Electric heating – Metal heating – Of cylinders
Patent
1987-03-04
1988-06-21
Leung, Philip H.
Electric heating
Metal heating
Of cylinders
219 1055A, 333230, H05B 672
Patent
active
047526637
ABSTRACT:
A microwave oven the rectanguloid heating chamber 6 of which has at least two dimensions less than a wavelength of the energy supply thereto and capable of heating between 60-100 grams of food to an edible temperature in 30 seconds or less is provided. The oven comprises a housing 1 coupled to an energy source 2 by way of a coaxial cable 3 and a waveguide 4. The waveguide 4 has a horn 5 providing the transition to the chamber 6 encased by the housing 1. The larger end of the horn 5 feeds into the chamber 6 while the smaller end is connected to the waveguide 4. A lens essentially comprising a laminate assembly of dielectric material plates 11,12 carrying a prism 11 directed into the waveguide 4 is positioned between the horn 5 and the chamber 6. The chamber 6 has a volume of about 0.00168 cubic meters and the power input of the oven is between 600 and 1200 watts.
REFERENCES:
patent: 2480682 (1949-08-01), Stiefel
patent: 2856497 (1958-10-01), Rudenberg
patent: 2888543 (1959-05-01), Haagensen
patent: 3715551 (1973-02-01), Peterson
patent: 3740514 (1973-06-01), Anderson
patent: 3855440 (1974-12-01), Staats et al.
patent: 4157464 (1979-06-01), Smith et al.
patent: 4640280 (1987-02-01), Sterzer
Leung Philip H.
Quindicum Limited
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