。However, no matter what countermeasures are taken, the occurrence of total core breakage cannot be physically avoided as a possibility. The total decentering of the signal light bulb can occur in any of the stop light, the progress light, and the caution light, but it is the extinguishment of the progress light that hinders the operation of the train. The reason is that the train must be stopped even though the train is allowed to enter the signal section.
【０００７】このような異常事態が発生したときには、
最寄り駅の係員などが安全を確認し、ポイントのレール
等を完全に固定して手信号で列車を運行させることにな
る。このような措置が講じられない限り列車を進行させ
ることができない。したがって、一旦信号機の進行灯Ｇ
が滅灯になると、大巾な列車ダイヤの乱れが生じ、列車
の遅延は避けられない。When such an abnormal situation occurs,
The staff at the nearest station will confirm the safety, and the rail at the point will be completely fixed and the train will be operated by hand signal. The train cannot proceed unless such measures are taken. Therefore, once the traffic light G
When lights go out, a large train schedule disruption occurs and train delays are inevitable.
【０００８】本発明の目的は、進行灯の滅灯の際にも少
なくとも注意運転による列車の走行を可能とする鉄道信
号の滅灯防止装置を提供することにある。It is an object of the present invention to provide a railway signal extinguishing prevention device which enables a train to be driven by at least cautionary driving even when a traveling light is extinguished.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するた
め、本発明による鉄道信号の滅灯防止装置においては、
信号制御回路（１）に付設された滅灯防止回路（２）を
有する鉄道信号の滅灯防止装置であって、信号制御回路
（１）は、２つの信号制御リレー（ＨＲ），（ＤＲ）の
切替により進行灯（Ｇ），注意灯（Ｙ），停止灯（Ｒ）
の現示制御を行うものであり、各灯（Ｇ），（Ｙ），
（Ｒ）は交流電源からの通電によって点灯し、信号電球
断芯検出器（Ｆｉｄ）を有し、進行灯（Ｇ）は、その電
源配線に結線された信号制御リレー（ＨＲ）の扛上接点
（ＨＲ1）と、信号制御リレー（ＤＲ）の扛上接点（Ｄ
Ｒ1）を通じて給電され、注意灯（Ｙ）は、その電源配
線に接続された信号制御リレー（ＨＲ）の扛上接点（Ｈ
Ｒ 1 ）と、信号制御リレー（ＤＲ）の落下接点（ＤＲ2）
を通じて給電され、停止灯（Ｒ）は、その電源配線に接
続された信号制御リレー（ＨＲ）の落下接点（ＨＲ 2 ）
を通じて給電され、信号電球断芯検出器（Ｆｉｄ）は、
進行灯（Ｇ），注意灯（Ｙ），停止灯（Ｒ）のいずれか
一つの信号電球が片断芯又は全断芯したときの電流変化
を検知する回路であり、滅灯防止回路（２）は、電圧検
知リレー（ＶＲ）と、電流検知リレー（ＩＲ）と、切替
用配線（３）を有し、電圧検知リレー（ＶＲ）は、進行
灯（Ｇ）の両端電圧を検知して動作するリレーであり、
電流検知リレー（ＩＲ）は、進行灯（Ｇ）への通電電流
を検知して動作するリレーであり、切替用配線（３）
は、進行灯（Ｇ）の電源配線と、注意灯（Ｙ）の電源配
線間に結線され、電圧検知リレー（ＶＲ）の扛上接点
（ＶＲ1）と、電流検知リレー（ＩＲ）の落下接点（Ｉ
Ｒ2）を通じて給電され、半波整流器（４）は、切替用
配線（３）を通じて注意灯（Ｙ）に半波整流電流を通電
するものである。In order to achieve the above object, the present invention provides a railway signal extinguishing device according to the present invention.
A light extinguishing prevention device for a railway signal having a light extinguishing circuit (2) attached to a signal control circuit (1), wherein the signal control circuit (1) comprises two signal control relays (HR) and (DR) By switching the progress light (G), caution light (Y), stop light (R)
Of the lights (G), (Y),
(R) is lit by energization from an AC power supply, has a signal bulb disconnection detector (Fid), and the traveling light (G) is a lifting contact of a signal control relay (HR) connected to the power supply wiring. (HR 1 ) and the lifting contact (D) of the signal control relay (DR)
R 1 ), and the caution light (Y) is connected to its power supply wiring by a lifting contact (H ) of a signal control relay (HR).
R 1 ) and the drop contact (DR 2 ) of the signal control relay (DR)
And the stop light (R) is connected to its power supply wiring and the falling contact (HR 2 ) of the signal control relay (HR) is connected.
And the signal bulb disconnection detector (Fid)
A circuit for detecting a change in current when one of the signal bulbs of the traveling light (G), the caution light (Y), and the stop light (R) is partially or completely cut off, and a light-extinguishing prevention circuit (2) Has a voltage detection relay (VR), a current detection relay (IR), and a switching wiring (3). The voltage detection relay (VR) operates by detecting a voltage between both ends of the traveling light (G). A relay,
The current detection relay (IR) is a relay that operates by detecting a current supplied to the traveling light (G), and is a switching wiring (3).
Is connected between the power supply wiring of the traveling light (G) and the power supply wiring of the caution light (Y). The lifting contact (VR 1 ) of the voltage detection relay (VR) and the falling contact of the current detection relay (IR). (I
R 2 ), and the half-wave rectifier (4) supplies a half-wave rectified current to the caution light (Y) through the switching wiring (3).
【００１０】[0010]
【作用】進行灯への通電時には、電圧検知リレー及び電
流検知リレーのいずれもが扛上し、いずれも接点が扛上
となって切替用配線は開放されている。進行灯への通電
時に、進行灯が全断芯したときには、電流検知リレーが
落下し、その落下接点と電圧検知リレーの扛上接点を通
じて切替用配線に通電される。切替用配線に設けられた
半波整流器は、交流電源電流を整流し、注意灯は、半波
整流電流によって点灯し、本来の全波電流による点灯と
は区別される。また、半波整流電流による通電電流の減
少は、信号電球断芯検知器に検知される。なお、注意灯
に正規に通電されてこれが点灯するときには、電圧検知
リレーは落下しているため、その扛上接点が落下し、進
行灯には通電されない。When power is supplied to the traveling light, both the voltage detection relay and the current detection relay are lifted, the contacts are lifted, and the switching wiring is open. When the traveling lamp is completely energized when the traveling lamp is energized, the current detection relay falls, and the switching wiring is energized through the falling contact and the lifting contact of the voltage detection relay. Provided for switching wiring
The half-wave rectifier rectifies the AC power supply current,
Lighting by rectified current, lighting by original full-wave current
Are distinguished. Further, a decrease in the conduction current due to the half-wave rectified current is detected by the signal bulb disconnection detector. When the caution light is properly energized and turned on, the voltage detection relay is falling, so that the lifting contact falls and the traveling light is not energized.
【００１１】[0011]
【実施例】以下に本発明の実施例を図によって説明す
る。図１において、本発明による鉄道信号の滅灯防止装
置は、信号制御回路１に付設したものである。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, a railway signal extinguishment prevention device according to the present invention is added to a signal control circuit 1.
【００１２】信号制御回路１は、信号機器箱に内蔵され
た既設の回路であり、２つの信号制御リレーＨＲ，ＤＲ
の切替により、進行灯Ｇ，注意灯Ｙ，停止灯Ｒの現示制
御が行われる。すなわち、進行灯Ｇの現示は、その電源
配線に結線された信号制御リレーＨＲの扛上接点ＨＲ1
と、信号制御リレーＤＲの扛上接点ＤＲ1を通じて通電
され、注意灯Ｙには、信号制御リレーＨＲの扛上接点Ｈ
Ｒ1と、信号制御リレーＤＲの落下接点ＤＲ2を通じて、
さらに停止灯Ｒは、信号制御リレーＨＲの落下接点ＨＲ
2を通じてそれぞれ点灯するように電源回路が構成され
ている。各灯Ｇ，Ｙ，Ｒは、交流電源からの通電によっ
て点灯する。The signal control circuit 1 is an existing circuit built in the signal equipment box, and includes two signal control relays HR and DR.
, The present light control of the traveling light G, the caution light Y, and the stop light R is performed. That is, the display of the traveling light G is indicated by the lifting contact HR 1 of the signal control relay HR connected to the power supply wiring.
When being energized through jacked contact DR 1 signal control relay DR, the caution light Y, jack up the contacts H signal control relay HR
R 1 and the falling contact DR 2 of the signal control relay DR,
Further, the stop light R is provided by the falling contact HR of the signal control relay HR.
The power supply circuit is configured so as to light each through 2 . Each of the lamps G, Y, and R is turned on by energization from an AC power supply.
【００１３】なお、図中、Ｆｉｄは、信号電球断芯検出
器である。信号電球断芯検出器Ｆｉｄは、進行灯Ｇ，注
意灯Ｙ，停止灯Ｒのいずれか１つの信号電球が片断芯又
は全断芯したときの電流変化を検知する回路である。検
知信号は、監視室内で集中管理される。In the drawing, Fid is a signal bulb disconnection detector. The signal light bulb deficiency detector Fid is a circuit that detects a change in current when one of the signal light bulbs of the traveling light G, the caution light Y, and the stop light R is singly or completely deficient. The detection signal is centrally managed in the monitoring room.
【００１４】本発明による滅灯防止回路２は、電圧検知
リレーＶＲと、電流検知リレーＩＲとを有し、進行灯Ｇ
の電源配線と、注意灯Ｙの電源配線間に切替用配線を結
線し、両リレーの接点を該切替用配線３に直列に接続し
たものである。The light extinguishing circuit 2 according to the present invention has a voltage detection relay VR and a current detection relay IR.
And a switching wire is connected between the power wire of the warning light Y and the power wire of the caution light Y, and the contacts of both relays are connected in series to the switching wire 3.
【００１５】電圧検知リレーＶＲは、進行灯Ｇの両端電
圧を検知して動作するリレーであり、電圧検知トランス
Ｔ1と整流回路Ｄ1とを介して進行灯Ｇの電源回路配線と
並列に結線されている。電流検知リレーＩＲは、進行灯
Ｇへの通電電流を検知して動作するリレーであり、進行
灯Ｇの電源配線に直列に接続された電流検知トランスＴ
2の出力側に、整流器Ｄ2を介して接続されている。The voltage detection relay VR is a relay that operates by detecting the voltage between both ends of the traveling light G, and is connected in parallel with the power supply circuit wiring of the traveling light G via the voltage detection transformer T 1 and the rectifier circuit D 1. Have been. The current detection relay IR is a relay that operates by detecting a current supplied to the traveling light G, and is a current detection transformer T connected in series to the power supply wiring of the traveling light G.
2 on the output side, are connected via the rectifier D 2.
【００１６】切替用配線３には、電圧検知リレーＶＲと
電流検知リレーＩＲの接点と半波整流器４とが直列に接
続され、電圧検知リレーＶＲの扛上接点ＶＲ 1 と、電流
検知リレーＩＲの落下接点ＩＲ 1 を通じて進行灯Ｇの電
源配線から通電され、半波整流器４によって整流された
半波整流電流を注意灯Ｙに給電する。 The switching wiring 3 is connected in series with the contacts of the voltage detection relay VR and the current detection relay IR and the half-wave rectifier 4.
Is continued, the jacked contact VR 1 voltage sensing relay VR, the current
Electrostatic advanced lamp G through drop contacts IR 1 detection relay IR
Power was supplied from the source wiring and rectified by the half-wave rectifier 4.
The half-wave rectified current is supplied to the caution light Y.
【００１７】実施例において、進行灯Ｇの信号電球が全
断芯とならない限り、進行灯Ｇへの通電時には両リレー
ＶＲ，ＩＲが扛上し、電流検知リレーＩＲの落下接点Ｉ
Ｒ1が扛上して切替用配線３を開放するため、進行灯Ｇ
への通電電流によって注意灯Ｙが点灯現示にはならな
い。In the embodiment, as long as the signal bulb of the traveling light G is not completely decentered, when the traveling light G is energized, both the relays VR and IR are lifted, and the falling contact I of the current detection relay IR.
Since R 1 opens the switching wires 3 and jacked progressive lamp G
The warning light Y does not become a lighting indication due to the current supplied to the lamp.
【００１８】進行灯Ｇの信号電流が全断芯したときに
は、進行灯Ｇは滅灯となるが、進行灯Ｇへの通電が断た
れて電流検知リレーＩＲが落下となり、進行灯Ｇへの通
電電流は、切替用配線３を通して注意灯Ｙに通電され、
注意灯Ｙが点灯して注意信号現示となる。注意灯Ｙの点
灯は、半波整流器４を通して通電される半波整流電流に
よるため、通常の点灯に比べて輝度（光力）は減少する
が、実用上は差支えない。列車の運転士は、半波整流電
流による注意灯Ｙの点灯を目視して注意運転で走行す
る。When the signal current of the traveling light G is completely disconnected, the traveling light G is extinguished. However, the power supply to the traveling light G is cut off and the current detection relay IR falls. The current is supplied to the caution light Y through the switching wiring 3,
The caution light Y is turned on to indicate the caution signal. Since the lighting of the caution lamp Y is based on a half-wave rectified current supplied through the half-wave rectifier 4, the luminance (light power) is reduced as compared with the normal lighting, but it does not matter in practical use. The train driver runs with caution while watching the lighting of the caution lamp Y by the half-wave rectified current.
【００１９】なお、半波整流器４は、本発明による滅灯
防止装置の機能には、無関係であるが、進行灯Ｇの断芯
時に、進行灯Ｇへ通電すべき電流をそのまま注意灯Ｙの
配線に流して注意灯Ｙを点灯させたのでは、断芯による
電流変化が生ぜず、したがって、信号電球断芯検出器Ｆ
ｉｄには、検知信号が得られないため、本発明では、半
波整流器４を用いて進行灯全断芯時の注意灯Ｙの点灯を
正常点灯時の半分の電流で点灯するようにしたものであ
る。この通電電流の減少は、信号電球断芯検出器Ｆｉｄ
に検知され、異常発生が報知される。The half-wave rectifier 4 is irrelevant to the function of the extinguishing light prevention device according to the present invention. If the caution lamp Y is turned on by flowing the wiring, the current change due to the disconnection does not occur, and therefore, the signal bulb disconnection detector F
Since no detection signal is obtained for the id, the present invention uses the half-wave rectifier 4 to turn on the caution lamp Y when the traveling lamp is completely disconnected with half the current of normal lighting. It is. This decrease in the conduction current is caused by the signal bulb disconnection detector Fid.
Is detected, and the occurrence of an abnormality is notified.
【００２０】[0020]
【発明の効果】以上のように本発明によるときには、進
行灯全断芯による異常事態が発生しても注意灯の点灯に
自動的に切替えるため、列車停止による列車遅れ，列車
ダイヤの乱れによる混乱を未然に防止することができ、
あわせて駅係員の手数をなくすことができる。As described above, according to the present invention, even if an abnormal situation occurs due to the complete disconnection of the traveling light, the warning light is automatically switched to the lighting of the caution light. Can be prevented beforehand,
In addition, the time and effort of station staff can be eliminated.
【００２１】また、本発明装置は、既設の信号配線に付
設するのみでよく、回路構成が簡単なため、信号機の機
筐内に現場工事で容易に組込むことができる。Further, the device of the present invention only needs to be attached to the existing signal wiring, and has a simple circuit configuration, so that it can be easily installed in a signal device housing by on-site construction.
【図１】本発明装置の一実施例を示す回路図である。FIG. 1 is a circuit diagram showing one embodiment of the device of the present invention.
１ 信号制御回路 ２ 滅灯防止回路 ３ 切替用配線 ４ 半波整流器 ＨＲ，ＤＲ 信号制御リレー ＶＲ 電圧検知リレー ＩＲ 電流検知リレー ＶＲ1 電圧検知リレーの扛上接点 ＩＲ1 電流検知リレーの落下接点 Ｇ 進行灯 Ｙ 注意灯 Ｒ 停止灯 Ｆｉｄ 信号電球断芯検出器Reference Signs List 1 signal control circuit 2 extinguishing prevention circuit 3 switching wiring 4 half-wave rectifier HR, DR signal control relay VR voltage detection relay IR current detection relay VR 1 voltage detection relay lifting contact IR 1 current detection relay drop contact G progress Light Y Caution light R Stop light Fid Signal bulb disconnection detector
Claims (1)
止回路（２）を有する鉄道信号の滅灯防止装置であっ
て、 信号制御回路（１）は、２つの信号制御リレー（Ｈ
Ｒ），（ＤＲ）の切替により進行灯（Ｇ），注意灯
（Ｙ），停止灯（Ｒ）の現示制御を行うものであり、各
灯（Ｇ），（Ｙ），（Ｒ）は交流電源からの通電によっ
て点灯し、信号電球断芯検出器（Ｆｉｄ）を有し、 進行灯（Ｇ）は、その電源配線に結線された信号制御リ
レー（ＨＲ）の扛上接点（ＨＲ1）と、信号制御リレー
（ＤＲ）の扛上接点（ＤＲ1）を通じて給電され、 注意灯（Ｙ）は、その電源配線に接続された信号制御リ
レー（ＨＲ）の扛上接点（ＨＲ 1 ）と、信号制御リレー
（ＤＲ）の落下接点（ＤＲ2）を通じて給電され、 停止灯（Ｒ）は、その電源配線に接続された信号制御リ
レー（ＨＲ）の落下接点（ＨＲ 2 ）を通じて給電され、 信号電球断芯検出器（Ｆｉｄ）は、進行灯（Ｇ），注意
灯（Ｙ），停止灯（Ｒ）のいずれか一つの信号電球が片
断芯又は全断芯したときの電流変化を検知する回路であ
り、 滅灯防止回路（２）は、電圧検知リレー（ＶＲ）と、電
流検知リレー（ＩＲ）と、切替用配線（３）を有し、 電圧検知リレー（ＶＲ）は、進行灯（Ｇ）の両端電圧を
検知して動作するリレーであり、 電流検知リレー（ＩＲ）は、進行灯（Ｇ）への通電電流
を検知して動作するリレーであり、 切替用配線（３）は、進行灯（Ｇ）の電源配線と、注意
灯（Ｙ）の電源配線間に結線され、電圧検知リレー（Ｖ
Ｒ）の扛上接点（ＶＲ1）と、電流検知リレー（ＩＲ）
の落下接点（ＩＲ2）を通じて給電され、 半波整流器（４）は、切替用配線（３）を通じて注意灯
（Ｙ）に半波整流電流を通電するものであることを特徴
とする鉄道信号の滅灯防止装置。1. A railway signal extinguishing prevention device having an extinguishing circuit (2) attached to a signal control circuit (1), wherein the signal control circuit (1) comprises two signal control relays (H).
R) and (DR) are switched to perform presenting control of a traveling light (G), a caution light (Y), and a stop light (R), and each of the lights (G), (Y), and (R) is It is turned on by the current supplied from the AC power supply, has a signal bulb disconnection detector (Fid), and the traveling light (G) is a lifting contact (HR 1 ) of a signal control relay (HR) connected to the power supply wiring. Power is supplied through the lifting contact (DR 1 ) of the signal control relay (DR), and the warning light (Y) is connected to the lifting contact (HR 1 ) of the signal control relay (HR) connected to the power supply wiring; The power is supplied through the drop contact (DR 2 ) of the signal control relay (DR), and the stop light (R) is supplied with power through the drop contact (HR 2 ) of the signal control relay (HR) connected to the power supply wiring. The disconnection detector (Fid) is a traveling light (G), a caution light (Y), or a stop light (R). A circuit for detecting a current change when one of the signal bulbs is partially or completely disconnected. The light-out prevention circuit (2) switches between a voltage detection relay (VR) and a current detection relay (IR). The voltage detection relay (VR) is a relay that operates by detecting the voltage between both ends of the traveling light (G). The current detection relay (IR) is connected to the traveling light (G). The switching wiring (3) is connected between the power supply wiring of the traveling light (G) and the power supply wiring of the caution light (Y), and operates as a voltage detection relay (V).
R) lifting contact (VR 1 ) and current detection relay (IR)
Of the feed through the drop contacts (IR 2), a half-wave rectifier (4), of railway signaling, characterized in that those passing a half wave rectified current to caution light (Y) through the switching wires (3) Light extinguishing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4157463A JP2582704B2 (en) | 1992-05-25 | 1992-05-25 | Light-out prevention device for railway signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4157463A JP2582704B2 (en) | 1992-05-25 | 1992-05-25 | Light-out prevention device for railway signals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0640336A JPH0640336A (en) | 1994-02-15 |
| JP2582704B2 true JP2582704B2 (en) | 1997-02-19 |
Family
ID=15650219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4157463A Expired - Lifetime JP2582704B2 (en) | 1992-05-25 | 1992-05-25 | Light-out prevention device for railway signals |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2582704B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6334412B1 (en) | 2000-08-30 | 2002-01-01 | Toyota Jidosha Kabushiki Kaisha | Mono-block cylinder head structure of water cooled engine |
| JP2002104188A (en) * | 2000-10-03 | 2002-04-10 | Nippon Signal Co Ltd:The | Automatic block instrument |
| KR100726154B1 (en) * | 2005-10-26 | 2007-06-13 | 장붕익 | The error operation preventive system of railroad signal flag |
| JP5161047B2 (en) * | 2008-11-26 | 2013-03-13 | 株式会社日立製作所 | Signal light control circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5218616A (en) * | 1975-05-02 | 1977-02-12 | Toho Denki Kogyo Kk | Signal lamp control circuit |
-
1992
- 1992-05-25 JP JP4157463A patent/JP2582704B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0640336A (en) | 1994-02-15 |
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