Optical instrument line of sight aligning device

Abstract

A line of sight aligning device for use with an optical instrument having a viewing opening requiring precise alignment with the line of a sight of the viewer. The device comprises a body member having an eye opening and nose recess in operative position relative to each other. Positioning means position the body member relative to the optical instrument with its eye opening aligned with the viewing opening of the optical instrument. On the front face of the body member, above the nose recess, is a straight edge positioned within the field of vision of the viewer and disposed substantially at right angles to the longitudinal axis of the nose recess in the body member. A pad member, preferably integral with the straight edge, also is positioned in both the nose recess for use as a head rest by looking through the eye opening of the device into the viewing opening of the optical instrument while positioning his head in such a manner that the straight edge is substantially normal to the longitudinal axis of his nose, the viewer is enabled to align his line of sight precisely with that required for proper use of the optical instrument.

Dependencies are inferred from the claim text.