GB900685A - Celestial and terrestrial globes - Google Patents

Abstract

900,685. Globes. PATELLA, L. June 23, 1960 [June 29, 1959], No. 21970/60. Class 146 (2). A celestial and terrestrial globe is mounted on an adjustably inclined axis so that wherever the observer is positioned the poles may be aligned with the poles of the celestial sphere; the globe consists of a thin-walled sphere having a celestial chart reproduced on the inner surface and a terrestrial chart reproduced on corresponding co-ordinates on the outer surface. The axis of the globe is mounted on arcuate arms 1b, 8 so that it is parallel with a rectilinear foot 1, provided with a longitudinal line of sight 1d in registry a transparent scale 6. The scale is freely pivoted at 7 so that as the angle of inclination is varied by the mechanism 13, 14 a weight on the scale maintains it in the position shown, but the sight 1d is automatically adjusted to desired position. The globe is constructed in two halves, the arm 8 being pivotal on the rectilinear foot 1 so that it may be moved to position shown in Fig. 12 to reveal the inner surfaces. In accurate globes, the inside is truly spherical and the outside is flatter at the poles by making the shell thinner at the poles than at the equator. A small sphere 17, Fig. 9, representing the earth is mounted on a half axis 5b and is provided with cross-radial bores, so as to provide suspension 19 for an artificial horizon 18. A counterweight 21a on a semicircle 21 automatically adjusts the horizon when the globe is inclined. Artificial satelite orbits may be similarly provided.