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Bill GottesmanPrecision Sundials LLC
Renaissance Focusing Sundial
A “Watch” accurate dial using Focused Light
Notable Features
• Modified Equatorial Dial• Scale is Expanded• Uses Focused Light• Adjustable for Latitude, Eot,
and Daylight Savings• Software assists alignment• C. M. Lowne in BSS Bulletin
98.1 independently reported similar idea for focusing sundial.
• US Patent 6,301,793
Modified Equatorial Dial
•Equatorial Circle is expanded into a helix to increase its rigidity.
•Readable on Equinoxes
•Helix connotes the passage of time
New Developments• Focused beam is 2 minutes of time wide. Can this be made
narrower to allow a more precise reading?• Not with the beam itself, but…
• By casting two beams adjacent to each other, the space between them can act as a cursor, and be made as narrow as one desires, even to just a few seconds of time.
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