EP0089383A1 - Quantized (digital) heating plate - Google Patents

Quantized (digital) heating plate Download PDF

Info

Publication number
EP0089383A1
EP0089383A1 EP82102230A EP82102230A EP0089383A1 EP 0089383 A1 EP0089383 A1 EP 0089383A1 EP 82102230 A EP82102230 A EP 82102230A EP 82102230 A EP82102230 A EP 82102230A EP 0089383 A1 EP0089383 A1 EP 0089383A1
Authority
EP
European Patent Office
Prior art keywords
segments
heating plate
digital
heat
sketch
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
EP82102230A
Other languages
German (de)
French (fr)
Other versions
EP0089383B1 (en
Inventor
Turgut Koruk
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP19820102230 priority Critical patent/EP0089383B1/en
Priority to DE8282102230T priority patent/DE3265723D1/en
Publication of EP0089383A1 publication Critical patent/EP0089383A1/en
Application granted granted Critical
Publication of EP0089383B1 publication Critical patent/EP0089383B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01LCHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L7/00Heating or cooling apparatus; Heat insulating devices
    • B01L7/54Heating or cooling apparatus; Heat insulating devices using spatial temperature gradients
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01LCHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L7/00Heating or cooling apparatus; Heat insulating devices
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00Ohmic-resistance heating
    • H05B3/20Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater

Definitions

  • the temperature distribution between the two heating sources B1 and B2 is based solely on the thermal conductivity of the selected material. It prevents the desired temperature distribution even if control points (C3, C4) are relocated to the block area between the heating sources (B1, B2). Even if additional heating sources (B3, B4) are installed in the block area, the result is unsatisfactory.
  • the heating surface is divided into the smallest possible segments (S1, S2, .... Sn).
  • Each individual segment (sketch 3) has a heat source (H) and a heat sensor (W) as a sensor, which are arranged in a mass (M).
  • H heat source
  • W heat sensor
  • M mass
  • the shape of a segment can be chosen so that it meets the geometric requirements for any heating surface.
  • Sketch 2 shows an exemplary arrangement of these segments to form a rectangular heating surface, for example.
  • each segment can assume a defined target temperature that is independent of other segments. Because the heat flow from a warmer to a colder segment is prevented there must be a thermal insulation material (I) between the segments (sketch 3a). A thermally conductive material (L) is built into this insulating material (I) so that the inevitably penetrated heat can be dissipated to the environment.
  • the digital heating plate consists of a sufficiently large number of segments of the type described. Temperature curves of any curve shape can be realized on this digital heating plate.
  • All segments can be controlled centrally. This is possible because each segment forms a completely self-contained unit. A temperature fault can be corrected immediately because the heating power of each segment represents a multiple of the nominal power.
  • connection between the heating element and the segment, or mass (M) is designed to be as loss-free as possible. The same applies to the connection to the sensor.
  • the target-actual deviation of each segment ( ⁇ 0.3 ° C) applies to the entire surface of the digital heating plate; the temperature reproducibility is accordingly high.
  • segment formation in the digital heating plate is that each individual segment can be regulated very quickly - due to its correspondingly much lower heat capacity. Derived from this, water cooling is completely eliminated.

Abstract

1. In a subdivided, quantized (digital) heating plate formed by multiple segments (S1 through Sn ), temperature regulated, separated by temperature sensors (W) in order to realize any desired temperature function in relation to time and space [delta(l, t)], its resolution being directly proportional to the number of said segments (S1 through Sn ), characterized by the fact that within a thermically insulating material (I) placed between said segments (S1 through Sn ) which impedes the heat flow between the segments, a thermoconductive material (L) is placed in order to dissipate the inevitably penetrated heat into the environnement.

Description

1)-Einleitung1 Introduction

Man braucht Geräte zur wärmetechnischen Untersuchung bei chemo-thermischen Reaktionen. Ziel ist es, auf einer beliebigen Fläche, eine beliebige Temperaturverteilung möglichst präzise zu erstellen.You need equipment for thermal analysis in chemo-thermal reactions. The aim is to create any temperature distribution as precisely as possible on any surface.

2) Stand der Technik2) State of the art

Dem Stand der Technik entsprechend gibt es Geräte mit Heizblöcken, die folgenden prinzipiellen Aufbau besitzen (Skizze 1):

  • Der rechteckige Heizblock (A) besitzt zwei Heizquellen (B1, B2) und zwei Wärmefühler (C1, C2) als Sensoren an den beiden äußeren Blockenden. Die Heizquellen erzeugen zwei unterschiedliche Temperaturen, um den über die Blocklänge angestrebten Temperaturverlauf zu erzielen.
According to the state of the art, there are devices with heating blocks that have the following basic structure (sketch 1):
  • The rectangular heating block (A) has two heating sources (B1, B2) and two heat sensors (C1, C2) as sensors at the two ends of the block. The heating sources generate two different temperatures in order to achieve the desired temperature profile over the block length.

Angestrebt ist bisher ein linearer Temperaturverlauf nach der Beziehung 24 = al + b. Hierbei gilt:

  • a = Änderungskonstante
  • 1 = Längsausdehnung des Heizblockes
  • b = niedrigster Wert des Temperaturverlaufes, der mindestens etwas oberhalb der Umgebungstemperatur liegen muß.
So far, a linear temperature curve according to the relationship 24 = al + b has been sought. The following applies:
  • a = change constant
  • 1 = longitudinal expansion of the heating block
  • b = lowest value of the temperature profile, which must be at least slightly above the ambient temperature.

Die Temperaturverteilung zwischen den beiden Heizquellen B1 und B2 beruht beim Blockprinzip allein auf der Wärmeleiteigenschaft des gewählten Materials. Sie verhindert die angestrebte Temperaturverteilung auch dann, wenn Kontrollstellen zusätzlich (C3, C4) in den Blockbereich zwischen den Heizquellen (B1, B2) verlegt werden. Selbst wenn zusätzliche Heizquellen (B3, B4) in den Blockbereich eingebaut werden, ist das Ergebnis unbefriedigend.With the block principle, the temperature distribution between the two heating sources B1 and B2 is based solely on the thermal conductivity of the selected material. It prevents the desired temperature distribution even if control points (C3, C4) are relocated to the block area between the heating sources (B1, B2). Even if additional heating sources (B3, B4) are installed in the block area, the result is unsatisfactory.

Die block- und materialbedingte Wärmeverteilung erfordert auch erheblichen Zeitbedarf, durchschnittlich 2 Stunden für z. B. △24 = 150° c.The block and material-related heat distribution also requires considerable time, on average 2 hours for z. B. △ 24 = 150 ° c.

Prinzipbedingt ergeben sich zusätzliche Nachteile:

  • - Die Abweichung vom Sollwert ist erheblich und für viele Anwendungen unzureichend, . B. 30%.
  • - Die Reproduzierbarkeit V (1, t) ist für die meisten Anwendungen ebenfalls unzureichend.
  • - Der bisher geschilderte Aufbau verhindert nicht, daß ungewollt Wärme (dem physikalischen Gesetz folgend) von heißeren zu kälteren Stellen abfließt, mit der Folge,daß die Verteilung noch mehr abweicht.
  • - Der Zeitbedarf zum Erreichen einer Sollverteilung ist,durch diesen Aufbau bedingt, überhaupt nicht beeinflußbar und variiert mit den Umgebungsbedingungen; jede wissenschaftliche Untersuchung bei chemo-thermischen Reaktionen hat somit, empirisch bedingt, einen hohen Unsicherheitsfaktor und Zeitbedarf.
  • - Die in Querrichtung benötigte Temperaturkonstanz ist beim Blockprinzip unzureichend; man hat versucht, mit Wasserkühlung das Längsverhalten gegen Schwankungen zu verbessern; dabei ist jedoch das Querverhalten des Temperaturverlaufs weiter verschlechtert worden.
Due to the principle, there are additional disadvantages:
  • - The deviation from the target value is considerable and inadequate for many applications. B. 30%.
  • - The reproducibility V (1, t) is also insufficient for most applications.
  • - The structure described so far does not prevent unwanted heat (according to the physical law) from flowing from hotter to colder places, with the result that the distribution deviates even more.
  • - Due to this structure, the time required to reach a target distribution cannot be influenced at all and varies with the ambient conditions; Every scientific investigation of chemo-thermal reactions therefore has, empirically, a high degree of uncertainty and time.
  • - The constant temperature required in the transverse direction is insufficient with the block principle; attempts have been made to improve the longitudinal behavior against fluctuations with water cooling; however, the transverse behavior of the temperature profile has deteriorated further.

3) Digitale Heizplatte3) Digital heating plate

Den Forderungen besser Rechnung tragend wird erfindungsgemäß hier eine digitale Heizplatte vorgeschlagen (Skizze 2).Taking the demands better into account, a digital heating plate is proposed here according to the invention (sketch 2).

Statt eines Blocks wird die Heizfläche in möglichst kleine Segmente (S1, S2, .... Sn) unterteilt. Jedes einzelne Segment (Skizze 3) besitzt eine Heizquelle (H) und einen Wärmefühler (W) als Sensor, die in einer Masse (M) angeordnet sind. Die Form eines Segments kann so gewählt werden, daß sie den geometrischen Anforderungen an beliebige Heizflächen gerecht wird. Skizze 2 zeigt eine beispielhafte Anordnung dieser Segmente zu einer beispielsweise rechteckigen Heizfläche.Instead of a block, the heating surface is divided into the smallest possible segments (S1, S2, .... Sn). Each individual segment (sketch 3) has a heat source (H) and a heat sensor (W) as a sensor, which are arranged in a mass (M). The shape of a segment can be chosen so that it meets the geometric requirements for any heating surface. Sketch 2 shows an exemplary arrangement of these segments to form a rectangular heating surface, for example.

Jedes Segment kann aufgrund seines Aufbaus eine definierte - von anderen Segmenten unabhängige - Solltemperatur annehmen. Da der Wärmefluß von einem wärmeren zu einem kälteren Segment unterbunden werden muß, befindet sich zwischen den Segmenten (Skizze 3a) ein thermisches Isoliermaterial (I). In dieses Isoliermaterial (I) ist ein thermisch leitendes Material (L) eingebaut, derart daß die unvermeidbar durchgedrungene Wärme an die Umgebung abgeführt werden kann.Due to its structure, each segment can assume a defined target temperature that is independent of other segments. Because the heat flow from a warmer to a colder segment is prevented there must be a thermal insulation material (I) between the segments (sketch 3a). A thermally conductive material (L) is built into this insulating material (I) so that the inevitably penetrated heat can be dissipated to the environment.

Die digitale Heiplatte besteht aus einer genügend großen Anzahl von Segmenten der beschriebenen Art. Auf dieser digitalen Heizplatte können Temperaturverläufe beliebigen Kurvenformen folgend realisiert werden.The digital heating plate consists of a sufficiently large number of segments of the type described. Temperature curves of any curve shape can be realized on this digital heating plate.

Ein spezielles Material (G) auf der Heizfläche erfüllt zwei Zwecke:

  • 1. zeitliche Schwankungen der Isttemperatur jedes einzelnen Segmentes werden stark reduziert (Skizze 4)
  • 2. über mehrere Segmente hinweg übt es eine integrierende Wirkung aus (Skizze 5).
A special material (G) on the heating surface serves two purposes:
  • 1. Temporal fluctuations in the actual temperature of each individual segment are greatly reduced (sketch 4)
  • 2. It has an integrating effect across several segments (sketch 5).

Alle Segmente könne zentral gesteuert werden. Dieses ist möglich, weil jedes Segment eine vollkommen in sich abgeschlossene Einheit bildet. Eine Temperaturstörung kann sofort ausgeregelt werden, weil die Heizleistung jedes Segmentes ein Vielfaches der Nennleistung darstellt.All segments can be controlled centrally. This is possible because each segment forms a completely self-contained unit. A temperature fault can be corrected immediately because the heating power of each segment represents a multiple of the nominal power.

Die Verbindung zwischen Heizelement und Segment, bzw. Masse (M), ist so verlustfrei wie möglich ausgelegt. Das Gleiche gilt für die Verbindung zum Sensor.The connection between the heating element and the segment, or mass (M), is designed to be as loss-free as possible. The same applies to the connection to the sensor.

Die Soll-Ist-Abweichung eines jeden Segmentes ( ± 0,3°C) gilt bei der digitalen Heizplatte für die gesamte Fläche; demgemäß hoch ist die Reproduzierbarkeit der Temperatur.The target-actual deviation of each segment (± 0.3 ° C) applies to the entire surface of the digital heating plate; the temperature reproducibility is accordingly high.

Die Segmentbildung bei der digitalen Heizplatte hat einen weiteren Vorteil zur Folge: der Zeitbedarf zum Erreichen des Sollwertes jeden Segmentes lässt sich z. B. auf drei Minuten bei △ 24= 150oC herabsetzen - auch hier ist dieser Wert für die gesamte Heizfläche gültig.The segment formation in the digital heating plate has a further advantage: the time required to reach the setpoint of each segment can, for. B. reduce to three minutes at △ 24 = 150 o C - this value is also valid for the entire heating surface.

Ein weiterer Vorteil der Segmentbildung bei der digitalen Heizplatte ist, daß jedes einzelne Segment sich sehr schnell regeln lässt - bedingt durch seine dementsprechend viel geringere Wärmekapazität. Hiervon abgeleitet entfällt eine Wasserkühlung vollständig.Another advantage of segment formation in the digital heating plate is that each individual segment can be regulated very quickly - due to its correspondingly much lower heat capacity. Derived from this, water cooling is completely eliminated.

Claims (6)

1. Digitale Heizplatte dadurch gekennzeichnet, daß eine Anzahl von Segmenten (S1 bis Sn) diese Heizplatte bilden und beliebig vorgebbare Temperaturverläufe von Ort und Zeit 24(1,t) mit einer Auflösung proportional zur Anzahl der Segmente (S1 bis Sn) realisiert werden können, wobei auch unter der Umgebungstemperatur liegen kann.1. Digital heating plate characterized in that a number of segments (S1 to Sn) form this heating plate and any predetermined temperature curves of place and time 24 (1, t) can be realized with a resolution proportional to the number of segments (S1 to Sn) , which can also be below the ambient temperature. 2. Digitale Heizplatte nach Anspruch 1 dadurch gekennzeichnet, daß die Segmente S1 bis Sn eine ebene Fläche bilden.2. Digital hotplate according to claim 1 characterized in that the segments S1 to Sn beta a flat surface form. 3. Digitale Heizplatte nach Ansprüchen 1 und 2 dadurch gekennzeichnet, daß eine Wärmeisolation (I) laut Skizze 3a sich zwischen den Segmenten Sl bis Sn befindet, um den Wärmefluß von einem Segment zum anderen zu behindern.3. Digital heating plate according to claims 1 and 2, characterized in that a thermal insulation (I) according to sketch 3a is between the segments Sl to Sn to hinder the flow of heat from one segment to another. 4. Digitale Heizplatte nach Ansprüchen 1, 2 und 3 dadurch gekennzeichnet, daß sich innerhalb der Wärmeisolation (I), u. U, auch allein oder mit Spaltbildung ein wärmeleitendes Material (L) befindet, um die unvermeidbar durchgedrungene Wärme an die Umgebung abzuführen.4. Digital heating plate according to claims 1, 2 and 3, characterized in that within the thermal insulation (I), u. U, a heat-conducting material (L), also alone or with gap formation, in order to dissipate the inevitably penetrated heat to the surroundings. 5. Digitale Heizplatte nach Ansprüchen 1 bis 4 dadurch gekennzeichnet, daß sich ein Material (G) über der durch die Segmente S1 bis Sn gebildeten Fläche befindet um: a) zeitliche Schwankungen der Isttemperatur jedes einzelnen Segmentes stark zu reduzieren (Skizze 4) und b) über mehrere Segmente hinweg eine integirierende Wirkung auszuüben (Skizze 5). 5. Digital heating plate according to claims 1 to 4, characterized in that there is a material (G) over the surface formed by the segments S1 to Sn to: a) greatly reduce temporal fluctuations in the actual temperature of each individual segment (sketch 4) and b) to have an integrating effect across several segments (sketch 5). 6. Digitale Heizplatte nach Ansprüchen 1 bis 5, jedoch abweichend von Anspruch 2 dadurch gekennzeichnet, daß sich aus den einzelnene Segmenten Sl bis Sn beliebig gekrümmte Flächen, z. B. Schalen, ebenso wie geschlossene Flächen, z. B. Zylinder, bilden lassen.6. Digital heating plate according to claims 1 to 5, but different from claim 2, characterized in that from the individual segments Sl to S n any curved surfaces, for. B. shells, as well as closed surfaces, for. B. cylinder.
EP19820102230 1982-03-18 1982-03-18 Quantized (digital) heating plate Expired EP0089383B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19820102230 EP0089383B1 (en) 1982-03-18 1982-03-18 Quantized (digital) heating plate
DE8282102230T DE3265723D1 (en) 1982-03-18 1982-03-18 Quantized (digital) heating plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19820102230 EP0089383B1 (en) 1982-03-18 1982-03-18 Quantized (digital) heating plate

Publications (2)

Publication Number Publication Date
EP0089383A1 true EP0089383A1 (en) 1983-09-28
EP0089383B1 EP0089383B1 (en) 1985-08-28

Family

ID=8188929

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820102230 Expired EP0089383B1 (en) 1982-03-18 1982-03-18 Quantized (digital) heating plate

Country Status (2)

Country Link
EP (1) EP0089383B1 (en)
DE (1) DE3265723D1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6437299B1 (en) * 1999-06-29 2002-08-20 Sumitomo Electric Industries, Ltd. Heating apparatus for splice protector with separate heating conductor patterns
US7611674B2 (en) 1999-10-01 2009-11-03 Applied Biosystems, Llc Device for the carrying out of chemical or biological reactions
US7727479B2 (en) 2000-09-29 2010-06-01 Applied Biosystems, Llc Device for the carrying out of chemical or biological reactions
EP1955771A3 (en) * 1996-11-08 2011-02-16 Eppendorf Ag Tempering block with tempering device
US8676383B2 (en) 2002-12-23 2014-03-18 Applied Biosystems, Llc Device for carrying out chemical or biological reactions
US10137452B2 (en) 2010-04-09 2018-11-27 Life Technologies Corporation Thermal uniformity for thermal cycler instrumentation using dynamic control
US10471431B2 (en) 2014-02-18 2019-11-12 Life Technologies Corporation Apparatuses, systems and methods for providing scalable thermal cyclers and isolating thermoelectric devices
US10835901B2 (en) 2013-09-16 2020-11-17 Life Technologies Corporation Apparatuses, systems and methods for providing thermocycler thermal uniformity

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH122021A (en) * 1926-09-30 1927-08-16 Schmid Vetter Emil Electric hotplate.
DE537125C (en) * 1931-10-30 Henry August Plieger Heating plate in which electrical resistors for heating the plate are installed in insulated channels that are closed at both ends
DE3010334A1 (en) * 1980-03-18 1981-09-24 Anni 4200 Oberhausen Dembski Electrically heated hot-plate with typically three elements - with each element comprising resistance wire in chamber in insulating baseplate, with top plates borne by support rods

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE537125C (en) * 1931-10-30 Henry August Plieger Heating plate in which electrical resistors for heating the plate are installed in insulated channels that are closed at both ends
CH122021A (en) * 1926-09-30 1927-08-16 Schmid Vetter Emil Electric hotplate.
DE3010334A1 (en) * 1980-03-18 1981-09-24 Anni 4200 Oberhausen Dembski Electrically heated hot-plate with typically three elements - with each element comprising resistance wire in chamber in insulating baseplate, with top plates borne by support rods

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1955771A3 (en) * 1996-11-08 2011-02-16 Eppendorf Ag Tempering block with tempering device
US6518551B2 (en) * 1999-06-29 2003-02-11 Sumitomo Electric Industries, Ltd. Apparatus and a method for heating a protective member for an optical fiber fusion splicing part
US6437299B1 (en) * 1999-06-29 2002-08-20 Sumitomo Electric Industries, Ltd. Heating apparatus for splice protector with separate heating conductor patterns
US8721972B2 (en) 1999-10-01 2014-05-13 Applied Biosystems, Llc Device for the carrying out of chemical or biological reactions
US7611674B2 (en) 1999-10-01 2009-11-03 Applied Biosystems, Llc Device for the carrying out of chemical or biological reactions
US8389288B2 (en) 1999-10-01 2013-03-05 Applied Biosystems, Llc Device for the carrying out of chemical or biological reactions
US9914125B2 (en) 1999-10-01 2018-03-13 Applied Biosystems, Llc Device for the carrying out of chemical or biological reactions
US7727479B2 (en) 2000-09-29 2010-06-01 Applied Biosystems, Llc Device for the carrying out of chemical or biological reactions
US9457351B2 (en) 2002-12-23 2016-10-04 Applied Biosystems, Llc Device for carrying out chemical or biological reactions
US8676383B2 (en) 2002-12-23 2014-03-18 Applied Biosystems, Llc Device for carrying out chemical or biological reactions
US10137452B2 (en) 2010-04-09 2018-11-27 Life Technologies Corporation Thermal uniformity for thermal cycler instrumentation using dynamic control
US10835901B2 (en) 2013-09-16 2020-11-17 Life Technologies Corporation Apparatuses, systems and methods for providing thermocycler thermal uniformity
US10471431B2 (en) 2014-02-18 2019-11-12 Life Technologies Corporation Apparatuses, systems and methods for providing scalable thermal cyclers and isolating thermoelectric devices

Also Published As

Publication number Publication date
EP0089383B1 (en) 1985-08-28
DE3265723D1 (en) 1985-10-03

Similar Documents

Publication Publication Date Title
DE2749251C3 (en) Adjustable heating device for small masses, especially the expansion means in heat setting devices
EP0089383A1 (en) Quantized (digital) heating plate
CH636945A5 (en) AIR CONDITIONING SYSTEM.
DE2721862B2 (en) Climatic chamber
DE4430648A1 (en) Recuperator control, suitable for heat recovery at constant temp., from flues or dryers; avoids
DD157983A3 (en) ARRANGEMENT FOR OPENING A NOISE CRUISE FOR CONTROLLING THE HEATING COOLING POWER OF A PELTIER BATTERY OF A THERMOSTAT
WO2001051209A1 (en) Laboratory temperature-regulating device comprising a temperature-controlled thermostatic block
EP0848311A1 (en) Actuating device
DE2613991B1 (en) THERMOSTATIC ACTUATOR FOR A HEATING VALVE
DE1043591B (en) Device for regulating the amount of cooling water
EP0034223A1 (en) Air duct for cooling semiconductor devices
DE4126227C2 (en) Controllable heat conduction system
DE934540C (en) Device for controlling the temperature of electrically heated vessels or the like.
DE908540C (en) Regulator with thermal return
DE19504931C2 (en) Device for cooling and dehumidifying indoor air
CH315153A (en) Liquid-filled spring thermostat with several heat sensors
EP0149428B1 (en) Device for determining the difference between two different and variable temperatures to control a controlling, regulating, measuring or recording process and utilisation of the device for a calorie measuring apparatus
DE1765797A1 (en) Electric storage heater
EP0061665B1 (en) Enclosed electric storage heater
DE941644C (en) Device for the automatic control of a room heated by a heating system
AT121820B (en) Temperature controller or meter with two temperature sensitive elements.
DE2752571A1 (en) ACTUATION DEVICE FOR THE ADJUSTMENT OF A MOVABLE ELEMENT, IN PARTICULAR THE CLOSURE OF A VALVE
DE1187695B (en) Ventilated rack insert for equipment of high frequency technology
AT399608B (en) Apparatus for controlling, in particular keeping constant, the surface temperature of a body
DE435213C (en) Electric heating plate

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19820319

AK Designated contracting states

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

ITF It: translation for a ep patent filed

Owner name: MARTINOTTI YOLANDA L.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

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

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

Ref country code: NL

Effective date: 19850828

Ref country code: FR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19850828

REF Corresponds to:

Ref document number: 3265723

Country of ref document: DE

Date of ref document: 19851003

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

EN Fr: translation not filed
26N No opposition filed
GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19881122

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: LI

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

Effective date: 19890331

Ref country code: CH

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

Effective date: 19890331

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

Ref country code: DE

Payment date: 19890927

Year of fee payment: 8

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

Ref country code: DE

Effective date: 19910101