Multi scale dial with edge pointer - has concentric ring dials supported at three points with pointer extending underneath

摘要

The dial pointed extends under the dial to the edge where it turns through 180 degrees to indicate on the upper surface. A number of concentric ring dials are separated by a small space, and indicate various scales such as hours and minutes on the main dial. Each ring dial that displays a particular function, which is indicated on its upper surface, is welded or otherwise attached at three points to form a plane surface. internal or overhead lighting may be employed to illuminate the dial and pointer and make the scales easier to read.