Astronomical apparatus of popularization for the identification of stars
FRENCH REPUBLIC Industry and commerce Patent service of invention iNTELLECTUAL INDUSTRIELLE of the Gr. 12.-Cl. 3. [...] 985,280 -. N Apparatus astronomical popularity for the identification of the stars. M. Guillaume-Jean-Pierre [...] residing in France (Herault). Demanded 20 April 1949, -Issued 7 March 1951. An instrument called " [...]" for indicating automatically, by direct reading, the name of a star or constellation to which is directed the viewfinder. The apparatus adapted for astronomical popularity allows the more layperson Teaches all constellations and identify the stars intothe press a button in order to be presented as soon, in a light emitting display the name of the star considered. It is not necessary to know the latitude of the place, nor the day and time or observation; a single sight is sufficient. Principle It has for the use of the curvature of a spherical surface for supporting a sight which is moved tangentially to the ball which may be directed to any point of the sky. There is while there is a relationship between the target and the pro * from this point on the surface of the sphere. l ° ' A right angle A, B, C (fig. 1) whose sides are tangent to a circumference 0 intercepts thereon an angle of 90°. 2° If the displacing the angle on the circumference so as to bring the line A-B towards a point Z located at infinity, the radius OC parallel thereto, will also be directed to that point 2. 3° If the eye of an observer can fit the center of the small sphere 0 (fig. 2) assumed transparent material, and that it fixes a star E from the sky, its line of sight through the sphere at a point C. C Let us apply at that point one of the sides of the right angle A-B-C of Figure 1, the tangent A-B will also directed to the star E. Therefore, it is possible to use the line A-B as a viewfinder to a star and writing the name of the star on the sphere, the point of tangency C, with the proviso that the [...] A-B-C moves still on the plane of a great circle. To this end, the sight A-B (made at need by a simple ' tube with pinnule a) is 30 to 11 11m, to Montpellier. Published 17 July 1951. attached diametrically on the upper plane of a right cylinder H (fig. 3) its axis is perpendicular to the axis of the cylinder. By applying the base of the cylinder on the sphere, its intersection determines a spherical segment If be attached to the base of the cylinder, on a generator in the same plane as the viewfinder, a bent shaft of an arc of a circle of 90 °, the end of this rod will indicate on the sphere the point of tangency C the second side of the right angle. C Thus the point will correspond to the point of the sphere through which the line of sight of the observer. It is assumed an observer located inside the sphere O (fig. 4) from which it sees the heavens 1, 2, 3, 4 in the order from left to right. It be indicating on the sphere by the points The celestial sphere use with this [...] must be specially established to accommodate the feature. Implementation: A sphere translucent material is made luminous by a small electric bulb housed therein. It port is provided on a T which serves as an axis of rotation. Within the tubing is housed an electric battery P (fig. 5) that supplies power to the lamp L fixed at its end. N A contact button activates the illumination of the sphere. The constellations are written on the sphere in the reverse order as hereinbefore- 1° In the idea of using the curvature of a spherical surface for guiding a viewfinder and use the relationship which exists between the intended spot in the sky and the projection of that point on the sphere; 2° In creating a celestial sphere on which the constellations are in the reverse order which they assume in the sky with the indicia written upside down. Guillaume-Jean-Pierre G LIE N, street. of Toulouse, 10. Montpellier (Herault]. For the sale of the fascicles, be directed to [...] Nationale, 27, the street Convention, Paris (15e). Ministry