Abstract: A vibration exciter apparatus includes an exciter housing, and two bearing means, each supporting a driven shaft carrying eccentric mass means. The driven shafts carrying intermeshing gears. The exciter housing having an array of bore passages extending from an upper wall to a lower wall of the exciter housing, and a mounting structure plate securable to mineral processing or handling equipment intended to be vibrated by the exciter apparatus. Each of the bearing means and the intermeshing gears having separated lubrication liquid sumps. The exciter housing further having the mounting structure plate with an array of fastener receiving zones, whereby elongated fastener means can pass through the bore passages from the upper wall to be engaged in the fastener receiving zones.

Abstract: A vibration exciter apparatus includes an exciter housing and at least one bearing means supporting at least one driven shaft carrying eccentric mass means. The exciter housing has an array of bore passages extending from an upper wall of the exciter housing to a lower wall of the exciter housing and a mounting structure plate securable to mineral processing or handling equipment intended to be vibrated by the exciter apparatus. The mounting structure plate includes an array of fastener receiving zones, whereby elongated fastener means can pass through the bore passages from the upper wall to be engaged in the fastener receiving zones.

Abstract: An exciter apparatus includes an exciter housing and at least one bearing means supporting at least one driven shaft carrying eccentric mass means. The exciter housing includes an array of bore passages extending from an upper wall of the exciter housing to a lower wall of the exciter housing. A mounting structure plate is securable to mineral processing or handling equipment intended to be vibrated by the exciter apparatus. The mounting structure plate has an array of fastener receiving zones, whereby elongated fastener means can pass through the bore passages from the upper wall to be engaged in the fastener receiving zones. The exciter apparatus further includes a pair of bearing members supporting a pair of driven shafts having intermeshing gears. Each of the bearing members and intermeshing gears have individual liquid lubrication sump zones separate from one another, and cooling means for cooling moving parts of the exciter apparatus.

Abstract: The specification discloses a fastener assembly (10) having a bolt stud or pin (13) with a threaded section (15) at one end, a nut member (11) threadable onto the threaded section (15), the fastener assembly (10) further including a cup shaped cover member (30) with a continuous wall structure having an internal surface defining an internal space (42), the continuous wall structure having an open mouth region (33) with a seal zone (35) and a continuous seal member (32), the internal surface (43, 44) of the cover member (30) having first snap-in formations (45) cooperating with second snap-in formations (48) on an outer surface region of the threaded nut member (11) to prevent disengagement of the cover member (30) from the nut member (11) and to press said continuous seal member (32), in use, against a sealing region around said nut member (11) to thereby prevent ingress of contaminants and corrosive materials into the internal space (42).

Abstract: Protection apparatus for protecting a photovoltaic solar energy receiver from overheating due to concentrated solar radiation reflected from mirrors towards the receiver, the protection apparatus comprising: a shield arranged to move between a stowed position out of a path of solar radiation onto the receiver and a shielding position in the path of solar radiation, unless restrained in the stowed position; and a restraint mechanism for restraining the shield in the stowed position.