Claims
- 1. A heating assembly comprising:
- at least one tungsten halogen lamp capable when energized of generating infra-red radiation having a predetermined wavelength spectrum, a cooktop of glass ceramic material usefully transparent to infra-red radiation in part at least of said spectrum, means supporting said at least one lamp beneath said cooktop, thermally insulative and infra-red reflective means disposed beneath said at least one lamp and said cooktop and capable of inhibiting transmission of heat away from said cooktop and also of reflecting towards said cooktop without significant spectral change infra-red radiation generated by said at least one lamp and initially directed away from said cooktop, said thermally insulative and infra-red reflective means consisting at least of a non-metallic material, the cooktop, said at least one lamp and said thermally insulative and infra-red reflective means being juxtaposed and in closely proximate relationship with one another, whereby said assembly is of shallow construction and exhibits relatively rapid thermal response to energization and deenergization of said at least one lamp, the assembly further including limiting means responsive to the temperature of said cooktop to de-energize said at least one lamp when said temperature reaches a predetermined maximum value.
- 2. An assembly according to claim 1, wherein said non-metallic material comprises a microporous material.
- 3. An assembly according to claim 2, wherein said non-metallic material supports metallic oxide material reflective of infra-red radiation generated by said at least one lamp.
- 4. An assembly according to claim 1, wherein said non-metallic material supports metallic oxide material reflective of infra-red radiation generated by said at least one lamp.
- 5. An assembly according to claim 1, including a tray member containing and supporting said non-metallic material.
- 6. An assembly according to claim 1, including an optical filter for obstructing undesirable visible light.
- 7. A cooking hob incorporating at least one heating assembly as claimed in claim 1.
Priority Claims (3)
Number |
Date |
Country |
Kind |
8236797 |
Dec 1982 |
GBX |
|
8308105 |
Mar 1983 |
GBX |
|
8320717 |
Aug 1983 |
GBX |
|
Parent Case Info
This is a continuation of application Ser. No. 049,049, filed May 11, 1987, now U.S. Pat. No. 4,751,370 which is a Rule 62 continuation in part of U.S. Ser. No. 563,930, filed Dec. 21, 1983, now abandoned.
US Referenced Citations (14)
Foreign Referenced Citations (7)
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2164162 |
Jun 1973 |
DEX |
263254 |
Dec 1926 |
GBX |
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GBX |
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Continuations (1)
|
Number |
Date |
Country |
Parent |
49049 |
May 1987 |
|
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
563930 |
Dec 1983 |
|