CASQUILLO

APARATO Y METODO QUE PROPORCIONA LA MEDICION DE LA ASIMETRIA ASI COMO DEL TAMAÑO DE PARTICULAS INDIVIDUALES PRESENTES EN UN FLUIDO. SE UTILIZAN TECNICAS DE DISPERSION DE LASER PARA OBTENER LOS DATOS DE LAS PARTICULAS, LOS CUALES SON ENTONCES COMPARADOS CON DATOS DE CONFIGURACIONES DE PARTICULAS CONOCIDAS PARA INSCRIBIR UN FACTOR DE ASIMETRIA A LAS PARTICULAS. A bush (10) for installation in easily crushed or marred work material (40) such as apertured honeycomb sheet or fibre reinforced plastics material, enables the work material to be secured to a support (70), by means of a nut and bolt, without damage. The bush (10) has a cylindrical body (12) longer than the thickness of the work (40), and a flange (14) for abutting a face (44) of the work at one end of the body. The other end of the body has an annular boss (30) which projects beyond the other face (46) of the work (40), and, peripherally of the boss (30), an annular skirt (28) which during installation can be deformed to provide a retaining flange (60) for engaging the other face (46) of the work. A bolt (76) can then be passed through the bush (10) and a support (70), and secured with a nut (82). Only the bush (10) directly engages the work (40).