Classifications

• • G—PHYSICS
  • G08—SIGNALLING
  • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
  • G08C25/00—Arrangements for preventing or correcting errors; Monitoring arrangements
  • G08C25/02—Arrangements for preventing or correcting errors; Monitoring arrangements by signalling back receiving station to transmitting station
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B61—RAILWAYS
  • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
  • B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
  • B61L5/12—Visible signals
  • B61L5/18—Light signals; Mechanisms associated therewith, e.g. blinders
  • B61L5/1809—Daylight signals
  • B61L5/1881—Wiring diagrams for power supply, control or testing

Definitions

• the present invention relates to a device for supplying and controlling the proper functioning of a railway signaling light making it possible to detect the existence of faults in an electrical line.
• a device for supplying and controlling the proper functioning of a railway signaling light making it possible to detect the existence of faults in an electrical line.
• it is essential, for the safety of rail traffic, to ensure permanent control of the proper functioning of signal lights.
• it is known to implement, in series in the electrical power supply line for the lights, which is isolated from the ground, a relatively complex control supply device including a relay operating only when a current nominal nominal flows in the line.
• the assembly thus formed is expensive while the length of the supply lines is limited.
• the present invention aims to overcome these drawbacks.
• Its subject is a device for supplying and controlling the proper functioning of a railway signaling light including a periodic current generator connected to a long power supply line by means of a first isolation transformer, the electric lamp of the signaling light being connected to the long line by means of a second isolation transformer.
• a first and a second four-terminal safety capacitors are respectively arranged in series by a first pair of their terminals in the long line with the secondary winding of the first transformer and with the primary winding of the second transformer, the second pair of terminals of the first capacitor being connected to the winding of a relay supplied with direct current and that of the second capacitor to the output terminals of a lamp operating detector generating a direct current.
• Figure 1 shows schematically a power supply and control device according to the invention and Figure 2 shows in detail a preferred embodiment of the operating detector according to the invention.
• the detection of the state of the lamp 1 of the signaling light is carried out locally at the level of the light by the detector 2, and the information recorded is transmitted by the power supply line 3 the lamp 1 at the winding of a relay 4 returning the information upstream to a central control station 5 "This detection is, therefore, in no way disturbed by the no-load currents of the transformers increased by the capacitive current of the cable. More specifically, a generator 6 of periodic current is connected to the long line 3 by means of a first transformer 7 of galvanic isolation and of a switch 8 for controlling the fire.
• This generator 6 can indifferently be constituted by a sinusoidal or alternating current generator or by a DC current generator, delivering for example a voltage of 127 Volts at a frequency of 400 Hertz.
• the lamp 1 is connected to the other end of the line 3 "via a second isolation transformer.
• a safety capacitor 11 In series in the long line 3 with the secondary winding of the isolation transformer 7, is arranged a safety capacitor 11 with four terminals.
• Such a capacitor has the particularity of being provided on each of its armatures with two terminals electrically connected to each other by the armature itself.
• a first pair of terminals is used for the series connection on line 3.
• the second pair of terminals of this capacitor 11 is connected to the winding of a relay 4 supplied with direct current and insensitive to periodic currents.
• This relay 4 controls the opening or closing of a line 12 allowing the display of the state of the lamp 1 in a central control station 5.
• a second four-terminal safety capacitor 13 is arranged in series by a first pair of its terminals in the long line 3 with the primary winding of the isolation transformer 9.
• the second pair of terminals of this capacitor 13 is connected to the output terminals of a detector 2 for operating the lamp 1, the detector 2 generating a direct current. Therefore, the circuit connected to the output of the detector 2 is closed for the direct current generated by the detector 2 via the safety capacitors 11 and 13 and in particular, their armatures, by the secondary of the transformer 7 and the transformer primary 9.
• the detector 2 for operating the lamp 1 can be produced in several ways.
• a photoelectric cell placed behind the lamp relative to the lens or above the lamp can thus be used as a detector.
• this cell is sensitive to sunlight focused by the lens of the signal light, it is preferable that it is only sensitive to radiation emitted in the infrared range so as to ensure the security of the information of good functioning transmitted to the central station.
• a thermocouple placed in the immediate vicinity of the filament of the lamp, inside or outside of the glass envelope of this lamp can also be used as an operating detector.
• FIG. 2 the preferred embodiment of an operating detector 2 is shown in FIG. 2 in which the same references designate the elements common to FIG. 1.
• This detector 2 comprises a current transformer 14 whose primary winding is arranged in series with the lamp to be checked and the secondary winding of the second isolation transformer 9 and whose secondary winding is connected to the terminals of a rectifier 15 so as to generate a direct current when a periodic current flows in the lamp.
• the continuous output terminals of this rectifier 15 are connected to the second pair of terminals of the safety capacitor 13 by means of a filter including at least one safety inductor 16 arranged in series in the circuit so as to prevent at the periodic current flowing in the long line 3 to reach the diodes of the rectifier 15.
• a capacitor 17 can be disposed between the output terminals of the rectifier 15.
• This capacitor 17 is, preferably, a four-terminal safety capacitor so as to detect a possible failure of this component.
• the combination of inductance 16 and capacitor 17 makes it possible to produce a divider of the periodic voltage such that the periodic voltage applied to the diodes of the rectifier 15 is less than the minimum conduction voltage of these diodes
• the rectifier 15 can optionally include two Zener diodes so as to regulate the direct current applied to the second pair of terminals of the safety capacitor 13 whatever the power of the lamp to be checked.
• the capacitor 17 may advantageously be a chemical capacitor of high value so as to delay the relay 4 to the fall.
• a device making it possible to note the agreement of the state of the switch 8 for controlling the light and the state of the relay 4, it is possible to detect any untimely lighting of the lamp. , for example due to a voltage induced in the long line 3 in the absence of the closing of the switch 8.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Train Traffic Observation, Control, And Security (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9227900

Family Applications (1)

Country Status (13)

Cited By (1)

Families Citing this family (12)

Citations (4)

Family Cites Families (5)

• 1979
  • 1979-07-16 FR FR7918323A patent/FR2461626A1/fr active Granted
• 1980
  • 1980-07-04 GB GB8108056A patent/GB2070834B/en not_active Expired
  • 1980-07-04 US US06/247,538 patent/US4376910A/en not_active Expired - Lifetime
  • 1980-07-04 BR BR8008744A patent/BR8008744A/pt unknown
  • 1980-07-04 NL NL8020242A patent/NL8020242A/nl not_active Application Discontinuation
  • 1980-07-04 DE DE3049741T patent/DE3049741C2/de not_active Expired
  • 1980-07-04 WO PCT/FR1980/000110 patent/WO1981000238A1/fr not_active Ceased
  • 1980-07-04 AU AU60574/80A patent/AU537703B2/en not_active Ceased
  • 1980-07-07 MX MX183068A patent/MX148109A/es unknown
  • 1980-07-14 IT IT49240/80A patent/IT1128132B/it active
  • 1980-07-14 BE BE1/9895A patent/BE884297A/fr not_active IP Right Cessation
  • 1980-07-15 CA CA000356217A patent/CA1151278A/fr not_active Expired
  • 1980-07-15 ZA ZA00804266A patent/ZA804266B/xx unknown

Patent Citations (4)

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