Hello Bill Gottesman and all the colleges. The design of my direct reading sundial is made from find a gear with a number of teeth multiple of 24 (hours). This gear of 48 teeth, operated by a worm screw, controls the rotation of an axis parallel to the gnomon and therefore of the Earth axis rotation. The entire clock rotates around the aforementioned axis.
Mainly the manufacturing was making in Aluminium by use of a mechanical lathe and a milling machine. The quadrant is a floated glass upon which a special PAPER is attached to withstand weather Board. The replacement of this paper is only required every 2 or 3 years. Now, the clock is installed in my garden; however, I am designing another sundial similar biggest and vertical commissioned by the Mayor of a village of Menorca. This instrument will be placed in a public space.
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