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: A light fitting comprising: a first part for connecting to a surface, the first part comprising: a first electrical connector; and a first mechanical connector; a second part for connecting to a light, the second part comprising: an electrical interface configured to be releasably coupled to a power circuit for a light; and a second electrical connector, the second electrical connector being arranged to be electrically connected to the electrical interface for supplying power to the light; and a second mechanical connector arranged to releasably engage the first mechanical connector. The first electrical connector and second electrical connector are arranged to engage to provide an electrical connection between the first and second parts as the first and second mechanical connectors engage. The light fitting is arranged such that an electrical connection between the first and second parts can be provided when the second part is at any of a plurality of positions relative to the first part.