EP0143927B1 - Dispositif pour le rappel du porte-contact d'un appareil de commutation électromagnétique, en particulier d'un commutateur de protection - Google Patents

Dispositif pour le rappel du porte-contact d'un appareil de commutation électromagnétique, en particulier d'un commutateur de protection Download PDF

Info

Publication number
EP0143927B1
EP0143927B1 EP84111280A EP84111280A EP0143927B1 EP 0143927 B1 EP0143927 B1 EP 0143927B1 EP 84111280 A EP84111280 A EP 84111280A EP 84111280 A EP84111280 A EP 84111280A EP 0143927 B1 EP0143927 B1 EP 0143927B1
Authority
EP
European Patent Office
Prior art keywords
clapper
contact carrier
lever
type armature
restoring spring
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
EP84111280A
Other languages
German (de)
English (en)
Other versions
EP0143927A2 (fr
EP0143927A3 (en
Inventor
Georgi Cwetanski
Roland Kupferschmitt
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.)
ASEA BROWN BOVERI AKTIENGESELLSCHAFT
Original Assignee
ASEA BROWN BOVERI AG
Asea Brown Boveri AG Germany
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 ASEA BROWN BOVERI AG, Asea Brown Boveri AG Germany filed Critical ASEA BROWN BOVERI AG
Priority to AT84111280T priority Critical patent/ATE66091T1/de
Publication of EP0143927A2 publication Critical patent/EP0143927A2/fr
Publication of EP0143927A3 publication Critical patent/EP0143927A3/de
Application granted granted Critical
Publication of EP0143927B1 publication Critical patent/EP0143927B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/64—Driving arrangements between movable part of magnetic circuit and contact
    • H01H50/643—Driving arrangements between movable part of magnetic circuit and contact intermediate part performing a rotating or pivoting movement
    • H01H50/644—Driving arrangements between movable part of magnetic circuit and contact intermediate part performing a rotating or pivoting movement having more than one rotating or pivoting part
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/24—Parts rotatable or rockable outside coil

Definitions

  • the invention relates to a device according to the preamble of claim 1.
  • Known, commercially available contactors have an electromagnet system, the magnet armature of which is usually designed as a linearly movable component composed of a layered sheet metal work, which is moved or pressed under the force of compression springs, preferably two in number, from the attracted position into the dropped position.
  • a contact carrier to which the movement of the magnet armature is transmitted, is connected to the magnet armature.
  • a device of the type mentioned in which the hinged anchor is mounted in a knife-edge bearing, which has a cutting edge on the hinged anchor and an approximately U-shaped component fastened by the yoke and a yoke is formed.
  • the U-shaped component comprises part of the hinged anchor and between the free leg of the component and an extension attached to the hinged anchor there is a return spring which continuously urges the hinged anchor in the opening direction and at the same time presses it into its cutting edge bearing.
  • the object of the invention is to provide a device of the type mentioned, in which the hinged armature is pressed into the open position by the return spring, the magnetic force required in the device being reduced.
  • the hinged anchor has a cutting edge which engages in the corner formed by the yoke and the wall, which lie tightly against a wall of the housing and thus forms the pivot bearing of the hinged anchor. It is thanks to the return spring that the cutting edge is pressed into this corner.
  • an extension projecting from its pivot bearing is attached to it, which engages in a groove on the housing and thus guides the hinged anchor laterally.
  • a guide element on which the extension is molded is preferably fastened on the surface facing away from the magnetic core.
  • This connecting rod preferably encloses a holding crossbar attached to the contact carrier.
  • This holding crossmember can, for example, be fastened to the contact carrier in a snap-on manner.
  • a convex, approximately circular arc-shaped rolling surface is formed on the lever, the convex side of which is pressed against a pressure surface on the contact carrier and, when the hinged armature and thus also the lever, rolls on the pressure surface on the contact carrier.
  • the pressure surface is preferably formed on the crossmember.
  • the return spring does not execute a linear movement in its own axis, but rather a swiveling movement.
  • the direction of force changes with respect to the hinged armature on one side and to the contact carrier on the other side, so that the restoring force acting on the contact carrier can follow a sine function, whereby savings can additionally be made in the magnet system.
  • the restoring force from one position of the contact carrier to the other position does not correspond to the normal spring characteristic, but rather to the modified spring characteristic, the required force which must be brought about by the magnet system can be reduced. This also makes it possible to use a smaller and therefore less expensive magnet system.
  • the return spring is preferably performed according to the characterizing part of claim 9, whereby buckling of the return spring is prevented (see also DE-OS 33 35 712).
  • the electromagnetic switching device has a lower housing part 10 and an upper housing part 11 connected to it.
  • the lower housing part 10 essentially accommodates the magnet armature system 12, which consists of an L-shaped magnetic yoke 13, a magnetic core 14 and a hinged anchor 15 is formed.
  • the magnetic core 14 is surrounded by a coil 16, which is only indicated schematically in FIG. 1.
  • the hinged armature 15 overlaps both the free yoke surface 18 of the yoke leg 17, which is aligned parallel to the magnetic core 14.
  • the yoke surface 18 forms a corner 20 with the inner wall 19 of the lower housing part 10, into which a cutting edge 21 of the hinged armature 15 is pressed.
  • the corner 20 is the fulcrum of the hinged anchor 15.
  • a guide element 22 is fastened, which has an extension 23 which projects beyond the cutting edge 21 into a groove 24 in the lower housing part 10 and thus ensures a lateral fixation of the hinged anchor 15.
  • the guide element 22 has an eyelet 25 which is penetrated by a connecting rod 26, so that the connecting rod 26 is articulated on the eyelet 25.
  • the guide element 22 also has a cutting edge 27 approximately in its center.
  • the mechanism for resetting the hinged armature has a knee-shaped lever 28 (see FIG. 2), which has a spherical thickening 30 at the free end of its arm 29, with which it rests in a corner 31 on the upper housing part 11, so that a bearing is formed there is, so that a rotation of the lever 28 (also called toggle lever 28) in the bearing 30/31 is possible, but not a shift up or right.
  • the other arm 32 of the toggle lever 28 is shown in more detail in FIG. 2.
  • the arm 32 On the one hand, it has on its inside two horns 34 and 33 which are spaced apart from one another and between them a convex surface 35 which runs in the form of a circular arc and with which the arm 32 against a crossbar 36 on a contact carrier 37 (see FIG. 1) of the contactor is present.
  • the arm 32 On the outside, that is to say the side facing the folding anchor, the arm 32 on the other hand has a wedge-shaped nose 39. This nose 39 is located essentially exactly opposite the nose 27 on the guide element 22.
  • a return spring 40 is engaged between the nose 39 and the nose 27 and is held by a spring guide element 41.
  • the spring guide element is bent in a U-shape and has at the free leg ends support plates 42 and 43 which have nubs 44 on the opposite sides, which serve to guide the helical compression spring 40.
  • the support plates 42 On their outer surfaces, the support plates 42 have V-shaped depressions 45 and 46 which interact with the lugs 27 and 39. It has been found that such a U-shaped spring guide element prevents the spring 40 from buckling when actuated. This is attributable to the fact that on the one hand the free movement of the two support plates 42 and 43 is made possible, but because of the bracket 41, simultaneous pivoting of the two support plates is prevented.
  • the connecting lever 26 has an opening 50 through which the cross member 36 extends so that the folding armature is connected to the contact carrier via the connecting lever or the connecting rod 26.
  • the system formed from the hinged anchor 15, the spring 40 and the toggle lever 28 has a dead center position which is defined by the connecting line TT of the pivot point of the hinged anchor and the pivot point of the toggle lever 28.
  • the lever arrangement is designed so that it generally does not exceed its dead center position TT.
  • FIG. 3 shows the arrangement according to FIG. 1 in the tightened state.
  • the hinged anchor 15 is located in the vicinity of the magnetic yoke or the core 14 and at a slight distance a from it, so that the hinged anchor does not stick.
  • the spring 40 is compressed, due to the arrangement of the nose 39 in relation to the thickening 30 and thus the support of the toggle lever 28; by pivoting the lever elements, the distance between the two lugs 27 and 39 has decreased.
  • the lever arrangement is still above the connecting line T-T, which represents the dead center position.
  • the spring 40 has not only been compressed during the movement of the lever system, but it has also pivoted at an angle in its direction of force with respect to the pivot point T and the direction of movement of the contact carrier 37.
  • the force components of the support force of the folding anchor and that component which runs in the direction of movement of the contact carrier have changed in accordance with a sine function when pivoting the spring 40. This can be explained with reference to FIG. 4.
  • a graphical representation of the required or necessary contact force or restoring force K over the actuation path S can be seen.
  • Curve A is the force demand curve of a normal contactor, in which the restoring spring is only compressed linearly.
  • the curve has an area A1 in which only the return springs are compressed, and starting from the "contacts open" position, which corresponds to the dropped state of the magnet system. After a certain distance, the contacts close, so that at S s the curve A jumps from the area A1 to the area A2, the slope A2 representing a curve which corresponds to the coupled spring elasticity of the return spring and the contact force springs.
  • the curve M A indicates the magnetic force to be achieved with the magnet system; in any case, it must always be greater than the contact forces in order to always be able to overcome the forces which result from the return spring or the return springs and the contact force springs. Accordingly, curve M A is always above curve A.
  • curve A changes to curve B; the sine function when swiveling the spring results in a curve that slopes slightly in the direction of "closing the contacts".
  • Any desired curve or curve curve B can of course be achieved by means of a suitable geometric design. On the one hand, you can achieve an even stronger drop; you can achieve an almost constant curve B or you can approximate the curve of the force curve A. It has proven to be optimal to design curve B so that it drops slightly in the direction of the closing movement.
  • the curve B is then clearly below the area A 1, specifically by the amount E in the point S s . Accordingly, the area A2 shifts downward by the amount E, although the curve B2 is not parallel to the area A2 and also not parallel to the curve B in the area to the left of the point of contact closure.
  • the actual magnetic force demand curve generated in this way is the curve M B , which is clearly below the curve M A , from which it can be seen that the magnet system can be designed to be weaker than that of commercially available arrangements.
  • the contact point of the lever 28 on the cross member 36 is, as mentioned above, designed as an arcuate surface 35. As a result, there is more rolling of the surface 35 on the cross member 36 when the lever 28 is pivoted than a displacement, so that the frictional force between the cross member 36 and the rolling surface 35 is also reduced, as a result of which the force requirement of the magnet system can be reduced even further.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Breakers (AREA)
  • Control Of Vehicles With Linear Motors And Vehicles That Are Magnetically Levitated (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Relay Circuits (AREA)

Claims (9)

  1. Dispositif de rappel du porte-contact (37) d'un coupe-circuit électromagnétique, comprenant un système magnétique à armature battante (15), qui est reliée au porte-contact (37) par une tige de liaison (26), et un ressort de rappel qui porte par une extrémité contre l'armature battante (15) et qui repousse l'armature battante, mobile en rotation autour d'un palier de pivotement fixe, et donc le porte-contact dans la position initiale, de manière que le ressort de rappel (40) produit en permanence une composante de force poussant l'armature battante (15) dans son palier de pivotement et une composante de force agissant dans la direction de fermeture du porte-contact, caractérisé par le fait que le ressort de rappel (40) porte par son autre extrémité contre un levier (28) articulé sur le boîtier (11) et en appui contre le porte-contact (37), et que l'armature battante (15) mobile en rotation autour du palier de pivotement (20, 21), le ressort de rappel (40) et le levier (28) forment un mécanisme de transmission et les points de raccordement du ressort de rappel (40) sur l'armature battante (15) et sur le levier (28) se trouvent en permanence en dehors de la ligne de jonction (T-T) qui forme une ligne de point mort et relie l'axe médian du palier de pivotement (20, 21) de l'armature battante (15) et l'axe de rotation du levier (28) sur le boîtier.
  2. Dispositif selon la revendication 1, caractérisé par le fait que l'armature battante (15) présente une arête (21) qui pénètre dans l'angle formé par la culasse (13), serrée contre une paroi du boîtier (10), et ladite paroi et formant ainsi le palier de pivotement de l'armature battante (15).
  3. Dispositif selon la revendication 2, caractérisé par le fait que l'armature battante (15) est munie d'une saillie (23) qui s'étend au-delà du palier de pivotement de l'armature, pénètre dans une rainure (24) ménagée dans le boîtier et guide ainsi latéralement l'armature battante.
  4. Dispositif selon la revendication 3, caractérisé par le fait que sur la surface, éloignée du noyau magnétique (14), de l'armature battante (15), il est prévu un élément-guide (22) sur lequel est formée d'une seule pièce la saillie (23).
  5. Dispositif selon la revendication 4, caractérisé par le fait que sur l'élément-guide (22) il est formé d'une seule pièce un oeillet (25) sur lequel est articulée la tige de liaison (26).
  6. Dispositif selon l'une des revendications précédentes, caractérisé par le fait que la tige de liaison (26) entoure une traverse support (36) fixée sur le porte-contact (37).
  7. Dispositif selon l'une des revendications précédentes, caractérisé par le fait que sur le levier (28) il est formé d'une seule pièce une surface de roulement (35) convexe, approximativement en forme d'arc de cercle, dont le côté convexe est appliqué contre une surface de pression du porte-contact et roule sur la surface de pression du porte-contact (37), lors du déplacement de l'armature battante et donc aussi du levier (28).
  8. Dispositif selon la revendication 7, caractérisé par le fait que la surface de pression est formée sur la traverse (36).
  9. Dispositif selon l'une des revendications précédentes, caractérisé par le fait que le ressort de rappel (40) est guidé sur un élément-guide (41) de ressort, qui présente deux plaquettes d'appui pour le ressort de rappel, reliées l'une à l'autre, des rainures (45, 46) en forme de V étant prévues sur la surface extérieure des plaquettes d'appui, rainures qui coopèrent avec des saillies (27, 39) formées d'une seule pièce sur l'élément-guide (22) et sur le levier (28), pour former deux couteaux d'articulation se faisant face.
EP84111280A 1983-10-01 1984-09-21 Dispositif pour le rappel du porte-contact d'un appareil de commutation électromagnétique, en particulier d'un commutateur de protection Expired - Lifetime EP0143927B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84111280T ATE66091T1 (de) 1983-10-01 1984-09-21 Einrichtung zur rueckstellung des kontakttraegers eines elektromagnetischen schaltgeraetes, insbesondere eines schuetzes.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833335732 DE3335732A1 (de) 1983-10-01 1983-10-01 Einrichtung zur rueckstellung des kontakttraegers eines elektromagnetischen schaltgeraetes, insbesondere eines schuetzes
DE3335732 1983-10-01

Publications (3)

Publication Number Publication Date
EP0143927A2 EP0143927A2 (fr) 1985-06-12
EP0143927A3 EP0143927A3 (en) 1987-08-19
EP0143927B1 true EP0143927B1 (fr) 1991-08-07

Family

ID=6210709

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111280A Expired - Lifetime EP0143927B1 (fr) 1983-10-01 1984-09-21 Dispositif pour le rappel du porte-contact d'un appareil de commutation électromagnétique, en particulier d'un commutateur de protection

Country Status (4)

Country Link
EP (1) EP0143927B1 (fr)
JP (1) JPS60150533A (fr)
AT (1) ATE66091T1 (fr)
DE (2) DE3335732A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3335712A1 (de) * 1983-10-01 1985-04-11 Brown, Boveri & Cie Ag, 6800 Mannheim Halter fuer eine auf druck belastbare schraubenfeder
DE3644172A1 (de) * 1986-12-23 1988-07-07 Bbc Brown Boveri & Cie Elektromagnetischer schalterantrieb fuer ein elektrisches schaltgeraet
GB2229038B (en) * 1989-03-07 1994-01-26 Matsushita Electric Works Ltd Electromagnetic contactor
CN111863533A (zh) * 2020-08-06 2020-10-30 南京贝思特信息科技有限公司 一种多功能接触器

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR553976A (fr) * 1920-07-20 1923-06-02 Scintilla Ag Armature élastique d'électro-aimants pour régulateurs de vibrations électriques
US2432899A (en) * 1944-11-16 1947-12-16 Westinghouse Electric Corp Shockproof electromagnetic contactor
GB850641A (en) * 1955-10-20 1960-10-05 British Thomson Houston Co Ltd Improvements in and relating to electromagnetic contactors
DE1210080B (de) * 1959-03-25 1966-02-03 Licentia Gmbh Schnappschalter fuer die Sparschaltung von Gleichstrommagneten mit ausserhalb des Magnet-koerpers angeordneten Schaltteilen
US3395259A (en) * 1965-06-16 1968-07-30 Smith Corp A O Electromagnetic contactor having improved knife-edge pivoted armature structure, insulating stop means and releasable arc shield
ES411949A1 (es) * 1973-02-15 1976-01-01 Llario Sole Unos perfeccionamientos en la fabricacion de relevadores e-lectromagneticos.
IT1059599B (it) * 1975-04-15 1982-06-21 Int Standard Electric Corp Rele di tipo minatura perfezionato
DE2805424C2 (de) * 1978-02-09 1982-05-19 Schaltbau Gesellschaft mbH, 8000 München Elektromagnetisches Schütz mit Klappankerantrieb

Also Published As

Publication number Publication date
DE3484893D1 (de) 1991-09-12
DE3335732A1 (de) 1985-04-11
JPS60150533A (ja) 1985-08-08
EP0143927A2 (fr) 1985-06-12
EP0143927A3 (en) 1987-08-19
ATE66091T1 (de) 1991-08-15
DE3335732C2 (fr) 1988-09-22

Similar Documents

Publication Publication Date Title
WO1998048436A1 (fr) Appareil de commutation electromagnetique
EP1394831B1 (fr) Interrupteur électromécanique commandé à distance
EP0326116B1 (fr) Disposition de contacts pour un relais
EP0143927B1 (fr) Dispositif pour le rappel du porte-contact d'un appareil de commutation électromagnétique, en particulier d'un commutateur de protection
DE2149437C3 (de) Vakuumschaltgerät mit Kraftantrieb
DE2228096C3 (de) Elektrischer, mechanisch betätigter Sprungschalter
DE4022078A1 (de) Leistungsschalter mit unabhaengiger verklinkungseinrichtung des bewegbaren schaltkontaktes
EP0471893A2 (fr) Jeu de ressorts de contact pour des courants électriques forts
DE2019352B2 (de) Oberwalzen-Trag- und Belastungsvorrichtung
EP0134293A1 (fr) Dispositif de commutation en particulier pour interrupteurs limiteur ou boutons poussoir limiteur
WO2002027739A1 (fr) Agencement de contact de commutation d'un disjoncteur basse tension presentant des ressorts de force de contact
DE2314069A1 (de) Mechanische verblockung fuer zwei betaetigungsglieder
EP0432299B1 (fr) Contacteur pour courant alternatif
DE2923019C2 (de) Hochspannungsschalter
EP1042710B1 (fr) Dispositif de blocage
DE69212228T2 (de) Ferngesteuerter Schalter mit schwenkbarem Kontakt
DE2417236C3 (de) Schalterantrieb mit einem Linearmotor
EP0949643B1 (fr) Appareil de commutation électrique, notamment appareil de commutation électromagnétique avec interrupteur à vide
DE2805020C2 (de) Elektrisches Schaltgerat
DE3413018A1 (de) Hilfsschalter
DE2911252C2 (de) Schnappschalter mit Kontaktbrücken
DE4325324C1 (de) Wechselstromschütz
EP0338969B1 (fr) Armoire de commutation avec un appareil interrupteur de basse tension
EP0515729B1 (fr) Appareillage interrupteur électromagnétique, en particulier contacteur
DE10110648A1 (de) Schalter, insbesondere elektrischer Fensterhebe- oder Schiebedachschalter für Fahrzeuge, Schaltsystem und Verfahren hierzu

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19880208

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ASEA BROWN BOVERI AKTIENGESELLSCHAFT

17Q First examination report despatched

Effective date: 19900627

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19910807

Ref country code: GB

Effective date: 19910807

Ref country code: BE

Effective date: 19910807

REF Corresponds to:

Ref document number: 66091

Country of ref document: AT

Date of ref document: 19910815

Kind code of ref document: T

ET Fr: translation filed
REF Corresponds to:

Ref document number: 3484893

Country of ref document: DE

Date of ref document: 19910912

ITF It: translation for a ep patent filed

Owner name: DE DOMINICIS & MAYER S.R.L.

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19910921

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19920902

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19930830

Year of fee payment: 10

Ref country code: CH

Payment date: 19930830

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19930902

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19930922

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19940930

Ref country code: CH

Effective date: 19940930

EUG Se: european patent has lapsed

Ref document number: 84111280.8

Effective date: 19940410

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19950531

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19950601

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST