True north meridian indicator - has apertures in inclined and arcuate plates to receive weighted string having latitude scale juxtaposed

摘要

A horizontal base plate (1) has connected to it an inclined plate (2) at a selected ange(p). Upon the inclined support plate (2) is mounted an axle (A) which rotatably supports a hourly graduated arcuate plate (4). The hour graduations on the left side of plate (4) represent time in the afternoon and similar hourly graduations on the right side of the plate (4) represents time in the morning. A rectangular style plate (5) is mounted on the inclined plate (2) at a selective angle (q) relative to the inclined plate (2). The left edge (5a) of the style plate (5) when pointed towards the celestial pole casts a shadow to indicate time on the left hourly graduations on the arcuate plate (4).