Abstract: Disclosed is a low toxicity aprotic alkyl amide solvent system used for the manufacture and application of polyamideimide resins, and an efficient method for manufacturing the polyamideimide resins in a solvent system in a single reaction with distillation which allows recycling of intermediate streams. The solvent system can be used for either the manufacture or the dissolution of polyamideimide resins.

Abstract: Disclosed is a low toxicity aprotic alkyl amide solvent system used for the manufacture and application of polyamideimide resins, and an efficient method for manufacturing the polyamideimide resins in a solvent system in a single reaction with distillation which allows recycling of intermediate streams. The solvent system can be used for either the manufacture or the dissolution of polyamideimide resins.

Abstract: A telephone set includes a telephone component and a base component supporting the telephone component at a plurality of angles. The two components have nested curved portions allowing mutual angulation while maintaining the nested relation, thus allowing the telephone component to swing through a range of angulation with respect to the base component. The set includes a retention device for maintaining the portions in nested relationship, and a locking device for releasably securing the two components in any one of the plurality of mutual angulations.

Abstract: An electronic circuit board enclosure comprised of a planar member having dimensions at least equal to dimensions of the circuit board, first pillars fixed to at least one side of the planar member and extending orthogonally to the planar member above the planar member, apparatus for aligning and fixing bottoms of second pillars of another circuit board enclosure to tops of the first pillars, apparatus for fastening a first circuit board to and above the planar member, and locating apparatus for precisely locating the fastening position of the circuit board to the planar member relative to the first pillars, whereby the position of the first circuit board can be located precisely relative to another circuit board fastened to another circuit board enclosure.