On 24/04/2015 17:00, Robert Kellogg wrote:
Interesting digital dial. I must admit I looked at this design about
20 years ago. The author has one 3D moveable drawing of the completed
dial. If you look closely on the underside of the gnomon, there are
cut-outs of hour numbers that match the obverse side.
Therefore, this sundial works correctly only two days a year (I'm
inferring that the numbers were aligned for the equinox). Pity that
such a beautiful digital dial is nearly useless. Exactly the same
problem with Voshart's digital cube (see
http://gizmodo.com/this-digital-sundial-tracks-the-sun-through-a-laser-cut-1545753402).
This may force me back to the drawing board since I hold US Patent
5,596,5533 Jan 21 1997 "Digital Sundial". (See also Scharstein's US
Patent 5,590,093 Dec 31. 1996 "Digital Sundial". Dan's patent is
earlier, but he had to reference my article in NASS' Compendium).
Ahhhh the modern digital world.
I understand that Apple's digital watches are being delivered to those
few lucky souls today.
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At a time when digital watches are hardly ever seen in the shops.
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Richard Mallett
Eaton Bray, Dunstable
South Beds. UK
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