Abstract: A method of tuning a production module using a reference module with virtual gain correction is provided. The method includes selecting a counterpart reference module created for a select application. The production module is commutatively coupled to the selected counterpart reference module to generate a production module pair. A production module gain curve for the production module pair is measured for each frequency band to be used by the production module. The production module is tuned based at least in part on offset gain values at select number of frequency observation points for each frequency band associated with the counterpart reference module and gain values at the select number of frequency observation points of the measured production module gain curve for each frequency band.

Abstract: A method of tuning a production module using a reference module with virtual gain correction is provided. The method includes selecting a counterpart reference module created for a select application. The production module is commutatively coupled to the selected counterpart reference module to generate a production module pair. A production module gain curve for the production module pair is measured for each frequency band to be used by the production module. The production module is tuned based at least in part on offset gain values at select number of frequency observation points for each frequency band associated with the counterpart reference module and gain values at the select number of frequency observation points of the measured production module gain curve for each frequency band.

Abstract: A curable resin comprising a mixture of (a) a component consisting of at least one thermically curable compound containing at least one 1-oxa-3-aza tetraline group, and (b) a component consisting of at least one curable brominated epoxy resin.

Abstract: Difficultly inflammable polymeric resins are obtained by curing resin mixtures comprising(a) a resin component comprising at least one thermically curable 1-oxa-3-aza tetraline groups containing compound; and(b) an organic metal or semimetal compound, or a carbon monoxide complex compound, of an element of the 6th, 7th or 8th auxiliary group of the periodic system or of copper, antimony or bismuth.

Abstract: An adhesive having a content of a thermically curable oxazene resin which contains at least one 1-oxa-3-aza tetraline group in the molecule, optionally in combination with at least one curable epoxy compound, is used for bonding polyimide films to films of the same kind or to other substrates, particularly metal foils. Such bondings are highly heat-resistant and have an excellent peeling resistance. Therefore, they are suitable for the manufacture of printed circuit boards having high thermal stability and peeling resistance.

Abstract: A resin which may be cured to form a polymeric resin which is diffcultly inflammable and resistant to high temperatures, said resin being a mixture of(a) a resin component comprising at least one thermically curable 1-oxa-3-aza tetraline group containing compound and optionally a curable epoxy compound; and of(b) a second component comprising at least one flame retardant selected from the group consisting of: aluminum hydroxide; hydrated calcium magnesium carbonate; magnesium hydroxide; element red phosphorus, oxygen acids of phosphorus; inorganic salts of oxygen acids of phosphorus; organic salts of oxygen acids of phsophorus; polyphosphates; boric acid; salts of boric acid.

Abstract: The present invention generally relates to the mounting of panes or windshields in a frame, particularly to the mounting of panes or windshields of a vehicle, e.g. an automobile, in the body frame work. The invention provides a pane or windshield ready to be mounted comprising, along its edges, a first profiled bead of adhesive material, already cured and being elastic but not plastically deformable. The first bead comprises an essentially closed hollow chamber and in its interior a second bead of plastically deformable not yet cured adhesive material consisting of a substance chemically compatible to the material of the first bead. The second bead, serving as the real adhesive material, is protected from environmental influences without the need to remove a cover foil or a packing prior to mounting the window.

Abstract: Plastisols of 80 to 5% by weight plasticizer and 20 to 95% by weight particulate polymer containing(a) from 5 to 60% by weight acrylonitrile, methacrylonitrile or mixture thereof(b) from 15 to 95% by weight styrene, .alpha.-methyl styrene or mixture thereof(c) from 0 to 10% by weight of a carboxylic acid copolymerizable with the monomers (a) and (b),(d) from 0 to 30% by weight and, in the absence of component (c), from 10 to 30% by weight of an alkylester of acrylic acid, methacrylic acid or mixtures thereofoptionally a diluent and other constituents, the percentages by weight of plasticizer and polymer being based on the sum of plasticizer and polymer and a process for making such plastisols.

Abstract: A composition comprising a polymeric resin derived from (A) at least one compound containing an average of more than one 1-oxa-3-aza-tetraline group per molecule with (B) at least one cycloaliphatic epoxide containing at least two epoxide groups, at least one of said epoxide groups being part of said ring, the mole ratio of (B) to (A) being in the range of about 0.2 to about 2.

Abstract: A method of manufacturing fibre-reinforced plastic articles out of prepregs, prepregs for the manufacture of fibre-reinforced plastic articles and fibre-reinforced plastic articles manufactured by such method. The prepregs contain glass-fibre mats having a fiber length of preferably 4 to 30 mm and a curable resin having a preferred viscosity in the range between 100 and 100 000 Ns/m.sup.2. The prepregs are shaped in a mold by vacuum forming and are cured by UV-light.

Abstract: A chord playing attachment for stringed instruments, such as guitars and the like, wherein combinations of string depressors are pressed down on the strings to produce a chord. The string depressors are connected with a spring action to a component which is attached to the instrument. This component serves the dual function of an attachment base for the string depressors as well as acting as a capo dastro.

Abstract: The presence of an organic liquid is detected by means of a probe which comprises a rubber-like material which is swellable in an organic liquid, which rubber-like material has electrically-conductive solid particles distributed therethrough, in such concentration as to touch each other.

Abstract: A composition comprising a polymeric resin derived from (A) at least one compound containing an average of more than one 1-oxa-3-aza-tetraline group per molecule with (B) at least one cycloaliphatic epoxide containing at least two epoxide groups, at least one of said epoxide groups being part of said ring, the mole ratio of (b) to (a) .Iadd.epoxide groups to 1-oxa-3-aza-tetraline groups .Iaddend.being in the range of about 0.2 to about 2.