EP0046921B1 - Agencement pour retenir les ressorts de rappel de la palette mobile dans un appareil de commutation électromagnétique - Google Patents

Agencement pour retenir les ressorts de rappel de la palette mobile dans un appareil de commutation électromagnétique Download PDF

Info

Publication number
EP0046921B1
EP0046921B1 EP81106400A EP81106400A EP0046921B1 EP 0046921 B1 EP0046921 B1 EP 0046921B1 EP 81106400 A EP81106400 A EP 81106400A EP 81106400 A EP81106400 A EP 81106400A EP 0046921 B1 EP0046921 B1 EP 0046921B1
Authority
EP
European Patent Office
Prior art keywords
pin
spring
cutout
arrangement according
engages
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
Application number
EP81106400A
Other languages
German (de)
English (en)
Other versions
EP0046921A2 (fr
EP0046921A3 (en
Inventor
Robert Schlager
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.)
BBC Brown Boveri AG Germany
Original Assignee
Brown Boveri und Cie 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 Brown Boveri und Cie AG Germany filed Critical Brown Boveri und Cie AG Germany
Priority to AT81106400T priority Critical patent/ATE12557T1/de
Publication of EP0046921A2 publication Critical patent/EP0046921A2/fr
Publication of EP0046921A3 publication Critical patent/EP0046921A3/de
Application granted granted Critical
Publication of EP0046921B1 publication Critical patent/EP0046921B1/fr
Expired 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
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/20—Movable parts of magnetic circuits, e.g. armature movable inside coil and substantially lengthwise with respect to axis thereof; movable coaxially with respect to coil
    • H01H50/22—Movable parts of magnetic circuits, e.g. armature movable inside coil and substantially lengthwise with respect to axis thereof; movable coaxially with respect to coil wherein the magnetic circuit is substantially closed
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H01H50/04—Mounting complete relay or separate parts of relay on a base or inside a case
    • H01H50/041—Details concerning assembly of relays
    • H01H50/045—Details particular to contactors

Definitions

  • the invention relates to an arrangement for holding helical armature return springs in an electromagnetic switching device provided with a fixedly arranged magnetic core and a movable magnetic armature connected to a contact carrier, in particular a contactor, in which the return spring in an approximately cylindrical housing recess of the part of the housing which receives the magnetic core captive but detachable by means of an axially guiding spring which holds one end of the spring overlapping pin made of plastic, the first end of which engages behind an undercut of the wall of the cylindrical housing recess by means of a radially projecting nose and the second end of which is supported on the contact carrier.
  • Retainer springs are known from DE-A-1 614 342 and DE-A-2 026 299.
  • the springs are held on an expansion part that can be snapped behind a fixed heel.
  • a snap connection to the contact bridges or the housing of the switching device which can be easily or difficultly detachable, can be established and the assembly of an electromagnetic switching device provided with return springs is simplified because the return springs are fixed in position with the plastic expansion parts by simply snapping them into place.
  • An arrangement in which no additional spaces or additional parts lying outside the spring diameter are required has also become known in DE-B-1 256 300.
  • the assembly with the known brackets is relatively simple: you only have to insert the expansion part into the opening until the expansion lugs reach behind a shoulder. Disassembly, however, is quite complicated.
  • the object of the invention is to admit an arrangement of the type mentioned in the introduction, in which the holder of the return springs is designed in such a way that the springs can be removed and reinserted simply from the top of the housing.
  • cylindrical housing recess over a partial length has an open only towards the pin insertion end of the housing recess towards the end groove into which the radially projecting nose of the pin after its insertion into the housing recess and corresponding rotation under the action of the return spring snaps into place like a bayonet.
  • An advantageous embodiment of the invention is characterized in that the end of the pin which is supported on the contact carrier is flattened on part of its circumference and engages in a recess in the contact carrier, the cross section of which is adapted to the cross section of the second end of the pin which is formed by the flattening.
  • a further embodiment of the invention can provide that in the cylindrical housing recess there is a second longitudinal groove which leads the nose of the pin when it is inserted into the housing recess, to which an extended swiveling of the nose to the first groove is located in the lower region of the housing recess enabling area connects.
  • the return spring or the return springs can be easily assembled or disassembled in the housing.
  • For assembly it is necessary to insert the pin with its nose through the groove and push it downward against the force of the return spring until the nose reaches the area that allows the nose to pivot. Then the pin is pivoted until the nose can get into the second groove, whereby the pin can be moved in its axis but is secured against rotation. Because of the flattening of the pin, it is also guided with respect to the contact carrier.
  • the return springs When changing the bobbin, i.e. after removing the switching chambers, the return springs remain protected in the housing in the working position, while only the upper part of the pin protrudes outwards, i.e. towards the switching chamber.
  • An electromagnetic switching device has a housing 10 with an upper housing part 11 and a housing base 13, a lateral extension 12 being formed on the latter, by means of which the switching device can be attached to a wall.
  • a contact carrier 14 is guided in the housing 10, the contact bridges of which are not shown further.
  • a magnetic core 16 in an E-cut is inserted in the housing 10, on the central leg of which a coil body 18 with a winding 20 is attached.
  • the magnetic core 16 has pole faces 22.
  • a magnet armature 24 is firmly connected in a manner not shown.
  • the magnet armature 24 is attracted by the magnetic core 16 when the current flows through the winding 20, the pole faces 26 striking the pole faces 22.
  • the contact carrier 14 is reset by means of armature return springs 28, only one of which is visible in FIG. 1, from the tightened position to the position shown in FIG.
  • This return spring 28 rests with its one spring end 30 against a shoulder 32 in the housing 10, whereas the other end rests against a shoulder 34 on a pin 36 which can be moved in the switching direction.
  • the pin 36 has a first section 38 with a comparatively small diameter, which extends through an opening 40 in the housing.
  • a radially projecting nose 42 (see FIG. 3) is formed on one end lying at the bottom and engages behind a shoulder 44 or recess 44 in the assembled state (see FIGS. 1 and 2).
  • the opening 40 is divided into two sections, one area 46 of which has a diameter which corresponds to the first section 38, a second groove 48 running through the opening 40 in its entirety being provided, the dimensions of which correspond to the nose 42. From the lower floor surface, the opening 40 widens into an enlarged region 41, which merges into a first groove 50 which runs up again, that is to say upwards towards the section 46 at a distance n from the lower floor surface paragraph 44 is limited. The area 41 merges into the section 46 via a step 43.
  • the pin 36 has a second section 52 with an enlarged outer diameter compared to the first section 38, which merges into a third section 54, which also has an enlarged diameter compared to the section 52.
  • the transition from section 52 to section 54 is formed by shoulder 34, against which return spring 28 bears.
  • an extension 56 is provided in the area of the shoulder 32 and the outer diameter of the shoulder 52 approximately corresponds to the inner diameter of the spring windings.
  • a recess 58 is provided on the contact carrier 14, which engages in the upper end 62 of the pin 36.
  • the pin 36 is now pressed due to the pressure of the spring 28 in the direction of arrow A, whereby the contact carrier 14 is also spring-loaded in the direction of arrow A.
  • section 52 of pin 36 has a triangular design, which cannot be seen from FIG. 1. If the switching chamber in the upper housing part 11 is removed with the contact carrier 14 when the bobbin is changed and the spring 28 presses the pin 36 in the direction of arrow A, then the nose acts together with the recess 44 as a stop for limiting the movement of the pin 36, so that the return spring 28 also the pin remains protected in the working position in the housing 10 during the coil change. The switching chamber can therefore be replaced without special care after changing the bobbin.
  • the triangular shape of the pin 36 also serves to reduce the frictional force that the return spring 28 must also overcome.
  • the pin 36 is received together with the return spring 28 in a recess 64 in the housing.
  • the outer diameter of the third section 54 is approximately the same size as the inner diameter of the recess 64.
  • the housing 10 is closed by a separating joint 66 separated from it - the upper housing part (switching chamber) 11, which surrounds the contact carrier 14.
  • a segment-like notch 68 is provided in the pin 36, which runs perpendicular to the longitudinal axis of the pin 36 and into which a driver, not shown, engages a mechanical locking device which can be fitted as an additional device and is arranged between two switching devices.
  • the pin 36 itself is shown in Figures 3 to 6. It can be seen in FIG. 6 that the pin 36 still has a flattened portion in its upper region, which is used for better guidance or to prevent rotation. For this purpose, a recess 58 is not shown.
  • An extension 71 is formed in the area of the shoulder 34, offset by approximately 11 m at 90 ° C. with respect to the nose, which, starting from the third section 54 and at a distance parallel to the second section 52, points in the direction of the nose 42 and thereby a distance to the second section 52.
  • This extension 71 protects the return spring 28, which would be visible from the outside in a slot 74 in the housing if the extension were not present.
  • the electromagnetic contactor or the contact carrier of the same After placing the upper part of the housing, the electromagnetic contactor or the contact carrier of the same is fully assembled and the upper end 70 or 62 of the pin presses the contact carrier 14 into the off position.
  • FIG. 9 shows a pin 80 whose upper region 70 with a flat or segment-like recess 68 is of the same design as the pin 36 of FIGS. 3 to 6.
  • the lower part of the pin 80 is sleeve-like and has a blind hole 82 which extends approximately over half of the pin 80.
  • a nose 84 is provided on the outer surface of the pin 80 which corresponds to the nose 42 of the pin 36.
  • Figure 7 shows the housing without a pin.
  • a recess 86 in the form of a blind hole can be seen, the inside diameter of which corresponds to the outside diameter of the pin 80.
  • a groove 88 which extends radially and extends over the entire length of the recess 86 is provided for carrying out the lug 84 during assembly, the recess 92 having an enlarged region 94 in its lower region 92.
  • the remaining part of the return spring 102 engages inside the pin 80 and is guided in the pin 80 in the blind hole 82.
  • This area 94 is a segment of a circle, the included angle being an acute angle.
  • This angle can of course also be an obtuse angle: it can also be 180 ° and more, whereby the angle must not be 360 °, because a residual wall part must always be provided to form the bottom 98 and to arrange the pin. This remaining wall part must absorb the force of the return spring and the shocks and vibrations that occur during switching, so that it must be dimensioned accordingly.
  • a first groove 104 which, starting from the area 94, extends to the upper area of the housing, approximately to the tip of the pin 100.
  • the lug 84 slides through the groove 88 and reaches the area 94.
  • the pin 80 is then rotated in the area 94 until the lug 84 reaches the area of the groove 104.
  • the pin is released and the nose 84 can — as shown in FIG. 8 — rest against the end of the groove 104 under the pressure of the return spring 102.
  • the groove 104 then prevents the pin from twisting and jumping out.
  • the advantage of the arrangements according to the invention is that both can be assembled and disassembled from the working position in both, with no special tools for locking and unlocking being required. Rather, one only has to move and twist the pin or pins together with the springs in the groove and then the pin is in its working position due to the spring, the notch 68 being aligned with the slot 74 of the housing, so that a coupling pin is on the outside , e.g. a mechanical lock, can engage in the notch 68 and can be positively and non-positively coupled with the pin. Disassembly is done in the same, very simple way.
  • Figure 12 shows the housing 10 for simplicity in both versions from above with indicated bobbin 18; the recesses 64 and 86 for inserting the pins are arranged diagonally opposite one another. In this way, an optimal force distribution is achieved and the contact area on the contact carrier 14 is fully available for the contact assembly, since the return springs are arranged outside of this area.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Push-Button Switches (AREA)
  • Electronic Switches (AREA)
  • Vehicle Body Suspensions (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Springs (AREA)

Claims (11)

1. Agencement de retenue de ressorts héli- coîdaux (28, 102) de rappel d'induit dans un appareil de commutation électromagnétique muni d'un noyau magnétique occupant une position fixe et d'un induit magnétique (24), mobile et relié à un support de contact (11), en particulier dans un contacteur-disjoncteur, agencement dans lequel le ressort de rappel (28, 102) est maintenu imperdable mais amovible dans un évidement cylindrique (64, 86) de la partie du boîtier (10) logeant le noyau magnétique (16), au moyen d'un tenon en matière plastique (36, 80) qui guide axialement le ressort, coiffe une extrémité de ce ressort et dont la première extrémité vient en prise par-derrière, au moyen d'un ergot (42, 84) saillant radialement, avec une contre- dépouille de la paroi de l'évidement cylindrique (64, 86) du boîtier, sa seconde extrémité (70) étant en appui contre le support de contact (14), caractérisé par le fait que l'évidement cylindrique (64, 86) du boîtier présente, sur une partie de la longueur, une première gorge (50, 104) qui est seulement ouverte en direction de l'extrémité tournée à l'opposée de l'extrémité de l'évidement (64, 86) du boîtier destinée à l'introduction du tenon, et dans laquelle l'ergot (42, 84) saillant radialement du tenon (36, 80) s'encliquette à la manière d'une fermeture du type baïonnette, après l'introduction dudit tenon dans l'évidement (64, 86) du boîtier et après une rotation correspondante, sous l'action du ressort de rappel (28, 102).
2. Agencement selon la revendication 1, caractérisé par le fait que l'extrémité (70) du tenon (36, 80) en appui contre le support de contact (14) est aplatie sur une partie de sa périphérie et s'engage dans un renfoncement (58) du support de contact (14), dont la section est adaptée à la section de la seconde extrémité (70) du tenon à laquelle le méplat donne naissance.
3. Agencement selon l'une des revendications 1 et 2, caractérisé par le fait qu'il est prévu, dans l'évidement cylindrique (64, 86) du boîtier, une seconde gorge (48, 88) qui s'étend longitudinalement, guide l'ergot (42, 84) du tenon (36, 80) lors de l'introduction de ce dernier dans l'évidement (64, 86) du boîtier, et à laquelle se raccorde, dans la zone inférieure de l'évidement (64, 86) du boîtier, une région élargie (41, 94) autorisant le pivotement de l'ergot (42, 84) par rapport à la première gorge (50, 104).
'4. Agencement selon la revendication 3, caractérisé par le fait que la région élargie (41, 94) est réalisée en forme de secteur circulaire.
5. Agencement selon l'une des revendications précédentes, caractérisé par le fait que le tenon (36, 80) comporte une encoche (68) qui est orientée perpendiculairement à l'axe longitudinal pour recevoir un organe d'entraînement d'un verrouillage mécanique.
6. Agencement selon l'une des revendications précédentes, caractérisé par le fait que le tenon (30) traverse axialement le ressort (28) de part en part, et coiffe l'une des extrémités de ce ressort par un épaulement (34).
7. Agencement selon la revendication 6, caractérisé par le fait que le tenon (36, 80) présente une section triangulaire sur une zone partielle de sa longueur.
8. Agencement selon l'une des revendications 1 à 5, caractérisé par le fait que le tenon (80) possède un trou borgne central (82) qui reçoit et guide le ressort de rappel (102).
9. Agencement selon la revendication 8, caractérisé par le fait que le tenon (80) possède une section en forme d'étoile.
10. Agencement selon la revendication 9, caractérisé par le fait que le trou borgne (82) possède une section triangulaire.
11. Agencement selon l'une des revendications 7 à 10, caractérisé par le fait que l'évidement cylindrique (86) du boîtier est réalisé en tant que trou borgne; et par le fait qu'un téton (100), pénétrant dans l'espace interne de la douille (80) et servant à guider le ressort de rappel (102) et le tenon (80), est venu de moulage avec le fond (98) du trou borgne.
EP81106400A 1980-08-30 1981-08-18 Agencement pour retenir les ressorts de rappel de la palette mobile dans un appareil de commutation électromagnétique Expired EP0046921B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81106400T ATE12557T1 (de) 1980-08-30 1981-08-18 Anordnung zur halterung von schraubenfoermigen ankerrueckstellfedern in einem elektromagnetischen schaltgeraet.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3032724 1980-08-30
DE19803032724 DE3032724A1 (de) 1980-08-30 1980-08-30 Elektromagnetisches schaltgeraet

Publications (3)

Publication Number Publication Date
EP0046921A2 EP0046921A2 (fr) 1982-03-10
EP0046921A3 EP0046921A3 (en) 1982-09-29
EP0046921B1 true EP0046921B1 (fr) 1985-04-03

Family

ID=6110751

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81106400A Expired EP0046921B1 (fr) 1980-08-30 1981-08-18 Agencement pour retenir les ressorts de rappel de la palette mobile dans un appareil de commutation électromagnétique

Country Status (3)

Country Link
EP (1) EP0046921B1 (fr)
AT (1) ATE12557T1 (fr)
DE (1) DE3032724A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE513442C2 (sv) * 1999-01-28 2000-09-11 Asea Brown Boveri Kontaktor

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH48812A (de) * 1910-07-28 1910-12-01 Gottlieb Straub Vorrichtung zur lösbaren Verbindung zweier Körper
NL291054A (fr) * 1962-04-24
DE1614342A1 (de) * 1966-05-24 1970-05-27 Pirelli Mehrpoliges elektromagnetisches Relais mit umkehrbaren Kontakten
DE1625369A1 (de) * 1967-11-27 1970-07-16 Honeywell Gmbh Vorrichtung zum Befestigen mehrerer Platten im Abstand uebereinander
CH512819A (de) * 1969-07-15 1971-09-15 Sprecher & Schuh Ag Wechselstromschütz
DE2124295A1 (de) * 1971-05-15 1972-11-30 Metzenauer & Jung Gmbh Elektromagnetisches Schütz
DE7235951U (de) * 1972-09-29 1976-04-15 Siemens Ag, 1000 Berlin Und 8000 Muenchen Elektromagnetisches Schaltgerät
DE2360907B2 (de) * 1973-12-06 1981-02-05 Siemens Ag, 1000 Berlin Und 8000 Muenchen Anordnung zur Halterung von Federn
FR2257141B1 (fr) * 1974-01-03 1978-03-10 Telemecanique Electrique

Also Published As

Publication number Publication date
ATE12557T1 (de) 1985-04-15
DE3032724C2 (fr) 1989-04-06
EP0046921A2 (fr) 1982-03-10
DE3032724A1 (de) 1982-04-29
EP0046921A3 (en) 1982-09-29

Similar Documents

Publication Publication Date Title
EP1166003A1 (fr) Piece de raccordement d'un dispositif de raccordement fluidique, notamment un raccord souple, et dispositif de raccordement fluidique
DE3507151C2 (de) Kupplungsglied für eine Schnellkupplung
EP0271594B1 (fr) Dispositif de serrage
AT2249U1 (de) Handstempel mit selbstfärbeeinrichtung
DE102016117538A1 (de) Elektrischer Steckverbinder
DE3149310A1 (de) Vorrichtung und verfahren zur befestigung von elektrischen installationsgeraeten auf normprofilschienen, insbesondere auf hutprofilschienen
AT2996U1 (de) Achssicherung für die schwenkachse eines handstempels sowie handstempel
EP0046921B1 (fr) Agencement pour retenir les ressorts de rappel de la palette mobile dans un appareil de commutation électromagnétique
DE8101384U1 (de) Drucktastenschalter
WO1991019116A1 (fr) Unite de guidage et montage de ressorts de pression
DE3940647C2 (fr)
EP0193866B1 (fr) Poignée de porte
EP2072441A2 (fr) Tambour à câble
DE4005136A1 (de) Elektrisches installationsgeraet, insbesondere schutzkontaktsteckdose mit einer kinderschutzsicherung
DE2526002C3 (de) Schalter
DE3225147A1 (de) Elektromagnetisches relais mit mechanischer anzeigevorrichtung fuer die ankerstellung
DE4413385C2 (de) Vorrichtung zum seitlichen Verbinden wenigstens zweier Installationsgeräte
DE3115540A1 (de) Unterspannungs-rueckstellvorrichtung fuer einen drehschalter
DE3507360C2 (fr)
EP0063312A1 (fr) Support d'enroulement téléscopique
DE3210033C2 (fr)
DE2544025C2 (de) Federverriegelung für Steckverbindungen
DE3046831A1 (de) Elektrischer schalter, insbesondere druckknopfschalter
DE4039066C1 (en) Connector for pressurised pipes with recessed housing
EP0428936A1 (fr) Prise de securité pour enfants

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 FR GB IT NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

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

17P Request for examination filed

Effective date: 19820908

ITF It: translation for a ep patent filed

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

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

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

REF Corresponds to:

Ref document number: 12557

Country of ref document: AT

Date of ref document: 19850415

Kind code of ref document: T

ET Fr: 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: AT

Payment date: 19860704

Year of fee payment: 6

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

Ref country code: NL

Payment date: 19870831

Year of fee payment: 7

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

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19880818

Ref country code: AT

Effective date: 19880818

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

Ref country code: SE

Effective date: 19880819

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

Ref country code: BE

Effective date: 19880831

BERE Be: lapsed

Owner name: BROWN BOVERI & CIE A.G.

Effective date: 19880831

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

Ref country code: NL

Effective date: 19890301

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19890831

Ref country code: CH

Effective date: 19890831

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: FR

Payment date: 19910628

Year of fee payment: 11

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

Ref country code: FR

Effective date: 19930430

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 81106400.5

Effective date: 19890510