Abstract: Apparatus for mounting an object, such as a model airplane, on a support surface such as an upstanding rod. The apparatus includes an elongate rod mounted on an intermediate portion of the model for longitudinal movement to any selected one of a plurality of different positions to adjust the center of gravity and the attitude of the model relative to the support surface.

Abstract: Electrical stunning apparatus for beef cattle or other livestock uses head restraining means to hold the animal's head in place during contact by electrodes. The animal's head is prevented from moving upwardly by a pusher which contacts the top of its head or neck, while a chin lifter moves in from below the animal's head to hold it in place. An electrode on the chin lifter contacts the animal's nose allowing a stunning current to pass through the animal's head to another electrode on the pusher (for head stunning). If deep stunning is required an additional electrode may be moved into contact with the rear of the animal to apply a heart-stopping current.

Abstract: Electrical stunning apparatus for beef cattle or other livestock uses head restraining means to hold the animal's head in place during contact by electrodes. The animal's head is prevented from moving upwardly by a pusher which contacts the top of its head or neck, while a chin lifter moves in from below the animal's head to hold it in place. An electrode on the chin lifter contacts the animal's nose allowing a stunning current to pass through the animal's head to another electrode on the pusher (for head stunning). If deep stunning is required an additional electrode may be moved into contact with the rear of the animal to apply a heart-stopping current.

Abstract: A new article of manufacture in the form of a hollow, biaxially oriented, article such as a container, formed of a composition comprising a copolyamide of hexamethylene terephthalamide and hexamethylene isophthalamide, the ratio of terephthalic acid to isophthalic acid used in forming the copolyamide being between about 1.0 to about 1.9. The article is preferably heat set and optically clear where oriented and can be functionally in hot fill and autoclave food packaging applications.

Abstract: A new article of manufacture in the form of a hollow, shaped, blow molded article formed of a composition comprising a copolyamide of hexamethylene terephthalamide and hexamethylene isophthalamide, the ratio of terephthalic acid to isophthalic acid used in forming the copolyamide being between about 1.0 to about 1.9. Such article may be formed from a precursor in the form of a hollow, shaped, tubular preform formed of such copolyamide composition.

Abstract: Thermotropic polyesters consisting essentially of units derived from diphenols and aromatic dicarboxylic acids are prepared via monocarboxylic acid esters of the diphenols by acidolysis in two steps. The first step is a melt prepolymerization to form a prepolymer of inherent viscosity in the range of 0.12 to 0.16 dl g.sup.-1. The second step is a melt polymerization by a single pass through a wiped film reactor, in which the film of polymer melt is subjected to a high rate of shear and to a temperature in the range within which the polyester forms an anisotropic melt phase. The polyester product has an inherent viscosity of at least about 0.5 dl g.sup.-1.

Abstract: An economical process for continuously producing shaped articles of aromatic oxadiazole or aromatic oxadiazole/N-alkylhydrazide polymers from certain monomer solutions is provided. The process involves continuously feeding monomer solution into a heated, pressurized continuous reactor to provide dope which is continuously extruded into an aqueous medium to provide a shaped article.

Abstract: Dopes from which shaped articles of oxadiazole/N-alkylhydrazide copolymers are provided. The dopes are prepared in a matter of minutes by combining and mixing a slurry of aromatic dihydrazide in aromatic diester with a mineral acid such as oleum.

Abstract: a jig-saw puzzle comprises interfitting pieces (1, 2, 3, 4) which when fitted together side-by-side form a three-dimensional upper surface simulating for example hills and valleys. Each piece is formed of a molded open or closed cell thermoplastics foamed core 7 sandwiched between upper and lower thermoplastics skins 8a and 8b. A printed sheet 9 is stuck on to the upper skin 8a. The skins 8a and 9a may be made from any conventional moldable thermoplastics. A preferred thermoplastics is a copolymer of propylene with from 5 to 20% by weight of ethylene made by injecting ethylene into the final stages of an otherwise propylene homopolymerization. The core may be made of the same or different plastics as the skins. Polyurethane is a preferred core material. The printed sheet, which may be paper or fabric, may be stuck on to the upper sheet with adhesive or by penetration or fusing of the skin material into the sheet during molding of the pieces.