EP0381542B1 - Contacteur-inverseur protégé utilisant un système de transmission multifonctionnel pour la commande d'interrupteurs de confirmation - Google Patents
Contacteur-inverseur protégé utilisant un système de transmission multifonctionnel pour la commande d'interrupteurs de confirmation Download PDFInfo
- Publication number
- EP0381542B1 EP0381542B1 EP90400017A EP90400017A EP0381542B1 EP 0381542 B1 EP0381542 B1 EP 0381542B1 EP 90400017 A EP90400017 A EP 90400017A EP 90400017 A EP90400017 A EP 90400017A EP 0381542 B1 EP0381542 B1 EP 0381542B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electromagnet
- switches
- electromagnets
- shaft
- arm
- 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
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 11
- 238000012790 confirmation Methods 0.000 title abstract description 28
- 230000007246 mechanism Effects 0.000 claims description 10
- 238000005381 potential energy Methods 0.000 claims description 2
- 230000009347 mechanical transmission Effects 0.000 claims 1
- 238000005192 partition Methods 0.000 description 11
- 230000009471 action Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 239000004020 conductor Substances 0.000 description 4
- 230000005284 excitation Effects 0.000 description 4
- 230000000717 retained effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 241000287107 Passer Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 244000245420 ail Species 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H45/00—Details of relays
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/54—Contact arrangements
- H01H50/541—Auxiliary contact devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H51/00—Electromagnetic relays
- H01H51/005—Inversing contactors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H75/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of power reset mechanism
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H89/00—Combinations of two or more different basic types of electric switches, relays, selectors and emergency protective devices, not covered by any single one of the other main groups of this subclass
- H01H89/06—Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device
- H01H89/08—Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device with both devices using the same contact pair
Definitions
- the present invention relates to a protected reversing contactor using a multifunctional transmission system for controlling confirmation switches (see for example FR-A-2 598027).
- this type of reversing contactor usually comprises, inside a general housing, two identical contactor systems comprising two electromagnets, the armatures of which actuate two sets of respective phase switches, the inputs and outputs of which are respectively interconnected by means of two interconnection circuits.
- a general protection circuit including a magnetic protection device using, for each phase switch, a magnetic trip device whose coil passes through the current passing through this switch, and a thermal protection device using bimetallic strips mounted in the phase circuits located downstream of the output interconnection circuit.
- these two protection devices act in such a way as to cause a sudden opening of all the phase switches by means of a triggering mechanism at potential energy, following one of the two anomalies of the current previously. mentioned.
- these reversing contactors are fitted with a mechanical interlocking system preventing the simultaneous closing of the phase switches which would lead, due to the interconnection circuits, to a general short circuit in the sector.
- This protection is also supplemented, in certain cases, by the use of confirmation switches mounted in series in the supply circuit of the coils of the two electromagnets and which are actuated so as to cut off the supply circuit. of the electromagnet which is not excited, and thus prohibit any possibility of simultaneous excitation of the two electromagnets, for example following an erroneous command.
- the invention relates more particularly to a reversing contactor of this kind in which the actuation of the confirmation switches is effected by means of a multifunctional transmission system which can provide, in addition to the confirmation function, other safety functions having for effect of opening one or both confirmation switches.
- the two electromagnets are arranged side by side and have two respective armatures movable in translation parallel to a determined direction.
- the two rotary shafts are oriented perpendicular to said direction and are arranged opposite these two frames.
- the confirmation switch associated with each of these electromagnets is located in a region adjacent to this electromagnet and to a corresponding rotary shaft, so that it can be actuated by a finger of this shaft.
- one of the rotary shafts comprises an axial extension which overlaps the second rotary shaft as far as an area located beyond the arm carried by this second shaft.
- the arm associated with the first rotary shaft is then carried by the free end of the above-mentioned extension.
- each confirmation switch may comprise a fixed contact element carried by the carcass of the coil of the electromagnet which is associated with it, and a movable contact element constituted by a flexible blade whose first end cooperates with the element of fixed contact and the second end of which is fixedly mounted on a cover of the housing, so that the extraction of said cover involves opening the supply circuit of said coil.
- the first end of this flexible blade extends slightly beyond the fixed contact element, so as to be able to cooperate with one of the above first fingers.
- the aforesaid second fingers may be arranged in the vicinity of one another so as to be urged by a common actuating member provided to effect the simultaneous opening of the two confirmation switches.
- the protected reversing contactor comprises, inside a general housing 1, two identical three-phase contactor systems 2, 3 each comprising an electromagnet 4, 5 whose armature 6, 7 actuates a set of phase switches 9, 10, 11 and 12, 13, 14, and whose coils 15, 16 can be excited by a remote control circuit coming to connect on the terminals B1, B'1 - B2, B'2.
- switches 9 to 14 are respectively connected to three general input terminals 18, 19, 20 and are connected to each other by means of a first bundle F1 of interconnection conductors F R , F S , F T.
- This general protection circuit comprises, in series between each input couple 31, 32, 33 and output 24, 25, 26, a thermal trip device constituted, here, by a bimetallic strip 34, 35, 36 reacting to current overloads extending over time, and a magnetic trip device 30a, 30b, 30c sensitive to short-circuit currents.
- triggers both thermal 34, 35, 36, and magnetic 30a, 30b, 30c, act (links L1, L2) on the triggering member 37 'of a spring-loaded triggering mechanism 37, armed by means of a manual control member 38, which acts unidirectionally on the switches 9 to 14 via a transmission member (indicated by the link in dashed lines L3).
- This tripping mechanism 37 is more particularly designed so as to cause a sudden and simultaneous opening of switches 9 to 14, following the detection of one of the current anomalies, previously mentioned.
- the triggering of this mechanism 37 also causes the simultaneous opening of two confirmation switches I1, I2 respectively placed in series with the coils 15, 16 of the electromagnets 4, 5 (dashed line connection 40).
- the operating member 38 can be placed manually (or thanks to the remote-controlled unit) in a disarming state 0 which causes the simultaneous opening of the switches I1, I2 or in an arming state A (Auto) which causes them to close when the thermal equilibrium conditions are restored.
- a mechanical locking device 41 acting on the armatures 6, 7 of the electromagnets 4, 5 can be provided, in order to guarantee that one of the two contactor systems is open when the the other is closed.
- This locking is also doubled by an electromechanical locking involving two mechanical connections 42, 43 each connecting the armature 6, 7 of one of the electromagnets 4, 5 to the confirmation switch I1, I2 associated with the coil 15, 16 of the other electromagnet 4, 5, these two connections 42, 43 being designed so that the closing of one of the electromagnets 4, 5 causes the supply circuit of the coil 15, 16 to open. the other electromagnet 4, 5.
- the reversing contactor is produced in three modules, namely: a switch module M1, a direct switching control module M2, and an indirect switching control module M3.
- the switch module M1 comprises, inside a housing 46, two switching assemblies each comprising three pole switches 9 to 11 and 12 to 14 arranged side by side and only two of which, 9, 12, which correspond respectively to these two sets are visible in Figures 2 and 3.
- the housing 46 has an elongated shape with a generally parallelepipedal appearance and comprises, opposite the support face 59, a face assembly 60 having, in its middle part, a transverse partition 61.
- This transverse partition 61 divides the assembly face 60 into two zones Z1, Z2 respectively intended to receive the direct switching control module M2 and the control module indirect switching M3. It comprises, on the side of the assembly zone Z1, a stepped profile and, on the side of the zone Z2, a flat face F perpendicular to the assembly face 60.
- the zone Z2 comprises, in the vicinity of the partition 61, six orifices O aligned perpendicular to the plane of FIGS. 2 and 3 through which the pushers 57 of the six switches 9 to 14 pass.
- the direct switching control device M2 is housed in a box of parallelepiped shape having an open side situated opposite the partition 61, a base 62 which is fixed on the assembly zone Z2 and a cover 63 which extends over the other four sides of the case.
- This housing contains two electromagnets 4, 5 arranged side by side, including the armatures 65, 66, E-shaped which cooperate with fixed yokes, also E-shaped, 67, 68, are movable in translation parallel to the base 62 and perpendicular to the partition 61.
- the fixed yokes 67, 68 are removably mounted on the single cover 63.
- the two coils are directly accessible and can be easily changed for example to take account of a change in voltage .
- each of these frames 65, 66 carries two lateral pins 69, 69 '- 70, 70' which engage in two respective coaxial holes 169, 169 '- 170, 170' d '' a hinge yoke 71, 72 pivotally mounted on the base by means of a system articulation axis parallel to the pins 69, 69 '- 70, 70'.
- the yokes 71, 72 are formed by the union of two parallel L-shaped structures, whose vertical bars 73, 74 carry, at their ends, the two holes 169, 169 '- 170, 170', and whose angular regions are provided two respective pins 75, 75 '- 76, 76' which engage in holes made in articulation elements 77, 77 '- 78, 78' integral with the base 62.
- These springs 84, 85 are pre-tensioned so as to exert on the corresponding yokes 71, 72 a force tending to cause them to tilt clockwise to a limit stop position in which the horizontal bars 79, 80 are substantially parallel to the base 62, and the armatures 65, 66 of the electromagnets 4, 5 occupy a rest position, spaced from the fixed yokes 67, 68.
- horizontal bars 78, 79 also play the role of a transmission lever for actuating two respective drawers 86, 87 mounted to slide parallel to the partition 61.
- These drawers 86, 87 each have two parallel wings 88, 89 - 90, 91 connected to each other by two respective transverse portions 92, 93, the wings 88, 90 each coming to bear on the three pushers 57 of a set of switches 9 to 11 and 12 to 14 correspondents.
- the wings 89, 91 are, for their part, each provided with a guide slide 94, 95 which engages in a slot made in a metal partition 96 secured to the base 62 and which extends parallel to the partition 61.
- this electromagnet when excited, it causes the clevis 71, 72 to tilt in an anti-clockwise direction, against the action of the tension spring 84, 85.
- the movable assembly constituted by the bridge movable contact 54, the pusher 57 and the drawer 86, 87 which is no longer retained by the stopper 100, 101, is raised until the movable contacts 55, 56 come to bear against the fixed contacts 48, 49.
- the relevant switches 9 to 11 or 12 to 14 are then in the closed position.
- this excitation can be produced by a remote control circuit which is connected to the supply terminals of the coils of the two electromagnets provided on the cover (at the rate of two terminals B1, B'1 - B2, B ' 2 by coil 15, 16 of electromagnet).
- the electrical connection between the coil 15, 16 of each of the electromagnets 4, 5 and the two terminals B1, B'1 - B2, B'2 which corresponds to it includes a confirmation switch I1, I2 of the normally closed type, comprising a fixed contact C1, C2 mounted on the insulating casing of the coil 15, 16 and a movable contact constituted by one of the ends of a flexible blade D1, D2 whose l the other end is secured to the cover 63.
- the contact pressure between the end of the blade D1, D2 and the fixed contact C1, C2 is ensured by means of a pressure spring R1, R2 retained by a rigid tongue 105, 106 secured to the cover 63.
- This arrangement has the advantage of automatically cutting off the supply of the coils 15, 16 of the electromagnets 4, 5 when the cover 63 is removed.
- the two confirmation switches I1, I2 associated with the two coils are arranged laterally with respect to the electromagnets 4, 5, the assembly consisting of the fixed contacts C1, C2 and the ends of the flexible blades D1, D2 being located near the edge upper cover 63 adjacent to the open face of the housing.
- the confirmation switch I2 shown is mounted in the power supply circuit of the coil 16 of the electromagnet shown in Figure 3, while the switch I1 in Figure 3 is mounted in the supply circuit of the coil 15 of the electromagnet shown in Figure 2.
- the two transmission parts T1, T2 equip the two pins 69, 70 opposite which extend in the interval between the two frames 65, 66 of the electromagnets 4, 5.
- the two rotary shafts 109, 110 are arranged coaxially end to end around a common axis 113 secured to the partition 96.
- the shaft 110 which extends from the side of the frame 66, carries at its end adjacent to the shaft 109 a radial arm 112 situated so as to come into engagement with the arm 107 carried by the pin 69 integral of the frame 65.
- the shaft 109 which extends opposite the frame 65, is extended, beyond its end, by a gutter-shaped portion 118 which straddles the shaft 110 and carries at its end, the radial arm 111 engaging with the arm 108 carried by the pin 70 secured to the frame 66.
- the fingers 115 and 116 are arranged so as to cooperate with the ends of the flexible blades D1, D2 constituting the movable contacts of the confirmation switches I1, I2, in the following manner.
- the yoke 72 occupies an inclined position, against the action of the tension spring 85 and allows the pole switches 12 to 14 to close under the action of the spring 58.
- the arm 108 acts on the arm 111 to maintain the shaft 109 in an angular position according to which the finger 116 maintains the end of the flexible blade D1 of the confirmation switch I1 associated with the electromagnet 4, spaced from the fixed contact C1.
- the circuit of the coil 15 of the electromagnet 4 is therefore open and therefore prohibits any possibility of excitation of this electromagnet 4.
- the second actuator 134 (movable in translation along the double arrow) can also take a rest position (corresponding to the "Auto" position of the button) in which it does not stress the fingers 138, 139, and a working position (other positions of the button 132) in which it acts on the two fingers 138, 139 to maintain the shafts 109 and 110 in an angular position in which the fingers 115 and 116 ensure opening of the confirmation contacts I1 and I2 of the two electromagnets 4, 5, so as to prohibit their excitation when the button 132 is not in the "Auto" position.
- the triggering device 130 further comprises a triggering member 142 represented here by a pusher, which, when it is pressed, causes the first actuating member 133 to pass suddenly, from its retracted position to its deployed position.
- a triggering member 142 represented here by a pusher, which, when it is pressed, causes the first actuating member 133 to pass suddenly, from its retracted position to its deployed position.
- the protection devices associated with the triggering device 130 which are here housed in the indirect switching control module M3 have been represented diagrammatically by a block 143 in FIG. 3.
- actuating member 144 (represented by a pusher) arranged so as to urge the triggering member 142 following the detection of an anomaly of the current passing through the pole switches.
- connection elements 145 provided on a staging of the partition 61.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Breakers (AREA)
- Keying Circuit Devices (AREA)
- Transmitters (AREA)
- Relay Circuits (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
- Protection Of Static Devices (AREA)
- Tumbler Switches (AREA)
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
- Selective Calling Equipment (AREA)
- Gear-Shifting Mechanisms (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8901393 | 1989-02-03 | ||
FR8901393A FR2642893B1 (fr) | 1989-02-03 | 1989-02-03 | Contacteur-inverseur protege utilisant un systeme de transmission multifonctionnel pour la commande d'interrupteurs de confirmation |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0381542A1 EP0381542A1 (fr) | 1990-08-08 |
EP0381542B1 true EP0381542B1 (fr) | 1993-12-08 |
Family
ID=9378445
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90400017A Expired - Lifetime EP0381542B1 (fr) | 1989-02-03 | 1990-01-04 | Contacteur-inverseur protégé utilisant un système de transmission multifonctionnel pour la commande d'interrupteurs de confirmation |
Country Status (17)
Country | Link |
---|---|
US (1) | US5099385A (xx) |
EP (1) | EP0381542B1 (xx) |
JP (1) | JPH02239532A (xx) |
KR (1) | KR930001955B1 (xx) |
AT (1) | ATE98400T1 (xx) |
CA (1) | CA2007196A1 (xx) |
CH (1) | CH682432A5 (xx) |
DE (1) | DE4003109C2 (xx) |
DK (1) | DK0381542T3 (xx) |
ES (1) | ES2020423A6 (xx) |
FI (1) | FI96252C (xx) |
FR (1) | FR2642893B1 (xx) |
GB (1) | GB2227885B (xx) |
HK (1) | HK33094A (xx) |
IT (1) | IT1237953B (xx) |
SG (1) | SG123193G (xx) |
SU (1) | SU1734583A3 (xx) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2758903B1 (fr) * | 1997-01-29 | 1999-02-26 | Schneider Electric Sa | Systeme inverseur de marche, notamment pour contacteur- disjoncteur |
US6157830A (en) * | 1997-05-22 | 2000-12-05 | Telefonaktiebolaget Lm Ericsson | Speech quality measurement in mobile telecommunication networks based on radio link parameters |
US6201960B1 (en) * | 1997-06-24 | 2001-03-13 | Telefonaktiebolaget Lm Ericsson (Publ) | Speech quality measurement based on radio link parameters and objective measurement of received speech signals |
WO2001013397A1 (de) * | 1999-08-12 | 2001-02-22 | Siemens Aktiengesellschaft | Elektromagnetisches schaltgerät |
DE10332358A1 (de) * | 2003-07-17 | 2005-02-03 | Abb Patent Gmbh | Kontaktsystem mit Magnetauslöser |
DE102004062267A1 (de) * | 2004-12-23 | 2006-07-13 | Siemens Ag | Verfahren und Vorrichtung zum sicheren Betrieb eines Schaltgerätes |
FR2894736B1 (fr) * | 2005-12-14 | 2008-02-15 | Moteurs Patay Soc Par Actions | Systeme de controle de moteur electrique |
EP1775823B1 (fr) * | 2005-10-12 | 2016-12-14 | Moteurs Leroy-Somer | Machine électrique |
WO2008034467A1 (de) * | 2006-09-21 | 2008-03-27 | Siemens Aktiengesellschaft | Schaltgeräteeinheit zum schalten von mindestens zwei betriebszuständen |
EP2031623B1 (de) * | 2007-09-03 | 2013-10-30 | Siemens Aktiengesellschaft | Stromwandlerbaugruppe mit einer Phasenwendeverdrahtung sowie Schaltgerät mit einer derartigen Wandlerbaugruppe |
US10032588B2 (en) * | 2013-09-24 | 2018-07-24 | Ford Global Technologies, Llc | Integrated high voltage contactor and service disconnect |
DE102015213240B4 (de) * | 2015-07-15 | 2020-02-06 | Siemens Aktiengesellschaft | Schutzschalter |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2134207A (en) * | 1936-06-22 | 1938-10-25 | Cutler Hammer Inc | Electric switch |
US3919675A (en) * | 1974-12-23 | 1975-11-11 | Gen Electric | Interlocking arrangement for a pair of electrical contactors |
JPS60205937A (ja) * | 1984-03-29 | 1985-10-17 | 株式会社市右衛門商社 | 電磁接触器 |
FR2598027B1 (fr) * | 1986-04-23 | 1990-10-12 | Telemecanique Electrique | Appareil contacteur inverseur protege conte les surintensites de courant |
FR2617328B1 (fr) * | 1987-06-26 | 1989-11-03 | Telemecanique Electrique | Dispositif de condamnation mecanique et electrique pour contacteurs |
JPH02100229A (ja) * | 1988-10-06 | 1990-04-12 | Mitsubishi Electric Corp | 遠隔操作式回路遮断器 |
-
1989
- 1989-02-03 FR FR8901393A patent/FR2642893B1/fr not_active Expired - Lifetime
- 1989-12-18 GB GB8928523A patent/GB2227885B/en not_active Expired - Fee Related
- 1989-12-22 CH CH4640/89A patent/CH682432A5/fr not_active IP Right Cessation
-
1990
- 1990-01-04 DK DK90400017.1T patent/DK0381542T3/da active
- 1990-01-04 EP EP90400017A patent/EP0381542B1/fr not_active Expired - Lifetime
- 1990-01-04 AT AT90400017T patent/ATE98400T1/de not_active IP Right Cessation
- 1990-01-04 CA CA002007196A patent/CA2007196A1/fr not_active Abandoned
- 1990-01-16 IT IT01906990A patent/IT1237953B/it active IP Right Grant
- 1990-02-01 US US07/473,502 patent/US5099385A/en not_active Expired - Fee Related
- 1990-02-02 KR KR1019900001267A patent/KR930001955B1/ko not_active IP Right Cessation
- 1990-02-02 JP JP2024262A patent/JPH02239532A/ja active Pending
- 1990-02-02 SU SU904742959A patent/SU1734583A3/ru active
- 1990-02-02 DE DE4003109A patent/DE4003109C2/de not_active Expired - Fee Related
- 1990-02-02 FI FI900538A patent/FI96252C/fi not_active IP Right Cessation
- 1990-02-02 ES ES9000323A patent/ES2020423A6/es not_active Expired - Lifetime
-
1993
- 1993-11-15 SG SG123193A patent/SG123193G/en unknown
-
1994
- 1994-04-14 HK HK33094A patent/HK33094A/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
SG123193G (en) | 1994-02-25 |
FR2642893A1 (fr) | 1990-08-10 |
FI96252C (fi) | 1996-05-27 |
CH682432A5 (fr) | 1993-09-15 |
ATE98400T1 (de) | 1993-12-15 |
FI900538A0 (fi) | 1990-02-02 |
CA2007196A1 (fr) | 1990-08-03 |
IT1237953B (it) | 1993-06-19 |
US5099385A (en) | 1992-03-24 |
DE4003109C2 (de) | 1999-03-25 |
EP0381542A1 (fr) | 1990-08-08 |
KR930001955B1 (ko) | 1993-03-20 |
HK33094A (en) | 1994-04-22 |
ES2020423A6 (es) | 1991-08-01 |
IT9019069A0 (it) | 1990-01-16 |
IT9019069A1 (it) | 1990-08-04 |
FI96252B (fi) | 1996-02-15 |
DE4003109A1 (de) | 1990-08-09 |
GB2227885B (en) | 1993-08-25 |
GB2227885A (en) | 1990-08-08 |
FR2642893B1 (fr) | 1991-04-19 |
SU1734583A3 (ru) | 1992-05-15 |
DK0381542T3 (da) | 1994-04-11 |
GB8928523D0 (en) | 1990-02-21 |
KR900013553A (ko) | 1990-09-06 |
JPH02239532A (ja) | 1990-09-21 |
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Legal Events
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