EP0031514B1 - Elektrischer Strahlheizkörper sowie Verfahren und Vorrichtung zu seiner Herstellung - Google Patents

Elektrischer Strahlheizkörper sowie Verfahren und Vorrichtung zu seiner Herstellung Download PDF

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Publication number
EP0031514B1
EP0031514B1 EP80107754A EP80107754A EP0031514B1 EP 0031514 B1 EP0031514 B1 EP 0031514B1 EP 80107754 A EP80107754 A EP 80107754A EP 80107754 A EP80107754 A EP 80107754A EP 0031514 B1 EP0031514 B1 EP 0031514B1
Authority
EP
European Patent Office
Prior art keywords
support
slot
heater
heating
coils
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP80107754A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0031514A1 (de
Inventor
Gerhard Gössler
Eugen Wilde
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.)
EGO Elektro Geratebau GmbH
Original Assignee
EGO Elektro Gerate Blanc und Fischer GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6088449&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0031514(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by EGO Elektro Gerate Blanc und Fischer GmbH filed Critical EGO Elektro Gerate Blanc und Fischer GmbH
Priority to AT80107754T priority Critical patent/ATE13793T1/de
Publication of EP0031514A1 publication Critical patent/EP0031514A1/de
Application granted granted Critical
Publication of EP0031514B1 publication Critical patent/EP0031514B1/de
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
    • H05B3/748—Resistive heating elements, i.e. heating elements exposed to the air, e.g. coil wire heater
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/017—Manufacturing methods or apparatus for heaters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49082—Resistor making
    • Y10T29/49083—Heater type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
    • Y10T29/4913—Assembling to base an electrical component, e.g., capacitor, etc.
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
    • Y10T29/4913—Assembling to base an electrical component, e.g., capacitor, etc.
    • Y10T29/49133—Assembling to base an electrical component, e.g., capacitor, etc. with component orienting
    • Y10T29/49135—Assembling to base an electrical component, e.g., capacitor, etc. with component orienting and shaping, e.g., cutting or bending, etc.
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
    • Y10T29/49147—Assembling terminal to base
    • Y10T29/49151—Assembling terminal to base by deforming or shaping
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49915—Overedge assembling of seated part
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49938—Radially expanding part in cavity, aperture, or hollow body

Definitions

  • the invention relates to a process for the production of electric radiant heaters, in particular for glass ceramic hotplates, with a carrier body made of an electrically and heat-insulating material with grooves, in which helical heating resistors are partially embedded, parts of the groove side wall engaging between the heating resistor turns and wherein the effective groove depth is at most approximately as large as the dimensions of the heating resistor windings in the direction of the groove depth, as well as a device for this and the radiant heater thus produced.
  • a radiant heater of the type mentioned is known from BE-A-464 026.
  • the insertion takes place there so that the heating resistors protrude over the groove with more than half of their circumference.
  • An indentation in the groove side walls can therefore only fix the heating coils in the longitudinal direction, while they are not secured against falling out upwards.
  • DE-A-2 729 930 and 2 820 114 describe fixing heating coils by pressing heating coil areas into rib-like projections, but the remaining part of the heating coils lies largely freely on the surface of the insulating support. This definition, which is tried and tested per se, requires high-quality insulation materials and certain manufacturing processes for the correct determination.
  • tubular heating elements which are thermally conductively connected to this by partial deformation of a metal plate.
  • tubular heaters there are other requirements that cannot be compared with the definition of free heating resistance coils.
  • the heat from the tubular heating element is to be given off to the metal material surrounding it, while in the case of radiant heating elements a heat transfer to the surrounding insulating material is to be avoided.
  • the tubular heating elements are also fixed there by enclosing the smooth tubular heating element jacket.
  • the object of the invention is therefore to propose a radiant heater and method and device for its manufacture, with which a secure determination of the heating resistors with little work and without additional aids such as putty, cement or the like. is possible.
  • the helical heating resistors are introduced into the grooves to such an extent that the side regions of the heating resistor windings with the largest dimensions in the direction of the groove width lie within the groove, and that at least parts of the groove side wall and lateral sections of the windings of the Heating resistors are moved relatively laterally towards one another until parts of the groove side wall overlap the side regions of the heating resistor turns in the direction of the slot opening and engage between the heating resistor turns.
  • the heating coils when the heating coils are inserted into suitable grooves, to deform the heating coils, for example from a circular into an oval cross section, by pressing from above, the narrow sides of the oval being formed being pressed into the groove side walls. It is also possible, after inserting the heating coils into suitable grooves, the webs provided between the grooves, i. H. in the area of the groove side walls a little above the coils, so that a section overlapping the heating coils is created. Here too, the heating coils can be pressed into the groove side wall.
  • the pressing can be carried out both in the fully cured state of the carrier body, which consists of an insulating ceramic or fibrous material.
  • the carrier body which consists of an insulating ceramic or fibrous material.
  • the heating coils can be pressed in with very little resistance, so that the method can also be used for the thinnest heating coils.
  • Fig. 1 shows a radiant heater 11 which is arranged below a glass ceramic plate 12 which forms the cooking surface of a cooking appliance.
  • the radiant heater 11 is supported by springs 14 on a support structure 13, which may consist, for example, of a sheet metal recess. It is used to heat cooking vessels placed on the glass ceramic plate 12 by means of radiation, which can partially penetrate the glass ceramic plate and heat it on the other hand.
  • the radiant heater 11 consists of a normally circular flat carrier shell 15 made of sheet metal, in which a carrier body 16 made of an electrically and thermally insulating material is introduced. It can be made from a ceramic or from an insulating material consisting of inorganic fibers.
  • the carrier body 16 also has the shape of a flat circular shell with an essentially flat bottom 18 and a raised edge 17 which is pressed against the underside of the glass ceramic plate 12 under the action of the springs 14.
  • the carrier body 16 has spirally arranged grooves 19 in which electrical heating resistors in the form of heating coils 20 are located. Their arrangement and fastening in the grooves can be seen more clearly from the following drawing figures.
  • the heating resistors are connected to a domestic electrical network via a switch or controller.
  • Fig. 2 shows in detail the arrangement of the heating coils 20 in the grooves.
  • a heating coil with a circular coil cross section is introduced into a groove whose width corresponds to the outside diameter of the coil, while the depth is less than the coil diameter.
  • FIG. 2 shows the carrier body 16c after the heating coils 20 have been inserted, but before their final fixing.
  • the heating coils are inserted into a groove 19c, the width of which corresponds to the outside diameter of the heating coils 20, which have a circular cross-section when inserted, and the depth of which lies between half and full coil diameters.
  • the heating coils are acted on with a tool 24, which has the shape of a plate with downwardly projecting, in the exemplary embodiment triangularly shaped ribs 25 which extend in the longitudinal direction centrally over the grooves 19c.
  • the heating coils are given a shape which corresponds to a lying, rounded B, the outer coil section 26 of the deformed heating coils 20c lying on the open groove side having an indentation.
  • the overall shape of the coil is widened, so that it digs into the side walls 21 of the groove 19c and forms indentations 23c there, which ensure the heating coils are fixed both in the longitudinal direction of the groove and upwards.
  • ribs of any basic shape can be used, so that the most favorable helical shapes in terms of the definition and the radiation properties can be produced, for example also a flat oval.
  • the inflection in section 26, however, has the advantage that a larger section of the heating coils lies on the upper side directly facing the glass ceramic plate.
  • a carrier body 16d is also shown in FIG. 4 before its completion.
  • the grooves 19d correspond to those according to FIG. 4, however the carrier body 16d in FIG. 1 is formed from the ceramic or fiber-like mass, but has not yet been dried or fired, as a result of which it gets its final hardness.
  • the Schuetzin 20 are suitable, but without indentations in the grooves 19d.
  • FIG. 5 shows the same carrier body 16d after drying or firing.
  • a shrinkage occurs in the material of the carrier body, i. H. the carrier body shrinks.
  • 4 also reduces the dimensions of grooves 19d according to FIG. 4 to those of groove 19d 'according to FIG. 5.
  • the heating coils which are not influenced in terms of their mass by the hardening, therefore press into the side walls 21d of the grooves and form indentations 23d there, which have the same effect as in FIG. 3.
  • slight deformations of the heating coils can occur as a result of the lateral indentation. which, however, can be prevented by an appropriate support when pressing in.
  • FIG. 6 also shows a production stage of a carrier body 16e, in which the grooves 19e are substantially wider than they are deep, so that heating coils 20e with a largely suitable therein flat oval spiral cross section could be inserted.
  • these webs 29 are acted on using a tool 27 which has triangular projections 28 on its underside, but which are arranged centrally above the webs 29, so that they press apart in the manner of a rivet head 30 (FIG. 7 ) and thus determine the heating coils 20e which remain essentially unchanged in shape.
  • the rivet head-like deformations 30 provide particularly good protection against the heating coils 20e falling out.
  • the deformation between FIGS. 6 and 7 can follow in the already hardened or also wet state, the shrinkage (method according to FIGS. 4 and 5) helping to determine the latter in the latter case.
  • the fixing methods according to the individual described embodiments are particularly advantageous in their combination, especially when it comes to fixing very thin wires, which are also particularly critical with regard to creep.
  • the fixing can be carried out with fewer fuses; in this case, for example, the partitions between the grooves can also be partially omitted or only partially present. This improves the heat transfer conditions.
  • the depth of the indentations of the heating coils in the walls of the groove consisting of the side and bottom walls depend on the winding diameter of the wire load and the specific load on the heated surface and the wire thickness.
  • the heating coils are also protected against falling over. This could occur if the wire forming the heating coils loses so much strength at high temperatures that the individual turns of the coils collide laterally, unless they are supported.
  • the type of shaped body will also have to be taken into account.
  • a relatively soft molded body made of fibrous material is preferred, while in the embodiment according to FIGS. 4 and 5 a ceramic material that is hard after firing is primarily suitable.
  • the heating coils can also be introduced into the carrier body, which has been pre-dried or pre-hardened but not yet fully hardened.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Resistance Heating (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Electric Ovens (AREA)
  • Surface Heating Bodies (AREA)
  • Cookers (AREA)
  • Constitution Of High-Frequency Heating (AREA)
EP80107754A 1979-12-14 1980-12-09 Elektrischer Strahlheizkörper sowie Verfahren und Vorrichtung zu seiner Herstellung Expired EP0031514B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80107754T ATE13793T1 (de) 1979-12-14 1980-12-09 Elektrischer strahlheizkoerper sowie verfahren und vorrichtung zu seiner herstellung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792950302 DE2950302A1 (de) 1979-12-14 1979-12-14 Elektrischer strahlheizkoerper sowie verfahren und vorrichtung zu seiner herstellung
DE2950302 1979-12-14

Publications (2)

Publication Number Publication Date
EP0031514A1 EP0031514A1 (de) 1981-07-08
EP0031514B1 true EP0031514B1 (de) 1985-06-12

Family

ID=6088449

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80107754A Expired EP0031514B1 (de) 1979-12-14 1980-12-09 Elektrischer Strahlheizkörper sowie Verfahren und Vorrichtung zu seiner Herstellung

Country Status (10)

Country Link
US (1) US4380116A (es)
EP (1) EP0031514B1 (es)
JP (1) JPS5693283A (es)
AT (1) ATE13793T1 (es)
AU (1) AU539828B2 (es)
DE (2) DE2950302A1 (es)
ES (2) ES254990Y (es)
GR (1) GR71640B (es)
YU (1) YU39453B (es)
ZA (1) ZA807784B (es)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4531047A (en) * 1982-07-28 1985-07-23 Casso-Solar Corporation Clip-mounted quartz tube electric heater
DE3233181C2 (de) * 1982-09-07 1985-08-01 Bulten-Kanthal GmbH, 6082 Mörfelden-Walldorf Aus keramischen Fasern vakuumgeformte, elektrische, freistrahlende Widerstands-Heizvorrichtung für Industrieöfen und Verfahren zu deren Herstellung.
DE3502497A1 (de) * 1985-01-25 1986-07-31 Grünzweig + Hartmann und Glasfaser AG, 6700 Ludwigshafen Heizvorrichtung, insbesondere fuer eine strahlungsbeheizte kochplatte, sowie verfahren zu ihrer herstellung
DE3527413A1 (de) * 1985-07-31 1987-02-12 Ego Elektro Blanc & Fischer Elektrischer strahlheizkoerper zur beheizung von heizflaechen sowie verfahren und vorrichtung zu seiner herstellung
DE3527958C2 (de) * 1985-08-03 1994-01-20 Licentia Gmbh Back- und Bratrohr
DE3527957C2 (de) * 1985-08-03 1996-06-20 Aeg Hausgeraete Gmbh Backofenmuffel aus Glas oder Glaskeramik
DE3539881A1 (de) * 1985-11-11 1987-05-14 Ego Elektro Blanc & Fischer Elektrischer strahlheizkoerper zur beheizung von heizflaechen sowie verfahren und vorrichtung zu seiner herstellung
DE3602541A1 (de) * 1986-01-29 1987-07-30 Rommelsbacher & Co Elektrowaer Heizwendeltraeger, damit versehene kochplatte und verfahren zu seiner herstellung
DE3613902A1 (de) * 1986-04-24 1987-10-29 Ego Elektro Blanc & Fischer Kochplatte, insbesondere fuer grosskuechen-herde
EP0234373A3 (de) * 1986-02-26 1988-03-02 E.G.O. Elektro-Geräte Blanc u. Fischer Kocheinheit mit Strahlheizkörper
DE3606117A1 (de) * 1986-02-26 1987-08-27 Ego Elektro Blanc & Fischer Kocheinheit mit strahlheizkoerper
JPH0398285A (ja) * 1989-09-08 1991-04-23 Kanazawa Kikai Kinzoku Danchi Kyodo Kumiai 加熱装置
US5401188A (en) * 1993-10-12 1995-03-28 Itt Corporation Boardlock clip
DE19527826C2 (de) * 1995-07-29 2002-05-08 Ego Elektro Geraetebau Gmbh Strahlungs-Kochstelleneinheit
DE102007053349A1 (de) * 2007-10-30 2009-05-07 E.G.O. Elektro-Gerätebau GmbH Träger für eine elektrische Heizeinrichtung, elektrische Heizeinrichtung und Verfahren zur Herstellung einer elektrischen Heizeinrichtung
DE102007053348A1 (de) * 2007-10-30 2009-05-07 E.G.O. Elektro-Gerätebau GmbH Träger für eine elektrische Heizeinrichtung und elektrische Heizeinrichtung sowie Herstellungsverfahren
JP2010186970A (ja) * 2009-02-13 2010-08-26 Nippon Dennetsu Co Ltd 熱板、加熱冷却装置及び熱板の製造方法
WO2016121018A1 (ja) * 2015-01-28 2016-08-04 Smc株式会社 フローティングジョイントの製造方法、及びその方法により製造されたフローティングジョイント

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE464026A (es) *
US3221396A (en) * 1960-07-15 1965-12-07 Gen Motors Corp Method of forming a solid plate cooking unit
FR2123536A1 (es) * 1971-01-29 1972-09-08 Smiths Industries Ltd
DE2729930A1 (de) * 1977-07-02 1979-01-11 Karl Fischer Strahlungs-heizeinheit fuer glaskeramik-elektrokochgeraete
DE2820114A1 (de) * 1978-05-09 1979-11-15 Karl Fischer Strahlungs-heizeinheit insbesondere fuer glaskeramik-elektrokochgeraete

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
DE1127512B (de) * 1959-07-22 1962-04-12 Gustav Rommelsbacher Mit Rillen versehene elektrisch beheizte keramische Kochplatte mit in der keramischen Masse eingebetteter Heizwendel
US3303324A (en) * 1964-08-21 1967-02-07 Appleman Leon Heating unit
US3436816A (en) * 1965-10-22 1969-04-08 Jerome H Lemelson Method of making heat transfer panelling
DE2042427A1 (de) * 1970-08-27 1972-03-02 Fischer K Elektrischer Heizkörper zur Be heizung einer isolierenden Platte
DE2202499C3 (de) * 1971-01-21 1975-07-17 Cornelis Hendrik Van Haarlemmermeer Toorn (Niederlande) Heizvorrichtung
GB1433478A (en) * 1972-08-05 1976-04-28 Mcwilliams J A Electrical heating apparatus
US4106179A (en) * 1973-07-16 1978-08-15 Richard Bleckmann Method of cold-joining metal parts
DE2500586A1 (de) * 1975-01-09 1976-07-15 Ego Elektro Blanc & Fischer Elektrokochgeraet
US4045653A (en) * 1976-06-28 1977-08-30 National Presto Industries, Inc. Electric cooker with press-staked heating element and method of making the same
SE7806238L (sv) * 1977-07-02 1979-01-03 Fischer Karl Elektriskt stralningsvermeelement, serskilt for glaskeramikkokhell
DE2812247B2 (de) * 1978-03-21 1981-06-19 Ako-Werke Gmbh & Co., 7988 Wangen Elektrische Kochplatte

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE464026A (es) *
US3221396A (en) * 1960-07-15 1965-12-07 Gen Motors Corp Method of forming a solid plate cooking unit
FR2123536A1 (es) * 1971-01-29 1972-09-08 Smiths Industries Ltd
DE2729930A1 (de) * 1977-07-02 1979-01-11 Karl Fischer Strahlungs-heizeinheit fuer glaskeramik-elektrokochgeraete
DE2820114A1 (de) * 1978-05-09 1979-11-15 Karl Fischer Strahlungs-heizeinheit insbesondere fuer glaskeramik-elektrokochgeraete

Also Published As

Publication number Publication date
GR71640B (es) 1983-06-20
ES254990Y (es) 1982-05-01
YU39453B (en) 1984-12-31
ZA807784B (en) 1981-12-30
JPH0328031B2 (es) 1991-04-17
YU314580A (en) 1983-02-28
AU6540080A (en) 1981-06-18
ATE13793T1 (de) 1985-06-15
ES8202666A1 (es) 1982-02-01
EP0031514A1 (de) 1981-07-08
ES497675A0 (es) 1982-02-01
JPS5693283A (en) 1981-07-28
DE3070761D1 (en) 1985-07-18
DE2950302A1 (de) 1981-06-19
AU539828B2 (en) 1984-10-18
ES254990U (es) 1981-09-01
US4380116A (en) 1983-04-19

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