Abstract: The present invention concerns an apparatus and process for producing an improved extruded plastic material product which consists of an inner foamed thermoplastic cellular core and an outer non-porous thermoplastic skin extending along at least one side of the core. In the process, a foamable thermoplastic material is extruded through a first die outlet to produce a foamed thermoplastic material. After exiting the die outlet, a film of non-porous thermoplastic material is applied along at least one side of extruded foamed material. Next, the extruded foamed material and the non-porous film is fed through a forming die which shapes and seals the materials into the desired cross-sectional shape.

Abstract: An impact vibrator for electrostatic precipitators and the like having a vibrator means interconnected in coaxial alignment with a mounting means adapted to receive a conventional rod member, the mounting means being interconnected to the vibrator whereby relative movement therebetween is restricted in the axial direction while permitting relative rotational movement therebetween about the axis. In a preferred embodiment, the vibrating piston disposed within the vibrator means directly engages a portion of the mounting means also disposed within the vibrator during the impact stroke.

Abstract: Securing a decorative and protective trim strip or molding along an exposed edge of an automotive vehicle body as, for example, an outline molding around a wheel well opening. A resilient strip having the desired decorative configuration and appearance is adhesively secured along the edge of the sheet material of the body, and spring clips having a cross sectional configuration complementary to that of the resilient strip are placed over the strip and flange of the sheet material in areas where excessive stress may occur, such as at least at the ends of the strip. The clips insure that the adhesive layer of the strip will remain in engagement with the vehicle without the necessity of fasteners piercing the sheet material.

Abstract: There is described a method of separating an asparaginase rich fraction from a thermophilic microoganism and then to divide this fraction into its D- and L-asparaginases. Substantially pure crystals of the D-asparaginase were obtained.

Abstract: The invention relates to a delay fuse having a rate of combustion which is less than or equal to 4 mm/second, characterized in that it has a diameter which is less than or equal to 3 mm and in that it contains a pyrotechnic composition consisting of 25 to 45% by weight of tungsten having a particle size of between 2 and 4 microns, from 45 to 65% by weight of barium chromate and from 8 to 15% by weight of potassium perchlorate.The delay fuse according to the invention, which is provided with a metal sheath, is applied, in particular, in the pyrotechnic systems carried on board space missiles or submarines.

Abstract: A vane for a gas turbine engine comprising a hollow body externally of aerofoil form. The inner surface of the body is provided with confronting grooves, extending in a direction along the length of the aerofoil form, at a location intermediate the leading and trailing edges of the aerofoil form for receiving two inserts. The first insert comprises two perforated panels situated inside a trailing region of the aerofoil form and defining therewith one or more air passages between the insert and the wall of the body. The first insert has portions which engage in the grooves in the wall of the body, and is provided with confronting grooves extending in a direction along the length of the aerofoil form at a location intermediate the leading and trailing edges of the aerofoil form. The second insert comprises a first panel extending across the void in the body, and has edges which engage in the confronting grooves in the first insert.

Abstract: The invention relates to the simulation of an aircraft's flight controls and particularly the mechanical reactions produced on the pilot's controls.The reaction force is produced by a servo-controlled, hydraulic actuator whose piston moves a distance X which is proportional to the deflection of the pilot's control. A servo signal, whose amplitude is proportional to the component of the reaction force depending on the displacement X, is obtained by digital calculation, filtering and analogue multiplication.The invention can be applied to flight training systems and to artificial feel systems (AFS).