EP0117346A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Heating apparatus
Assignee: QED Intellectual Property Ltd
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Filing: 1983-12-02
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Granted: —
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Expires: 2003-12-02
Abstract
Abstract @ Heating apparatus consists of a shallow circular tray (1) having a layer (2) of thermally insulative material disposed therewithin and supporting four infra-red-emitting, tunsten- halogen lamps (7) on flanges (3, 4). A moulding (8) of ceramic fibre material is press-fitted around the ends of the lamps (7) and a thermal limiter (11) is provided to limit the operating temperature of the apparatus. Each lamp (7) is provided with a reflective coating along the lower part thereof, so as to reflect upwardly infra-red radiation emitted in a downward direction.A number, preferably four, of the heating apparatuses are disposed beneath a layer of glass ceramic to provide a cooking hob.
Inventors
- 👤 Peter William Crossley
- 👤 Bernard Frederick Fellerman
- 👤 Graham Howlett Goodchild
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 23:44
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/68; H05B3/74; H05B3/746; H05B3/744; H05B2213/00; H05B2213/04; H05B2213/07
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
98 words
Heating apparatus comprising at least one source (7) of infra-red radiation arranged beneath a support means (15) for supporting a utensil containing food to be heated by said at least one source (7), characterised in that said apparatus includes a layer (2) of thermally insulative material disposed beneath said at least one source (7), and means (16) for reflecting infra-red radiation emitted from said at least one source, said means (16) being disposed between said at least one source (7) of infra-red radiation and a major part of the body of said layer (2) of thermally insulative material.
Claim 2
Dependent Claim
98 words
Heating apparatus comprising at least one source (7) of infra-red radiation arranged beneath a support means (15) for supporting a utensil containing food to be heated by said at least one source (7), characterised in that said apparatus includes a layer (2) of thermally insulative material disposed beneath said at least one source (7), and means (16) for reflecting infra-red radiation emitted from said at least one source, said means (16) being disposed between said at least one source (7) of infra-red radiation and a major part of the body of said layer (2) of thermally insulative material.
Claim 3
Dependent Claim
17 words
Heating apparatus as claimed in Claim 1 wherein said thermally insulative material comprises a microporous insulative material.
Claim 4
Dependent Claim
37 words
Heating apparatus as claimed in claim 1 or 2 wherein said at least one source (7) of infra-red radiation consists of a tungsten-halogen lamp (14) including a tungsten filament (17) supported within a generally tubular quartz envelope.
Claim 5
Dependent Claim
39 words
Heating apparatus as claimed in claim 3 wherein said means (16) for reflecting infra-red radiation comprises a coating (16) of a metallic oxide material, said coating (16) being formed on a lower portion of the surface of said envelope.
Claim 6
Dependent Claim
32 words
Heating apparatus as claimed in claim 1, 2, 3 or 4 wherein said support means (15) comprises a layer (15) of glass ceramic extending over the area directly above said heating apparatus.
Claim 7
Dependent Claim
23 words
Heating apparatus as claimed in any preceding claim wherein said layer (2) of insulative material is accommodated within a shallow tray member (1).
Claim 8
Dependent Claim
34 words
Heating apparatus as claimed in any preceding claim wherein a moulding (8) of ceramic fibre material is press-fitted around the ends of said at least one source (7), to provide a flexible packing therefor.
Claim 9
Dependent Claim
39 words
Heating apparatus as claimed in any preceding claim and including a temperature control arrangement consisting of switching means for interconnecting said sources (7) in various combinations, so as to provide a range of power outputs from said sources (7).
Claim 10
Dependent Claim
33 words
Heating apparatus as claimed in claim 8 wherein said switching means includes a diode (13) connected to at least one of said combinations, so as to produce power outputs suitable for simmering purposes.
Claim 11
Dependent Claim
31 words
Heating apparatus as claimed in any one of claims 1 to 7 and including a temperature control arrangement, to provide phase control of the at least one source of infra-red radiation.
Claim 12
Dependent Claim
18 words
Heating apparatus as claimed in claim 10 wherein said arrangement includes a continuously energised source of infra-red radiation.
Claim 13
Dependent Claim
18 words
Heating apparatus as claimed in any preceding claim and including an optical filter for obstructing undesirable visible light.
Claim 14
Dependent Claim
24 words
Heating apparatus as claimed in any preceding claim and incorporating a thermal limiter (11) to ensure that a maximum operating temperature is not exceeded.
Claim 15
Dependent Claim
33 words
Heating apparatus as claimed in claim 13 wherein said thermal limiter (11) is shielded from incident infra-red radiation, so as to increase substantially the accuracy with which the limiter monitors said operating temperature.
Claim 16
Dependent Claim
15 words
A cooking hob incorporating at least one heating apparatus as claimed in any preceding claim.
Claim 17
Dependent Claim
48 words
A cooking hob as claimed in claim 15 incorporating two or more of said heating apparatuses, each heating apparatus having a diode (13) provided in a switching means associated therewith, said diodes (13) being randomly poled so as to ensure an evenly-distributed loading on the mains power supply.
References Cited (Backward Citations)
No citation records indexed.
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