Abstract: A system for monitoring the wear state of a carbon brush of a brush holder assembly in which the length of the carbon brush is diminished from an initial length as an end of the carbon brush wears away during use. The system includes a wear state monitor, including a sensor, coupled to the carbon brush. The wear state monitor is configured to rotate as the length of the carbon brush diminishes. The sensor is configured to measure an angular displacement of the wear state monitor as the wear state monitor rotates. The measured angular displacement of the wear state monitor correlates to an amount of diminution in the length of the carbon brush.

Abstract: A control display assembly includes a digital display for generating graphic features that represent vehicle system operating parameters and functions that are selectable by an operator. A plurality of buttons are spaced apart from the display and are associated with one of the graphic features generated by the display through a corresponding light path. The light path extends between one of the buttons and a corresponding graphic feature to provide a visual association between the button and the graphic feature generated by the display.

Abstract: The invention provides an electrical distribution system for skirting boards having an extruded housing which houses a conductor assembly so as to form a longitudinally extending access channel in which, at any location, a connector plug can be inserted. The conductor assembly has a number of slots in opposite faces and in which in one face bus conductors are located. The width of the slots decrease when the conductor assembly is bent so that the distribution system does not have to be cut at wall corners. The connector plug is rotated through 90 degrees to establish electrical contact.