Abstract: In capacitive systems comprising a dielectric sheet 11 having a first electrode 12 on one side, and on the other side in capacitive relation with the first electrode 12, second and third electrodes 13, 14 which are mutually spaced by a gap 15 especially for use in touch control switches, it is desired to achieve a favorable compromise between high capacitance modification as between touched and untouched condition of the first electrode 12, and the total amount of material used to form the electrodes.To this end, the third or outer electrode 14 is shaped to surround at least the major part of the periphery of the second or inner electrode 13, and the ratio of the area of the inner electrode 13 to the area of the outer electrode 14 is greater than 0.25 to 1.

Abstract: A metal oxide coating is formed on a vitreous or non-vitreous substrate by applying a solution containing at least one metal compound to the substrate and then heating the coated substrate to convert the compound in situ to leave a coating of metal acetyl acetonate or a mixture of metal acetyl acetonates in a solvent including an aprotonic solvent, a substituted or unsubstituted monocarboxylic acid solvent, an amine or diamine solvent, or a mixture of two or more solvents selected from these groups.

Abstract: A heat insulating screen forming a part of an oven or furnace comprising two or more sheets of glass of vitrocrystalline material mounted in facing relationship, one sheet providing one exterior face of the screen having been subjected to a chemical tempering treatment, the other sheet providing the other exterior face of the screen having improved thermal properties which are obtained either by utilizing a borosilicate glass which has a coefficient of thermal expansion of less than 5 x 10.sup.-6 /.degree. C or a sheet bearing at least one coating capable of screening off a significant amount of incident infrared radiation.

Abstract: A metallic oxide coating is formed on a substrate which may be vitreous, partially vitreous or nonvitreous by applying to the substrate a solution of one or more metallic salts selected from the group of the acetates, halides and nitrates in an aprotic solvent having a dielectric constant greater than 15 and a dipolar moment greater then 3D. The substrate and applied solution are then subjected to heat to convert in situ the metallic salt to form a coating comprising at least one metallic oxide.