Abstract: A technique for generating predefined dual tone, multiple frequency signals composed of two non-harmonically related frequency components according to industry standards is disclosed. The frequencies of each tone pair are adjusted within a predetermined tolerance so that their peaks are time coincident within a minimum number of cycles. A sampling frequency for the adjusted frequency tone pair is selected to be synchronized with the occurance of the time coincident peaks of the tone pair. The adjusted frequency tone pair are summed and then sampled at the selected sampling frequency and stored in a table in a digital memory. The digital memory contains a plurality of tables, one for each sampled summed tone pair, and the tables are variable in length being optimized for the summed tone pair stored in the table.

Abstract: The addition of at least one anti-haze agent selected from the group consisting of saturated fatty acid amides, unsaturated fatty acid amides, unsaturated fatty acid amides, tertiary alkanolamines, hydrocarbyl sulfates and alkyl benzene sulfonates to a nitrite-containing copolymer of a conjugated diene and a monovinyl-substituted aromatic hydrocarbon monomer provide novel compositions which give reduced haze formation when subjected to molding conditions.

Abstract: A telephone illumination circuit includes a light emitting means and current control means connected in series with the light emitting means across the telephone line. The current control means is adapted to maintain high AC impedance over the entire range of AC and DC operating voltage to protect the quality of AC voice signals on the telephone line.

Abstract: A method for treating polymers of ethylene which have been stabilized with hindered phenolic stabilizer to reduce the discoloration produced upon processing the stabilized polymer at elevated temperature wherein before completion of the processing at elevated temperature there is admixed with the stabilized polymer compositions at least one compound chosen from the group consisting of aliphatic hydroxy compounds and epoxy-containing compounds. In a preferred embodiment, the polymer of ethylene and aliphatic hydroxy compound are further admixed with water. In another embodiment of the invention the aliphatic hydroxy compounds contain from 1 to 4 hydroxyl groups and are water soluble.A treated polymer of ethylene stabilized with hindered phenolic stabilizer that has been admixed with a compound chosen from the group consisting of aliphatic hydroxy compounds and epoxy-containing compounds.

Abstract: Glycerides of higher fatty acids have been found to be effective as a discoloration inhibitor in very low concentrations for polyolefins.

Abstract: Ultraviolet light stabilizer combinations for polymeric materials are provided by mixing zinc oxide, a zinc dihydrocarbyldithiocarbamate and a nickel compound selected from the group consisting of nickel dikydrocarbyldithiocarbamate, a nickel phosphonte and a nickel amine complex of 2,2'-thio-bis(p-alkylphenol). Also provided are stabilized polymeric compositions comprising solid polymers of 1-olefins and the above stabilizer combinations.

Abstract: The addition of a minor amount of distearyl pentaerythritol diphosphite to olefin polymers containing 2-hydroxy-4-n-octoxybenzophenone as the ultraviolet stabilizer increases the ultraviolet resistance of the polyolefins. Olefin polymers containing these stabilizers can be used in the production of items that will be brought into contact with food products.