US3627986A - Electric smooth top range - Google Patents

Electric smooth top range Download PDF

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Publication number
US3627986A
US3627986A US863926A US3627986DA US3627986A US 3627986 A US3627986 A US 3627986A US 863926 A US863926 A US 863926A US 3627986D A US3627986D A US 3627986DA US 3627986 A US3627986 A US 3627986A
Authority
US
United States
Prior art keywords
glass
enclosure
cooling air
electric
recessed part
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US863926A
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English (en)
Inventor
Carl L Anderson
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.)
White Consolidated Industries Inc
Original Assignee
Tappan Co
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 Tappan Co filed Critical Tappan Co
Application granted granted Critical
Publication of US3627986A publication Critical patent/US3627986A/en
Assigned to WHITE CONSOLIDATED INDUSTRIES, INC. reassignment WHITE CONSOLIDATED INDUSTRIES, INC. MERGER (SEE DOCUMENT FOR DETAILS). EFFECTIVE DATE: DECEMBER 31, 1986 Assignors: TAPPAN COMPANY, THE,
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H05B3/72—Plates of sheet metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/10—Tops, e.g. hot plates; Rings
    • F24C15/101—Tops, e.g. hot plates; Rings provisions for circulation of air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/10—Tops, e.g. hot plates; Rings
    • F24C15/102—Tops, e.g. hot plates; Rings electrically heated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/06—Arrangement or mounting of electric heating elements
    • F24C7/067—Arrangement or mounting of electric heating elements on ranges
    • 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
    • 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

Definitions

  • Each heating device with several beneath a common glass-ceramic plate, includes a coiled resistance wire in a groove in an end face ofa body of high-temperature insulation having a peripheral band at such end which projects above the groove area and sealingly engages the underside of the plate.
  • the devices are in a rough-in box on elevated supports and a blower circulates ambient air over the same for cooling.
  • the heating elements are designed and arranged to provide discrete localized sources of energy beneath the top plate, which readily transmits radiant energy with little diffusion laterally through the material, and the coupling of the elements to the plate has been a primary concern in developing a unit which will be both efficient in delivering the energy needed for cooking in the accustomed manner and will reliably withstand the high-temperature conditions which are needed over the expected long periods of use.
  • a primary object of the present invention to provide an assembly of an electric heating element and glass top distinguished by an improved coupling of the two for the development of the energy at the top surface for cooking.
  • Another object is to provide such an assembly in which there is relatively rapid heating of the element to incandescence and concentration of the energy beneath the top surface cooking area.
  • a further object is to provide such a range including a circulating air system for positive cooling of the unit and particularly the bottom of the same.
  • FIG. 1 is a top plan view of a smooth top range in accordance with the present invention, with the top cooling surface removed to fully expose the electric heating elements therebeneath;
  • FIG. 2 is a vertical sectional view of a portion of the range at the line 2-2 in FIG. 1;
  • FIG. 3 is another vertical section as viewed from the plane ofthe line 3-3 in FIG. 2;
  • FIG. 4 is a still further vertical section of another portion of the range at the plane of the line 4-4 in FIG. 1.
  • the illustrated embodiment of the new range is in the form of a counter top unit or one that is suspended in an-opening provided in a kitchen counter or the equivalent.
  • the range comprises a metal rough-in box 11 and, about its open top, a finish ring 12 which overlies the counter about the opening.
  • the interior of the box is divided unequally by a major vertical partition 13 which extends from the front wall to the rear wall of the box, and the section to the right thereof as viewed from the front is subdivided, by two further partitions l4 and 15 which extend to the adjacent box sidewall, into forward, central, and rear compartments.
  • the front or forward compartment at the right of the range is closed by a decorative top plate 16 in which four controls 17 are mounted, with these being basically on-off switches, and below the same there is a horizontal baffle 18.
  • the front box wall below such bafile is provided with louvers l9 and an electric motor 20 is mounted in this space on the partition 14 to drive a transverse blower 21 which is shown spanning the central compartment.
  • the major partition 13 is provided with an opening coincident with the discharge 22 of the blower, and a horizontally slotted cover 23 is applied over the tops of both the central and rear compartments.
  • the partition section which forms a wall of the latter is provided with a screen 24 for airflow in a manner which will be more fully described below.
  • the main section of the box, to the left of the partition 13, contains four electric heating units designated generally as 25, 26', 27, and 28, arranged in front and rear pairs.
  • the units 25 and 27 are shown as being of smaller size than the other two to provide two different wattages in each pair, and it will be understood that these units are adapted to be connected to an available energy source respectively through the controls 17 for on-off regulation in the simplest version of the range and without need to include the wiring therefor in the drawings.
  • each unit is the same in detail and comprises a cylindrical body 29 made of a high-temperature insulation material and having at its upper face a circular depressed portion 30 in which a spiral groove 31 is formed.
  • a bare coiled resistance wire 32 is extended along the groove with its inner and outer ends, not shown, brought downwardly or through the wall of the body 29 for connection in the energization circuit, and the groove can be shaped if desired to provide a snapping in and positive retention of the element, for example, by protrusions reducing the top width at intervals along the groove length.
  • Each coil-insulation body assembly is contained by a metal cylindrical pan 37 open at the top and having a relatively short inturned flange 38 at the bottom.
  • the top edge of the pan is below the upper end of the body as illustrated, so as not to interfere with the engagement of the latter and the top plate 34 or contact such plate.
  • Each pan is supported on a base 39 which is in the form of a circular ring having angular feet 40, and these feet are fastened to upstanding loops 41 secured in registry to the bottom of the rough-in box.
  • blower 21 is operative to create a flow of ambient air to the cooking section of the unit, and the flow is directed in particular manner by a vertical baffle 42 which extends from partition 13 at the rear end of the blower discharge toward the opposite end wall of the box between the front and rear pairs of the heating units, but terminating approximately at the center line of the left-hand units as shown.
  • This baffle extends from the bottom of the box substantially fully to the top glass-ceramic plate, and the airflow from the blower must proceed through the box in the manner indicated by the arrows, whereby it is first confined to traverse the forward portion of the element area and then flows reversely through the rear portion and through screen 24 for exhaust upwardly through the rear compartment and top grill or cover 23.
  • a range of the construction shown and described has been constructed with a top plate of translucent Hercuvit supplied by PPG lndustries, with resistance elements of L200 and l,800 watts respectively. These elements were made of "Kanthal wire supplied by the Kanthal Corporation of Bethel, Connecticut, and the element insulation formed of Cerafelt," which is a felted and bonded refractory fibrous body supplied by Johns- Manville Corporation.
  • the temperature of the bottom of the box does not exceed approximately 140 F., the maximum exhaust temperature will be about l25 F., and l liter of water will boil (150 F.) in about minutes or only about percent slower than what is normally obtained with exposed surface elements. 1
  • top plate glass-ceramics
  • Pyro-Ceram glass supplied by Coming Glass Works
  • high-temperature insulation might be employed.
  • the blower which may also vary as to specific form, should be connected to be operative whenever any element is energized, and may desirably be programmed to run, for example, by an appropriate temperature response, for an interval after deenergization to accelerate cooling.
  • the temperature of the Hercuvit top cannot exceed roughly about 1,300 F.
  • the element temperature will be as high as 2,00 F so that the aforementioned difference between these two temperatures and the advantage of having a noncontacting relation of the two will be better appreciated.
  • the open coil disclosed of course provides a quicker response to energization and deenergization, as compared for example to a sheathed element, and the exposure to the glass is considered significant, It has been found that a fully imbedded coil has a tendency to burn out, but with the open coil the temperature at the bottoms of the turns which are relatively enclosed usually will not be more than about 20 hotter than the tops, and this is a tolerable variation which will not adversely affect the operation of the element. While an open coil is thus used exposed and out of contact with the glass, it is obvious that the peripheral sealing of each element and the mass of the insulation away from the glass provide extremely good concentration of the energy.
  • a smooth top electric cooker comprising enclosure means having a substantially flat top of high-temperature glass, an electric heater device within the enclosure means, said device including a body of high-temperature insulating material the top of which is formed to provide a relatively recessed part and a relatively projecting continuous peripheral part enclosing such recessed part, electric resistance means supported in the recessed part of said body out of contact with the glass top for heating through the latter, mounting means for holding the body of insulation material spaced above the bottom of the enclosure means, with limited heat conductive connection thereto, and with the projecting peripheral part of the body firmly against the underside of the glass top, thereby to enclose the heating means cooperably with the glass top, and means for circulating cooling air through the enclosure means fully about the body of insulation material, said lastnamed means including blower means operatively connected to the enclosure means to produce the aforesaid circulation of cooling air through the same.
  • a smooth top electric cooker as set forth in claim I wherein at least one additional heater device with a glass top is provided of the same form and mounting as the first, and the same blower means circulates cooling air similarly over such additional device.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Electric Stoves And Ranges (AREA)
  • Resistance Heating (AREA)
US863926A 1969-10-06 1969-10-06 Electric smooth top range Expired - Lifetime US3627986A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US86392669A 1969-10-06 1969-10-06

Publications (1)

Publication Number Publication Date
US3627986A true US3627986A (en) 1971-12-14

Family

ID=25342129

Family Applications (1)

Application Number Title Priority Date Filing Date
US863926A Expired - Lifetime US3627986A (en) 1969-10-06 1969-10-06 Electric smooth top range

Country Status (8)

Country Link
US (1) US3627986A (cs)
AU (1) AU1491370A (cs)
BE (1) BE752099A (cs)
CA (1) CA922767A (cs)
DE (1) DE2043631A1 (cs)
FR (1) FR2065811A5 (cs)
GB (1) GB1289016A (cs)
NL (1) NL7011618A (cs)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3797375A (en) * 1972-03-16 1974-03-19 Jenn Air Corp Stove with selectively interchangeable cooking apparatus
US3819903A (en) * 1973-06-28 1974-06-25 Whirlpool Co Ceramic cooktop with a spiralled heating coil element assembly
US3838505A (en) * 1973-11-02 1974-10-01 Whirlpool Co Method of forming glass-ceramic cooktop construction
FR2229929A1 (cs) * 1973-05-18 1974-12-13 Jenn Air Corp
US3859499A (en) * 1974-06-12 1975-01-07 Gen Motors Corp Airflow cooling system for heat-cleaning ranges
US3866018A (en) * 1974-04-01 1975-02-11 Gen Electric Molded plastic cooktop with heated glass-ceramic plate insert
US3870862A (en) * 1973-11-02 1975-03-11 Whirlpool Co Glass-ceramic cooktop construction
US3912905A (en) * 1974-02-25 1975-10-14 Kanthal Corp Electric resistance heating device
US4415788A (en) * 1981-06-08 1983-11-15 Jenn-Air Corporation Induction cartridge
US5019682A (en) * 1988-08-29 1991-05-28 Samsung Electronics Co., Ltd. Separable electrical cooker
US5432320A (en) * 1992-10-20 1995-07-11 Schott Glaswerke Cooking range
US5834739A (en) * 1996-11-05 1998-11-10 Barnstead/Thermolyne Corporation Stirring hot plate
US6274849B1 (en) * 1999-01-22 2001-08-14 Ceramaspeed Limited Radiant electric heater
US6297482B1 (en) 2000-07-26 2001-10-02 Maytag Corporation Ceramic-based downdraft cooktop having angled front face portion
US6339212B1 (en) * 2000-09-26 2002-01-15 General Electric Company Cooking appliance having controls cooled by natural convection and method of cooling the same
US6410892B1 (en) * 2001-06-19 2002-06-25 Bsh Home Appliances Corporation Cooktop having a flat glass ceramic cooking surface
US6444958B1 (en) * 2000-09-26 2002-09-03 General Electric Company Cooking appliance and method of cooling the same
US6501053B2 (en) 2000-07-26 2002-12-31 Maytag Corporation Control system for an appliance cooktop
US20050269311A1 (en) * 2004-06-04 2005-12-08 Maytag Corporation Ventilation system for a cooking appliance
EP1790911A1 (en) * 2005-11-25 2007-05-30 LG Electronics, Inc. Cook-top and cooking system with cooling system
US20100089378A1 (en) * 2008-10-13 2010-04-15 Babington Robert S Mobile Kitchen
US20100307476A1 (en) * 2007-12-05 2010-12-09 Kwon Jung-Ju Cooking appliance

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2165569C3 (de) * 1971-12-30 1986-05-28 E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen Elektrokochgerät mit einer oberen Platte aus hochwärmebeständigem glasartigem bzw. keramischem Material
DE2806794C2 (de) * 1978-02-17 1984-10-25 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Kochherd
JPS57109291A (en) * 1980-12-26 1982-07-07 Matsushita Electric Ind Co Ltd Induction heating cooking device
GB2132060B (en) * 1982-12-24 1985-12-18 Thorn Emi Domestic Appliances Heating apparatus
GB2144956A (en) * 1982-12-24 1985-03-13 Thorn Emi Domestic Appliances Heating apparatus
JPS61105036A (ja) * 1984-10-29 1986-05-23 Matsushita Electric Ind Co Ltd 調理器ユニツト
DE3723077A1 (de) * 1987-07-11 1989-01-19 Bauknecht Hausgeraete Strahlheizkoerper fuer kochgeraete
DE10259744B4 (de) * 2002-12-19 2020-10-01 BSH Hausgeräte GmbH Montagerahmen für ein Kochfeld sowie Verfahren zur Herstellung eines Montagerahmens
DE102007021939A1 (de) * 2007-05-10 2008-11-13 BSH Bosch und Siemens Hausgeräte GmbH Kochfeld

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2179934A (en) * 1936-09-14 1939-11-14 Richard N Wilson Electric heating unit
US2446666A (en) * 1946-08-07 1948-08-10 Ernest Gregory Electric cooking heater
US2565256A (en) * 1949-04-04 1951-08-21 James D Myers Heated mirror
US2870316A (en) * 1956-05-18 1959-01-20 Philco Corp Heaters
US2913565A (en) * 1955-12-30 1959-11-17 Kanthal Ab Electrically heated apparatus
US3244859A (en) * 1963-01-07 1966-04-05 Poly Pak Corp Of America Infrared food heater
CH430984A (de) * 1965-04-05 1967-02-28 Licentia Gmbh Aus Kunststoff bestehende Tragplatte
US3331941A (en) * 1963-12-26 1967-07-18 Monsanto Co Infrared heater
US3335261A (en) * 1965-10-12 1967-08-08 Gen Motors Corp Electric hot plate
US3384067A (en) * 1966-07-25 1968-05-21 Norris Thermador Corp Forced air cooling and ventilating system for self-cleaning oven
US3471680A (en) * 1967-09-13 1969-10-07 Corning Glass Works Electrical radiant heating unit
US3479490A (en) * 1969-02-06 1969-11-18 Norman H Stark High temperature infrared radiant heating device
US3496336A (en) * 1967-10-25 1970-02-17 Texas Instruments Inc Electric heater

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2179934A (en) * 1936-09-14 1939-11-14 Richard N Wilson Electric heating unit
US2446666A (en) * 1946-08-07 1948-08-10 Ernest Gregory Electric cooking heater
US2565256A (en) * 1949-04-04 1951-08-21 James D Myers Heated mirror
US2913565A (en) * 1955-12-30 1959-11-17 Kanthal Ab Electrically heated apparatus
US2870316A (en) * 1956-05-18 1959-01-20 Philco Corp Heaters
US3244859A (en) * 1963-01-07 1966-04-05 Poly Pak Corp Of America Infrared food heater
US3331941A (en) * 1963-12-26 1967-07-18 Monsanto Co Infrared heater
CH430984A (de) * 1965-04-05 1967-02-28 Licentia Gmbh Aus Kunststoff bestehende Tragplatte
US3335261A (en) * 1965-10-12 1967-08-08 Gen Motors Corp Electric hot plate
US3384067A (en) * 1966-07-25 1968-05-21 Norris Thermador Corp Forced air cooling and ventilating system for self-cleaning oven
US3471680A (en) * 1967-09-13 1969-10-07 Corning Glass Works Electrical radiant heating unit
US3496336A (en) * 1967-10-25 1970-02-17 Texas Instruments Inc Electric heater
US3479490A (en) * 1969-02-06 1969-11-18 Norman H Stark High temperature infrared radiant heating device

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3797375A (en) * 1972-03-16 1974-03-19 Jenn Air Corp Stove with selectively interchangeable cooking apparatus
FR2229929A1 (cs) * 1973-05-18 1974-12-13 Jenn Air Corp
US3819903A (en) * 1973-06-28 1974-06-25 Whirlpool Co Ceramic cooktop with a spiralled heating coil element assembly
US3838505A (en) * 1973-11-02 1974-10-01 Whirlpool Co Method of forming glass-ceramic cooktop construction
US3870862A (en) * 1973-11-02 1975-03-11 Whirlpool Co Glass-ceramic cooktop construction
US3912905A (en) * 1974-02-25 1975-10-14 Kanthal Corp Electric resistance heating device
US3866018A (en) * 1974-04-01 1975-02-11 Gen Electric Molded plastic cooktop with heated glass-ceramic plate insert
US3859499A (en) * 1974-06-12 1975-01-07 Gen Motors Corp Airflow cooling system for heat-cleaning ranges
US4415788A (en) * 1981-06-08 1983-11-15 Jenn-Air Corporation Induction cartridge
US5019682A (en) * 1988-08-29 1991-05-28 Samsung Electronics Co., Ltd. Separable electrical cooker
US5432320A (en) * 1992-10-20 1995-07-11 Schott Glaswerke Cooking range
US5834739A (en) * 1996-11-05 1998-11-10 Barnstead/Thermolyne Corporation Stirring hot plate
US6274849B1 (en) * 1999-01-22 2001-08-14 Ceramaspeed Limited Radiant electric heater
US6297482B1 (en) 2000-07-26 2001-10-02 Maytag Corporation Ceramic-based downdraft cooktop having angled front face portion
US6501053B2 (en) 2000-07-26 2002-12-31 Maytag Corporation Control system for an appliance cooktop
US6339212B1 (en) * 2000-09-26 2002-01-15 General Electric Company Cooking appliance having controls cooled by natural convection and method of cooling the same
US6444958B1 (en) * 2000-09-26 2002-09-03 General Electric Company Cooking appliance and method of cooling the same
US6410892B1 (en) * 2001-06-19 2002-06-25 Bsh Home Appliances Corporation Cooktop having a flat glass ceramic cooking surface
US20050269311A1 (en) * 2004-06-04 2005-12-08 Maytag Corporation Ventilation system for a cooking appliance
EP1790911A1 (en) * 2005-11-25 2007-05-30 LG Electronics, Inc. Cook-top and cooking system with cooling system
US20100307476A1 (en) * 2007-12-05 2010-12-09 Kwon Jung-Ju Cooking appliance
US8991385B2 (en) * 2007-12-05 2015-03-31 Lg Electronics Inc. Cooking appliance
US20100089378A1 (en) * 2008-10-13 2010-04-15 Babington Robert S Mobile Kitchen
US8499755B2 (en) * 2008-10-13 2013-08-06 Babington Enterprises Mobile kitchen

Also Published As

Publication number Publication date
BE752099A (cs) 1970-12-01
DE2043631A1 (de) 1971-04-15
FR2065811A5 (cs) 1971-08-06
NL7011618A (cs) 1971-04-08
GB1289016A (cs) 1972-09-13
CA922767A (en) 1973-03-13
AU1491370A (en) 1971-11-18

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Legal Events

Date Code Title Description
AS Assignment

Owner name: WHITE CONSOLIDATED INDUSTRIES, INC.

Free format text: MERGER;ASSIGNOR:TAPPAN COMPANY, THE,;REEL/FRAME:004976/0324

Effective date: 19861231