| 摘要 |
An angle indicator is provided for measuring an angle of inclination of a structure with respect to a plane, such as a horizontal or vertical plane. The angle indicator includes a housing adapted and configured to be mounted to the structure, an indicator movably disposed in the housing having an ang ular range of motion about an axis intersecting the plane, and indicia provi ded on the housing for indicating proper angulation of the structure with re spect to the plane. The indicia can be defined at least in part by a first a rcuate segment, wherein the indicia and the indicator are configured to be i n visual alignment to an observer when the angle of inclination of the struc ture with respect to the plane achieves a predetermined angle. In accordance with a preferred embodiment of the invention, the predetermined angle can b e about thirty degrees.
|
