cooperate with a lighting globe member 14 having a globe member cylindrical flange 15 received within the cylindrical support flange 12 in a coaxially aligned relationship a cylindrical gasket assembly 16 is provided having a predetermined internal diameter substantially equal to the globe member cylindrical flange outer diameter for receiving fastening screws 13 in a vibration free relationship between the globe and the fan construction to prevent withdrawal of the screws 13 during use of the fan structure the fig4 8 illustrate a modified gasket assembly having an outer resilient polymeric sheath 17 encasing a central metallic stiffener cylindrical band 18 the gasket assembly 16a further is defined by a band cylindrical outer wall 19 coaxially aligned with a concentric band cylindrical inner wall 20 a cylindrical fluid adhesive band 21 is contained between the metallic stiffener cylindrical band 18 and the band cylindrical inner wall 20 with a plurality of fluid delivery ports 22 projecting through the cylindrical inner wall 20 to the adhesive band 21 a sealing membrane 23 is positioned within each delivery port 22 in a sealing relationship in adjacency to the adhesive band 21 in a substantially contiguous relationship rupturing of the membranes 23 are effected upon flexure of the sheath 17 by directing the fastening screws 13 into the modified gasket assembly 16a.