Insulating device allowing a small gas furnace (oven) to be constructed

摘要

The invention relates to a thermally insulating device consisting of the superposition of thin metal sheets leaving an air gap between them. The production of a furnace uses this same device in the form of concentric cylinders (1) placed on a refractory plate (5), the cylinders being pierced with a slot (2) for the passage of a flame and joined to one another via a rod (4) passing through diametrically opposite holes (3). A lid composed of four to five superimposed metal sheets (7) joined together by a rod (8) equipped with three supports (9) completes the furnace. <IMAGE>