US 12,435,976 B2
Multiple angle verification measuring apparatus
Jonathan Duane Robinson, Hanover Park, IL (US)
Filed by Jonathan Duane Robinson, Hanover Park, IL (US)
Filed on Dec. 27, 2024, as Appl. No. 19/002,954.
Prior Publication US 2025/0137780 A1, May 1, 2025
Int. Cl. G01C 9/12 (2006.01); G01C 9/06 (2006.01)
CPC G01C 9/12 (2013.01) [G01C 9/06 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An angle measuring apparatus comprising:
a housing comprising a circular aperture, and a rectangular slot positioned such that a length of the slot is in parallel with the circular aperture;
a rotating assembly comprising a weight, positioned within the circular aperture and operative to rotate, with the weight maintaining the position of the rotating assembly with respect to the housing as the housing is moved angularly with respect to a reference position, such that the weight position indicates the direction of gravity; and
a transparent insert, comprising indicia for indicating measurement angles, the transparent insert operative to be removably inserted into the rectangular slot such that the indicia are superimposed over the rotating assemble and operative for use as reference indicia as the rotating assembly rotates.