EP1458003A1 - Temperature sensor - Google Patents

Temperature sensor Download PDF

Info

Publication number
EP1458003A1
EP1458003A1 EP04450054A EP04450054A EP1458003A1 EP 1458003 A1 EP1458003 A1 EP 1458003A1 EP 04450054 A EP04450054 A EP 04450054A EP 04450054 A EP04450054 A EP 04450054A EP 1458003 A1 EP1458003 A1 EP 1458003A1
Authority
EP
European Patent Office
Prior art keywords
housing
rod
switch
temperature sensor
coefficient
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04450054A
Other languages
German (de)
French (fr)
Other versions
EP1458003B1 (en
Inventor
Dr. Paul Losbichler
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.)
Electrovac AG
Original Assignee
Electrovac 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
Priority to AT3622003 priority Critical
Priority to AT0036203A priority patent/AT412521B/en
Application filed by Electrovac AG filed Critical Electrovac AG
Publication of EP1458003A1 publication Critical patent/EP1458003A1/en
Application granted granted Critical
Publication of EP1458003B1 publication Critical patent/EP1458003B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00Thermally-actuated switches
    • H01H37/02Details
    • H01H37/32Thermally-sensitive members
    • H01H37/46Thermally-sensitive members actuated due to expansion or contraction of a solid
    • H01H37/48Thermally-sensitive members actuated due to expansion or contraction of a solid with extensible rigid rods or tubes
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00Thermally-actuated switches
    • H01H37/02Details
    • H01H37/10Compensation for variation of ambient temperature or pressure
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00Thermally-actuated switches
    • H01H37/02Details
    • H01H37/32Thermally-sensitive members
    • H01H2037/326Thermally-sensitive members with radiative heat transfer to the switch, e.g. special absorption surfaces
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00Thermally-actuated switches
    • H01H37/02Details
    • H01H37/12Means for adjustment of "on" or "off" operating temperature
    • H01H37/20Means for adjustment of "on" or "off" operating temperature by varying the position of the thermal element in relation to switch base or casing
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00Thermally-actuated switches
    • H01H37/02Details
    • H01H37/32Thermally-sensitive members

Abstract

The tube (8) of the temperature sensor (7) extends all the way across the top of the circular heating element (1). It contains a first long rod (L1.9) which expands when heated and presses on the end of a short rod (L2.9) which extends into a housing (10). The housing contains electrical contacts (11,12) which may be pushed together by expansion of the first rod. The two rods have different coefficients of expansion to compensate for expansion of the housing. The housing may be rotated as a knob (18) to alter the setting of the switch.

Description

The invention relates to a temperature sensor according to the preamble of claim 1.

Such a temperature sensor is e.g. in EP 0 141 923 B. It is in this known solution in the pot of the radiant heater one from the bottom of the pot towering circumferential rib provided, which separates two separately controllable heating coils.

In this case, the tube of the temperature sensor extends over both heating coils away, wherein However, in this a three-piece rod is held, the middle part is only on the Area of the central heating coil extends. The two outer parts of the Rods, which lie with their front sides against the middle part of the rod, have one Thermal expansion coefficient, at least that of the surrounding pipe corresponds, which is integrally formed, whereas the middle part of the rod is smaller than that of the surrounding pipe.

In a reverse design, where the coefficient of expansion of the middle part of the rod is greater than that of the surrounding pipe, have the outer parts of the rod has a coefficient of expansion which is at most as large as that of the surrounding pipe is, but preferably smaller.

By this measure, it happens that the outer parts of the rod, the are in the areas of the outer heating coil, equal or more than that they surrounding pipe, thereby overcompensating the influence of the switchable Heating coil is achieved and the temperature sensor is essentially the temperature in the central area of the pot and thus the temperature in the area of the inner heating coil detected.

Furthermore, a solution is described in the above-mentioned document, in which the tube is also formed in three parts, wherein the parts of the tube substantially with those cover the staff. In this case, the central portion of the tube has a larger one Thermal expansion coefficient on as the outer sections of the tube and the outer Parts of the rod have a larger thermal expansion coefficient than the middle one Section of the bar. Here are the outer sections, or parts of the tube and the Bar arranged in the region of the outer heating coil. Also in this case it comes to

Compensation of the influence of the switchable outer heating coil.

These solutions occur despite the compensation of the influence of the outside Heating coil for a shift of the switching point of the temperature sensor. This is conditional by the circumstance that inevitably heat from the pot of the Radiant heater in these receiving boiler room due to Heat transfer and heat radiation transgresses, whereby the housing of the Extends switch according to its thermal expansion coefficient and thereby the Switching point influenced.

In conventional temperature sensors for radiant heater with a continuous rod, the is held in a connected to the housing of a switch tube and in the Housing the switch hineinerstreckt it comes to a very noticeable drop in the Response temperature when the housing of the switch heats up, mostly steatite is made and located outside the pot of the radiant heater. This makes it is necessary to set the response temperature of the probe accordingly high, what to do leads that the actual response temperature with cold housing of the switch relatively strong is excessive.

The aim of the invention is to avoid this disadvantage and a temperature sensor of to suggest at the outset, in which a stronger overshoot of the desired Response temperature is avoided with a cold switch housing.

According to the invention this is in a temperature sensor of the type mentioned by the characterizing features of claim 1 achieved.

These measures make it possible to extend the housing of the switch take into account and the shift of the switching point of the switch just because of To avoid thermal expansion of its housing largely or entirely.

Another problem is that in a receiving a heating coil pot generated heat through the wall of the pot through into this pot receiving Boiler hearth of a cooker occurs, causing it to heat up. Especially at the Arrangement of several radiant heaters in a boiler room of a cooker arise at a full load operation of the stove, in which all radiators of the Cookers are in operation, relatively high temperatures in the boiler room. For security reasons may but the boiler room temperature, or with this in a dependency relationship Wandanstelltemperatur a cooker do not exceed a certain value.

Due to the features of claim 2 is now achieved that in a cooker with several cooking zones and thus radiant heaters at the successive Switching on the individual cooking zones switching the individual temperature sensors is tunable. This is done by choosing the coefficients of thermal expansion of the in the Housing of the switch protruding part of the rod and the housing of the switch. Due to the proposed selection criteria for the thermal expansion coefficients it comes to a partial compensation of the effect of thermal expansion of the Housing of the switch and thus at higher boiler room temperatures to a switching at lower temperatures, causing an excessive increase in the boiler room temperature and thus the Wandanstelltemperatur is avoided.

Due to the features of claim 3, there is the advantage that the influence of Thermal expansion of the housing of the switch can be almost completely compensated. As a result, a control of the radiant heater is substantially independent of the Temperature in the boiler room in which the or the radiant heater is or are arranged.

Due to the features of claim 4, there is the advantage that by choosing a corresponding heat absorption coefficient the response time of the temperature sensor of the Switch can be influenced, whereby also the switching time of the assigned Switch can be influenced. Thereby it is possible the warming up performance of the appropriate radiant heater to optimize.

Due to the features of claim 5 and 6 can in a simple way the Heat absorption coefficient of the two parts of the rod can be adjusted.

With regard to an optimization of the cooking performance of an inventive Radiant heater, it is particularly advantageous the features of claim. 7 provided.

The invention will be further described with reference to the accompanying drawings, in which embodiments are shown. Showing:

  • 1 shows schematically a boiler room of a cooker with a radiant heater in a vertical section,
  • Fig. 2 is a plan view of the radiant heater according to FIGS. 1 and
  • Fig. 3 shows schematically a temperature sensor according to the invention in a larger scale.
  • The reference numeral 1 denotes a radiant heater which comprises a pot 2, in which a spirally placed heating coil 3 is located in an embedding 4 is embedded. The radiant heater 1 is below a plate 5 made of metal, Glass ceramic, od. The like. Arranged, which has the cooking surface 6 at its top. Between the cooking surface 6 and the heating coil 3, a temperature sensor 7 is arranged, which with a Switch button 18 is in communication, which latter is not shown. It is the Temperature sensor in a simple manner by drilling in the substantially cylindrical Wall of the radiant heater 1, and its pot 2 passed.

    The temperature sensor 7 is thus exposed to the temperature below the cooking surface. 6 in the radiation space between the cooking surface 6, or the supporting plate 5 and the Heating coil 3 prevails and can thus capture this temperature.

    The structural design of the temperature sensor 7 is shown in FIG. 3.

    Essentially, the temperature sensor 7 comprises an outer tube 8 made of a material a relatively high thermal expansion coefficient, e.g. from a metal, in particular steel, a two-piece rod 9 held in its interior, both of which Parts with L1 and L2 are designated, as well as held in a housing 10 switch 18, at the movable switching contact 11, which is biased against its open position, the rod 9 rests with its part L2 which extends into the housing 10 of the switch 8 hineinerstreckt. The fixed contacts of the switch 18 are denoted by 12 and with Outlets 13 connected.

    The one end of the tube 8, which may have any cross-section, is completed, this also by an optionally adjustable holder (not shown) for the rod 9, or its part L1 can be carried out. It extends in the built-in state of the temperature sensor 7 of the part L1 of the rod 9 over the range of Radiant heater 1, over which the heating coil 3 extends. The second part of the L2 Bar 9 is located in the region of the wall of the pot 2, which consists of a poorly heat-conducting Material is made, lies in the region of this wall frontally to the part of the rod L1 and extends into the housing 10 of the switch 18, which is outside the Radiant heater 1 is located, but in the boiler room of a cooker that is not closer is shown, is arranged, whereby the housing 10 of the boiler room in the boiler room is exposed to prevailing temperature.

    The tube 8 of the temperature sensor 7 is fixedly connected to the housing 10 of the switch 18.

    When the heating coil 3 is turned on, the temperature sensor of the heat radiation of Heating coil, or in the radiant heater 1 between the heating coil 3 and the plate fifth exposed to prevailing temperature. As a result, the tube 8 expands, which considerably larger coefficients of thermal expansion than the part L1 of the rod 9 is stronger, as the rod part L1, whereby the pressure on the movable contact 11 decreases. Upon reaching a corresponding temperature succeeds the contact 11 due to its bias in go over its open position and interrupt the circuit to the heating coil 3.

    Since heat from the space of the radiant heater 1 through the wall of his pot. 2 goes through, and the heating chamber and thus the housing 10, which is also heated according to its thermal expansion coefficient expands, which is a corresponding Displacement of the fixed contacts 12 of the switch relative to the end of the tube 8 causes and thus a shift of the switching point of the switch 18th

    To avoid this, or to limit this effect to a well-tolerated level, points the extending into the housing 10 of the switch 18 part L2 of the rod 9 a Thermal expansion coefficient, in conjunction with its axial extent a Product which, depending on the product, has the coefficient of thermal expansion of Housing 10 and its extension in the direction of the rod 9 of his the wall of the Topfes 2 facing end to the holders of the fixed contacts 12 is selected.

    If these products are the same, the result is a substantially complete Compensation of the thermal expansion of the housing 10 and thus a substantially complete compensation of the influence of the heating of the housing 10 due to heat diffusing through the wall of the pot 2.

    On the other hand, if these products are chosen to be the product Thermal expansion coefficient of extending into the housing 10 in part 12th of the rod 9 smaller than the product of the coefficient of thermal expansion and extension of the Housing between the pot 2 of the radiant heater 1 facing the end and the holders of its fixed contacts 12 in the axial direction of the rod 9 is, so it comes with increasing heating of the housing to a shift of the switching point of Switch 18 toward lower temperatures on the assumption that the movable contact 11 of the switch 18 toward the tube 8 opens.

    In principle, another configuration of the movable contact 11 is possible. So this can also be biased towards its closed position. In this case the rod part L1 has a larger thermal expansion coefficient than the tube 8 and the products mentioned above must be reversed in such a case in order to in the sense of a kinematic reversal to achieve the same effect.

    In the above sense imperfect compensation of the influence of the heating of the Housing 10 may be desirable to ensure that as the temperature of the Housing, which also requires a rising temperature in the boiler room of the cooker, which again causes an increasing Wandanstelltemperatur of the stove, the Radiant heaters and thus also the boiler room, supplied energy is reduced, due to the switch-off by the switch 18 at lower temperatures in the Radiant heater 1.

    Furthermore, the two parts L1, L2 of the rod 9 have different Heat absorption coefficient, wherein the part L2 of the rod 9 is preferably a having lower heat absorption coefficient. The lower one Heat absorption coefficient causes a lower heat absorption or heating of the rod 9, which is why the temperature equilibrium with the housing later is reached.

    In this way it is achieved that the switching temperature when switching on the heater, i. when the housing of the radiant heater is cold, is higher than the switching temperature in Temperature equilibrium state. It therefore comes when switching on cold housing to an overshoot behavior of the temperature sensor. This allows the The cooking performance is optimized, which means that when the heater is switched on cold condition a higher glass transition temperature is available, causing a shortening the time to reach the cooking temperature is reached.

    The heat absorption coefficient can be adjusted by different colors, different surface design, such as by attaching profilings or different surface roughness and the like. be, or else by different Metallbeimengungen, such as Al 2 O 3 .

    Claims (7)

    1. Temperature sensor (7) for radiant heater (1), in particular a cooker, which radiant heater (1) substantially by a in a pot (2) inserted heating coil (3) is formed, which radiator (1) in an upwards to a through The temperature sensor (7) extending through the cavity of the pot (2) substantially parallel to this covering plate (5) extending therethrough and at least one thermally insulating Wall of the pot (2) passing through the tube (8), one end of which is connected to a housing (10) of a switch (18) having at least one movable switching contact (11) with fixed, held in the housing (10) Contacts (12) cooperates, and in the interior of this closed at its second end tube (8) is held at least one two-piece rod (9) with its one end, which Bar (9) extends into the housing (10) of the switch (18) and actuates the switch contact (11), wherein the tube (8) and the at least two-part rod (9) have different thermal expansion coefficients, characterized in that Part (L2) of the rod (9) which extends into the housing (10) of the switch (18), outside the cavity of the pot (2) ends and the product of the coefficient of thermal expansion of the housing (10) of the switch (18) projecting part (L2) of the rod (9) and its axial extent as a function of the product of the coefficient of thermal expansion of the housing (10) of the switch (18) and extending in the direction of the rod (9) extension up to the holders of the fixed contacts (12) of the switch (18) is selected.
    2. Temperature sensor according to claim 1, characterized in that the product of coefficient of thermal expansion of the housing (10) of the switch (18) protruding part (L2) of the rod (9) and its axial extent smaller than the product of the coefficient of thermal expansion of the housing (10) the switch (18) and the extension of the housing (10) in the direction of the rod (9) to the holders of the fixed contacts (12).
    3. Temperature sensor according to claim 1, characterized in that the product of coefficient of thermal expansion of the housing (10) of the switch (18) and the extension of the housing (10) in the direction of the rod (9) to the holders of the fixed contacts (12) and the Product of coefficient of thermal expansion of the in the housing (10) protruding part (L2) of the rod (9) and its axial extent are substantially equal, wherein the housing (10) and projecting into this part (L2) of the rod (9) preferably are made of the same material and the extent of this part (L2) of the rod (9) is substantially equal to the extent of the housing (10) in the axial direction of the rod (9) to the holders of the fixed contacts (12).
    4. Temperature sensor according to one of claims 1 to 3, characterized in that the two parts (L1, L2) of the rod (9) have a different heat absorption coefficient ε.
    5. Temperature sensor according to claim 4, characterized in that the adaptation of the heat absorption coefficient by shaping the surfaces, eg by coloring, and / or the size of the surface influencing measures, such as profiling of the cross section or adjustment of the roughness of the surface takes place.
    6. Temperature sensor according to claim 4 or 5, characterized in that the adjustment of the heat absorption coefficient by metal additions, eg Al 2 O 3 takes place.
    7. Temperature sensor according to one of claims 4 to 6, characterized in that the heat absorption coefficient of that part (L2) of the rod (9) which extends into the housing (10) of the switch (18) into the corresponding coefficient of the housing (10) is tuned.
    EP04450054A 2003-03-10 2004-03-08 Temperature sensor Active EP1458003B1 (en)

    Priority Applications (2)

    Application Number Priority Date Filing Date Title
    AT3622003 2003-03-10
    AT0036203A AT412521B (en) 2003-03-10 2003-03-10 Probe

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    AT04450054T AT329364T (en) 2003-03-10 2004-03-08 Probe
    PL04450054T PL1458003T3 (en) 2003-03-10 2004-03-08 Temperature sensor

    Publications (2)

    Publication Number Publication Date
    EP1458003A1 true EP1458003A1 (en) 2004-09-15
    EP1458003B1 EP1458003B1 (en) 2006-06-07

    Family

    ID=32739107

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP04450054A Active EP1458003B1 (en) 2003-03-10 2004-03-08 Temperature sensor

    Country Status (6)

    Country Link
    US (1) US7119654B2 (en)
    EP (1) EP1458003B1 (en)
    AT (2) AT412521B (en)
    DE (1) DE502004000675D1 (en)
    HK (1) HK1069256A1 (en)
    PL (1) PL1458003T3 (en)

    Families Citing this family (8)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE502004000953D1 (en) * 2004-02-24 2006-08-24 Electrovac Temperature sensor
    JP4916807B2 (en) * 2006-01-30 2012-04-18 株式会社ダイヘン Voltage detection printed circuit board and voltage detector using the same
    GB0717051D0 (en) * 2007-09-01 2007-10-17 Ceramaspeed Ltd Temperature sensor
    DE102008052127A1 (en) 2008-07-18 2010-01-28 Micro-Epsilon Messtechnik Gmbh & Co. Kg Temperature measuring device and method for temperature measurement
    DE102009038960A1 (en) * 2009-08-19 2011-02-24 E.G.O. Elektro-Gerätebau GmbH Temperature sensor and method for adjusting such a temperature sensor
    US8933377B2 (en) 2011-12-09 2015-01-13 E.G.O. Elektro-Gerätebau GmbH Control device for an electrical heating device for a cooking field, cooking field and method for operating such an electrical heating device
    US20130146582A1 (en) * 2011-12-09 2013-06-13 E.G.O. Elektro-Gerätebau GmbH Heating Device, Cooking Field and Method for Operating a Heating Device
    US8884195B2 (en) 2011-12-09 2014-11-11 E.G.O. Elektro-Gerätebau GmbH Heating device, method of producing a heating device and method for operating a heating device

    Citations (6)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE855009C (en) * 1950-11-01 1952-11-10 Erich Dr-Ing Kieback thermostat
    EP0141923A1 (en) * 1983-09-17 1985-05-22 E.G.O. Elektrogeräte AG Temperature limiter for a glass-ceramic cooking unit
    EP0425752A1 (en) * 1989-11-03 1991-05-08 C.A.E.M. S.R.L. An electric adjustable thermostat with temperature compensation
    US5113170A (en) * 1989-09-08 1992-05-12 E.G.O. Elektro-Gerate Blanc U. Fischer Temperature switch
    US6304165B1 (en) * 1998-10-09 2001-10-16 E.G.O. Elektro-Geratebau Gmbh Switching device for an electric heating device
    US20020149465A1 (en) * 2001-04-17 2002-10-17 Electrovac, Fabrikation Elektrotechnischer Spezialartikel Gesellschaft M.B.H. Temperature limiter, and calibration method for operating a switching contact of a temperature limiter

    Family Cites Families (8)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US4008454A (en) * 1975-11-04 1977-02-15 General Electric Company Differential expansion rod and tube thermostat
    US4164642A (en) * 1976-12-20 1979-08-14 Ebert Edward A Radiant-hot air heater
    AT376540B (en) * 1983-01-05 1984-11-26 Electrovac Device comprising at least a temperature value for regulating or limiting or a temperature range of radiation- or kontaktheizkoerpern of electrical cooking appliances
    GB8324271D0 (en) * 1983-09-10 1983-10-12 Micropore International Ltd Thermal cut-out device
    US4886070A (en) * 1988-05-11 1989-12-12 Thermometrics, Inc. Method of in vivo calibration of a pressure sensor
    US5036236A (en) * 1990-05-07 1991-07-30 Hughes Aircraft Company Air gap matching proximity sensor for magnetic bearings
    GB2263770B (en) * 1992-01-23 1994-11-02 Ceramaspeed Ltd Device for controlling or limiting temperature in an electric cooking appliance
    US5390542A (en) * 1993-12-21 1995-02-21 Measurement Technology International Membrane for a fluid flow meter

    Patent Citations (6)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE855009C (en) * 1950-11-01 1952-11-10 Erich Dr-Ing Kieback thermostat
    EP0141923A1 (en) * 1983-09-17 1985-05-22 E.G.O. Elektrogeräte AG Temperature limiter for a glass-ceramic cooking unit
    US5113170A (en) * 1989-09-08 1992-05-12 E.G.O. Elektro-Gerate Blanc U. Fischer Temperature switch
    EP0425752A1 (en) * 1989-11-03 1991-05-08 C.A.E.M. S.R.L. An electric adjustable thermostat with temperature compensation
    US6304165B1 (en) * 1998-10-09 2001-10-16 E.G.O. Elektro-Geratebau Gmbh Switching device for an electric heating device
    US20020149465A1 (en) * 2001-04-17 2002-10-17 Electrovac, Fabrikation Elektrotechnischer Spezialartikel Gesellschaft M.B.H. Temperature limiter, and calibration method for operating a switching contact of a temperature limiter

    Also Published As

    Publication number Publication date
    PL1458003T3 (en) 2006-11-30
    HK1069256A1 (en) 2006-10-27
    AT329364T (en) 2006-06-15
    US7119654B2 (en) 2006-10-10
    ATA3622003A (en) 2004-08-15
    AT412521B (en) 2005-03-25
    US20040178878A1 (en) 2004-09-16
    DE502004000675D1 (en) 2006-07-20
    EP1458003B1 (en) 2006-06-07

    Similar Documents

    Publication Publication Date Title
    DE60117942T2 (en) Koch Heating
    EP0982973B1 (en) Sensor for cooking vessel detection
    JP5885740B2 (en) For example, high-speed heating of a temperature control device for a coffee machine
    EP0551172B1 (en) Radiant heater having multiple heating zones
    US6849835B2 (en) Household food warmer for keeping foods and beverages warm
    AT398874B (en) Electric radiation heating device for cooking appliances with level cooking surface
    ES2306935T3 (en) Electrical heating device with current detector.
    US6904378B2 (en) Method for measuring the temperature of a metal saucepan
    AU2009100811A4 (en) Improved temperature sensor for an electric kettle
    JP4058556B2 (en) A cooking device comprising a radiant electric heater and a temperature detection device
    ES2215794T3 (en) Gas oven.
    JP3000367B2 (en) Apparatus for adjusting the thermal efficiency of the heating element of a cooking or stove plate
    EP0279368B1 (en) Temperature limiter
    JPH081826B2 (en) Radiant heater for cookware
    KR101261647B1 (en) Control method of heating apparatus
    EP1391141B1 (en) Method and device for limiting and/or controlling the surface temperature of a hob
    US4810857A (en) Radiant heater unit
    EP0531987B2 (en) Electrical heating unit
    EP0206597B1 (en) Improvements in or relating to infra-red heaters
    EP0469758B1 (en) Apparatus for controlling heating of a liquid
    WO1999065278A1 (en) Advanced cooking appliance
    DE69832329T2 (en) Method and device for controlling an electrical heating element
    FR2698775A1 (en) Electric coffee maker.
    US4394564A (en) Solid plate heating unit
    WO2008148529A1 (en) Control method for a hob and hob for carrying out said method

    Legal Events

    Date Code Title Description
    AK Designated contracting states

    Kind code of ref document: A1

    Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

    AX Request for extension of the european patent to:

    Extension state: AL HR LT LV MK

    17P Request for examination filed

    Effective date: 20050315

    REG Reference to a national code

    Ref country code: HK

    Ref legal event code: DE

    Ref document number: 1069256

    Country of ref document: HK

    AKX Designation fees paid

    Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

    17Q First examination report despatched

    Effective date: 20050506

    AK Designated contracting states

    Kind code of ref document: B1

    Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

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

    Ref country code: SK

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20060607

    Ref country code: RO

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20060607

    Ref country code: IT

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20060607

    Ref country code: NL

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20060607

    Ref country code: CZ

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20060607

    Ref country code: SI

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20060607

    Ref country code: IE

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20060607

    Ref country code: FI

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20060607

    REG Reference to a national code

    Ref country code: GB

    Ref legal event code: FG4D

    Free format text: NOT ENGLISH

    REG Reference to a national code

    Ref country code: CH

    Ref legal event code: EP

    REG Reference to a national code

    Ref country code: IE

    Ref legal event code: FG4D

    Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

    REF Corresponds to:

    Ref document number: 502004000675

    Country of ref document: DE

    Date of ref document: 20060720

    Kind code of ref document: P

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

    Ref country code: DK

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20060907

    Ref country code: SE

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20060907

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

    Ref country code: ES

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20060918

    RAP2 Rights of a patent transferred

    Owner name: ELECTROVAC AG

    REG Reference to a national code

    Ref country code: HK

    Ref legal event code: GR

    Ref document number: 1069256

    Country of ref document: HK

    GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

    Effective date: 20061009

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

    Ref country code: PT

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20061107

    NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
    ET Fr: translation filed
    REG Reference to a national code

    Ref country code: IE

    Ref legal event code: FD4D

    26N No opposition filed

    Effective date: 20070308

    BERE Be: lapsed

    Owner name: ELECTROVAC, FABRIKATION ELEKTROTECHNISCHER SPEZIA

    Effective date: 20070331

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

    Ref country code: BE

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20070331

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

    Ref country code: MC

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20070331

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

    Ref country code: GR

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20060908

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

    Ref country code: BG

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20060907

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

    Ref country code: EE

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20060607

    PGRI Patent reinstated in contracting state [announced from national office to epo]

    Ref country code: IT

    Effective date: 20080601

    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: CH

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20080331

    Ref country code: LI

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20080331

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

    Ref country code: CY

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20060607

    Ref country code: LU

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20070308

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

    Ref country code: TR

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20060607

    Ref country code: HU

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20061208

    REG Reference to a national code

    Ref country code: DE

    Ref legal event code: R082

    Ref document number: 502004000675

    Country of ref document: DE

    Representative=s name: FRIEDHELM VOMBERG, DE

    REG Reference to a national code

    Ref country code: FR

    Ref legal event code: CJ

    Effective date: 20110923

    Ref country code: FR

    Ref legal event code: TP

    Owner name: CERAMASPEED INC., US

    Effective date: 20110923

    Ref country code: FR

    Ref legal event code: CD

    Owner name: CERAMASPEED INC., US

    Effective date: 20110923

    REG Reference to a national code

    Ref country code: DE

    Ref legal event code: R081

    Ref document number: 502004000675

    Country of ref document: DE

    Owner name: CERAMASPEED INC., US

    Free format text: FORMER OWNER: ELECTROVAC AG, KLOSTERNEUBURG, AT

    Effective date: 20110921

    Ref country code: DE

    Ref legal event code: R082

    Ref document number: 502004000675

    Country of ref document: DE

    Representative=s name: VOMBERG, FRIEDHELM, DIPL.-PHYS., DE

    Effective date: 20110921

    Ref country code: DE

    Ref legal event code: R081

    Ref document number: 502004000675

    Country of ref document: DE

    Owner name: CERAMASPEED INC., MARYVILLE, US

    Free format text: FORMER OWNER: ELECTROVAC AG, KLOSTERNEUBURG, AT

    Effective date: 20110921

    REG Reference to a national code

    Ref country code: FR

    Ref legal event code: PLFP

    Year of fee payment: 13

    REG Reference to a national code

    Ref country code: FR

    Ref legal event code: PLFP

    Year of fee payment: 14

    REG Reference to a national code

    Ref country code: FR

    Ref legal event code: PLFP

    Year of fee payment: 15

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

    Ref country code: FR

    Payment date: 20190326

    Year of fee payment: 16

    Ref country code: IT

    Payment date: 20190321

    Year of fee payment: 16

    Ref country code: PL

    Payment date: 20190208

    Year of fee payment: 16

    Ref country code: GB

    Payment date: 20190325

    Year of fee payment: 16

    Ref country code: DE

    Payment date: 20190325

    Year of fee payment: 16

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

    Ref country code: AT

    Payment date: 20190311

    Year of fee payment: 16

    REG Reference to a national code

    Ref country code: DE

    Ref legal event code: R082

    Ref document number: 502004000675

    Country of ref document: DE

    Representative=s name: VOMBERG, FRIEDHELM, DIPL.-PHYS., DE

    Ref country code: DE

    Ref legal event code: R081

    Ref document number: 502004000675

    Country of ref document: DE

    Owner name: EIKA, S. COOP., ES

    Free format text: FORMER OWNER: CERAMASPEED INC., MARYVILLE, TENN., US

    REG Reference to a national code

    Ref country code: GB

    Ref legal event code: 732E

    Free format text: REGISTERED BETWEEN 20200326 AND 20200401