EP0122694A1 - Interrupteur de contrôle et de fin de course - Google Patents

Interrupteur de contrôle et de fin de course Download PDF

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Publication number
EP0122694A1
EP0122694A1 EP84301039A EP84301039A EP0122694A1 EP 0122694 A1 EP0122694 A1 EP 0122694A1 EP 84301039 A EP84301039 A EP 84301039A EP 84301039 A EP84301039 A EP 84301039A EP 0122694 A1 EP0122694 A1 EP 0122694A1
Authority
EP
European Patent Office
Prior art keywords
outer housing
switch
permanent magnet
control switch
actuator
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.)
Withdrawn
Application number
EP84301039A
Other languages
German (de)
English (en)
Inventor
Pal Dr. Dipl. El. Eng. Tokodi
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.)
KONTAKTA ALKATRESZGYAR
Original Assignee
KONTAKTA ALKATRESZGYAR
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 KONTAKTA ALKATRESZGYAR filed Critical KONTAKTA ALKATRESZGYAR
Publication of EP0122694A1 publication Critical patent/EP0122694A1/fr
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to a control switch and limiter, comprising according to the art an outer housing made of insulating material, a switch chamber in the outer housing including switching means, an actuator connected to and actuating the switching means and a movable contact altering its position between fixed contacts belonging to the switching means for realizing the switch operation.
  • the control switch and limiter according to the present invention can be used in explosive or dangerous environment and has long life duration.
  • control switch and limiter units capable of switching currents with power up to 1,5 kW.
  • the construction of these units called further switches must correspond to requirements accepted everywhere over the world and they should be arranged in a clad; thereby they are capable of carrying out switch operations in defined space positions in order to control currents, movements.
  • the switches of the mentioned construction generally work in outdoor units, in explosive or/and wet, dampy environment.
  • the exposure to danger is the basis of the fact that the main technical features of the switches are determined not only by the electric power to be switched over, but by their conformity to the requirements set under aspects of the protection of life and property.
  • the last are in close connection with the proof and the protection level of the device.
  • the first means the explosion proof, the protection of the switch against the gases penetrating the inner parts of the construction and the second the contact protection, the protection against penetration of the switch by solids and liquids.
  • the actuating means of the switches should be arranged in a clad and therein the elements of the switching mechanism should be connected in a way which corresponds to the related requirements under this aspect. In this feature all of the known constructions are disadvantageous.
  • the sealing compounds should be chosen according to the expected kind of the damage caused to them by the environment; when projecting a switch according to the art, the sealing compounds should correspond to the requirements set by the high temperature, dusty, wet, aggressive or intensively sunny environment.
  • the construction of the sealing has to be selected in order to assure a not rigid way-force characteristics that doesn't show any change during work.
  • the disadvantageous features of the known switches cause that they can not work so long as expected, thus, instead of more million operations they can carry out only up to about three-four- hundred-thousand.
  • the invention is aimed to avoid the mentioned disadvantages and to elaborate a solution whereby it becomes possible to create a switch that by novel features is capable of ensuring protection against penetration of solids or liquids and of working in explosive environment, and that is of longer life duration than the known switches according to the art.
  • the invention is therefore a control switch and limiter, especially for use in explosive environment, comprising an outer housing made of insulating material, a-switch chamber in the outer housing including switching means, an actuator connected to and actuating the switching means, and a movable contact altering its position between fixed contacts belonging to the switching means for carrying out switching operations, wherein the improvement is that the actuator comprises a magnetic element generating magnetic forces outside of the outer housing, inside of the outer housing an inner permanent magnet is coupled with the magnetic element and the inner permanent magnet is interconnected with an insulating body guided for actuating the movable contact.
  • the magnetic element and the inner permanent magnet are arranged advantageously on two sides of a separation wall closing the outer housing.
  • the magnetic element can be e.g. an outer permanent magnet which is guided by means of a pretensioned ring in a shell formed on the outer housing, wherein the outer and the inner permanent magnets are arranged with like poles against one another.
  • the inner permanent magnet and the insulating body advantageously create a unit, wherein the insulating body made e.g. of synthetic resin incorporates the magnet.
  • the switch according to the invention can be hermetically closed and it is advantageous to apply a rubber plug in the insulating material of the outer housing, whereby the switch chamber can be exhausted and filled with neutral gas.
  • control switch and limiter according to the invention can be sealed hermetically and filled with neutral gas or liquid or exhausted to vacuum, and thereby it is possible to use it in explosive or agressive environment with long live duration. It is especially important that the actuator has no mechanical contact to the actuated contacts.
  • a high-sensitive control switch and limiter is shown in F ig. 1.
  • the elements of the construction are arranged in or around an outer housing 1 made of insulating material, surrounding a switch chamber 19.
  • the switch chamber 19 comprises an upper and a lower fixed contact 2, 2a, further a movable contact 3 built up on a contact plate 9.
  • the movable contact 3 rests always at one of the fixed contacts 2, 2a and ensures thereby closing one of two circuits.
  • An actuator 16 is connected to the outer housing 1 and comprises a magnetic element coupled with an inner permanent magnet 8 arranged inside the switch chamber 19.
  • the inner permanent magnet 8 is interconnected with an insulating body 7 and form therewith an element for actuating the movable contact 3 supported if desired by means of a pressure spring 11 connected to a spring support 10. They are guided inside the outer housing 1. Between the actuator 16 and the inner permanent magnet 8 with insulating body 7 there is advantageously a separation wall 6 closing hermetically the outer housing 1.
  • the insulating body may be advantageously supported by the contact plate 9 in its upper position - in this case there - is no play before realizing the switching operation by the movable contact 3.
  • a rubber plug 5 applying a syringe therethrough it is possible to exhaust the switch chamber 19 and either to fill it with desired neutral gas or liquid either to leave it under vacuum. After removing the syringe the little hole can be sealed also if desired by applying resin.
  • the actuator 16 comprising a magnetic element as mentioned above can be constructed in different ways.
  • the proposed solutions include a permanent magnet 8 or an electromagnet 20 / F ig. 1 and 2/. If using a permanent magnet 8 it should be arranged with like pole oppositely to the inner permanent magnet 12 in order to force its movement when nearing to it.
  • the permanent magnet 12 can be guided by means of a pretensioned spring 13 arranged along an axle 17 inside a body 13a guided in the shell 4. Inside of the shell 4 a stop pin 14 and a stop ring 15 limit the movement of the actuator 16 and of the pretensioned spring 13.
  • the permanent magnet 8 can.cooperate also with further permanent magnets forcing its movement when the actuator 16 is applied.
  • another advantageous solution is to apply an electromagnet 20 placed in the shell 4 and/or fixed to the outer housing 1.
  • the electromagnet should be connected of course to an outer electric supply.
  • the actuator 16 can include in this case the permanent magnet 12 in order to avoid possibility of electric sparks when using an electromagnet.
  • the outer housing 1 is arranged in a switch clad 21 comprising insulating synthetic resin 23 surrounding the outer housing 1. In the insulating synthetic resin there are arranged the wires of a cable 22.
  • the switch clad 21 is connected to a transmission body 24 by axle 2 5 cooperating with a pression roll 26 supported by the actuator 16 and fixed by a tension spring 29.
  • the axle 25 is connected also to an arm 27 equipped with a stop roll 28. Over the arm 27 to limit the way of movement thereof there is a stop dog 30.
  • the insulating synthetic resin By using.-the insulating synthetic resin it is possible to realize a control switch and limiter which can be closed with the highest reliability.
  • the elements where electric sparking can take place are hermetically closed in a space wherein either vacuum, either liquid or neutral gas can be applied. It is clear also that the number of switching operations had no influence on the increase of the possibility of sparking because the change of the dimensions of the shell 4 and of the actuator 16 has nothing to do with the damage of sparking at all.
  • control switch and limiter operates as follows:
  • the actuator 16 makes the inner permanent magnet 8 and the insulating body 7 move in direction of the movable contact under influence of magnetic forces.
  • the actuator 16 equipped with the electromagnet 20 generates the magnetic forces when connected to a supply.
  • the actuator 16 of mechanical mode of operation should be pressed in direction of axle 17. In this moment the pretensioned spring 13, the body 13 and the stop ring 15 are forced to move and they push the permanent magnet 12 in direction of the separation wall 6.
  • the like poles of the electromagnet 20 or permanent magnet 12 and the inner permanent magnet 8 are arranged oppositely to one another and therefore a pushing force is generated.
  • the insulating body. 7 makes the contact plate 9 move under influence of this force.
  • the pressure spring 11 connected to the spring support 10 ensures the reliable jump of the movable contact 3 from the upper fixed contact 2 to the lower one 2a. After releasing the actuator 16 the contact plate 9 returns under influence of the resilient forces to the upper fixed contact 2. The operation of the movable contact 3 appears at the beginning of the movement of the actuator 16 or in the moment when a current begins to flow in the electromagnet 20.
  • the proposed switch and limiter includes no construction element or clearance whereby a spark can be transmitted from the switch chamber 19 to the environment. Because the switch chamber 19 can be hermetically closed the life duration of the switching elements can be prolongated to at least some million switching operations by applying selected gaseous or liquid filling. It is also important that the hermetically closed switch chamber 19 allows to switch higher electric powers than the known solutions according to the art.
  • control switch and limiter devices equivalent to those given above will be within the scope of the claimed invention and such devices will have magnetic elements and mechanic system dependent on the field of application and the given operational circumstances.

Landscapes

  • Push-Button Switches (AREA)
EP84301039A 1983-04-19 1984-02-17 Interrupteur de contrôle et de fin de course Withdrawn EP0122694A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HU135083 1983-04-19
HU135083 1983-04-19

Publications (1)

Publication Number Publication Date
EP0122694A1 true EP0122694A1 (fr) 1984-10-24

Family

ID=10954063

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84301039A Withdrawn EP0122694A1 (fr) 1983-04-19 1984-02-17 Interrupteur de contrôle et de fin de course

Country Status (2)

Country Link
EP (1) EP0122694A1 (fr)
JP (1) JPS6035424A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2206240A (en) * 1987-06-26 1988-12-29 Birns Uk Limited Magnetically operated electrical switches

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0694586B2 (ja) * 1986-07-21 1994-11-24 三菱アルミニウム株式会社 オ−ルアルミニウム缶製造用Ａｌ合金薄板の製造法
US5746230A (en) * 1990-08-24 1998-05-05 Philip Morris Incorporated Concentric smoking filter having discrete tow and web filter media
US5365951A (en) * 1990-08-24 1994-11-22 Philip Morris Incorporated Concentric smoking filter having cellulose acetate tow periphery and carbon-particle-loaded web filter core
KR100230173B1 (ko) * 1997-03-26 1999-11-15 노건일 Ti5Si3계 금속간화합물의 제조방법

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1114385A (fr) * 1954-09-18 1956-04-11 Labinal Ets Commutateur étanche
US3529269A (en) * 1966-08-01 1970-09-15 William P Gardiner Magnetic switch
FR2045254A5 (fr) * 1969-06-27 1971-02-26 David Michel
FR2438907A1 (fr) * 1978-10-09 1980-05-09 Franqueville Philippe Interrupteur a lames souples a commande magnetique axiale
FR2451093A1 (fr) * 1979-03-09 1980-10-03 Dalmau Raymond Interrupteur electrique etanche actionne magnetiquement
FR2492580A1 (fr) * 1980-10-20 1982-04-23 Danerol Jacques Poussoir magnetique de commande
FR2513807A1 (fr) * 1981-09-28 1983-04-01 Menard Gilles Contact electrique a poussoir

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1114385A (fr) * 1954-09-18 1956-04-11 Labinal Ets Commutateur étanche
US3529269A (en) * 1966-08-01 1970-09-15 William P Gardiner Magnetic switch
FR2045254A5 (fr) * 1969-06-27 1971-02-26 David Michel
FR2438907A1 (fr) * 1978-10-09 1980-05-09 Franqueville Philippe Interrupteur a lames souples a commande magnetique axiale
FR2451093A1 (fr) * 1979-03-09 1980-10-03 Dalmau Raymond Interrupteur electrique etanche actionne magnetiquement
FR2492580A1 (fr) * 1980-10-20 1982-04-23 Danerol Jacques Poussoir magnetique de commande
FR2513807A1 (fr) * 1981-09-28 1983-04-01 Menard Gilles Contact electrique a poussoir

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2206240A (en) * 1987-06-26 1988-12-29 Birns Uk Limited Magnetically operated electrical switches

Also Published As

Publication number Publication date
JPS6035424A (ja) 1985-02-23

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

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AK Designated contracting states

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

17P Request for examination filed

Effective date: 19841214

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

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18D Application deemed to be withdrawn

Effective date: 19860305

RIN1 Information on inventor provided before grant (corrected)

Inventor name: TOKODI, PAL, DR. DIPL. EL. ENG.