Angle indicator

Abstract

An apparatus and method for indicating an angle of an article to a user. The apparatus comprises a casing having a mounting surface adapted to be securable to an article, the casing having a cavity therein defining a cavity volume, the cavity having an axis extending normal to the mounting surface, a quantity of a fluid selected to have a volume equal to substantially 50 percent of the cavity volume contained within the cavity and at least one angle indicator applied to an exterior surface of the casing around the cavity, at a position selected to align with a free surface of the fluid when the article is arranged at a desired angle, the at least one angle indicator arranged annularly around the axis. The method includes securing the apparatus to the article and orienting the article to a desired angle such that the one angle indicator is aligned with a free surface of the fluid.

Dependencies are inferred from the claim text.