US3781504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction cooking appliance including temperature sensing of inductively heated cooking vessel by radiation detection means
Assignee: General Electric Co
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Filing: 1971-12-29
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Granted: 1973-12-25
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Expires: 1991-12-29
Abstract
Abstract Herein disclosed is an induction range having a counter on which there is rested a cooking vessel to be inductively heated by an induction coil having an air core; the induction coil being located below the counter. The counter has a passage therethrough extending from the top, or working, surface thereof, on which the cooking vessel rests, to a lower surface thereof near the induction coil. The passage in the counter and the induction coil''s core are in register. A bolometer is situated below the induction coil. The vessel rests on the working surface of the counter and covers the passage so that the bottom of the vessel is in an unobstructed line with the bolometer. The bolometer receives radiant heat energy from the inductively heated vessel and is instrumental in determining the temperature thereof.
Inventors
- 👤 J Harnden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:51
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/06; H05B6/062; F; F24; F24C; F24C15/00; F24C15/10; F24C15/102; F24C15/105
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
211 words
An induction cooking appliance, for heating a vessel having at least one portion thereof in which electric current may be induced to heat said one portion, comprising: vessel supporting means comprising material in which no substantial amount of current is induced when said supporting means is subjected to a changing magnetic field, said supporting means including a surface on which said vessel is supportable and a passage which extends through said supporting means, said passage defining at one end thereof a first opening terminating at said surface and a second opening at another end of said passage, said one portion of said vessel being adjacent said first opening as said vessel is supported on said surface of said supporting means; an induction coil energizable for generating a changing magnetic field whereby electric current is induced in said one portion to heat said one portion, said one portion radiating energy in response to the heating thereof through said first opening, said passage and said second opening; means for energizing said coil with electric power of at least ultrasonic frequency; radiant energy detection means for receiving the energy radiated through said second opening; and, means coupleD with said detection means for providing a signal representative of the temperature of the energy-radiating one portion.
Claim 2
Dependent Claim
211 words
An induction cooking appliance, for heating a vessel having at least one portion thereof in which electric current may be induced to heat said one portion, comprising: vessel supporting means comprising material in which no substantial amount of current is induced when said supporting means is subjected to a changing magnetic field, said supporting means including a surface on which said vessel is supportable and a passage which extends through said supporting means, said passage defining at one end thereof a first opening terminating at said surface and a second opening at another end of said passage, said one portion of said vessel being adjacent said first opening as said vessel is supported on said surface of said supporting means; an induction coil energizable for generating a changing magnetic field whereby electric current is induced in said one portion to heat said one portion, said one portion radiating energy in response to the heating thereof through said first opening, said passage and said second opening; means for energizing said coil with electric power of at least ultrasonic frequency; radiant energy detection means for receiving the energy radiated through said second opening; and, means coupleD with said detection means for providing a signal representative of the temperature of the energy-radiating one portion.
Claim 3
Dependent Claim
15 words
The appliance according to claim 1 wherein said radiant energy detection means includes a bolometer.
Claim 4
Dependent Claim
70 words
The appliance according to claim 1 wherein said radiant energy detection means includes a radiant energy propagation means and a bolometer, said propagation means having an end thereof in communication with at least said second opening and another end thereof in communication with said bolometer whereby energy radiating from said one portion is transmitted to said bolometer by way of a path comprising said second opening and said propagation means.
Claim 5
Dependent Claim
179 words
An induction cooking appliance, for heating a cooking vessel having at least one portion thereof in which heating current may be induced to heat said one portion whereby the heated one portion radiates heat energy, comprising: vessel supporting means in which no substantial heating current is induced when said supporting means is subjected to a changing magnetic field, said supporting means including a passage therethrough defining first and second openings at opposing ends of said passage, said supporting means being adapted for having said vessel supported thereby with at least a part of said one portion of said vessel being proximate said first opening and radiating heat energy through said first opening, said passage and said second opening; an induction coil energizable for generating a changing magnetic field in said one portion of said vessel supported by said supporting means; means for energizing said coil with electric power of at least ultrasonic frequency; and, detection means receiving the radiant heat energy from said second opening for determining the temperature of said part of said one portion of said vessel.
Claim 6
Dependent Claim
179 words
An induction cooking appliance, for heating a cooking vessel having at least one portion thereof in which heating current may be induced to heat said one portion whereby the heated one portion radiates heat energy, comprising: vessel supporting means in which no substantial heating current is induced when said supporting means is subjected to a changing magnetic field, said supporting means including a passage therethrough defining first and second openings at opposing ends of said passage, said supporting means being adapted for having said vessel supported thereby with at least a part of said one portion of said vessel being proximate said first opening and radiating heat energy through said first opening, said passage and said second opening; an induction coil energizable for generating a changing magnetic field in said one portion of said vessel supported by said supporting means; means for energizing said coil with electric power of at least ultrasonic frequency; and, detection means receiving the radiant heat energy from said second opening for determining the temperature of said part of said one portion of said vessel.
Claim 7
Dependent Claim
46 words
The appliance according to claim 4 wherein said induction coil includes an air core which is proximate said second opening and wherein said detection means is proximate said air core and receives radiant heat energy which is propagated through said air core from said second opening.
Claim 8
Dependent Claim
75 words
The appliance according to claim 4 further comprising: radiant heat energy propagation means having first and second opposing end portions, said first end portion being received in said passage and terminating at said first opening, the remainder of said propagation means extending from said passage through said second opening to a location remote from said supporting means and said induction coil whereat said second end portion of said propagation means is proximate said detection means.
Claim 9
Dependent Claim
13 words
The appliance according to claim 6 wherein said detection means is a bolometer.
Claim 10
Dependent Claim
13 words
The appliance according to claim 4 wherein said detection means is a bolometer.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |