GB1106553A - Illuminated globe used for educational purposes - Google Patents

Abstract

1,106,553. Globes. A. D. WESTENRA. 15 June, 1965 [22 June, 1964], No. 25264/65. Heading G5G. A device for showing the overhead position of the sun and the area of a planet subject to daylight and darkness at any time of the year comprises a translucent globe formed by two portions, having therein a coloured bulb 7 attached to an arm 5 on the other end of which is mounted a hollow hemisphere 4. The arm is pivotable in a vertical plane about pivot 6. The bulb is positioned in a housing comprising a shroud 9 and a lens 8, so that a spot of light representing the overhead position of the sun will be shown on the globe. The globe is rotatable about axis 2 either manually or by an electric motor 22 driving a friction wheel 23 which engages the surface of the globe. The arm 5 is weighted by a counter weight 12, and the position of the arm can be varied by actuation of a slide 14 attached to one end of a cable 13. Plate 15 (Fig. 4, not shown) has marked thereon the months of the year so that positioning the slide adjacent a particular month will result in the correct overhead position of the sun being indicated. The device also includes a fixed ring 30 which is calibrated to indicate time and the motor is preferably arranged to rotate the globe once every twenty-four hours. The ring may also be rotatable about the axis. In an alternative arrangement (Fig. 3 (not shown)) there is no shroud and the light from the bulb is concentrated by a lens and a drive motor is contained within the globe. The pivotal movement of the hemisphere is effected by linkages. Alternatively the movement of the hemisphere may be effected mechanically via gearing and the motor 22 or by a second motor.