Electric heating – Metal heating – Of cylinders
Patent
1976-08-06
1977-10-18
Grimley, Arthur T.
Electric heating
Metal heating
Of cylinders
219 1055F, H05B 906
Patent
active
040547680
ABSTRACT:
Visibility to the interior of a microwave oven is improved through a microwave shield that can be driven with periodic motion to increase the visibility through the shield, with such driving being accomplished by an electromechanical vibrator, a manual impulse given to the shield that is spring mounted, a power take-off from a conventional motor driven microwaver mixer, a separately motor driven cam, or the like. Such periodic motion may be oscillation such as reciprocation, or rotary with constant, decreasing or increasing amplitude, which amplitude may be the distance between adjacent apertures in the shield. Such periodic movement of the shield will scatter the microwave energy striking it and improve the distribution of microwave energy within the oven, which scattering may be enhanced by a three-dimensional mechanical texture given to the interior face of the shield, a coating with crystalline or metallic particles, or the like that will randomly scatter microwave energy striking it.
REFERENCES:
patent: 2920174 (1960-01-01), Haagensen
patent: 2958754 (1960-11-01), Hahn
patent: 3088453 (1963-05-01), Grahn et al.
patent: 3177334 (1965-04-01), Kinkle
White Donald A.
White Donald J.
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