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EP0050063B1 - Release mechanism with permanent magnet - Google Patents

Release mechanism with permanent magnet Download PDF

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Publication number
EP0050063B1
EP0050063B1 EP81401479A EP81401479A EP0050063B1 EP 0050063 B1 EP0050063 B1 EP 0050063B1 EP 81401479 A EP81401479 A EP 81401479A EP 81401479 A EP81401479 A EP 81401479A EP 0050063 B1 EP0050063 B1 EP 0050063B1
Authority
EP
European Patent Office
Prior art keywords
magnet
location
housing
lever
substantially perpendicular
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
EP81401479A
Other languages
German (de)
French (fr)
Other versions
EP0050063A1 (en
Inventor
Christian Mabillot
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.)
POMPES GUINARD DITE Ste
Original Assignee
Pompes Guinard SA
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 Pompes Guinard SA filed Critical Pompes Guinard SA
Publication of EP0050063A1 publication Critical patent/EP0050063A1/en
Application granted granted Critical
Publication of EP0050063B1 publication Critical patent/EP0050063B1/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
    • H01H36/02—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding actuated by movement of a float carrying a magnet

Definitions

  • the present invention relates to trigger devices of the type according to the preamble of the main claim. Illustrated on the example of the triggering of a cellar pump, it nevertheless applies to any machine or installation requiring a trigger.
  • the invention solves at the same time the problems of sealing, timing and adjustment by the provisions of the characteristic part of the main claim.
  • the device shown comprises a first permanent magnet 1, housed in a housing 2 made of non-magnetic plastic.
  • This magnet 1 is carried by one end of a lever 3 held in the position of FIGS. 1 and 4 by a spring 4. In this position, the other end of the lever 3 does not close an electrical circuit 5 with a microswitch .
  • a plastic housing 6 is attached to the housing 2 and does not communicate with the latter.
  • the housing 2 and the housing 6 have a common wall 7 substantially perpendicular to the path followed by the magnet 1, when it is attracted against the force of the spring 4, with tilting of the lever 3.
  • a second permanent magnet 9 In the housing 6 is mounted for rotation about an axis 8 a second permanent magnet 9.
  • the axis 8 crosses without sealing the wall 10 of the housing opposite the wall 7.
  • the axis 8 is bent and carries at the end a float 11.
  • the magnet 9 can thus describe, according to a back-and-forth movement comes, a semicircle, whose plane is substantially perpendicular to the trajectory of attraction of the magnet 1.
  • the magnet 9 is oriented so that its polarity, when it comes in front of the place 12 (figure 2) where it is opposite the magnet 1, is opposite to that of the latter.
  • a plate 13 made of magnetic stainless steel is fixed in rotation with the magnet 9. Thinner than the latter, it applies, when it is in front of the place 12, to the magnet 1 a much less magnetic force than that that the magnet 9 applies to the magnet 1 when it is in front of the location 12. This force applied by the plate 13 is insufficient to attract the magnet 1 but is sufficient to hold it in said location 12 if there is been attracted beforehand.
  • the assembly is such that, when the second magnet 9 and the plate 13 return from place 12, the plate 13 remains in front of place 12 after the magnet 9 has already left it.
  • the device operates as follows.
  • the float 11 is at the lowest level ( Figure 1).
  • the magnet 1 and the magnet 9 are offset by a large angle.
  • the magnet 9 does not attract the magnet 1. It is the force of the spring 4 which determines the position of the magnet 1 and of the lever 3.
  • the electric circuit 5 for triggering a pump P is open.
  • the water level rises.
  • the float 11 rises and rotates the axis 8.
  • the plate 13 passes in front of the location 12.
  • the magnet 1 is not attracted.
  • the magnet 9 turns until it comes to the place 12 (figure 2). It attracts the magnet 1.
  • the electric circuit 5 closes and controls the starting of the pump P by means of an electric conductor C.
  • the crossing of the housing 2 does not raise any sealing difficulty.
  • the pump always works thanks to this maintenance.
  • the plate 13 continues to move until the magnetic holding attraction becomes less than the force of the spring 4. There is then a sudden cut.
  • This very simple device also has the advantage of allowing rudimentary positioning of the microswitch relative to the position of the control pin 8.
  • a relatively large variation in the microswitch position results in a very small deviation of the high and low levels.
  • the invention can also be applied to a switch with two fixed positions.
  • the retaining plate is replaced by a third magnet, offset from the second by an angle which will depend on the desired gap between trigger and stop level.
  • the holding plate 13 may also not be in contact with the magnet 9 or even be located inside the housing 2.
  • the microswitch can be single or double or multi-pole.
  • the magnets can be controlled by something other than a float.

Landscapes

  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Electromagnets (AREA)
  • Cookers (AREA)

Description

La présente invention se rapporte aux dispositifs de déclenchement du type suivant le préambule de la revendication principale. Illustrée sur l'exemple du déclenchement d'une pompe vide cave, elle s'applique néanmoins à toute machine ou installation nécessitant un déclenchement.The present invention relates to trigger devices of the type according to the preamble of the main claim. Illustrated on the example of the triggering of a cellar pump, it nevertheless applies to any machine or installation requiring a trigger.

Dans le brevet US-A-3 270 165, il est décrit un tel dispositif, qui est étanche, mais qui est soumis à des battements.In US-A-3,270,165, there is described such a device, which is waterproof, but which is subjected to beating.

Dans le brevet FR-A-1 440 658, il est décrit un contacteur électrique à niveau. Un anneau en matériau magnétique exerce sur un aimant une action magnétique tendant à le maintenir verrouillé en chacune de ses positions extrêmes. Ce dispositif est également soumis à des battements.In patent FR-A-1,440,658, a level electrical contactor is described. A ring of magnetic material exerts on a magnet a magnetic action tending to keep it locked in each of its extreme positions. This device is also subjected to beating.

L'invention résout tout à la fois les problèmes d'étanchéité, de temporisation et de réglage par les dispositions de la partie caractéristique de la revendication principale.The invention solves at the same time the problems of sealing, timing and adjustment by the provisions of the characteristic part of the main claim.

Quand le deuxième aimant revient de passer devant l'endroit et cesse d'attirer le premier, le troisième maintient le premier à l'endroit, ce qui évite les battements. Mais lorsque le troisième aimant vient, en y passant avant le deuxième, devant l'endroit, où le premier aimant ne se trouve pas encore, il ne l'y attire pas. Par ce fonctionnement dissymétrique, on obtient la temporisation recherchée d'une manière élégante. Et, de plus, ce montage permet de se contenter d'un réglage rudimentaire des pièces de déclenchement en aval du premier aimant.When the second magnet returns to pass in front of the place and ceases to attract the first, the third keeps the first in place, which avoids the beating. But when the third magnet comes, passing before the second, in front of the place where the first magnet is not yet, it does not attract it. By this asymmetrical operation, the desired time delay is obtained in an elegant manner. And, in addition, this arrangement makes it possible to be satisfied with a rudimentary adjustment of the triggering parts downstream of the first magnet.

D'autres caractéristiques de l'invention sont énoncées aux sous-revendications.Other features of the invention are set out in the dependent claims.

Aux dessins annexés donnés uniquement à titre d'exemple :

  • les figures 1 à 3 sont des vues en coupe d'un dispositif de déclenchement suivant l'invention en trois positions différentes ; et
  • les figures 4 à 6 sont des vues de côté correspondant aux figures 1 à 3.
In the appended drawings given solely by way of example:
  • Figures 1 to 3 are sectional views of a trigger device according to the invention in three different positions; and
  • Figures 4 to 6 are side views corresponding to Figures 1 to 3.

Le dispositif représenté comprend un premier aimant 1 permanent, logé dans un boîtier 2 en matière plastique non magnétique. Cet aimant 1 est porté par l'une des extrémités d'un levier 3 maintenu en la position des figures 1 et 4 par un ressort 4. En cette position, l'autre extrémité du levier 3 ne ferme pas un circuit 5 électrique à minirupteur.The device shown comprises a first permanent magnet 1, housed in a housing 2 made of non-magnetic plastic. This magnet 1 is carried by one end of a lever 3 held in the position of FIGS. 1 and 4 by a spring 4. In this position, the other end of the lever 3 does not close an electrical circuit 5 with a microswitch .

Un logement 6 en matière plastique est attenant au boîtier 2 et ne communique pas avec celui-ci. Le boîtier 2 et le logement 6 ont une paroi 7 commune sensiblement perpendiculaire à la trajectoire suivie par l'aimant 1, lorsqu'il est attiré à l'encontre de la force du ressort 4, avec basculement du levier 3.A plastic housing 6 is attached to the housing 2 and does not communicate with the latter. The housing 2 and the housing 6 have a common wall 7 substantially perpendicular to the path followed by the magnet 1, when it is attracted against the force of the spring 4, with tilting of the lever 3.

Dans le logement 6 est monté à rotation autour d'un axe 8 un deuxième aimant 9 permanent. L'axe 8 traverse sans étanchéité la paroi 10 du logement opposé à la paroi 7. L'axe 8 est coudé et porte à l'extrémité un flotteur 11. L'aimant 9 peut ainsi décrire, suivant un mouvement de va-et-vient, un demi-cercle, dont le plan est sensiblement perpendiculaire à la trajectoire d'attraction de l'aimant 1. L'aimant 9 est orienté de manière à ce que sa polarité, lorsqu'il vient devant l'endroit 12 (figure 2) où il est en regard de l'aimant 1, soit opposée à celle de celui-ci.In the housing 6 is mounted for rotation about an axis 8 a second permanent magnet 9. The axis 8 crosses without sealing the wall 10 of the housing opposite the wall 7. The axis 8 is bent and carries at the end a float 11. The magnet 9 can thus describe, according to a back-and-forth movement comes, a semicircle, whose plane is substantially perpendicular to the trajectory of attraction of the magnet 1. The magnet 9 is oriented so that its polarity, when it comes in front of the place 12 (figure 2) where it is opposite the magnet 1, is opposite to that of the latter.

Une plaquette 13 en acier inoxydable magnétique est solidaire en rotation de l'aimant 9. Plus mince que celui-ci, elle applique, lorsqu'elle se trouve devant l'endroit 12, à l'aimant 1 une force magnétique bien moindre que celle que l'aimant 9 applique à l'aimant 1 lorsqu'il se trouve devant l'endroit 12. Cette force appliquée par la plaquette 13 est insuffisante pour attirer l'aimant 1 mais suffit pour le maintenir audit endroit 12 s'il y a été attiré au préalable. Le montage est tel que, lorsque le deuxième aimant 9 et la plaquette 13 reviennent de l'endroit 12, la plaquette 13 reste devant l'endroit 12 après que l'aimant 9 l'a déjà quitté.A plate 13 made of magnetic stainless steel is fixed in rotation with the magnet 9. Thinner than the latter, it applies, when it is in front of the place 12, to the magnet 1 a much less magnetic force than that that the magnet 9 applies to the magnet 1 when it is in front of the location 12. This force applied by the plate 13 is insufficient to attract the magnet 1 but is sufficient to hold it in said location 12 if there is been attracted beforehand. The assembly is such that, when the second magnet 9 and the plate 13 return from place 12, the plate 13 remains in front of place 12 after the magnet 9 has already left it.

Le dispositif fonctionne de la manière suivante.The device operates as follows.

Le flotteur 11 est au niveau le plus bas (figure 1). L'aimant 1 et l'aimant 9 sont décalés d'un angle important. L'aimant 9 n'attire pas l'aimant 1. C'est la force du ressort 4 qui détermine la position de l'aimant 1 et du levier 3. Le circuit 5 électrique de déclenchement d'une pompe P est ouvert.The float 11 is at the lowest level (Figure 1). The magnet 1 and the magnet 9 are offset by a large angle. The magnet 9 does not attract the magnet 1. It is the force of the spring 4 which determines the position of the magnet 1 and of the lever 3. The electric circuit 5 for triggering a pump P is open.

Le niveau de l'eau s'élève. Le flotteur 11 s'élève et fait tourner l'axe 8. La plaquette 13 passe devant l'endroit 12. L'aimant 1 n'est pas attiré. Puis l'aimant 9 tourne jusqu'à venir devant l'endroit 12 (figure 2). Il y attire l'aimant 1. Le circuit 5 électrique se ferme et commande la mise en route de la pompe P par l'intermédiaire d'un conducteur C électrique. La traversée du boîtier 2 ne soulève aucune difficulté d'étanchéité.The water level rises. The float 11 rises and rotates the axis 8. The plate 13 passes in front of the location 12. The magnet 1 is not attracted. Then the magnet 9 turns until it comes to the place 12 (figure 2). It attracts the magnet 1. The electric circuit 5 closes and controls the starting of the pump P by means of an electric conductor C. The crossing of the housing 2 does not raise any sealing difficulty.

La pompe P fonctionne. Le niveau de l'eau baisse. Le flotteur 11 s'abaisse. Il fait tourner l'axe 8 en sens inverse. L'aimant 9 revient de l'endroit 12. Mais l'aimant 1 reste attiré par la plaquette 13 (figure 3).Pump P is running. The water level drops. The float 11 lowers. It rotates axis 8 in the opposite direction. The magnet 9 returns from place 12. But the magnet 1 remains attracted by the plate 13 (Figure 3).

La pompe fonctionne toujours grâce à ce maintien. La plaquette 13 continue son déplacement jusqu'au moment où l'attraction magnétique de maintien devient inférieure à la force du ressort 4. Il y a alors coupure brusque.The pump always works thanks to this maintenance. The plate 13 continues to move until the magnetic holding attraction becomes less than the force of the spring 4. There is then a sudden cut.

Pour augmenter ou diminuer la phase de maintien, il suffit d'augmenter ou de diminuer la longueur de la plaquette 13 de maintien ou le décalage angulaire des deux aimants.To increase or decrease the holding phase, it suffices to increase or decrease the length of the holding plate 13 or the angular offset of the two magnets.

Ce dispositif très simple a, en outre, l'avantage de permettre un positionnement rudimentaire du minirupteur par rapport à la position de l'axe 8 de commande.This very simple device also has the advantage of allowing rudimentary positioning of the microswitch relative to the position of the control pin 8.

Une variation relativement importante dans la position de minirupteur se traduit en effet par un écart très faible des niveaux haut et bas.A relatively large variation in the microswitch position results in a very small deviation of the high and low levels.

L'invention peut également s'appliquer à un interrupteur à deux positions fixes. Dans ce cas, la plaque de maintien est remplacée par un troisième aimant, décalé par rapport au second d'un angle qui sera fonction de l'écart recherché entre le niveau de déclenchement et d'arrêt.The invention can also be applied to a switch with two fixed positions. In this case, the retaining plate is replaced by a third magnet, offset from the second by an angle which will depend on the desired gap between trigger and stop level.

La plaquette 13 de maintien peut également ne pas être en contact avec l'aimant 9 ou même se situer à l'intérieur du boîtier 2.The holding plate 13 may also not be in contact with the magnet 9 or even be located inside the housing 2.

Le minirupteur de commande peut être simple ou double ou multipôle.The microswitch can be single or double or multi-pole.

Les aimants peuvent être commandés par autre chose qu'un flotteur.The magnets can be controlled by something other than a float.

Claims (7)

1. An actuating device formed by a first magnet (1) which is mounted in such a way that it can be attracted to a location (12) and returned therefrom, a second magnet (9) which applies a sufficient magnetic force that, when it comes into a position in front of the location (12) in which it is separated from the first magnet (1) by a nonmagnetic partition (2), it attracts the first magnet (1) to said location (12), and a third magnet (13), characterised in that the third magnet (13) is fixed with respect to the second magnet (9), is so disposed that the third magnet (13) still remains in front of the location (12) after the second magnet (9) when they return from passing in front of the location (12), and has an attraction force such that the third magnet (13) holds the first magnet (1) at said location (12) but does not attract it thereto (12).
2. A device according to claim 1, characterised in that the second magnet (9) is displaced with a reciprocating movement.
3. A device according to claim 1 or claim 2, characterised in that the paths followed by said first magnet (1) and by said second magnet (9) are substantially perpendicular.
4. A device according to claim 3, characterised in that the second magnet (9) describes a circular arc, the plane of which is substantially perpendicular to the path followed by the first magnet (1).
5. A device according to one of claims 1 to 4, characterised in that said first and second magnets (1 and 9) are housed in spaces which do not communicate with each other.
6. A device according to one of the preceding claims, characterised in that the first magnet (1) is mounted on a lever (3).
7. A device according to one of claims 1 to 6, wherein the first magnet (1) and the lever (3) are enclosed in a housing (2), characterised in that an electrical conductor (C) forming part of an electrical circuit (5) passes through the housing (2).
EP81401479A 1980-10-10 1981-09-23 Release mechanism with permanent magnet Expired EP0050063B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8021656A FR2492154A1 (en) 1980-10-10 1980-10-10 MAGNETIC ACTUATION DEVICE
FR8021656 1980-10-10

Publications (2)

Publication Number Publication Date
EP0050063A1 EP0050063A1 (en) 1982-04-21
EP0050063B1 true EP0050063B1 (en) 1984-07-25

Family

ID=9246732

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81401479A Expired EP0050063B1 (en) 1980-10-10 1981-09-23 Release mechanism with permanent magnet

Country Status (5)

Country Link
EP (1) EP0050063B1 (en)
DE (1) DE3165085D1 (en)
DK (1) DK150554C (en)
FR (1) FR2492154A1 (en)
IT (1) IT1145945B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19644203A1 (en) * 1996-10-24 1998-04-30 Klein Schanzlin & Becker Ag Device for level measurement in a container

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8812036U1 (en) * 1988-09-23 1989-01-26 Henkel, Wolfgang Eberhard, 6832 Hockenheim Bistable switching contact for external mounting on level pipes
FR2751381B1 (en) * 1996-07-22 1998-10-02 Ksb Sa COMMAND TO START UP A SUBMERSIBLE PUMP
DE19745184A1 (en) * 1997-10-13 1999-04-15 Klein Schanzlin & Becker Ag Float switch
GB2537397A (en) * 2015-04-16 2016-10-19 Well Electronics Co Ltd Breaker device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2378129A (en) * 1941-08-07 1945-06-12 Trist & Co Ltd Ronald Magnetic device
US2414688A (en) * 1942-08-22 1947-01-21 Trist & Co Ltd Ronald Magnetic device
US2690484A (en) * 1952-07-28 1954-09-28 Christian J Van Eyk Float switch
US3270165A (en) * 1963-02-21 1966-08-30 George A Gariepy Magnetically operated mercury switch with improved slidable and rotatable magnetic actuators
FR1440658A (en) * 1965-01-13 1966-06-03 Desgranges & Huot Improvements to level electrical contactors
DE2623395A1 (en) * 1976-05-25 1977-12-08 Okar Luehn Float switch for liquid level control - has shaft with diametrically opposite magnets and rotary motion producing polarity change

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19644203A1 (en) * 1996-10-24 1998-04-30 Klein Schanzlin & Becker Ag Device for level measurement in a container

Also Published As

Publication number Publication date
DK442381A (en) 1982-04-11
FR2492154B1 (en) 1983-06-10
EP0050063A1 (en) 1982-04-21
DK150554C (en) 1988-02-22
DK150554B (en) 1987-03-23
IT1145945B (en) 1986-11-12
IT8112637A0 (en) 1981-09-29
FR2492154A1 (en) 1982-04-16
DE3165085D1 (en) 1984-08-30

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