the arm a blade has a portion engaging the arm and a through opening for receiving the clamping member the clamping member is movable to a clamping position to clamp the blade to the arm application_number US 39662299 A description fig1 of the drawings depicts the fan assembly of an embodiment of the present invention which assembly is referred to in general by the reference numeral 10 and which includes a housing 12 connected to a ceiling of a building by a mounting rod 14 it is understood that the mounting rod 14 is connected to the ceiling in any known manner and that electrical conductors extend from an electrical box not shown mounted to the ceiling through the rod and into the interior of the housing 12 a conventional electrical motor is provided in the housing 12 that includes a stator not shown and a rotor that includes an end casing 16 that protrudes downwardly as viewed in fig1 through an opening in the lower surface of the housing five mounting arms one of which is shown by the reference numeral 20 are mounted to the end casing 16 this mounting can be in any conventional manner or in the manners disclosed in patent applications ser nos 097 623 196 798 243 253 or 334 976 these applications are assigned to the assignee of the present invention and their respective disclosures are incorporated by reference five elongated blades one of which is.