EP1034552B1 - Ameliorations apportees a des actionneurs a sensibilite thermique - Google Patents

Ameliorations apportees a des actionneurs a sensibilite thermique Download PDF

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Publication number
EP1034552B1
EP1034552B1 EP98956996A EP98956996A EP1034552B1 EP 1034552 B1 EP1034552 B1 EP 1034552B1 EP 98956996 A EP98956996 A EP 98956996A EP 98956996 A EP98956996 A EP 98956996A EP 1034552 B1 EP1034552 B1 EP 1034552B1
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EP
European Patent Office
Prior art keywords
spring
elements
electrical switch
switch
arrangement
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 - Lifetime
Application number
EP98956996A
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German (de)
English (en)
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EP1034552A1 (fr
Inventor
Robert Andrew O'neill
Paul Boundy
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.)
Otter Controls Ltd
Original Assignee
Otter Controls Ltd
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
Priority claimed from GBGB9725401.5A external-priority patent/GB9725401D0/en
Application filed by Otter Controls Ltd filed Critical Otter Controls Ltd
Publication of EP1034552A1 publication Critical patent/EP1034552A1/fr
Application granted granted Critical
Publication of EP1034552B1 publication Critical patent/EP1034552B1/fr
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Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/04—Energy stored by deformation of elastic members
    • H01H5/18—Energy stored by deformation of elastic members by flexing of blade springs
    • H01H5/22—Energy stored by deformation of elastic members by flexing of blade springs blade spring with at least one snap-acting leg and at least one separate contact-carrying or contact-actuating leg
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/04—Energy stored by deformation of elastic members
    • H01H5/18—Energy stored by deformation of elastic members by flexing of blade springs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
    • H01H2037/5472—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting having an omega form, e.g. the bimetallic snap element having a ring shape with a central tongue
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/04—Bases; Housings; Mountings
    • H01H37/043—Mountings on controlled apparatus
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/60—Means for producing snap action
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/04—Energy stored by deformation of elastic members
    • H01H5/18—Energy stored by deformation of elastic members by flexing of blade springs
    • H01H5/22—Energy stored by deformation of elastic members by flexing of blade springs blade spring with at least one snap-acting leg and at least one separate contact-carrying or contact-actuating leg
    • H01H5/24—Energy stored by deformation of elastic members by flexing of blade springs blade spring with at least one snap-acting leg and at least one separate contact-carrying or contact-actuating leg having three legs

Definitions

  • This invention concerns improvements relating to thermally-responsive actuators, particularly though not exclusively actuators comprising bimetallic elements, and to control devices, electrical switches for example, incorporating the same. Whilst the invention will be particularly described in the following by reference to electrical switches incorporating thermally-responsive actuators and designed to switch off kettles and other water boiling appliances in response to the generation of steam when water boils in the appliance, the invention is not limited to such an application.
  • the size restraint to which controls for automatic kettles are subject means that the achievement of large creepages and clearances is difficult, since long cantilever contact springs would normally be required to ensure that the mechanical properties of the spring material were not exceeded as a result of the relatively large deflections required to obtain acceptably large contact separation. If the target contact separation was 3mm for example, the length of cantilever spring that would be required would be too long to fit within a reasonably sized control.
  • Electrical switches including a contact spring in an overcentre arrangement wherein the contact spring is adapted to move with a snap action between two alternative stable positions on opposite sides of an intermediate unstable position are also known, for example from US-A-2 883 488.
  • an electrical switch including a contact spring in an overcentre arrangement wherein the contact spring is adapted to move with a snap action between two alternative. stable positions on opposite sides of an intermediate unstable position characterized in that, said contact spring comprises three elements extending from a cross-member, said three elements each being attached to said cross-member at one end and being free at its other end and the outer two of said three elements extending generally in the same direction and the middle one of said three elements extending generally in the same direction or in the opposite direction, the middle one of said three elements constituting a spring member of said overcentre arrangement and being sprung between opposing abutment points, one at the free end of the respective middle element and the other at the opposite side of said cross-member, and the outer two of the three elements carrying contacts at their free ends and being movable by rotation about the abutment point at the opposite side of the cross-member when the overcentre arrangement moves between its two stable positions.
  • the present invention resides in the appreciation that the requisite increased contact separation can be obtained by use of a contact spring which moves by rotation about a fulcrum rather than by elastic deformation as in the case of the prior art cantilevered springs.
  • the spring is subjected to substantially no stress and increased contact separation can readily be achieved without prejudicing the mechanical properties of the spring material.
  • a generally E-shaped spring is employed in which the central element of the E is formed as a C-spring
  • the C-spring element of the spring is assembled with the free end of a pivotally mounted lever between spaced apart abutments to form an overcentre arrangement, known per se from the J-type steam control aforementioned for example, and the outer (top and bottom) elements of the E extend on opposite sides of this overcentre arrangement.
  • thermally-responsive actuator such as a bimetal or shape memory effect (SME) device for example so as to constitute a thermally-responsive switch.
  • SME shape memory effect
  • the E-shaped spring could itself be formed of bimetallic material, and/or a second thermally-responsive actuator might be provided, for the purpose of ensuring operability of the device in the event, however unlikely, of failure to operate of the primary thermally-responsive actuator, and such secondary operation might be arranged to be operable only after a time delay such as to accommodate normal operation without operation of the secondary protection
  • a generally E-shaped spring 1 formed of beryllium copper for example and comprising an upright or rear cross-member portion 2 from which extend upper and lower elements 3 and 4 and a central element 5 which, as shown, is formed as a C-spring.
  • the free (front) ends of the spring elements 3 and 4 are enlarged as shown and electrical contacts 6 and 7 formed of silver or a silver alloy for example are welded or otherwise affixed thereto.
  • FIG 4 shows an exemplary steam sensor device in which the E-spring 1 is assembled with a pivotally-mounted trip lever 8 between spaced apart abutments 9 and 10 so as to define an overcentre arrangement which is movable with a snap action between stable positions on opposite sides of an unstable central position.
  • the abutments 9 and 10 are formed in a body part 11 of the device and the action of the overcentre arrangement is made temperature responsive by mounting a bimetal 12 on the body part 11 and providing a push rod 13 which couples the bimetal movement to the overcentre arrangement.
  • the steam sensor of Figure 4 is described more fully in the following.
  • the E-spring 1 has a region 14 which rotates in the fulcrum defined by the abutment 9 as the trip lever 8 moves between its stable positions, the movement of this region 14 following the movement of the central C-spring element 5 of the E-spring 1.
  • the two outer (upper and lower) elements 3 and 4 of the E-spring 1 therefore also rotate and the movement at their free ends depends only on the angle of rotation and the lengths of the elements 3 and 4.
  • Figure 3 shows an exemplary arrangement wherein the contacts 6 and 7 that are provided on the undersides of the free ends of the elements 3 and 4 of the E-spring 1 co-operate with fixed contacts 15 and 16 that are provided on supply terminals 17 and 18 of the Figure 4 control.
  • the interaction between these two sets of contacts is advantageously such that the fixed contacts 15 and 16 limit to clockwise movement of the ends of the outer elements 3 and 4 of the E-spring so that they generate a contact force such as to ensure good current carrying capability.
  • This is accompanied by deformation of the elements 3 and 4 by much less than the total movements of the elements 3 and 4 as the E-spring 1 rotates. Since the outer elements 3 and 4 perform no other function than providing this contact force, their design can be optimised for this task.
  • the E-spring 1 operates as a movable contact bridge between the fixed contacts 15 and 16 that are provided on the supply terminals 17 and 18.
  • the outer elements 3 and 4 of E-spring 1 pivoted anti-clockwise, there is a large contact gap between the contacts 6 and 15 and between the contacts 7 and 16. If each of these gaps is 3mm or more, the combined gap of both sets of contacts is 6mm or more which is well in excess of design requirements for electrical safety.
  • a further effect of the described E-spring 1 as incorporated into the arrangement of Figure 4 is that as the trip lever 8 is moved from its stable ON position towards the unstable central position of the overcentre arrangement, so the C-spring central element 5 of the E-spring is subjected to compressive end loading which, as shown in Figures 2A and 2B where the arrows F represent the compressive force, causes the portion 14 to rotate in a clockwise direction which increases the contact forces between moving contacts 6 and 7 and fixed contacts 15 and 16. This ensures that good contact force is maintained until the trip lever 8 passes through its unstable position whereupon the contacts snap open.
  • the C-spring element 5 of the E-spring 1 must be formed in the direction shown in the drawings, namely with its concavity towards the side of the E-spring 1 on which the contacts 6 and 7 are provided, and the contacts must be arranged such that they remain closed until the trip lever 8 has passed through its central unstable position.
  • the region 14 of the E-spring 1 is shown as extending from the rear cross-member 2 of the spring for a short distance before the C-spring part 5 begins, and it is the effect of the forces within the C-spring 5 on this region 14 which generates the torque leading to the increased contact force as the trip lever begins to switch OFF.
  • the contact force generated between the movable contacts 6 and 7 and the fixed contacts 15 and 16 has an additional effect in that it acts in a direction such as to assist the bimetal 12 in moving the trip lever 8 from its ON to its OFF position.
  • the E-spring 1, the trip lever 8 and the terminals 17 and 18 are adapted to be assembled with the moulding 11 to form an inner moulding sub-assembly 19 as shown in Figure 5B.
  • the moulding 11 has spaced apart abutments 9 and 10, the former of which serves to receive the rectangular notch 20 that is provided in the rear edge of E-spring 1 and the latter of which serves to receive pivotal V-bearings 21 provided on the trip lever 8.
  • the forward edge 22 of the C-spring portion 5 of E-spring 1 is received in a V-notch 23 formed in the front edge of the trip lever 8.
  • the abutments 9 and 10 of the moulding 11 are spaced apart by a distance less than the sum of the length of the E-spring between its edges 20 and 22 in its relaxed condition and the length between the V-notch 23 and the V-bearings 21 of the trip lever so that the combination of E-spring 1 and trip lever 8 have to be sprung into the abutments 9 and 10 and thereby form an overcentre arrangement as hereinbefore described.
  • Accommodating formations 24 are provided in the moulding 11 for receiving the terminals 17 and 18.
  • FIG 5B shows the inner moulding sub-assembly 19 formed by assembly of the components shown in Figure 5A and further shows a cover moulding 25 into which the sub-assembly 19 is adapted to be fitted.
  • Figure 5C shows the sub-assembly 19 and the cover moulding 25 from the opposite side and it can be seen that the cover moulding 25 has provision for mounting a bimetallic blade 26 thereon, the blade 26 being adapted to be push fitted into an accommodating recess 27 on the back of the cover 25.
  • the bimetal blade 26 is shown as a circular disc-shaped blade having a central cut-out 28 which defines a tongue 29.
  • the blade 26 is dished so as to be movable between oppositely curved configurations with a snap action and the cut-out 28 and tongue 29 provide for greater movement at the free end of the tongue than would be obtained from a plain disc, as is well known.
  • a push rod 30 passes through an opening 31 in the cover 25 and through a registering opening 32 in the moulding 11.
  • One end of the push rod 30 underlies the free end of the tongue 29 of bimetal 26 and the other end underlies the trip lever 8.
  • a small notch 33 is formed in the periphery of bimetal 26 and registered with a wedge-shaped (in side elevation view) projection 34 formed on cover 25 so as properly to locate the bimetal.
  • the wedge shape of the projection 34 permits the bimetal to be inserted into its accommodating recess and prohibits its return.
  • a better showing of the wedge shaped projection 34 is to be seen in Figures 7A and 7B.
  • Figures 6A through 6H are various elevation, perspective and sectional views of the aforedescribed steam sensor device which are included herein for the sake of completeness but will not be further described.
  • Figures 7A and 7B are enlarged views similar to Figures 6G and 6H and these enlarged views clearly show the ON and OFF conditions of the device, Figure 7A showing the contacts-closed ON condition of the device and Figure 7B showing the OFF condition of the device wherein the contacts are widely open.
  • both limbs 3 and 4 of the E-spring 1 contribute to the large contact gap, it is only necessary for one of the limbs to carry out the current make and break. This allows smaller cheaper contacts (or simply silver plating) on the other limb, reducing contact cost.
  • the limb which makes and breaks the current may be arranged to make last and break first, by adjusting the relative heights of the fixed contacts and/or by adjusting the shape of the spring.
  • the lower side of the trip lever is arranged to enclose the push rod hole 32 when the switch is in the "ON” position, thus complementing the tapered head of the push rod which functions when the switch is in the "OFF” position.
  • the top surface of the control where the top of the trip lever 8 projects, is arranged to ensure that water spilt over the control is safely directed away from any electrical components, and rib features are included on the outside of the cover to engage mating appliance features to enhance this effect.
  • the embodiments are exemplary only and the modifications and variations thereto will occur to those possessed of the appropriate skills without departure from the scope of the invention as set forth in the appended claims.
  • the outer elements 3 and 4 of the E-spring 1 could additionally extend on the opposite side of the cross-member 2 so as to form a generally H-shaped spring having the C-spring 5 extending from the cross piece of the H-shape.
  • One possible means comprises the formation of the E-spring 1 from bimetallic material.
  • An abutment might be provided close to one of the limbs 3,4 or to both of them such that as the limb deflects as its temperature rises, so it contacts the abutment and causes the E-spring to move over-centre.
  • no abutment may be provided and the limbs 3,4 may simply bend as their temperature rises until the contact sets 6,15 and 7,16 are opened so as to break the circuit, albeit with some arcing.
  • the E-spring may be arranged to be heated by the passage of electric current through the spring and/or by the general rise in the temperature of the steam sensor device overall as it is heated by steam.
  • such a mechanism for opening the switch contacts would be arranged to be operative only after a delay of about 5 minutes, to avoid the possibility of nuisance operation before the vessel contents have had time to be boiled under normal conditions.
  • the heating of the E-spring can be adjusted to achieve this, if necessary, by the inclusion of suitable heat conductors (or insulators) from the hot areas of the steam sensor control, most notably the area of the bimetal 26.
  • a less preferred option is to provide a separate thermal actuator, such as a bimetal or SME (shape memory effect) actuator, and arrange for this actuator to act on the trip lever.
  • a separate thermal actuator such as a bimetal or SME (shape memory effect) actuator
  • SME shape memory effect

Landscapes

  • Thermally Actuated Switches (AREA)

Abstract

L'invention porte sur un contacteur de détection de vapeur d'une chaudière automatique utilisant un actionneur bimétallique à déclic permettant de déclencher un dispositif à arc-boutement au moyen d'une tige poussoir, ce dispositif à arc-boutement comprenant un ressort en C et un levier de déclenchement en suspension entre des butées espacées. Selon les dispositifs de ce type de la technique antérieure, le levier de déclenchement a été agencé de façon à avoir une interaction avec des éléments de contact à ressort en porte-à-faux qui subissent une déformation mécanique dans des opérations de commutation, alors que dans le détecteur de vapeur de l'invention, ces éléments de contact à ressort sont intégrés au ressort en C de sorte qu'ils pivotent autour d'un point d'articulation lorsque le dispositif à arc-boutement commute entre ses deux états stables et ne sont pas soumis à une déformation mécanique. Ce dispositif de contact, qui utilise un ressort en forme de E renfermant au milieu de ses trois courses horizontales le ressort en C, permet de mieux séparer les contacts d'un petit commutateur que le dispositif traditionnel en porte-à-faux, et augmente ainsi la sécurité électrique.

Claims (16)

  1. Commutateur électrique comprenant une lame porte-contact (1) dans un agencement en arc-boutement dans lequel la lame porte-contact (1) est adaptée pour un mouvement à action rapide entre deux positions stables alternatives sur les côtés opposés d'une position instable intermédiaire, caractérisé en ce que ladite lame porte-contact (1) comprend trois éléments (3, 4, 5) s'étendant depuis une traverse (2), lesdits trois éléments (3, 4, 5) étant chacun fixé à ladite traverse (2) au niveau d'une extrémité et libre au niveau de son autre extrémité et les deux éléments extérieurs (3, 4) desdits trois éléments (3, 4, 5) s'étendant généralement dans la même direction ou dans la direction opposée, l'élément intermédiaire (5) desdits trois éléments (3, 4, 5) constituant un élément formant ressort dudit agencement en arc-boutement et étant élastique entre les points de butée opposés (9, 23), un (23) au niveau de l'extrémité de l'élément intermédiaire respectif (5), et l'autre (9) au niveau du côté opposé de ladite traverse (2) et les deux éléments extérieurs (3, 4) des trois éléments (3, 4, 5) portant les contacts (15, 16) au niveau de leurs extrémités libres et étant mobiles par rotation autour du point de butée (9) au niveau du côté opposé de la traverse (2) lorsque l'agencement en arc-boutement se déplace entre ses deux positions stables.
  2. Commutateur électrique selon la revendication 1, dans lequel ladite lame porte-contact (1) est généralement de la forme d'un E.
  3. Commutateur électrique 1 ou 2, dans lequel ladite traverse (2) et lesdits deux éléments extérieurs (3, 4) desdits trois éléments (3, 4, 5) sont généralement coplanaires.
  4. Commutateur électrique selon la revendication 1, 2 ou 3, dans lequel ledit élément intermédiaire (5) desdits trois éléments (3, 4, 5) possède une première partie s'étendant depuis ladite traverse (2) généralement dans la même direction que les deux éléments extérieurs (3, 4) et une deuxième partie s'étendant depuis ladite première partie et constituant l'élément formant ressort (5) dudit agencement en arc-boutement.
  5. Commutateur électrique selon l'une quelconque des revendications précédentes, dans lequel l'élément formant ressort (5) de l'agencement en arc-boutement comprend un ressort en forme de C et la concavité du ressort en forme de C est sur le même côté que la lame porte-contact (1) comme le sont les contacts (15, 16) au niveau des extrémités libres des deux éléments extérieurs formant ressort.
  6. Commutateur électrique selon l'une quelconque des revendications précédentes, dans lequel la lame porte-contact (1) est composée d'un matériau bimétallique.
  7. Commutateur électrique selon l'une quelconque des revendications précédentes, dans lequel l'élément intermédiaire formant ressort (5) est agencé dans un agencement en arc-boutement avec un levier de déclenchement (8) du commutateur.
  8. Commutateur électrique selon la revendication 7 comprenant une partie de corps (11) définissant des butées espacées (9, 10) entre lesquelles ledit élément formant ressort intermédiaire (5) et ledit levier de déclenchement (8) sont agencés, chacun desdits éléments formant ressort intermédiaire (5) et levier de déclenchement (8) pouvant pivoter dans une des butées respectives au niveau d'une première extrémité respective et étant couplés de manière pivotante l'un à l'autre au niveau des deuxièmes extrémités.
  9. Commutateur électrique selon la revendication 7 ou 8 comprenant un actionneur sensible thermiquement (12) couplé audit agencement en arc-boutement destiné à déterminer l'état de celui-ci.
  10. Commutateur électrique selon la revendication 9, dans lequel ledit actionneur sensible thermiquement (12) comprend un élément bimétallique couplé au moyen d'une barre de liaison (13) audit agencement en arc-boutement.
  11. Commutateur électrique selon la revendication 9 ou 10, dans lequel ledit actionneur sensible thermiquement (12) est sensiblement isolé des composants électriques (17, 18) du commutateur en vertu desdits composants étant enfermés à l'intérieur d'un boítier de commutateur (25) et ledit actionneur sensible thermiquement (12) étant proposé en dehors dudit boítier.
  12. Commutateur électrique selon les revendications 9, 10 ou 11 comprenant en outre un deuxième actionneur sensible thermiquement couplé audit agencement en arc-boutement destiné à déterminer l'état de celui-ci indépendamment de l'actionneur sensible thermiquement mentionné en premier lieu.
  13. Commutateur électrique selon la revendication 12, dans lequel ledit deuxième actionneur sensible thermiquement est agencé de manière à pouvoir fonctionner uniquement après une temporisation telle qu'en fonctionnement normal afin de permettre le fonctionnement du commutateur par l'actionneur sensible thermiquement mentionné en premier lieu.
  14. Commutateur électrique selon l'une quelconque des revendications précédentes, dans lequel l'agencement est tel que dans les opérations de commutation de ladite lame porte-contact (1) l'un desdits deux éléments extérieurs (3, 4) ouvre le contact avant et ferme le contact après l'autre.
  15. Commutateur électrique selon l'une quelconque des revendications précédentes configuré en tant que capteur de vapeur pour une cuve d'ébullition d'eau chauffée électriquement, ledit capteur de vapeur étant adapté pour éteindre l'alimentation en électricité vers l'élément de chauffage de la cuve en réponse à la génération de vapeur lorsque l'eau bout dans la cuve.
  16. Cuve d'ébullition d'eau chauffée électriquement incluant un capteur de vapeur selon la revendication 15.
EP98956996A 1997-11-28 1998-11-30 Ameliorations apportees a des actionneurs a sensibilite thermique Expired - Lifetime EP1034552B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GBGB9725401.5A GB9725401D0 (en) 1997-11-28 1997-11-28 Improvements relating to thermally-responsive actuators
GB9725401 1997-11-28
GB9811400 1998-05-27
GB9811400A GB2331848B (en) 1997-11-28 1998-05-27 Improvements relating to thermally responsive actuators
PCT/GB1998/003571 WO1999028935A1 (fr) 1997-11-28 1998-11-30 Ameliorations apportees a des actionneurs a sensibilite thermique

Publications (2)

Publication Number Publication Date
EP1034552A1 EP1034552A1 (fr) 2000-09-13
EP1034552B1 true EP1034552B1 (fr) 2003-01-22

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EP98956996A Expired - Lifetime EP1034552B1 (fr) 1997-11-28 1998-11-30 Ameliorations apportees a des actionneurs a sensibilite thermique

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EP (1) EP1034552B1 (fr)
CN (1) CN1132206C (fr)
AU (1) AU1342799A (fr)
DE (1) DE69810963T2 (fr)
GB (1) GB2363908B (fr)
WO (1) WO1999028935A1 (fr)

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GB2431516A (en) * 2005-10-19 2007-04-25 Otter Controls Ltd Improvements relating to thermal control units
EP2741641B1 (fr) * 2011-08-10 2016-08-10 Strix Limited Commandes
CN104037016B (zh) * 2014-06-27 2016-02-24 佛山市川东磁电股份有限公司 一种新型磁性接近开关
CN105244227B (zh) * 2015-11-24 2017-07-21 佛山市溢釜科技有限公司 一种助力型磁性接近开关
CN105405717B (zh) * 2015-11-24 2017-07-18 佛山市溢釜科技有限公司 一种助力回复磁性接近开关
CN105788961B (zh) * 2016-04-22 2018-07-10 佛山市富乐喜电子信息技术有限公司 一种紧凑型温控器
IT201700050295A1 (it) * 2017-05-10 2018-11-10 Bitron Spa Metodo di accoppiamento di un filo con terminale elettrico e attuatore realizzato utilizzando tale metodo.
EP3642860A4 (fr) * 2017-06-21 2021-03-31 Introl IP Limited Interrupteur électrique et lame de commutation associée

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US4376925A (en) * 1980-01-16 1983-03-15 Taylor John C Switch units for electric immersion heaters
DE3887734T2 (de) * 1987-11-23 1994-05-19 Otter Controls Ltd Temperatur emfindliche elektrische Schalter.
GB8800088D0 (en) * 1988-01-05 1988-02-10 Strix Ltd Thermally responsive actuators & electrical controls incorporating such actuators
GB8807563D0 (en) * 1988-03-30 1988-05-05 Strix Ltd Electric immersion heaters
GB8818646D0 (en) * 1988-08-05 1988-09-07 Strix Ltd Thermally-responsive actuators & electrical controls incorporating such actuators
GB9400543D0 (en) * 1994-01-13 1994-03-09 Strix Ltd Water heating apparatus
GB2308743B (en) * 1994-06-09 1998-04-15 Strix Ltd Water heating vessels
GB2329523B (en) * 1997-09-17 2001-03-21 Strix Ltd Thermally Sensitive Controls

Also Published As

Publication number Publication date
WO1999028935A1 (fr) 1999-06-10
CN1286798A (zh) 2001-03-07
CN1132206C (zh) 2003-12-24
GB2363908B (en) 2002-03-06
AU1342799A (en) 1999-06-16
DE69810963D1 (de) 2003-02-27
DE69810963T2 (de) 2003-06-05
GB2363908A (en) 2002-01-09
EP1034552A1 (fr) 2000-09-13
GB0121868D0 (en) 2001-10-31

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