Abstract: A thermally controlled diffuser comprises a means for connecting the diffuser to a duct, a divergent outlet, a means for deflecting flow from the divergent outlet, and a means for supporting the flow deflection means in a predetermined positional relationship with respect to the divergent outlet. The support means includes a temperature sensitive mechanism whereby the predetermined positional relationship between the outlet and the flow detection means may be varied depending on a temperature sensed by the temperature sensitive mechanism so as to produce a variation in the outlet flow pattern of the diffuser. The thermally controlled diffuser may preferably be a ceiling diffuser, and preferably the variation in the positional relationship is in a vertical direction when the diffuser is installed. A method of automatically varying the flow pattern of a diffuser is also described.

Abstract: A clip device for locating an object such as a diffuser in an aperture in a panel comprises a mounting member, a pivotal member, a spring for retaining the pivotal member in either of a first position and second position, and an actuating device comprising a rod and lug whereby the pivotal member can be moved form the first position to the second position. The rod is moveable between an operative condition wherein an end protrudes so as to contact the ceiling panel during insertion of the diffuser in the aperture, and an inoperative condition wherein the end is retracted. The clip can thus be selectively set so as not to operate when the diffuser is installed in the aperture.