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A cavity, such as an oven cavity, is heated by at least one monolithic integrated heat source, each fabricated by depositing a layer of resistive material on a substrate of non-conducting, or insulating, material. A pair of spaced-apart conductive elements contact opposite ends of the resistance she

A cavity, such as an oven cavity, is heated by at least one monolithic integrated heat source, each fabricated by depositing a layer of resistive material on a substrate of non-conducting, or insulating, material. A pair of spaced-apart conductive elements contact opposite ends of the resistance sheet to enable a flow of current through the sheet thereby producing substantially uniform heating over the entire area covered by the resistive sheet.

대표청구항 ▼

An oven having an oven cavity heated by conversion of electrical energy into heat energy, comprising: a substrate fabricated of an electrically insulative and thermally conductive material and with a geometric shape enclosing said oven cavity to be heated, said substrate having a first surface formi

An oven having an oven cavity heated by conversion of electrical energy into heat energy, comprising: a substrate fabricated of an electrically insulative and thermally conductive material and with a geometric shape enclosing said oven cavity to be heated, said substrate having a first surface forming the exterior surface of said cavity and a second surface forming an interior surface of said cavity and from which heat energy enters said cavity after conduction through said substrate; a plurality of spaced-apart electrically conductive members positioned adjacent to said substrate first surface; a sheet of material directly secured between, and in electrical contact with, said plurality of conductive members and secured to at least a portion of said substrate first surface; at least one additional plurality of spaced-apart electrically conductive members positioned adjacent to said substrate first surface at a location remote from said plurality of conductive members; at least one additional sheet of material, each secured to other portions of said substrate first surface different from the portion of said substrate first surface to which said sheet of material is secured, each of said at least one additional sheet directly secured and electrically connected between at least an associated pair of the at least one additional plurality of conductive members; the material of said sheet and said at least one additional sheet having a predetermined electrical resistance measurable between different ones of said conductive and additional conductive members; the resistance of said material of said sheet and of said at least one additional sheet of material causing conversion of electrical energy, coupled into said sheet and said at least one additional sheet via associated ones of the total number of said conductive members, into heat energy for energy transfer through said substrate and from said substrate second surface into said cavity; and means for connecting a source of electrical energy to predetermined ones of the total number of conductive members to cause electrical energy to be converted to heat energy in associated predetermined ones of the sheet and the at least one additional sheet fabricated upon said substrate first surface.