US 4,054,768 A · System for increasing visibility and microwave distribution within a microwave oven

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.

Claims15

Dependent claims

A microwave oven, comprising:

enclosure means for confining microwave energy and creating a cavity for receiving a body to be heated by the confined microwave energy;
and means for introducing microwave energy into said cavity;
said enclosure means including a door mounted for movement between a first closed position that with the remainder of said enclosure means confines said microwave energy and a second open position providing access to said cavity for the insertion and withdrawal of a body to be heated;
said enclosure means being provided with a microwave shield having a plurality of transparent portions of insufficient size to pass the microwave energy from the cavity through said enclosure means to the exterior, and of sufficient size and quantity to provide visibility through said enclosure means from the outside to view the body within said cavity;
and means for periodically moving said shield relative to the remainder of said enclosure means to increase the visibility through said shield to the cavity for viewing of the body to be heated.

2 more elements

Dependencies are inferred from the claim text.

System for increasing visibility and microwave distribution within a microwave oven

Life of this patent

System for increasing visibility and microwave distribution within a microwave oven

Life of this patent

Abstract

Claims15