I agree completely !! Gianni Ferrari
2009/9/27 Willy Leenders <willy.leend...@pandora.be> > An impressive and sophisticated mechanism as solution that (hardly) > nobody asks for a problem that (hardly) nobody has. > A sundial that indicates the civill time, gives you no more information > than you've already on your watch. A sundial that indicates the real time, > the solar time, is easy to read without corrections and gives you > information that you do'nt have. > Its challenge is that it incites to reflect about the difference between > civil time and reall time. > > Willy LEENDERS > Hasselt in Flanders (Belgium) > > www.wijzerweb.be > > > > Op 27-sep-2009, om 6:48 heeft Robert Bargalló het volgende geschreven: > > > > ---------- Forwarded message ---------- > From: Robert Bargalló <bargallorob...@gmail.com> > Date: 2009/9/17 > Subject: Direct reading time. > To: Robert Bargalló <bargallorob...@gmail.com> > > > Hello All, > When an inexperienced person examine a well constructed Sundial, often > underestimate the instrument because it is not marking the official time and > having to make some “antipathetic” corrections of the indicated time. That > is the main reason we have built a sundial that gives civil time accurately, > enough to adjust the minute a non solar clock that it has stopped. In a > word, in our quadrant needless resort to the equation of time or to the > local position versus the Meridian corresponding to the time zone. No > arithmetic corrections are needed. > Descriptively, the device is a horizontal sundial with a gnomon consisting > in thin thread nylon. The mechanism presents a 48 teeth gear, powered by an > endless screw, which allows the entire clock to rotate some degrees around > an axis parallel to the Earth rotation axis (around the gnomon). In other > words, the mobile set plays like a hypothetical sundial indicating the exact > civil time is elsewhere, in another position but in the same geographic > parallel. As to the accuracy, the quadrant presents marks of all the minutes > from the 5 h 45 a.m. until the 8 h 15 p.m. The single need featuring the > device is that one or twice a week requires adjusts a rotatable knob to > indicate the current date. This disc, of course, acts on the endless screw > and, for that reason, on the rotation. > Really, the rotation movement compensates not only the equation of the > time, but also the error caused for the geographic longitude position of the > instrument. > For the same method we can use the sundial giving 3 types of time: the > local solar time, the standard time, or the daylight savings. > Since we installed it, from November 2006 to date, it has indicated time > with an error that in no case exceeded one minute. > Happy Dialling! > > > Robert Bargalló > More information at next > blog<http://totdestriant.blogspot.com/2008/05/rellotge-de-sol-til.html> > > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial > > > > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial > > > -- Mail to : gfme...@gmail.com Lat. 44;38,18.5N Long. 10;56,05.3E
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