EP0052759A2 - Dispositif dans un poste électronique d'aguillage pour l'alimentation et le télécontrôle de la commande d'aiguilles - Google Patents

Dispositif dans un poste électronique d'aguillage pour l'alimentation et le télécontrôle de la commande d'aiguilles Download PDF

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Publication number
EP0052759A2
EP0052759A2 EP81108599A EP81108599A EP0052759A2 EP 0052759 A2 EP0052759 A2 EP 0052759A2 EP 81108599 A EP81108599 A EP 81108599A EP 81108599 A EP81108599 A EP 81108599A EP 0052759 A2 EP0052759 A2 EP 0052759A2
Authority
EP
European Patent Office
Prior art keywords
switch
drive
wss
phase
contacts
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.)
Granted
Application number
EP81108599A
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German (de)
English (en)
Other versions
EP0052759A3 (en
EP0052759B1 (fr
Inventor
Heinrich Dipl.-Ing. Köhnecke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT81108599T priority Critical patent/ATE18745T1/de
Publication of EP0052759A2 publication Critical patent/EP0052759A2/fr
Publication of EP0052759A3 publication Critical patent/EP0052759A3/de
Application granted granted Critical
Publication of EP0052759B1 publication Critical patent/EP0052759B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • B61L5/10—Locking mechanisms for points; Means for indicating the setting of points
    • B61L5/107—Locking mechanisms for points; Means for indicating the setting of points electrical control of points position
    • 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
    • B61L5/06—Electric devices for operating points or scotch-blocks, e.g. using electromotive driving means
    • B61L5/062—Wiring diagrams

Definitions

  • the invention relates to a device in an electronic signal box for feeding and remote monitoring of three-phase three-phase turnout drives with contacts arranged in the star point connections of the motor windings and controlled by the drive, via which the motor windings can be switched on when the switch contacts are closed and via which After the drive has rotated and the new end position has been reached, a monitoring circuit for a dc-operated switch monitor is conducted via the four lines and the three windings of the drive, the motor windings being fed asymmetrically at least during the run-down phase, but symmetrically during the run-round phase .
  • Such a device is known for example from DE-PS 977 164. It has proven itself in practice and is still used in principle today.
  • the switching means for controlling and monitoring are implemented in relay technology.
  • the safety required in the railway system is achieved on the one hand by circuit-technical dependencies between the control, actuating and monitoring switching means of a signal box-side control module for the relevant switch, the so-called switch group, and by the constructive design of the relays used, namely by positively driven contacts and possibly me mechanical support of the individual contact systems. Every malfunction of the turnout or one of the components intended to control, set and monitor the turnout leads to a malfunction indicator in the relevant turnout group.
  • the fault identification is thus decentralized. It is caused by the fact that at least one of the relay contacts provided there does not assume the position within the switch group that it should assume in the correct operating state or operating behavior, so that a functionally determined circuit, for example a monitoring circuit, does not come about.
  • Control commands must be transmitted in one direction and monitoring messages in the other direction via the interface between the logic circuits of the electronic signal box and the power range of a point machine.
  • the phase direction of the drive is selected first by a phase changer, such as a relay, and then the line voltage to the drive is switched on using a circuit breaker, such as a contactor. If this switch switches at the wrong time, a corresponding message must be issued immediately.
  • the monitoring also has the end positions monitoring and testing of all four actuators leading to the actuator. Furthermore, an absolute potential separation between logic and power range must be guaranteed both in the message and in the command direction.
  • a further development of the invention should allow the marking of the switch position taken in each case;
  • Another development is to include the respective switching position of the phase changer in the monitoring process, i.e. the respective monitoring result should include a comparison of the target and actual position of the point machine.
  • the object of the present invention is therefore to provide a device of the type specified in the preamble of claim 1, which fulfills this requirement.
  • a monitor controlled by the actuating current is connected, which via a subordinate switching element resets a control switch previously set when initiating a reversal process for the switching contacts if it is inside a predetermined period of time since the beginning of the reversal process changes from the unaffected to the affected operating state.
  • the specified period of time is determined by the longest orbital period of the drive to be expected in operational terms.
  • a preferred embodiment of the invention in which the time for switching off a drive at.
  • the control logic of the interlocking has reached the end position, it is ultimately independent of the program sequence within the logic, and provides that a first switch that can be controlled by the actuating current is connected in the center conductor of the supply circuit, that the interlocking is in the de-energized state of the switch during the circulation phase of the actuator triggers a control signal for turning on a first switch in parallel g eschalteten further switch and that the further switch resets the previously set control switch in its response, and deletes the control signal.
  • the reliability of a monitoring message and thus the security of the process control by an electronic signal box depends largely on the functionality of the decentralized monitoring modules.
  • no separate switching means should be required for the functional test of the monitors, but rather the same switching means should be used as are already available for controlling the drive.
  • FIGS. 1 to 6 show the actuating and monitoring circuit of a point machine in different operating phases together with the monitoring switching means provided according to the invention and the monitoring indicators given by them;
  • FIG. 7 shows a preferred embodiment of the device according to the invention for feeding and monitoring a point machine.
  • a switch drive A is shown schematically in FIG. 1, which is fed via four lines L1 to L4 and can be controlled and monitored from an interlocking.
  • the drive has a three-phase motor with the windings W1 to W3, which are connected in a known manner via end position contacts AK1 to AK4.
  • a three-phase three-phase network with phases R, S, T and the common neutral conductor Mp serves as the power supply device for reversing the drive.
  • Contacts WSS / 1 to'WSS / 4 of a control switch are in the outer conductors L1 to L3 and in the central conductor L4 (WSS in Figure 7) switched, which are temporarily closed by the control switch for reversing the drive from one position to the other.
  • contacts WLR / 1 to WLR / 4 of a turnout direction selector are connected in or between two of the three outer conductors, via which the phase position of the currents flowing on the outer conductors L1 and L2 for the right-hand and left-hand rotation of the drive is interchangeable.
  • the monitoring circuit is operated potential-free in order to keep the monitors from disturbing driving current influences.
  • a potential-free DC voltage source Up R serves as the power supply for the monitoring circuit.
  • the monitoring current flowing causes the monitors Ü1 and Ü2 to deliver the corresponding data to the downstream control computer (the monitor Ü4 is not influenced by the monitoring current; it responds during the start-up and shutdown phase of the drive).
  • the current-carrying state of the monitor Ü1, together with a monitoring indicator of one of the monitors Ü2 and Ü3, serves to identify the end position of the drive; Without these monitoring indicators, the current-carrying status of the monitor Ü1 signals a switch opening message.
  • the de-energized state occurs due to operational reasons when the drive is converted.
  • the monitor Ü2 is used as a switch position monitor, for example for the plus position of the switch.
  • the turnout position monitor Ü3 for the minus position of the turnout is short-circuited by a diode D3.
  • the switch position monitor Ü2 for the positive position of the switch is short-circuited by a diode D2 connected in parallel to its inputs when the drive assumes the other end position.
  • the positioning computer determines the turnout position of the turnout controlled by the drive according to a logic that is memorized to it, and stores a corresponding identifier for call-up and further processing in assigned memory switching means as required.
  • the drive motor starts to rotate without first changing the end position contacts AK1 to AK4.
  • the control current flowing through the center conductor L4 in the start-up phase influences the monitor U4 provided according to the invention and thus leads to the fact that A corresponding H potential can be tapped at the output A4 of the monitor.
  • L potential is present at outputs A1 to A3 of monitors Ü1 to Ü3.
  • the control switch (WSS in FIG. 7) previously set for reversing the drive is reset to the starting position in a manner still to be explained.
  • the contacts WSS / 1 to WSS / 8 controlled by him change into the switch position shown in FIG.
  • the contacts WSS / 1 to WSS / 4 interrupt the feed current circle for the drive motor;
  • the contacts WSS / 5 to WSS / 8 enable the formation of the monitoring circuit as it is optically highlighted in FIG. 5.
  • the turnout position monitor Ü3 for the minus position of the turnout is acted upon while the turnout position monitor Ü2 for the plus position remains unaffected.
  • Figures 1 to 6 show where in the inventive device for dining and remote monitoring of Point machine monitors must be provided, the purpose of these monitors and what messages they send to a downstream control computer.
  • the technical training of the supervisors is in principle of no importance.
  • the monitors are particularly advantageous as optocouplers because they enable absolute potential separation between the power circuit and the evaluation logic.
  • optocouplers are not safety-related components in which, in the event of a defect, it must be expected that they will not work in a recognizable manner. For this reason, in order to achieve the same level of safety as with monitors implemented in relay technology, it must be ensured that at least those monitors designed as optocouplers can be checked for correct functioning, the output signals of which indicate the correct operating state of the drive.
  • a defect in an optocoupler can have two effects, firstly, the optocoupler continuously emits a signal at its output, regardless of its input data, or it is no longer able to emit a signal. Only the first error can be dangerous because the downstream control computer only derives indicators of a safe condition from the H potential.
  • the test is carried out by sporadically or preferably cyclically reversing the optocouplers between the individual changeover phases of the point machine. They must switch to the other switching state if the operating behavior is correct. This change can be monitor in a suitable manner in the downstream control computer, which expediently also issues the commands for reversing the optocouplers. In this way, a very short fault disclosure time can be achieved, which gives the device according to the invention the same security as a corresponding device implemented in relay technology.
  • the control switch WSS required to apply the supply voltage to the drive is usually de-energized. If the control logic of the control computer has developed a control command, it influences a safe output circuit for the command in a manner not specified.
  • This output circuit can be designed, for example, as a safe amplifier V, as it was developed for the railway industry.
  • the DC voltage occurring at the output of the output amplifier V serves as a supply voltage for the control switch WSS and, via a voltage divider comprising a resistor R and a thyristor Th1, also serves as a control voltage for a switch T2 located in the supply circuit of the control switch.
  • This switch has a low resistance when the thyristor is blocked, so that the control switch WSS can respond and its contacts can change to the position shown in FIG. 2, in which they on the one hand interrupt the monitoring circuit and on the other hand close the supply circuit for the drive motor.
  • a feed current usually flows through the center conductor L4. It is in the secondary winding of a current transformer W a voltage is built up which, after rectification in a two-way rectifier G and smoothing on a capacitor C, temporarily sets a first switch K1.
  • This switch is designed as an optocoupler, the light-emitting diode of which is arranged parallel to the capacitor.
  • the switching transistor of the optocoupler is usually turned on for the duration of the start-up phase, that is to say the asymmetrical feeding of the motor windings; during the subsequent circulation phase of the drive, the switch is in any case high-resistance.
  • control code e to a downstream switching element E, which converts the control code into a control signal that is present for a longer time.
  • This control signal switches the transistor T1, which is provided for the functional test of the monitors during the changeover pauses of the drive.
  • the transistor T1 which has the function of an intermediate switch, controls another switch K2 from one position to the other.
  • This switch is also designed as an optocoupler, the light-emitting diode being connected to the emitter-collector circuit of the transistor T1.
  • the switching transistor of this optocoupler is in the control circuit of another optocoupler K3.
  • the opening of the further switch K2 initially has no effect on the switching state of the control switch WSS, because, according to the assumption, the intermediate switch T1 was only activated after the start-up phase of the drive and at this point in time the supply circuit via the center conductor L4 has already been opened again. However, when the run-down phase is reached after the drive has rotated, current flows through the center conductor L4. They like it The returning supply voltage for the switches K1 and K2 causes the third optocoupler K3 to also become effective.
  • the switching transistor of this optocoupler becomes conductive as soon as the threshold voltage of the associated light-emitting diode is reached and controls the downstream thyristor Th1.
  • the voltage drop at the resistor R connected in series with the thyristor Th1 changes.
  • control switch T2 This leads to the blocking of the switch T2 in the supply circuit of the control switch.
  • the control switch is thereby de-energized and controls its contacts again in the position shown in Figure 1, in which they interrupt the supply circuit for the motor windings of the drive and close the monitoring circuit via the four wires and the three windings of the drive.
  • the control computer registers via the output signal of the first switch K1 that the run-down phase of the drive has been reached and then, after the end of the run-down phase, switches the intermediate switch T1 back to the high-resistance state, which it had also assumed before the switch changeover began.
  • the control computer switches off the safe output amplifier V and thus causes the supply voltage for the control switch WSS to be switched off. The circuit is thus again in the starting position assumed in FIG. 7.
  • the device specified in FIG. 7 makes it possible to determine the switch-off time for driving a switch very precisely and independently of the reaction time of the control elements required for data processing and to carry out the switch-off in an electronic signal box.
  • the transistor T1 is advantageously turned out several times uses, namely once during the changeover pauses to briefly shed the monitors energized in the monitoring circuit of the drive and thus to subject them to a functional test and on the other hand to switch off the control switch as soon as the drive has been changed over and has reached its new end position.
  • the signal box switches off the safe output amplifier V and thus interrupts the power supply for the control switch that is still switched on ;
  • the still closed supply circuit for the drive in question is opened and the end position and switch position monitoring performed Prepared to close the control switch break contacts.
  • the device according to the invention for feeding and remote monitoring of turnout drives not only works as intended when a turnout drive is to be changed over from one of its two end positions, but also when the drive has not reached its predetermined end position. This case can e.g. occur if a foreign body, e.g. Crushed stone, is jammed.
  • the start-up phase explained with reference to FIG. 2 is skipped during the changeover process of the drive and the drive motor is only excited symmetrically until the runout phase is reached.
  • the first switch K1 remains unaffected during the changeover process; it causes the control signal e to be output, which then, in accordance with the intended purpose, disconnects the control circuit in the run-down phase of the drive.
  • the inclusion of the contacts WSS / 5 to WSS / 8 controlled by the control switch in the monitoring circuit ensures that the supply circuit for the drive is definitely interrupted when a monitoring circuit is established.
  • the correct operating behavior of the direction-of-rotation selector whose contacts WLR / 1 to WLR / 4 determine the direction of rotation of the drive, was not monitored.
  • the functional behavior of this selector can be checked in a simple manner by making the response of the monitors U2 and U3 for the switch position identification dependent on the switching state of the direction selector.
  • the switch position monitor Ü2 For the plus position of the turnout, a contact of the direction selector closed in the plus position of the turnout must be connected in series or an open contact of the direction selector connected in parallel.
  • the functional behavior of the direction selector can also be monitored in that the monitor U1 connects a contact of the direction selector in series and this series circuit is connected in series with a further monitor and an exclusion contact of the direction selector.
  • the monitor U1 connects a contact of the direction selector in series and this series circuit is connected in series with a further monitor and an exclusion contact of the direction selector.
  • the monitor U1 connects a contact of the direction selector in series and this series circuit is connected in series with a further monitor and an exclusion contact of the direction selector.
  • the monitor U1 connects a contact of the direction selector in series and this series circuit is connected in series with a further monitor and an exclusion contact of the direction selector.
  • the supervisor can see whether the direction selector is actually in the switch position specified by the last actuating job or not; Malfunctions in the operating behavior of the direction selector can thus be recognized shortly after they occur. (Short error reporting time; the error is recognized and can be remedied before a possibly open other errors occur and can lead to incorrect control of the drive).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Motor And Converter Starters (AREA)
  • Selective Calling Equipment (AREA)
  • Details Of Television Systems (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Keying Circuit Devices (AREA)
  • Control Of Ac Motors In General (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
EP81108599A 1980-11-19 1981-10-20 Dispositif dans un poste électronique d'aguillage pour l'alimentation et le télécontrôle de la commande d'aiguilles Expired EP0052759B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81108599T ATE18745T1 (de) 1980-11-19 1981-10-20 Einrichtung bei einem elektronischen stellwerk zum speisen und fernueberwachen von weichenantrieben.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3043661 1980-11-19
DE19803043661 DE3043661A1 (de) 1980-11-19 1980-11-19 Einrichtung bei einem elektronischen stellwerk zum speisen und fernueberwachen von weichenantrieben

Publications (3)

Publication Number Publication Date
EP0052759A2 true EP0052759A2 (fr) 1982-06-02
EP0052759A3 EP0052759A3 (en) 1982-10-27
EP0052759B1 EP0052759B1 (fr) 1986-03-26

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EP81108599A Expired EP0052759B1 (fr) 1980-11-19 1981-10-20 Dispositif dans un poste électronique d'aguillage pour l'alimentation et le télécontrôle de la commande d'aiguilles

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EP (1) EP0052759B1 (fr)
AT (1) ATE18745T1 (fr)
DE (2) DE3043661A1 (fr)
ZA (1) ZA817991B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3638681A1 (de) * 1986-11-13 1988-05-19 Siemens Ag Einrichtung zum fernueberwachen von drehstromweichenantrieben
AT400430B (de) * 1991-02-13 1995-12-27 Siemens Ag Schaltung zum dezentralen abschalten von weichenantrieben bei stellzeitüberschreitung
EP1593575A1 (fr) * 2004-05-07 2005-11-09 Alcatel Commande électronique d'un aiguillage avec surveillance de sa position
EP1724177A1 (fr) * 2005-05-12 2006-11-22 Alcatel Circuit, commande et système pour contrôler les lames d'aiguille de chemin de fer
EP2181907A1 (fr) * 2008-10-29 2010-05-05 Siemens Aktiengesellschaft Système de diagnostic d'aiguillages
AT509241B1 (de) * 2010-01-14 2012-03-15 Vae Eisenbahnsysteme Gmbh Verfahren zum überprüfen der schalter bzw. der kabel einer überwachungseinrichtung des antriebs von schienenweichen sowie vorrichtung zur durchführung dieses verfahrens
EP4249345A1 (fr) * 2022-03-22 2023-09-27 GTS Schweiz AG Fonctionnement d'un élément sur le terrain dans une installation technique ferroviaire au moyen d'une interface à quatre fils

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3330869C2 (de) * 1983-08-26 1986-07-03 Siemens AG, 1000 Berlin und 8000 München Schaltung zum Erkennen von Erdschlüssen in den Speisekreisen von Drehstrom-Weichenantrieben
DE3404825C2 (de) * 1984-02-09 1989-01-12 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Schaltungsanordnung zur Steuerung und Sicherung einer durch eine Fernstelleinrichtung (Stellwerk) oder eine Ortsstelleinrichtung bedienbaren Weiche
DE3638680A1 (de) * 1986-11-13 1988-05-19 Siemens Ag Einrichtung zum steuern von weichen in ablaufanlagen
DE3715478A1 (de) * 1987-05-06 1988-11-17 Licentia Gmbh Schaltungsanordnung zur ueberwachung einer weiche
DE19606893C2 (de) * 1996-02-13 2001-09-20 Siemens Ag Polwendeschalter für einen Weichenantrieb
DE19606894C2 (de) * 1996-02-13 2003-01-23 Siemens Ag Einrichtung zur signaltechnisch sicheren Steuerung und Überwachung elektrischer Verbraucher im Eisenbahnwesen
DE19606895C2 (de) * 1996-02-13 2001-07-05 Siemens Ag Schaltung zum Steuern und Überwachen von Weichenantrieben
DE102009023262B4 (de) 2008-05-29 2010-09-02 Funkwerk Information Technologies Gmbh Schaltung zur Überwachung von Endlagenschaltern eines 4-Draht-Drehstrom-Antriebs einer Weiche
DE102009055676B4 (de) * 2009-11-20 2015-04-23 Siemens Aktiengesellschaft Schaltung zur Ansteuerung und Überwachung einer Mehrlagenweiche

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1099520B (de) * 1957-01-04 1961-02-16 E F Drew & Co Inc Verfahren zur Herstellung von Monoglyceriden von Fettsaeuren mit 8 bis 22 Kohlenstoffatomen
DE1099570B (de) * 1955-12-01 1961-02-16 Werk Signal Sicherungstech Veb Schaltungsanordnung zur Innenabschaltung des Stellstromes nach beendigtem Stellvorgang in einer vieradrigen Drehstrom-Weichenschaltung
DE977164C (de) * 1952-02-10 1965-04-22 Siemens Ag Vieradrige Schaltung zum Stellen und UEberwachen von drehstromgesteuerten Antrieben fuer Weichen und Gleissperren
DE2607328A1 (de) * 1976-02-23 1977-08-25 Siemens Ag Steuer- und ueberwachungsschaltung fuer drehstrom-weichenantriebe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE977164C (de) * 1952-02-10 1965-04-22 Siemens Ag Vieradrige Schaltung zum Stellen und UEberwachen von drehstromgesteuerten Antrieben fuer Weichen und Gleissperren
DE1099570B (de) * 1955-12-01 1961-02-16 Werk Signal Sicherungstech Veb Schaltungsanordnung zur Innenabschaltung des Stellstromes nach beendigtem Stellvorgang in einer vieradrigen Drehstrom-Weichenschaltung
DE1099520B (de) * 1957-01-04 1961-02-16 E F Drew & Co Inc Verfahren zur Herstellung von Monoglyceriden von Fettsaeuren mit 8 bis 22 Kohlenstoffatomen
DE2607328A1 (de) * 1976-02-23 1977-08-25 Siemens Ag Steuer- und ueberwachungsschaltung fuer drehstrom-weichenantriebe

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3638681A1 (de) * 1986-11-13 1988-05-19 Siemens Ag Einrichtung zum fernueberwachen von drehstromweichenantrieben
AT400430B (de) * 1991-02-13 1995-12-27 Siemens Ag Schaltung zum dezentralen abschalten von weichenantrieben bei stellzeitüberschreitung
EP1593575A1 (fr) * 2004-05-07 2005-11-09 Alcatel Commande électronique d'un aiguillage avec surveillance de sa position
EP1724177A1 (fr) * 2005-05-12 2006-11-22 Alcatel Circuit, commande et système pour contrôler les lames d'aiguille de chemin de fer
EP2181907A1 (fr) * 2008-10-29 2010-05-05 Siemens Aktiengesellschaft Système de diagnostic d'aiguillages
AT509241B1 (de) * 2010-01-14 2012-03-15 Vae Eisenbahnsysteme Gmbh Verfahren zum überprüfen der schalter bzw. der kabel einer überwachungseinrichtung des antriebs von schienenweichen sowie vorrichtung zur durchführung dieses verfahrens
EP4249345A1 (fr) * 2022-03-22 2023-09-27 GTS Schweiz AG Fonctionnement d'un élément sur le terrain dans une installation technique ferroviaire au moyen d'une interface à quatre fils

Also Published As

Publication number Publication date
ZA817991B (en) 1982-10-27
EP0052759A3 (en) 1982-10-27
DE3043661A1 (de) 1982-07-08
EP0052759B1 (fr) 1986-03-26
DE3174199D1 (en) 1986-04-30
ATE18745T1 (de) 1986-04-15

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