EP0114259B1 - Aimant permanent commutable - Google Patents

Aimant permanent commutable Download PDF

Info

Publication number
EP0114259B1
EP0114259B1 EP83112000A EP83112000A EP0114259B1 EP 0114259 B1 EP0114259 B1 EP 0114259B1 EP 83112000 A EP83112000 A EP 83112000A EP 83112000 A EP83112000 A EP 83112000A EP 0114259 B1 EP0114259 B1 EP 0114259B1
Authority
EP
European Patent Office
Prior art keywords
pole
permanent magnet
magnet
rail
pole pieces
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
EP83112000A
Other languages
German (de)
French (fr)
Other versions
EP0114259A1 (en
Inventor
Georg Mächler
Robert Leutwyler
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.)
Rheinmetall Air Defence AG
Original Assignee
Werkzeugmaschinenfabrik Oerlikon Buhrle AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Werkzeugmaschinenfabrik Oerlikon Buhrle AG filed Critical Werkzeugmaschinenfabrik Oerlikon Buhrle AG
Priority to AT83112000T priority Critical patent/ATE17934T1/en
Publication of EP0114259A1 publication Critical patent/EP0114259A1/en
Application granted granted Critical
Publication of EP0114259B1 publication Critical patent/EP0114259B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
    • B61H7/00—Brakes with braking members co-operating with the track
    • B61H7/02—Scotch blocks, skids, or like track-engaging shoes
    • B61H7/04—Scotch blocks, skids, or like track-engaging shoes attached to railway vehicles
    • B61H7/06—Skids
    • B61H7/08—Skids electromagnetically operated

Definitions

  • the invention relates to a switchable permanent magnet for a rail vehicle brake, comprising a stator with two opposing pole pieces, a fixed permanent magnet arranged between the two pole pieces and with a pole face adjacent to at least one of the two pole pieces, and a rotary magnet formed from a rotatable permanent magnet with segment-shaped pole shoes attached to the pole faces.
  • switchable permanent magnets as eddy current or as friction brakes in rail vehicles.
  • the patent GB-A-721 748 in particular FIGS. 1-4, shows a rotatable permanent magnet, the axis of rotation of which is arranged parallel to the rail, but which does not have a fixed permanent magnet.
  • rotating the permanent magnet here only by 90 ° for the purpose of switching off, the lines of force emerging from the pole are short-circuited via the pole pieces.
  • Means for rotating the permanent magnet and for lowering the braking device onto the rail are explained therein. The required braking force in such use was not achieved with the brake shown.
  • DE-A-2 931 539 shows a switchable permanent magnetic brake for rail vehicles, which has pole pieces of changing polarity in the longitudinal direction of the rail, against which fixed and rotatable permanent magnets are applied.
  • the brake is switched off by turning the permanent magnets, whose axes of rotation are perpendicular to the rail running surface, by 90 °.
  • the effort to control the turning systems is relatively large.
  • the invention solves the problem of eliminating the residual magnetic force in the switch-off position as much as possible, both when the rotatable permanent magnet is turned on and off by 180 ° and by 90 °.
  • the advantages achieved by the invention are essentially to be seen in the fact that, when switched off, as far as possible all the lines of force present in the pole piece ends are diverted in the direction of the pole piece of the rotatable permanent magnet.
  • the width at the pole piece ends is preferably smaller than the diameter of the segment-shaped recess in the pole pieces.
  • the switchable permanent magnet brake resting on a rail 1 in FIG. 1 contains, as stator, two opposing pole pieces 2, one in the upper part between these two fixed permanent magnets 3 and an underlying rotatable permanent magnet 4.
  • the fixed permanent magnet 3 with its two pole faces 31 firmly connected to the two pole pieces 2 and determines the polarity in the two pole pieces.
  • On the two pole faces 41 of the rotatable permanent magnet. 4 are segment-shaped pole shoes 5 attached and together represent a rotary magnet 6, which is rotatably mounted in a conventional manner and not shown here.
  • In the two pole pieces 2 there are segment-shaped recesses 7 for receiving the rotary magnet 6 and taking into account an air gap.
  • each pole piece 2 At the bottom of each pole piece 2, a likewise magnetizable wear body 8 is fastened, and a filler or abrasion body 9 made of non-magnetizable material is arranged between them. With their end faces 10, the wear bodies 8 form the effective magnetic surfaces through which the magnetic flux emerges and re-enters.
  • the two pole piece ends 20, d. H. In the area below the height of the rotary axis up to the end face 10 of the wear body 8, a recess 21 is made.
  • Fig. 1 shows the permanent magnet brake in the switched-on state.
  • d. H. on the right-hand side are the two pole pieces 2 and pole shoe 5, which are premagnetized as the south pole.
  • the rotatable permanent magnet 4 supports the magnetic flux of the fixed permanent magnet 3, i. H. the maximum induction takes effect on the end faces 10.
  • Fig. 1 also apply to the corresponding parts in Fig. 2, in which the Permanent magnet brake is shown in the switched-off state.
  • the rotary magnet 6 is rotated by 90 ° compared to the illustration in FIG. 1.
  • the magnetic flux of the rotatable permanent magnets 4 is short-circuited via the pole shoes 5 and the two pole pieces 2, in the extended area to the side of the rotating magnet 6.
  • the magnetic flux of the fixed permanent magnet 3 is short-circuited via the upper half of the two pole pieces 2 and via the upper pole piece 5.
  • the cutout 21 at the two pole piece ends 20 prevents a residual magnetic force from being present on the end faces 10, which would make it more difficult to release the permanent magnet brake from the rail, in that the downward force lines in the pole piece end 20 through the cutout 21 against the lower pole piece 5 are deflected so that they do not reach the effective magnetic exit surface.
  • the width B at the pole piece ends 20 is chosen to be smaller than the diameter of the segment-shaped recesses 7. It is also advantageous if the extended lateral region of the pole pieces 2 at the axis height of the rotary magnet 6 in the switched-off position is completely saturated by the rotatable permanent magnet 4, but the height of the pole piece 5 is chosen so that saturation by the fixed permanent magnet 3 is not achieved.

Abstract

1. Switchable permanent magnet for a rail-vehicle brake, containing a stator with two pole pieces (2) located opposite one another, a fixed permanent magnet (3) arranged between the two pole pieces (2) and with one pole face (31) resting against at least one of the two pole pieces (2), and a rotary magnet (6) formed from a rotatable permanent magnet (4) with two segment-shaped pole shoes (5) fastened to the pole faces (41), characterized in that the rotary magnet (6) is arranged rotatably underneath the fixed permanent magnet (3) in segment-shaped recesses (7) in the two pole pieces (2), in that each lower pole-piece end (20) projects beyond the rotary part and with its end face (10) forms the effective magnet surface, and in that a recess (21) is made on the outside of the pole-piece end (20).

Description

Die Erfindung bezieht sich auf einen schaltbaren Permanentmagneten für eine Schienenfahrzeugbremse, enthaltend einen Stator mit zwei gegenüberstehenden Polstücken, einen feststehenden Permanentmagneten, angeordnet zwischen den beiden Polstücken und mit einer Polfläche anliegend an mindestens einem der beiden Polstücke, und einen Drehmagneten, gebildet aus einem verdrehbaren Permanentmagneten mit segmentförmigen, an den Polflächen befestigten Polschuhen.The invention relates to a switchable permanent magnet for a rail vehicle brake, comprising a stator with two opposing pole pieces, a fixed permanent magnet arranged between the two pole pieces and with a pole face adjacent to at least one of the two pole pieces, and a rotary magnet formed from a rotatable permanent magnet with segment-shaped pole shoes attached to the pole faces.

Bei einem bekannten stufenlos regulierbaren Permanenthebemagneten, siehe Patent AU-B-444 415, erfolgt die Ein- und Ausschaltung bzw. Regelung des magnetischen Flusses durch Verdrehung des drehbaren Permanentmagneten um 180°. Im ausgeschalteten Zustand sind die Felder der beiden Permanentmagnete in sich kurzgeschlossen, so dass an der wirksamen Magnetfläche praktisch keine Haltekraft vorherrscht. Es hat sich aber in der Praxis gezeigt, dass bei Verwendung von starken Magneten in Ausschaltstellung trotzdem eine Restkraft vorhanden ist, weiche das Lösen zwischen Magnet und Werkstück verhindert oder erschwert.In the case of a known continuously adjustable permanent lifting magnet, see patent AU-B-444 415, the magnetic flux is switched on and off or regulated by rotating the rotatable permanent magnet by 180 °. When switched off, the fields of the two permanent magnets are short-circuited, so that there is practically no holding force on the effective magnetic surface. However, it has been shown in practice that when using strong magnets in the switch-off position there is still a residual force which prevents or makes it difficult to loosen between the magnet and the workpiece.

Ferner ist bekannt, schaltbare Permanentmagnete als Wirbelstrom- oder als Reibungsbremsen bei Schienenfahrzeugen zu verwenden. Das Patent GB-A-721 748, insbesondere die Fig. 1-4, zeigt einen verdrehbaren Permanentmagneten, dessen Drehachse parallel zur Schiene angeordnet ist, der jedoch keinen feststehenden Permanentmagneten aufweist. Durch Verdrehung des Permanentmagneten hier nur um 90° zum Zwecke der Ausschaltung werden die aus dem Pol austretenden Kraftlinien über die Polstücke kurzgeschlossen. Mittel zum Verdrehen des Permanentmagneten und zum Absenken der Bremseinrichtung auf die Schiene sind darin erläutert. Die erforderliche Bremskraft bei einer solchen Verwendung wurde jedoch mit der dargestellten Bremse nicht erreicht. In der DE-A-2 931 539 ist eine schaltbare dauermagnetische Bremse für Schienenfahrzeuge dargestellt, welche in Längsrichtung der Schiene Polstücke wechselnder Polarität, an denen feststehende und verdrehbare Dauermagnete anliegen, aufweist. Die Ausschaltung der Bremse erfolgt durch Verdrehen der Dauermagnete, deren Drehachsen senkrecht zur Schienenlauffläche stehen, um 90°. Der Aufwand zum Steuern der Drehsysteme ist relativ gross.It is also known to use switchable permanent magnets as eddy current or as friction brakes in rail vehicles. The patent GB-A-721 748, in particular FIGS. 1-4, shows a rotatable permanent magnet, the axis of rotation of which is arranged parallel to the rail, but which does not have a fixed permanent magnet. By rotating the permanent magnet here only by 90 ° for the purpose of switching off, the lines of force emerging from the pole are short-circuited via the pole pieces. Means for rotating the permanent magnet and for lowering the braking device onto the rail are explained therein. The required braking force in such use was not achieved with the brake shown. DE-A-2 931 539 shows a switchable permanent magnetic brake for rail vehicles, which has pole pieces of changing polarity in the longitudinal direction of the rail, against which fixed and rotatable permanent magnets are applied. The brake is switched off by turning the permanent magnets, whose axes of rotation are perpendicular to the rail running surface, by 90 °. The effort to control the turning systems is relatively large.

Die Erfindung, wie sie in den Ansprüchen gekennzeichnet ist, löst die Aufgabe, die magnetische Restkraft in der Ausschaltstellung möglichst zu eliminieren, sowohl bei einer Ein- und Ausschaltdrehung des verdrehbaren Dauermagneten um 180° wie auch um 90°.The invention, as characterized in the claims, solves the problem of eliminating the residual magnetic force in the switch-off position as much as possible, both when the rotatable permanent magnet is turned on and off by 180 ° and by 90 °.

Die durch die Erfindung erreichten Vorteile sind im wesentlichen darin zu sehen, dass im ausgeschalteten Zustand möglichst alle in den Polstückenden vorhandenen Kraftlinien in Richtung Polschuh des drehbaren Permanentmagneten umgeleitet werden. Vorzugsweise ist dabei die Breite an den Polstückenden kleiner als der Durchmesser der segmentförmigen Aussparung in den Polstücken. Besonders vorteilhaft wirkt sich diese Konstruktion bei einer Schienenfahrzeugbremse aus, wenn der drehbare Permanentmagnet mit seiner Achse parallel zur Schiene angeordnet ist und eine Schaltdrehung um 90° erfolgt.The advantages achieved by the invention are essentially to be seen in the fact that, when switched off, as far as possible all the lines of force present in the pole piece ends are diverted in the direction of the pole piece of the rotatable permanent magnet. The width at the pole piece ends is preferably smaller than the diameter of the segment-shaped recess in the pole pieces. This construction has a particularly advantageous effect on a rail vehicle brake if the rotatable permanent magnet is arranged with its axis parallel to the rail and the gear is rotated by 90 °.

Im folgenden wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnung erläutert. Es zeigen :

  • Figuren 1 und 2 je einen Querschnitt durch eine Permanentmagnetbremse für ein Schienenfahrzeug im ein- und ausgeschalteten Zustand.
In the following an embodiment of the invention is explained with reference to the drawing. Show it :
  • Figures 1 and 2 each have a cross section through a permanent magnet brake for a rail vehicle in the on and off state.

Die in Fig. 1 auf einer Schiene 1 aufliegende schaltbare Permanentmagnetbremse enthält als Stator zwei einander gegenüberliegende Polstücke 2, einen im oberen Teil zwischen diesen beiden angeordneten feststehenden Permanentmagneten 3 und einen darunter liegenden verdrehbaren Permanentmagneten 4. Der feststehende Permanentmagnet 3 ist mit seinen beiden Polflächen 31 mit den beiden Polstücken 2 fest verbunden und bestimmt die Polarität in den beiden Polstücken. An den beiden Polflächen 41 des verdrehbaren Permanentmagneten. 4 sind segmentförmige Polschuhe 5 befestigt und stellen zusammen einen Drehmagneten 6 dar, der in an sich bekannter Weise und hier nicht dargestellt drehbar gelagert ist. In den beiden Polstücken 2 sind segmentförmige Aussparungen 7 vorhanden zur Aufnahme des Drehmagneten 6 und unter Berücksichtigung eines Luftspaltes. Unten an jedem Polstück 2 ist ein ebenfalls magnetisierbaren Verschleisskörper 8 befestigt und zwischen diesen ist ein Füll- oder Abriebkörper 9 aus nichtmagnetisierbarem Material angeordnet. Mit ihren Stirnflächen 10 bilden die Verschleisskörper 8 die wirksamen Magnetflächen, durch welche der Magnetfluss aus- und wieder eintritt. An den beiden Polstückenden 20, d. h. im Bereich unterhalb der Drehachshöhe bis zur Stirnfläche 10 der Verschleisskörper 8, ist eine Aussparung 21 angebracht.The switchable permanent magnet brake resting on a rail 1 in FIG. 1 contains, as stator, two opposing pole pieces 2, one in the upper part between these two fixed permanent magnets 3 and an underlying rotatable permanent magnet 4. The fixed permanent magnet 3 with its two pole faces 31 firmly connected to the two pole pieces 2 and determines the polarity in the two pole pieces. On the two pole faces 41 of the rotatable permanent magnet. 4 are segment-shaped pole shoes 5 attached and together represent a rotary magnet 6, which is rotatably mounted in a conventional manner and not shown here. In the two pole pieces 2 there are segment-shaped recesses 7 for receiving the rotary magnet 6 and taking into account an air gap. At the bottom of each pole piece 2, a likewise magnetizable wear body 8 is fastened, and a filler or abrasion body 9 made of non-magnetizable material is arranged between them. With their end faces 10, the wear bodies 8 form the effective magnetic surfaces through which the magnetic flux emerges and re-enters. At the two pole piece ends 20, d. H. In the area below the height of the rotary axis up to the end face 10 of the wear body 8, a recess 21 is made.

Fig. 1 zeigt die Permanentmagnetbremse im eingeschalteten Zustand. Der segmentförmige Polschuh 5, der an den Nordpol des verdrehbaren Permanentmagneten 4 angrenzt, greift in die segmentförmige Aussparung 7 des mit einem Nordpol vormagnetisierten Polstückes 2 ein. Auf der andern Seite, d. h. auf der rechten Seite, befinden sich die beiden als Südpol vormagnetisierten Polstücke 2 und Polschuh 5. In dieser Stellung unterstützt der verdrehbare Permanentmagnet 4 den Magnetfluss des feststehenden Permanentmagnetes 3, d. h. die maximale Induktion wird an den Stirnflächen 10 wirksam.Fig. 1 shows the permanent magnet brake in the switched-on state. The segment-shaped pole piece 5, which adjoins the north pole of the rotatable permanent magnet 4, engages in the segment-shaped recess 7 of the pole piece 2 premagnetized with a north pole. On the other hand, d. H. on the right-hand side are the two pole pieces 2 and pole shoe 5, which are premagnetized as the south pole. In this position, the rotatable permanent magnet 4 supports the magnetic flux of the fixed permanent magnet 3, i. H. the maximum induction takes effect on the end faces 10.

Die Bezugsziffern von Fig. 1 gelten auch für die entsprechenden Teile in Fig. 2, in welcher die Permanentmagnetbremse im ausgeschalteten Zustand dargestellt ist. Der Drehmagnet 6 steht gegenüber der Darstellung von Fig. 1 um 90° verdreht. Der Magnetfluss der verdrehbaren Permanentmagneten 4 wird über die Polschuhe 5 und die beiden Polstücke 2, im erweiterten Bereich seitlich des Drehmagneten 6, kurzgeschlossen. Der Magnetfluss des feststehenden Permanentmagneten 3 wird über die obere Hälfte der beiden Polstücke 2 und über den oberen Polschuh 5 kurzgeschlossen. Durch die Aussparung 21 an den beiden Polstückenden 20 wird verhindert, dass eine magnetische Restkraft an den Stirnseiten 10 vorhanden ist, welche das Lösen der Permanentmagnetbremse von der Schiene erschweren würde, in dem die nach unten verlaufenden Kraftlinien im Polstückende 20 durch die Aussparung 21 gegen den unteren Polschuh 5 umgelenkt werden, so dass sie die wirksame magnetische Austrittsfläche nicht erreichen.The reference numerals of Fig. 1 also apply to the corresponding parts in Fig. 2, in which the Permanent magnet brake is shown in the switched-off state. The rotary magnet 6 is rotated by 90 ° compared to the illustration in FIG. 1. The magnetic flux of the rotatable permanent magnets 4 is short-circuited via the pole shoes 5 and the two pole pieces 2, in the extended area to the side of the rotating magnet 6. The magnetic flux of the fixed permanent magnet 3 is short-circuited via the upper half of the two pole pieces 2 and via the upper pole piece 5. The cutout 21 at the two pole piece ends 20 prevents a residual magnetic force from being present on the end faces 10, which would make it more difficult to release the permanent magnet brake from the rail, in that the downward force lines in the pole piece end 20 through the cutout 21 against the lower pole piece 5 are deflected so that they do not reach the effective magnetic exit surface.

Mit Vorteil wird die Breite B an den Polstückenden 20 kleiner gewählt als der Durchmesser der segmentförmigen Aussparungen 7. Vorteilhaft ist ferner, wenn der erweiterte seitliche Bereich der Polstücke 2 in Achshöhe des Drehmagneten 6 in Ausschaltstellung vom verdrehbaren Permanentmagneten 4 vollständig gesättigt wird, jedoch die Höhe des Polschuhs 5 so gewählt wird, dass eine Sättigung durch den feststehenden Permanentmagneten 3 nicht erzielt wird.Advantageously, the width B at the pole piece ends 20 is chosen to be smaller than the diameter of the segment-shaped recesses 7. It is also advantageous if the extended lateral region of the pole pieces 2 at the axis height of the rotary magnet 6 in the switched-off position is completely saturated by the rotatable permanent magnet 4, but the height of the pole piece 5 is chosen so that saturation by the fixed permanent magnet 3 is not achieved.

Versuche haben ergeben, dass es unerheblich ist, in welcher Richtung der Drehmagnet 6 von der Ein- zur Ausschaltstellung gedreht wird.Tests have shown that it is irrelevant in which direction the rotary magnet 6 is rotated from the on to the off position.

Auch bei Anwendungen, in denen die Ausschaltstellung durch Verdrehung des Drehmagneten 6 um 180° erreicht wird, ist aufgrund der Aussparung 21 am Polstückende 20 in der Ausschaltstellung praktisch keine Restkraft vorhanden. Die Dicke des Polstückes 2 in Achshöhe des Drehmagneten kann dadurch vergrössert werden, bzw. Magnete mit höheren Induktionswerten können verwendet werden.Even in applications in which the switch-off position is achieved by rotating the rotary magnet 6 by 180 °, there is practically no residual force in the switch-off position due to the cutout 21 at the pole piece end 20. The thickness of the pole piece 2 at the height of the axis of the rotating magnet can thereby be increased, or magnets with higher induction values can be used.

Claims (4)

1. Switchable permanent magnet for a rail-vehicle brake, containing a stator with two pole pieces (2) located opposite one another, a fixed permanent magnet (3) arranged between the two pole pieces (2) and with one pole face (31) resting against at least one of the two pole pieces (2), and a rotary magnet (6) formed from a rotatable permanent magnet (4) with two segment-shaped pole shoes (5) fastened to the pole faces (41), characterised in that the rotary magnet (6) is arranged rotatably underneath the fixed permanent magnet (3) in segment-shaped recesses (7) in the two pole pieces (2), in that each lower pole-piece end (20) projects beyond the rotary part and with its end face (10) forms the effective magnet surface, and in that a recess (21) is made on the outside of the pole-piece end (20).
2. Switchable permanent magnet according to Claim 1, characterised in that the width (8) at the two pole-piece ends (20) is less than the diameter of the segment-shaped recesses (7).
3. Switchable permanent magnet for a rail-vehicle brake according to claim 1, characterised in that the axis of rotation of the rotary magnet (6) is arranged parallel to the rail (1).
4. Switchable permanent magnet according to claim 3, characterised in that, in the cut-out position, the pole faces (41) of the rotatable permanent magnet (4) are parallel to the running surface of the rail (1).
EP83112000A 1982-12-23 1983-11-30 Aimant permanent commutable Expired EP0114259B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83112000T ATE17934T1 (en) 1982-12-23 1983-11-30 SWITCHABLE PERMANENT MAGNET.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH752582 1982-12-23
CH7525/82 1982-12-23

Publications (2)

Publication Number Publication Date
EP0114259A1 EP0114259A1 (en) 1984-08-01
EP0114259B1 true EP0114259B1 (en) 1986-02-12

Family

ID=4326513

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83112000A Expired EP0114259B1 (en) 1982-12-23 1983-11-30 Aimant permanent commutable

Country Status (4)

Country Link
EP (1) EP0114259B1 (en)
AT (1) ATE17934T1 (en)
DE (1) DE3362132D1 (en)
PL (1) PL143279B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2696205A1 (en) 2012-08-09 2014-02-12 Tecan Trading AG Microboard reader with cover lifter for microboards

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8802279A (en) * 1988-09-15 1990-04-02 Tebel Pneumatiek Bv MAGNETIC RAIL BRAKE DEVICE.
DE10111685A1 (en) * 2001-03-09 2002-09-12 Knorr Bremse Systeme Magnetic rail brake device
DE102011103097A1 (en) 2011-06-01 2012-12-06 Weber Maschinenbau Gmbh Breidenbach Apparatus and method for releasably securing a gripper
US9993824B2 (en) 2012-08-09 2018-06-12 Tecan Trading Ag Microplate reader with lid lifter for microplates
US9568414B2 (en) 2012-08-09 2017-02-14 Tecan Trading Ag Microplate reader with lid lifter for microplates
CN104494634A (en) * 2014-11-24 2015-04-08 上海庞丰交通设备科技有限公司 Dual magnetic type permanent magnet track braking device
EP3035084A1 (en) 2014-12-17 2016-06-22 Cable Detection Limited Active buried service detection sonde transmitter
CN106347407B (en) * 2016-09-25 2018-05-25 唐山市达泰科技有限公司 A kind of subregion double-magnetic permanent magnet track brake device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR873139A (en) * 1938-10-10 1942-06-30 Deutsche Edelstahlwerke Ag Permanent magnet chuck
GB721748A (en) * 1950-06-22 1955-01-12 Baermann Max Improvements in or relating to permanent magnet brakes or clutches
DE925414C (en) * 1951-02-15 1955-03-21 Max Baermann Brake or clutch activated by the effect of a magnetic field
DE964194C (en) * 1953-04-28 1957-05-16 Bosch Gmbh Robert Device for the serial processing of workpieces
DE962895C (en) * 1954-07-27 1957-05-02 Siemens Ag Device for braking by means of an electromagnetic brake, in particular rail brake for electric vehicles
NL7604572A (en) * 1976-04-29 1977-11-01 Walker Hagou Bv PERMANENT-MAGNETIC LIFTING MAGNET.
DE2931539A1 (en) * 1979-08-03 1981-02-19 Max Baermann Permanent magnet based switched brake - creates eighteen kilo-gauss field using rotating ferrite magnets

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2696205A1 (en) 2012-08-09 2014-02-12 Tecan Trading AG Microboard reader with cover lifter for microboards
EP3073269A1 (en) 2012-08-09 2016-09-28 Tecan Trading AG Microboard reader with cover lifter for microboards

Also Published As

Publication number Publication date
DE3362132D1 (en) 1986-03-27
ATE17934T1 (en) 1986-02-15
EP0114259A1 (en) 1984-08-01
PL143279B1 (en) 1988-01-30
PL245244A1 (en) 1984-08-27

Similar Documents

Publication Publication Date Title
CH645578A5 (en) SWITCHABLE, PERMANENT MAGNETIC BRAKE.
DE1810552B2 (en) Swivel joint with a horizontal swivel axis for swivel arms connected via spring compensation, in particular for medical devices
EP0114259B1 (en) Aimant permanent commutable
DE2931539C2 (en)
DE2557302C2 (en) Partially lined disc brakes for motor vehicles
DE2637068A1 (en) DISC BRAKE
DE2112359B2 (en) Electromagnetic rail brake
DE19822109A1 (en) Travel path limitation for trolleys, in particular for hoists
DE971096C (en) Device equipped with permanent magnets for holding or holding onto objects made of ferromagnetic materials or for braking
CH674684A5 (en) ELECTRICAL DEVICE SWITCH WITH A DEVICE FOR ADJUSTING AND / OR COMPENSATING THE FORWARD TRAVEL OF THE ACTUATOR.
DE1932118A1 (en) Braking device for rotating machine parts
EP0087027B1 (en) Permanent-magnet railway brake
DE1869457U (en) MAGNETIC CIRCUIT WITH SWIVELING ARMATURE FOR CONTACTORS OR SIMILAR DEVICES.
DE2149017A1 (en) DEVICE PROVIDED WITH AN ADJUSTABLE RESPONSE TORQUE FOR THE AUTOMATIC TORQUE DISCONNECTION OF GEARS
DE927569C (en) Notch device for cam travel switches, in particular multi-stage travel switches, for electric rail vehicles
DE843438C (en) Wall and ceiling pull switches
DE728809C (en) Magnetic electric machine (crank inductor) with a set of changeover springs
EP0057778A2 (en) Switchable permanent magnetic brake, having pole-pieces with changeable polarity, adjacent to fixed and rotatable permanent magnets
DE477957C (en) Electromagnet with a one-armed lever rotatably mounted at its end as an armature
DE19608396B4 (en) valve assembly
DE1086325B (en) Cam or cam disc construction for electrical switches
DE2658230A1 (en) STOP DEVICE FOR HANG CONVEYORS
DE2411137A1 (en) ELECTROMAGNET
CH490679A (en) Permanent magnetic braking device
Wehrhahn Phänomenologie und Kirchenordnung

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

17P Request for examination filed

Effective date: 19840813

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

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

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

ITF It: translation for a ep patent filed

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

AK Designated contracting states

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

REF Corresponds to:

Ref document number: 17934

Country of ref document: AT

Date of ref document: 19860215

Kind code of ref document: T

ET Fr: translation filed
REF Corresponds to:

Ref document number: 3362132

Country of ref document: DE

Date of ref document: 19860327

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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: 19901010

Year of fee payment: 8

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

Ref country code: FR

Payment date: 19901012

Year of fee payment: 8

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

Ref country code: GB

Payment date: 19901016

Year of fee payment: 8

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

Ref country code: CH

Payment date: 19901018

Year of fee payment: 8

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

Ref country code: SE

Payment date: 19901019

Year of fee payment: 8

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

Ref country code: BE

Payment date: 19901026

Year of fee payment: 8

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

Ref country code: DE

Payment date: 19901030

Year of fee payment: 8

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19901130

Year of fee payment: 8

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

Ref country code: LI

Effective date: 19911130

Ref country code: GB

Effective date: 19911130

Ref country code: CH

Effective date: 19911130

Ref country code: BE

Effective date: 19911130

Ref country code: AT

Effective date: 19911130

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

Ref country code: SE

Effective date: 19911201

BERE Be: lapsed

Owner name: WERKZEUGMASCHINENFABRIK OERLIKON-BUHRLE A.G.

Effective date: 19911130

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

Ref country code: NL

Effective date: 19920601

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: FR

Effective date: 19920731

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: 19920801

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 83112000.1

Effective date: 19920704