CA2358246A1 - Stovetop burner with safety feature - Google Patents
Stovetop burner with safety feature Download PDFInfo
- Publication number
- CA2358246A1 CA2358246A1 CA002358246A CA2358246A CA2358246A1 CA 2358246 A1 CA2358246 A1 CA 2358246A1 CA 002358246 A CA002358246 A CA 002358246A CA 2358246 A CA2358246 A CA 2358246A CA 2358246 A1 CA2358246 A1 CA 2358246A1
- Authority
- CA
- Canada
- Prior art keywords
- heat generating
- generating element
- electromagnet
- burner
- stovetop
- 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.)
- Abandoned
Links
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
-
- 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
- H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
- H05B2213/05—Heating plates with pan detection means
Abstract
A stovetop burner has an electromagnet and safety control means for enabling burner operation only when the electromagnet is energized to hold a cooking utensil on the burner.
Description
_i-, This i»v~antion relates to stovetop burners such as s electric and gas burners of kitchen ranges.
Kitchen ranges commonly have a stovetop with several 0 individual burners upon whiab cooking utensils may be set for cocking their ovntents. T'he burnerB are usually either electrio or gas. Where they arH electric they oom~nonly have an electric resistance heating element in the shape of a flat spiral or coil. A cooking utensil such as a pot or ;5 ° pan is~ set directly on the heating element. Gas burners usually have an annular bet that is recessed below a support grill upon which the cooking utensil is set.
Being hot, stovetop burners :lnhaxently axe hazardous.
one may touoh the electric heating element not realizing 30 that it is hot. The flame fronu a gas jet may actually ignite the sleavg of a garment. Mere importantly, a hat pot or pan may ' be tipped by accidental contact with it~a handle. Small children may reach up and grab a pot har~dl~
-z-and cause the pot to tip and its contents to pour.
I;andfoappsd people, such as those confined to whealchairs~, also are gusceptiblg to such accidents. In same cases even ~.arga dogs have been known to have done this. when this occurs, not only may~the hot utensil contact and burn the child, adult or pet, its hot contents can also make such bodily contact.
=t thus is seen that a need exists for safer stovetop ~,urnora~. Aacardingly, it 1e to they proviBion e~ ssuch that the present invention is primarily directed.
In a preferred form of the invention= a ~stovstop burner has a gas or electric heat generating element. A»
electromagnet ie~ mounted'adiacent to the heating element.
A safety control circuit is provided for enabling operation of the heat generating element only while they electromagnet pp is energized for holding a cooking utensil upon the heat generating element.
xhe burner may also have ~meana for detecting the prenence of a cooking utensil upon the heat generating element. In that case the safety control circuit enables Zs operation of the het generating el~ment only whil~ the e~eneor detects the actu4l presence of a~ utensil. The detection means itself includes a ~wltch po$itioned adjacent the heating element for~movement by the cooking utanBil to a closed position as the utensil ie get upon the 3D heating element.
9s _3~
.Ot~ QL~~'~
Fig. 1 leg a gchematia diagram of a stovetop burnex of the present invention.
Fig. 2 is a perspective view of the stovetop burner of S Fig. 1 with a pot shown pesitlongCl oVBx thH burnar~
Figs. 3A a»d ~a are elide views showing depression of a plunger as a pot is set upon the burner.
Figs. 4A and 4H show a pot being set. upon a gas type stovetop burner that also incorporates principles o! the ,p invention.
-With reference next in more detail to the drawings.
there is shown in Fige. 1-3 a st~avetop burner ~o that has a conventional coiled electric heat resistr~tst e~.eme~nt ~.~.. , An electromagnet 12 is rigidly mounted in the asnter of the heating element. the electromagnet is of a heat rasistr~nt type such as P~coduct No. CEX~:3o0~12C Bold by the ANG
p Magnetics Division of Automatic Hquipment Corporation off' Cincinnati, chic. It aan withstand temperatures to 400° F.
If desired, its tap may be covered with a sheet of thin veneer for washability. Its sides may also be covered with therraal insulation. The burner also hasp a plunger 18 that s~ is biased upwardly to the position shown in Figs. ~. arid 3A
by tension springs i9. The top at the plunger is biased to a position a little above the t,op surface of the heating element ~.i. It is ~aot~nted for downward movement in response to placement of a cast iron or other ferromagnetic cooking utensil on the heating element. Note that in its depressed, lower position shown in ~'ig. 38 it closes a~n electric plunger switch ~0.
The elBCtric heating resistance element ii is connected with an unehown pow8r source through a conventional control switch ~22 mounted on the stove ~/j-console. Ths switch includes a rheostat so that the heating eleme»t can be a»ergizeci, at various levels of power, as is conventional. In this case howev~ar the switch.
22 is normally ineffective in connecting the heating element 11 with power. This is due to the press»c~ of the plunger ~awitoh 2o being ope» and in aeries c~,rcuit with the control stwitch 22. Moreover, another in-Bgries electromagnet switch, shown only :~.n Fige. 1 and 2 as I~IAc oN, must also be c7.osed before the heating element can be l energised. The MAG oN switch cart also only be activated when plunger switch 2o is closed. When the MAG oN switch is closed the electxor~ag»et is can»eeted to power through a power adaptor 1~1 which converts municipal. power to low voltage d.c. Buch as lx volts d.c.
s Sa ca»structed it is seen that the heating ~lement 11 can be energized only when both the plunger switch 20 is closed and the electromagnet is awi,tched on. For these two conditions to be ~aet, a cooking utens~.l must be both on the burner, covering the heating oiement,'and therefore held 0 thereto by the electromagnet. Thus o»e cannot accidentiy touch the heating element ii while it is energi.~ed. Nor can one sccide»tly knock a terromag3letiC pot or par ot! the heating element while it 3,s ene~rgizesd since it is held thereto by the electromagnet as indicated by the arrows i»
.5 ~'ig. 38. Though preferred, it is not easex~tial to have the plunger to detect the avtual presence of the utensil.
Nevertheless in that case the heating element still cannot be energized until the MAC ON switch is closed.
Additionally, the electromagnet itself could serve as the so plunger by mounting it for limited spring biased movement in actuating the switch. The burner or other element may also serve as a plunger. Any other sensor that detects the presence of the in-place cooking utensil oould act~.vate the described safety elements.
Figs. 4A and dH illustrate a eto~stetop burner of a type that has a gaa~ operated heater 34 that smite an annular flame from an annular array of jets. art this case the stovetop burner is provided with a centrally mounted s elsatrotaagnet 12. The electrortagnst is again operated by a switch as previously described wh3.ch must be closed before the gas ignitor is nude operational. Again, th~
gas-on switch ie rendered effective in spark igniting the gee when the piuage~r 32 here is depressed by a t0 ferro~uagnatic pct or pan or the like and the MAG oN switch is aloaed.
=t thu~a is seen that a stovetop burner is now provided that is ~cafer to operate than 'hho~te of conventionz~l _ construction. When the stove is on, be it electr~.G or gee, is a ~aagnetic field ie generated that holds any cooking utensil made of rerromagnetic material in plane over the heat source. To dissipate th3.s magnetic field in order to remove the utensil, the stove burner itself must normally be turned off.
2o The magnet3.c field 3.s preferably provided by an electromagnet although ~a permanent magnet could be substituted. In that case a moveable pole piece would be employed to shunt the magnetic glu~c in releasing the pot.
However, an electrom$gnet is etr~angly preferred for a number of reasons.
Although the invention has bean described and 111ustrated in its preterre~d form, it should be understood that many ~aodif ications, changes or. additions may be a~ad~
without daparture from the spirit and scope of the invent3~on r~s set forth in the following claims.
Kitchen ranges commonly have a stovetop with several 0 individual burners upon whiab cooking utensils may be set for cocking their ovntents. T'he burnerB are usually either electrio or gas. Where they arH electric they oom~nonly have an electric resistance heating element in the shape of a flat spiral or coil. A cooking utensil such as a pot or ;5 ° pan is~ set directly on the heating element. Gas burners usually have an annular bet that is recessed below a support grill upon which the cooking utensil is set.
Being hot, stovetop burners :lnhaxently axe hazardous.
one may touoh the electric heating element not realizing 30 that it is hot. The flame fronu a gas jet may actually ignite the sleavg of a garment. Mere importantly, a hat pot or pan may ' be tipped by accidental contact with it~a handle. Small children may reach up and grab a pot har~dl~
-z-and cause the pot to tip and its contents to pour.
I;andfoappsd people, such as those confined to whealchairs~, also are gusceptiblg to such accidents. In same cases even ~.arga dogs have been known to have done this. when this occurs, not only may~the hot utensil contact and burn the child, adult or pet, its hot contents can also make such bodily contact.
=t thus is seen that a need exists for safer stovetop ~,urnora~. Aacardingly, it 1e to they proviBion e~ ssuch that the present invention is primarily directed.
In a preferred form of the invention= a ~stovstop burner has a gas or electric heat generating element. A»
electromagnet ie~ mounted'adiacent to the heating element.
A safety control circuit is provided for enabling operation of the heat generating element only while they electromagnet pp is energized for holding a cooking utensil upon the heat generating element.
xhe burner may also have ~meana for detecting the prenence of a cooking utensil upon the heat generating element. In that case the safety control circuit enables Zs operation of the het generating el~ment only whil~ the e~eneor detects the actu4l presence of a~ utensil. The detection means itself includes a ~wltch po$itioned adjacent the heating element for~movement by the cooking utanBil to a closed position as the utensil ie get upon the 3D heating element.
9s _3~
.Ot~ QL~~'~
Fig. 1 leg a gchematia diagram of a stovetop burnex of the present invention.
Fig. 2 is a perspective view of the stovetop burner of S Fig. 1 with a pot shown pesitlongCl oVBx thH burnar~
Figs. 3A a»d ~a are elide views showing depression of a plunger as a pot is set upon the burner.
Figs. 4A and 4H show a pot being set. upon a gas type stovetop burner that also incorporates principles o! the ,p invention.
-With reference next in more detail to the drawings.
there is shown in Fige. 1-3 a st~avetop burner ~o that has a conventional coiled electric heat resistr~tst e~.eme~nt ~.~.. , An electromagnet 12 is rigidly mounted in the asnter of the heating element. the electromagnet is of a heat rasistr~nt type such as P~coduct No. CEX~:3o0~12C Bold by the ANG
p Magnetics Division of Automatic Hquipment Corporation off' Cincinnati, chic. It aan withstand temperatures to 400° F.
If desired, its tap may be covered with a sheet of thin veneer for washability. Its sides may also be covered with therraal insulation. The burner also hasp a plunger 18 that s~ is biased upwardly to the position shown in Figs. ~. arid 3A
by tension springs i9. The top at the plunger is biased to a position a little above the t,op surface of the heating element ~.i. It is ~aot~nted for downward movement in response to placement of a cast iron or other ferromagnetic cooking utensil on the heating element. Note that in its depressed, lower position shown in ~'ig. 38 it closes a~n electric plunger switch ~0.
The elBCtric heating resistance element ii is connected with an unehown pow8r source through a conventional control switch ~22 mounted on the stove ~/j-console. Ths switch includes a rheostat so that the heating eleme»t can be a»ergizeci, at various levels of power, as is conventional. In this case howev~ar the switch.
22 is normally ineffective in connecting the heating element 11 with power. This is due to the press»c~ of the plunger ~awitoh 2o being ope» and in aeries c~,rcuit with the control stwitch 22. Moreover, another in-Bgries electromagnet switch, shown only :~.n Fige. 1 and 2 as I~IAc oN, must also be c7.osed before the heating element can be l energised. The MAG oN switch cart also only be activated when plunger switch 2o is closed. When the MAG oN switch is closed the electxor~ag»et is can»eeted to power through a power adaptor 1~1 which converts municipal. power to low voltage d.c. Buch as lx volts d.c.
s Sa ca»structed it is seen that the heating ~lement 11 can be energized only when both the plunger switch 20 is closed and the electromagnet is awi,tched on. For these two conditions to be ~aet, a cooking utens~.l must be both on the burner, covering the heating oiement,'and therefore held 0 thereto by the electromagnet. Thus o»e cannot accidentiy touch the heating element ii while it is energi.~ed. Nor can one sccide»tly knock a terromag3letiC pot or par ot! the heating element while it 3,s ene~rgizesd since it is held thereto by the electromagnet as indicated by the arrows i»
.5 ~'ig. 38. Though preferred, it is not easex~tial to have the plunger to detect the avtual presence of the utensil.
Nevertheless in that case the heating element still cannot be energized until the MAC ON switch is closed.
Additionally, the electromagnet itself could serve as the so plunger by mounting it for limited spring biased movement in actuating the switch. The burner or other element may also serve as a plunger. Any other sensor that detects the presence of the in-place cooking utensil oould act~.vate the described safety elements.
Figs. 4A and dH illustrate a eto~stetop burner of a type that has a gaa~ operated heater 34 that smite an annular flame from an annular array of jets. art this case the stovetop burner is provided with a centrally mounted s elsatrotaagnet 12. The electrortagnst is again operated by a switch as previously described wh3.ch must be closed before the gas ignitor is nude operational. Again, th~
gas-on switch ie rendered effective in spark igniting the gee when the piuage~r 32 here is depressed by a t0 ferro~uagnatic pct or pan or the like and the MAG oN switch is aloaed.
=t thu~a is seen that a stovetop burner is now provided that is ~cafer to operate than 'hho~te of conventionz~l _ construction. When the stove is on, be it electr~.G or gee, is a ~aagnetic field ie generated that holds any cooking utensil made of rerromagnetic material in plane over the heat source. To dissipate th3.s magnetic field in order to remove the utensil, the stove burner itself must normally be turned off.
2o The magnet3.c field 3.s preferably provided by an electromagnet although ~a permanent magnet could be substituted. In that case a moveable pole piece would be employed to shunt the magnetic glu~c in releasing the pot.
However, an electrom$gnet is etr~angly preferred for a number of reasons.
Although the invention has bean described and 111ustrated in its preterre~d form, it should be understood that many ~aodif ications, changes or. additions may be a~ad~
without daparture from the spirit and scope of the invent3~on r~s set forth in the following claims.
Claims (10)
1. A stovetop burner having a heat generating element, an electromagnet mounted adjacent said heat generating element, and safety control means for enabling operation of said heat generating element only while said electromagnet is energized for holding a cooking utensil upon the heat generating element.
2. The stovetop burner of claim 1 wherein said heat generating element is an electrical resistance element.
3. The stovetop burner of claim 2 wherein said electrical resistance element is a coil and wherein said electromagnet is located centrally within said soil.
4. The stovetop burner of claim 1 wherein said heat generating element is a gas burner.
5. The stovetop burner of claim 4 wherein said gas burner hag an annular array of jets and wherein said electromagnet is located centrally within said annular array of jets.
6. The stovetop burner of claim 1 wherein said safety control means comprises means for detecting the presence of a conking utensil upon said heat generating means.
7. The stovetop burner of claim 1 wherein said safety control means comprises an electric circuit with a switch positioned adjacent said electromagnet for movement to a closed position by the weight of a cooking utensil position on said heat generating element.
8. The stovetop burner of claim 7 further comprising a plunger spring biased to an unloaded position above said heat generating element and wherein said switch is located in operative association with said plunger.
9. A stovetop burner having a heat generating element, an electromagnet mounted adjacent said heat generating element, and electric circuit means for coupling said heat generating element and said electromagnet to a power source with said heat generating element coupling being conditioned on said electromagnet being coupled.
10. The stovetop burner of claim 9 wherein said heat generating element is ann electric resistance coil and wherein said electromagnet is mounted centrally within said electric resistance coil.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/588,919 US6300603B1 (en) | 2000-06-08 | 2000-06-08 | Stovetop burner with safety feature |
| CA002358246A CA2358246A1 (en) | 2000-06-08 | 2001-10-05 | Stovetop burner with safety feature |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/588,919 US6300603B1 (en) | 2000-06-08 | 2000-06-08 | Stovetop burner with safety feature |
| CA002358246A CA2358246A1 (en) | 2000-06-08 | 2001-10-05 | Stovetop burner with safety feature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2358246A1 true CA2358246A1 (en) | 2003-04-05 |
Family
ID=31189175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002358246A Abandoned CA2358246A1 (en) | 2000-06-08 | 2001-10-05 | Stovetop burner with safety feature |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US6300603B1 (en) |
| CA (1) | CA2358246A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6805114B2 (en) * | 2002-02-22 | 2004-10-19 | Thomas Hobson Outten | Attachment for gas grill for automatic burner ignition and method |
| US7135658B2 (en) * | 2004-06-08 | 2006-11-14 | Paul J Rael | Magnetic safety feature for cookware and cooking stoves |
| DE102009014570A1 (en) * | 2009-03-17 | 2010-09-23 | E.G.O. Elektro-Gerätebau GmbH | Method for controlling a hotplate of a gas range as well as device |
| DE102012213831A1 (en) * | 2012-08-03 | 2014-05-22 | E.G.O. Elektro-Gerätebau GmbH | Measuring device and system |
| EP2716186A1 (en) * | 2012-10-08 | 2014-04-09 | Damian Evans | Apparatus with mixing bowl, base, and magnetic means |
| US9220365B1 (en) * | 2014-04-23 | 2015-12-29 | Chinwe Okonkwo | Electromagnet for fastening cookware to a stovetop element |
| WO2016029959A1 (en) * | 2014-08-29 | 2016-03-03 | Arcelik Anonim Sirketi | Induction heating cooker cooking utensil positioning safety arrangement |
| US10228144B2 (en) | 2015-05-28 | 2019-03-12 | Whirlpool Corporation | Method of pan detection and cooktop adjustment for multiple heating sections |
| US10959568B2 (en) * | 2018-02-09 | 2021-03-30 | Patrick M. Tweel | Inductive heating vessels and methods of making and using same |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2497753A (en) | 1946-06-13 | 1950-02-14 | J E Shay Ltd | Electrical cooking and like appliances |
| US3134007A (en) * | 1961-12-29 | 1964-05-19 | Harry W Niblo | Electric hot plate stove |
| US3796850A (en) | 1973-05-31 | 1974-03-12 | Westinghouse Electric Corp | Pan detector for induction heating cooking unit |
| JPS5441143B2 (en) | 1974-02-04 | 1979-12-06 | ||
| US4319109A (en) | 1979-12-28 | 1982-03-09 | General Electric Company | Centered utensil sensor for induction surface units |
| DE4004129A1 (en) | 1990-02-10 | 1991-08-14 | Ego Elektro Blanc & Fischer | DEVICE FOR RECOGNIZING A COOKING VESSEL SET UP IN A HEATING ZONE OF A COOKING OR HEATING APPLIANCE |
| CH685598A5 (en) | 1992-10-07 | 1995-08-31 | Berndorf Luzern Ag | Means for transporting and keeping food warm. |
| US6031209A (en) * | 1998-03-26 | 2000-02-29 | Wiesman; Stephen F. | Magnetic pot holder for a stove |
-
2000
- 2000-06-08 US US09/588,919 patent/US6300603B1/en not_active Expired - Fee Related
-
2001
- 2001-10-05 CA CA002358246A patent/CA2358246A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| US6300603B1 (en) | 2001-10-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |