EP0202317A1 - Schmelzsicherungseinsatz mit optoelektrischer anzeigeeinrichtung. - Google Patents
Schmelzsicherungseinsatz mit optoelektrischer anzeigeeinrichtung.Info
- Publication number
- EP0202317A1 EP0202317A1 EP86900088A EP86900088A EP0202317A1 EP 0202317 A1 EP0202317 A1 EP 0202317A1 EP 86900088 A EP86900088 A EP 86900088A EP 86900088 A EP86900088 A EP 86900088A EP 0202317 A1 EP0202317 A1 EP 0202317A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuse
- fuse link
- electrically conductive
- resistance
- layer
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
- H01H85/046—Fuses formed as printed circuits
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/30—Means for indicating condition of fuse structurally associated with the fuse
- H01H85/32—Indicating lamp structurally associated with the protective device
Definitions
- a fuse element with an insulating body in which a fuse element embedded in an extinguishing agent is arranged between two contacts.
- a glow lamp with a high-impedance series resistor connected in series is provided in a identification current path and is used to enable a clearly visible status display of the fuse link to replace mechanical identification devices on electrical fuse systems with a reliable, clearly visible, illuminated status display.
- any optoelectric display device for example a filament lamp, a light-emitting diode, or a liquid crystal display, which is designed in parallel with the fuse element via an identification current path, can be provided.
- an electrical fuse which consists of a translucent sheathing and a fuse conductor arranged inside the sheathing and a circuit connected to the fuse conductor and connectable to the feed line.
- the optoelectric display device is formed from a light-emitting diode which is connected in series with a resistor arrangement, the light-emitting diode being arranged within the casing and with the resistor arrangement in this way is connected to the connection circuit that the light-emitting diode and the resistor arrangement are parallel to the fuse conductor.
- a thermal insulation provided within the casing protects the light-emitting diode from the heat given off when the fuse conductor blows, so that when the fuse conductor blows, the current is passed through the resistor arrangement and the light-emitting diode and thereby indicates a blown electrical fuse.
- a reusable fuse cartridge in the form of a tube with an internal glow lamp in which the glow lamp is connected in series to a high-resistance resistor and several fusible conductors are arranged on the outside of the tube.
- An additional special fuse holder is required for the fuse cartridge.
- the known fuse links with optoelectric status display have, because of the additional components required for the status display in the form of discrete series resistors, a much smaller internal volume that can be used for the extinguishing process of the switch-off arc when the fuse element burns through.
- the breaking capacity or breaking work to be fulfilled by the fuse is very severely restricted, so that the breaking capacity of the fuse link is considerably reduced.
- the breaking capacity of the fuses in question which is specified for D and NH fuse systems in accordance with VDE 0635, VDE 0636, DIN 57635 and DIN 57636 and must be checked before the VDE test mark is issued, does not meet the requirements for known fuse links with optical display device for the fuse state are practically not usable.
- screw caps with integrated light-emitting status indicators are used to indicate the status of a fuse, either a test contact to indicate the fuse status, which must be touched with a finger, or a long contact flag is required, which must be inserted between the fuse link and a fitting ring into the fuse base . Both embodiments are complex in their construction and difficult to handle by the user.
- the invention specified in claim 1 has for its object to provide a fuse link with an optoelectric display device for status indication of the fuse, which ensures a switch-off work that corresponds to that of a fuse link without an optoelectric display device, which is easy to manufacture, easy to handle in operational use and increased Security requirements are sufficient.
- the fuse insert according to the invention by optimizing the internal volume utilization of the fuse insert, the maximum switch-off work of the fuse is increased and with additional arrangement Adjustment of the state of the fuse, optoelectric display device of the disconnection work or the breaking capacity of a fuse without optoelectric display device.
- the fuse link according to the invention with optoelectric display device is easy to manufacture in terms of production technology and easy to handle in operational use.
- the fuse link according to the invention also meets increased safety requirements when operating the fuse.
- One or more discrete resistance elements can be replaced by an electrically conductive, high-resistance layer on parts of the surfaces that delimit the insulating body of the fuse link, which is usually made of ceramic, which means a significantly better volume utilization, a simpler structure and a simplification of the manufacture of fuse elements with optoelectric Display device is possible. If the electrically conductive coating extends between the two fuse link contacts, the electrically conductive, high-resistance layer can be formed as a voltage divider. As a result, the required dielectric strength of the optoelectric display element can be greatly reduced.
- the network can optionally also be designed as a resistance network, which preferably consists of an insert made of electrically conductive, high-resistance material, which can be inserted into the interior of the hollow insulating material body.
- a resistance network which preferably consists of an insert made of electrically conductive, high-resistance material, which can be inserted into the interior of the hollow insulating material body.
- Such an insert is a simple, inexpensive part that, for example, consists of conductive plastic can be produced by injection molding, which ensures simple assembly and easy attachment and contacting of the optoelectric display element, for example, by heating the contacts and pressing into the plastic insert.
- the properties of conventional fuses must be retained so that the optoelectronic lighting fuses comply with the standards and guidelines.
- the components of the new detector must therefore in particular not reduce the switching chamber volume and dielectric strength relevant for the maximum breaking capacity, reduce the insulation resistance to a value less than 100 kilohm and do not change the time / current behavior and selectivity compared to conventional fuses. All other features are not affected when the construction is preserved. This is achieved by the design of the resistors as a high-resistance layer or by a conductive, high-resistance insert with an optoelectric display element arranged thereon on the fuse link body. The maximum breaking capacity of the fuse link is therefore retained. The time / current behavior and the selectivity are also not changed because of the unchanged fuse element.
- the high-resistance layer extends over the entire distance of the insert contacts, it has no influence on the dielectric strength.
- the insulation resistance is specified by the minimum light-emitting diode current and set via the resistance layer material and the geometric dimensions of the high-resistance layer.
- the resistance value between the fuse link contacts can be approximately 125 kilo-ohms become.
- the electrically conductive, high-resistance layer can optionally be produced by spraying, brushing, pouring, injection molding, gluing, rolling, galvanizing or coating, and by combinations of the aforementioned application processes.
- the electrically conductive, high-resistance layer can cover all or only parts of the area delimiting the insulating body of the fuse.
- the resistance network can optionally be designed as a resistance layer in the form of a film with a conductive layer and / or as a conductive, high-resistance film, but the layer material can also consist of a resistance paste, a conductive, high-resistance paint, a conductive plastic and conductive or semiconducting substances. All of these materials are excellently suited for the construction of a resistance network which just fulfills the condition of being inexpensive to produce, since a fuse element must be a simple and inexpensive item that can be replaced at any time at low cost.
- the voltage tap can be simplified and the geome trical location of the voltage tap can be chosen approximately freely. This is ensured by the embodiment of the invention according to claim 9 or 10, that the layer thickness is different at different geometric locations of the coating and / or the specific resistance of the coating is distributed inhomogeneously and / or the geometric shape of the layer is chosen appropriately.
- the interior volume of the fuse body can be better utilized by appropriately changing the fuse element.
- the fuse element can be extended by single or multiple coiling, kinking, folding, corrugation or by suitable combinations thereof, the fuse element being additionally divided and in addition to the geometric shape of the fuse element in favor of improved volume utilization of the fuse link Inner volume of the ceramic body can be adjusted.
- the electrically conductive, high-resistance layer can be partially or completely covered by a second insulating layer, this protective layer being able to offer thermal and / or electrical and / or mechanical protection, depending on the requirements of the application.
- the electrically conductive, high-resistance layer on the surfaces delimiting the fuse body additionally offers the advantage that, owing to the reduced number of discrete additional components more extinguishing medium can be introduced into the fuse link.
- the existing extinguishing medium is exploited even better by deliberately extending the fuse element. This is advantageously achieved by the single or multiple spiraling, kinking, folding, corrugation or the like described above. of the fuse element.
- the optoelectric display device is spatially separated from the switching chamber by a separating device in the form of a separating layer and / or a shield made of temperature-resistant material, this separation being completely or only partially, e.g. can take place in the vicinity of the fuse element.
- the optoelectric display device is protected mechanically, electrically and thermally, the separating layer being able to be used as a carrier or holder of the contacts of the optoelectric indicating device for connection to the electrically conductive, high-resistance layer, or else the separating layer as a carrier of a hybrid and / or layer circuit consisting of one or more light emitting diodes, a resistance circuit and the necessary connection contacts can be used.
- the electrically conductive, high-resistance layer can be arranged on the outer surface of the fuse link and at least partially covered by an insulating layer.
- the electrically conductive, high-resistance layer with the foot contact or electrically conductively connected to both fuse contacts of the fuse link in which case the optimum supply voltage of the optoelectric display device can be specified.
- An auxiliary contact inside the fuse cap connects an opto-electrical indicator, which is attached or inserted into the cap in a clearly visible manner from the outside, to the electrically conductive, high-resistance layer.
- the second connection of the optoelectric indicator is connected to the contact plate of the cap.
- the optoelectric display device can preferably also be constructed as a hybrid and / or layer circuit which is inserted in an insulated manner in the end-face contact cap.
- the fuse element can be designed as an electrically conductive, low-resistance layer, the electrically conductive, low-resistance layer being produced by spraying, brushing, printing, spraying, casting, gluing, rolling, galvanizing, coating or by suitable combinations thereof can. This further simplifies the manufacture of the fuse link with an optoelectric display device of the fuse state and provides additional space for suitable extinguishing agents to increase the breaking capacity of the fuse link.
- the resistance or voltage and / or current divider network in Form of an outer shell, partial shell and / or sheet of conductive material can be arranged around the insulating body, which is possibly partially insulated and into which the fuse link can be inserted and inserted together with this in the fuse holder.
- the optoelectric display element can be attached as described above in the area of the front contact or on the fuse link body.
- FIG. 1 shows a longitudinal section of a D-fuse link with an electrically conductive, high-resistance coating and a light-emitting diode as a fuse status indicator
- FIG. 2 shows a plan view of an NH fuse link with an electrically conductive, high-resistance layer arranged on the outer surface and two light-emitting diodes as status indicators;
- Fig. 3 shows a cross section through a fuse link with a conductive, high-resistance insert
- Fig. 4 is an isolated view of the conductive, high ohmic insert with optoelectric display element arranged thereon.
- FIG. 1 of a fuse link of a D-fuse system shows a hollow insulating body 1, preferably made of ceramic, on the inner surface 16 delimiting the cavity 15, an electrically conductive, high-resistance layer 2 is applied.
- the electrically conductive, high-resistance layer 2 is guided to or over the front ends of the insulating body 1 in such a way that when the contact caps 3, 4 of the fuse link are pressed on, an electrically conductive connection is produced.
- the electrically conductive, high-resistance layer 12 can optionally be applied to one or more locations on the inner surface 16 of the insulating body 1 and have a different layer thickness and / or an inhomogeneous distribution of the specific resistance of the coating at different geometric locations of the coating, so that different resistance values are indicated different tapping points of the voltage and / or current divider network formed in this way.
- the electrically conductive, high-resistance layer 2 can, for example, be sprayed on as a graphite coating, vapor-deposited as a carbon or metal layer or, as in the exemplary embodiment according to FIGS. 3 and 4, can be produced as an insert body made of electrically conductive, high-resistance material, such as, for example, conductive plastic.
- the light-emitting diode 5 serving as an optoelectric display device is arranged on one end face of the fuse link so that it protrudes through an opening provided in the contact cap 4 and is clearly visible from the outside.
- a first connection contact 6 of the light-emitting diode 5 is clamped under the one contact cap 4, while the other connection contact 9 of the light-emitting diode 5 is designed as a contact spring which presses on the electrically conductive, high-resistance layer 2 via the spatial separating device 7.
- the electrically conductive, high-resistance layer 2 thus forms a voltage divider which is loaded by the light-emitting diode 5.
- the voltage drop in a fuse link with melted fuse element 8 is determined via the local position of the other connection contact 9 of the light-emitting diode 5, which is designed as a contact spring, on the electrically conductive, high-resistance layer 2.
- any desired voltage value can thus be determined and the electrical properties of the fuse link can thus be optimized.
- the fusible conductor 8 can be formed by multiple corrugations, kinks or the like. lengthened, thus optimizing the breaking capacity of the fuse link.
- the insulating body 1 itself can alternatively be designed as an electrically conductive, high-resistance body be, which is at least partially covered with an insulating layer, so that the remaining surfaces of the high-resistance insulating material body form the electrically conductive, high-resistance layer 2.
- FIG. 2 shows a view of an NH fuse link with an optoelectrical display device.
- the electrically conductive, high-resistance layer 2 is applied to the outer surface 17 of the fuse link.
- the fuse link has metallic fuse link contacts 14 protruding from its end faces.
- a first light-emitting diode 5 serving as an optoelectric display device is connected between one of the fuse-link contacts 14 and a first auxiliary contact 11 on the electrically conductive, high-resistance layer 2.
- a second light-emitting diode 10 can optionally or additionally be provided as an optoelectric display device on the outer surface 17 of the fuse link and connected to the electrically conductive, high-resistance layer 2 via a second and third auxiliary contact 12, 13.
- the electrically conductive, high-resistance layer 2 can be covered by an additional insulating layer, not shown, so that the electrically conductive, high-resistance layer 2 is electrically, thermally and / or mechanically is protected.
- a combination of the two exemplary embodiments is likewise possible, the electrically conductive, high-resistance layer 2 being applied partly on the inner surface 16 and partly on the outer surface 17 of the insulating material body 1.
- the optoelectric display device 5 can be introduced into the cap, the electrical connection between the electrically conductive, high-resistance layer on the outside of the fuse link and the optoelectric display device in the cap is produced via an auxiliary contact in the interior of the cap.
- the electrically conductive, high-resistance layer can be replaced by an electrically conductive, low-resistance layer or an electrically conductive wire and a resistor network integrated in the optoelectric display device.
- FIG. 3 shows an example of a resistor network designed as a plastic insert, which consists of electrically conductive, high-resistance plastic.
- This plastic part shown in Fig. 4 is shaped so that it is adapted to the inner surface of the insulating body 1 and can preferably be bent in the area of the contact caps.
- This plastic part can be pressed or punched in a simple manner from a suitable high-resistance plastic, so that large-scale production is possible without any problems.
- This plastic part is then inserted by hand or by machine into the cavity of the insulating body 1 of the fuse link and can be bent, for example, in the area of the lower contact cap 4 by a short heat treatment.
- the plastic part 20 has a widened area into which an optoelectric display element
- the optoelectric display device can optionally be designed as a hybrid and / or layer circuit, which is advantageously inserted insulated in the front contact cap.
- the hybrid circuit consists of a disk-shaped carrier material printed with resistance paste, which can simultaneously serve as a separating device 7, to which a light-emitting diode as an optoelectric display element is applied, for example with a conductive adhesive.
- the hybrid circuit can be clamped between the front contact cap and the insulating body.
- a low-resistance layer or another conductor on the inner surface of the fuse link connects via a con clocks the hybrid circuit with the second fuse contact on the carrier material.
- the resistance network or the high-resistance layer can be designed in the form of an outer shell, partial shell and / or web made of conductive material, which is possibly partially insulated and into which the fuse link is inserted and inserted together with it into the fuse holder becomes.
- the optoelectric display element is attached in the area of the forehead contact so that the light signal can be seen through the viewing window of the screw cap.
Landscapes
- Fuses (AREA)
- Safety Valves (AREA)
- Ink Jet (AREA)
- Control Of Combustion (AREA)
- Air Bags (AREA)
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT86900088T ATE58259T1 (de) | 1984-11-14 | 1985-11-14 | Schmelzsicherungseinsatz mit optoelektrischer anzeigeeinrichtung. |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3441588 | 1984-11-14 | ||
DE3441588 | 1984-11-14 | ||
DE3513833 | 1985-04-17 | ||
DE19853513833 DE3513833A1 (de) | 1984-11-14 | 1985-04-17 | Schmelzsicherungseinsatz mit optoelektrischer anzeigeeinrichtung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0202317A1 true EP0202317A1 (de) | 1986-11-26 |
EP0202317B1 EP0202317B1 (de) | 1990-11-07 |
Family
ID=25826535
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86900088A Expired - Lifetime EP0202317B1 (de) | 1984-11-14 | 1985-11-14 | Schmelzsicherungseinsatz mit optoelektrischer anzeigeeinrichtung |
Country Status (13)
Country | Link |
---|---|
US (1) | US4641120A (de) |
EP (1) | EP0202317B1 (de) |
JP (1) | JPS62500827A (de) |
AT (1) | ATE58259T1 (de) |
AU (1) | AU592966B2 (de) |
BR (1) | BR8507050A (de) |
CA (1) | CA1250873A (de) |
DD (1) | DD239298A5 (de) |
DE (2) | DE3513833A1 (de) |
ES (1) | ES8702738A1 (de) |
HU (1) | HU195026B (de) |
PL (1) | PL151284B1 (de) |
WO (1) | WO1986003054A1 (de) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0744689B2 (ja) * | 1985-11-22 | 1995-05-15 | 株式会社日立製作所 | 動き検出回路 |
US4821010A (en) * | 1987-12-30 | 1989-04-11 | Therm-O-Disc, Incorporated | Thermal cutoff heater |
SE9400036D0 (sv) * | 1994-01-10 | 1994-01-10 | Pharmacia Ab | Low modecular weight hyaluronic acid |
DE19800779B4 (de) * | 1998-01-12 | 2004-09-23 | Klaus Bruchmann | Sicherungshalter mit integrierter Anschlußleitung für Zustandsmelder |
US5994993A (en) | 1998-07-31 | 1999-11-30 | Flexcon Company, Inc. | Fuse indicator label |
AU2001290608A1 (en) * | 2000-08-31 | 2002-03-13 | Rytec Corporation | Sensor and imaging system |
US6456189B1 (en) | 2000-11-28 | 2002-09-24 | Ferraz Shawmut Inc. | Electrical fuse with indicator |
US6859131B2 (en) | 2001-05-25 | 2005-02-22 | Dan Stanek | Diagnostic blown fuse indicator |
TW534450U (en) * | 2002-06-03 | 2003-05-21 | Chuen-Ru Lin | Fuse for breakdown indicator of automobile facilities |
US7405646B2 (en) * | 2002-06-26 | 2008-07-29 | Littelfuse, Inc | Multiple conductor indicator |
AU2003270386A1 (en) * | 2002-09-06 | 2004-03-29 | Rytec Corporation | Signal intensity range transformation apparatus and method |
US20050062579A1 (en) * | 2003-09-23 | 2005-03-24 | Carrier Corporation | Resettable fuse with visual indicator |
US20080048819A1 (en) * | 2005-05-05 | 2008-02-28 | Cooper Technologies Company | Modular Fuseholders With Wireless Communication Capabilities |
US7636028B2 (en) * | 2005-07-20 | 2009-12-22 | Littelfuse, Inc. | Diagnostic fuse indicator including visual status identifier |
US7808362B2 (en) * | 2007-08-13 | 2010-10-05 | Littlefuse, Inc. | Moderately hazardous environment fuse |
US8674803B2 (en) * | 2007-08-13 | 2014-03-18 | Littelfuse, Inc. | Moderately hazardous environment fuse |
WO2019074470A1 (en) * | 2017-10-09 | 2019-04-18 | Keysight Technologies, Inc. | MANUFACTURE OF HYBRID COAXIAL CABLE |
US10806026B2 (en) | 2018-07-12 | 2020-10-13 | International Business Machines Corporation | Modified PCB vias to prevent burn events |
DE102018213522B4 (de) * | 2018-08-10 | 2022-06-02 | Siemens Aktiengesellschaft | Schmelzsicherung, Sicherungskörper, System und Verfahren |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2079214A (en) * | 1936-06-05 | 1937-05-04 | Indicating Fuse Mfg Corp | Indicating fuse |
US2157777A (en) * | 1937-04-08 | 1939-05-09 | Ohio Carbon Company | Resistor |
US2206782A (en) * | 1939-03-06 | 1940-07-02 | Fuse Indicator Corp | Plug fuse |
DE829186C (de) * | 1948-10-02 | 1952-01-24 | Siemens Schuckertwerke A G | Verfahren zur Bemessung des elektrischen Widerstandes von Schmelzleitern |
AU7770575A (en) * | 1974-02-04 | 1976-07-29 | G I P Investments Ltd | Safety fuse |
JPS5336659A (en) * | 1976-09-16 | 1978-04-05 | Guim R | Display device for the disconnection of fuse |
US4148024A (en) * | 1977-03-02 | 1979-04-03 | Westinghouse Electric Corp. | Capacitively coupled indicator for a submersible fuse |
DE3103478A1 (de) * | 1981-02-03 | 1982-08-26 | Bernhard 5900 Siegen Thienel | Schmelzsicherungspatrone |
DE8322638U1 (de) * | 1983-08-05 | 1984-01-05 | Thienel, Bernhard, 5900 Siegen | Schmelzsicherungspatrone |
-
1985
- 1985-04-17 DE DE19853513833 patent/DE3513833A1/de active Granted
- 1985-07-05 ES ES544917A patent/ES8702738A1/es not_active Expired
- 1985-11-07 CA CA000494812A patent/CA1250873A/en not_active Expired
- 1985-11-13 US US06/797,574 patent/US4641120A/en not_active Expired - Fee Related
- 1985-11-14 WO PCT/EP1985/000621 patent/WO1986003054A1/de active IP Right Grant
- 1985-11-14 HU HU854352A patent/HU195026B/hu not_active IP Right Cessation
- 1985-11-14 AT AT86900088T patent/ATE58259T1/de not_active IP Right Cessation
- 1985-11-14 DD DD85282864A patent/DD239298A5/de not_active IP Right Cessation
- 1985-11-14 PL PL1985256258A patent/PL151284B1/pl unknown
- 1985-11-14 AU AU52302/86A patent/AU592966B2/en not_active Ceased
- 1985-11-14 BR BR8507050A patent/BR8507050A/pt not_active IP Right Cessation
- 1985-11-14 EP EP86900088A patent/EP0202317B1/de not_active Expired - Lifetime
- 1985-11-14 DE DE8686900088T patent/DE3580478D1/de not_active Expired - Lifetime
- 1985-11-14 JP JP61500197A patent/JPS62500827A/ja active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO8603054A1 * |
Also Published As
Publication number | Publication date |
---|---|
BR8507050A (pt) | 1987-03-10 |
CA1250873A (en) | 1989-03-07 |
DE3580478D1 (de) | 1990-12-13 |
ATE58259T1 (de) | 1990-11-15 |
DE3513833C2 (de) | 1989-04-13 |
AU5230286A (en) | 1986-06-03 |
DD239298A5 (de) | 1986-09-17 |
US4641120A (en) | 1987-02-03 |
PL256258A1 (en) | 1986-10-07 |
ES8702738A1 (es) | 1986-12-16 |
WO1986003054A1 (en) | 1986-05-22 |
AU592966B2 (en) | 1990-02-01 |
JPS62500827A (ja) | 1987-04-02 |
HUT41155A (en) | 1987-03-30 |
HU195026B (en) | 1988-03-28 |
DE3513833A1 (de) | 1986-05-22 |
PL151284B1 (en) | 1990-08-31 |
EP0202317B1 (de) | 1990-11-07 |
ES544917A0 (es) | 1986-12-16 |
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