bracket 5 extends via an elongate body 6 to a fan mounting head 7 the mounting head 7 is a substantially u201c c u201d shaped bracket having outer arm portions 8 and 9 enclosing a supporting web portion 10 there between again mounting head 7 is substantially of known type engaged with the mounting head 7 are three mounting posts 11 which are illustrated in more detail in fig6 one mounting post 11 is located at the distal end of each arm 8 and 9 and the third mounting post 11 is located in the centre portion of the mounting head 7 proximate the elongate body 6 it is advantageous to turn now to the mounting post 11 illustrated in fig6 the post 11 comprise a head portion 12 and body portion 13 connected via a narrow neck portion 14 for reasons that will become apparent later the body portion 13 has a longitudinal length a substantially equal to but no greater than the thickness of fan blades 2 at the distal end of the body portion 13 there is a threaded portion 15 that facilitates engagement of the post 11 with the head 7 of the mounting arm 1 preferably treaded portion 15 is of a standard thread configuration so as to be compatible with known mounting arms 1 a screwdriver slot 16 is provided to allow the posts 11 to be secured to head 7 an additional recessed portion 18 is provided on body 13 adjacent threaded portion 15 when threadably engaged the post 11 secures when surface 17 bears against the periphery of a threaded bore in head.