Using "Google Patent" to find Sundial Patents.
Hi all, Was having a look at Google Patents using the key word "sundial" and found a number of interesting sundial patents. Below is one that I thought was an interesting patent: Combination lawn/garden ornament and cremation container http://www.google.com/patents?id=JrwEEBAJ&printsec=abstract&zoom=4 You may also like to do your own patent search at Google Patents, just enter your key word at the top and click the "Search Patent" button. Regards, Roderick Wall.--- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: R: Italian hours
Hi Gianni, Yes, I believe time to sunset is a great type of dial usage. As you say, watches don't do it. Some types of aircraft are required to be on the ground a certain time before sunset and certain airports have sundials for that purpose. I just enjoy it as it gives me a good idea of how much time I have left to work outdoors without lights. It does wow casual viewers too! For some folk it tells them how much time left in the day. I've started several new dials for that purpose, but before I finish, someone comes up with a newer dial design to do it, so off I hare in that new direction. I've inherited some good materials for the purpose, so, soon. Thanks for the info. Edley. > After the invention and the diffusion of the first bell tower clocks > (1300-1400) the equal hours began to be used in Europe as a substitute > for the unequal hours , used since the antiquity (for more than 1700 > years!). While previously the beginning of the day was fixed at dawn > or at sunset (Islam), with the new hours the beginning of the day, > that is the moment from which to count the hours (hour 0) , was > fixed in different ways in the different countries, in the instant > of a peculiar observable astronomical phenomenon (at dawn, noon, > sunset or midnight). In Italy my ancestors chose the instant of the > sunset ( that is more easily observable of dawn and also of noon). > The regulators of the clocks ( temperatori -as Frank King :-) ) > could easily set their tools observing the disappearance of the solar > disk. For this reason the Italian hours (in Latin Italic) begun to > be counted from sunset (hour 24). In Italy we have a saying that > tells "portare il cappello sulle 23" (to wear the hat on the 23) > to point out that a person wear the hat with the brim folded down to > protect his eyes from the Sun, as it is necessary to do before sunset > (23h = 1hourbefore sunset) The Italian hour ware abandoned in > the first half of the XIX century. > > Today it´s enough a look to our wristwatch to > know the time, while almost nobody knows when the Sun sets (also > because with the standard time the calculation is not easy). For > this reason some persons built sundials with the hours missing to > sunset. > > I always recommend them, also because as soon as a person > looks at a common sundial, he also looks immediately at his > wristwatch and, shaking his head, often makes bitter considerations > on the planner that has not succeeded in making an exact sundial! > > The sundials with hours to sunset are obviously sundials with > Italian hours - that only dialists know :-) - in which we have > written the values of the complements from 24 . > > Best wishes > Gianni Ferrari > > P.S. - One of the first clocks with equal times is that painted by > Paolo Uccello (Duomo Santa Maria del Fiore- Florence) : see in http: > //www.wga.hu/frames-e.html?/html/u/uccello/3florenc/3clock.html > > > > >Messaggio originale > >Da: [EMAIL PROTECTED] > >Data: 7- > mag-2007 12.36 > >A: "sundial List"<[EMAIL PROTECTED]> > >Ogg: > Italian hours > > > >Italian hours are counted from sunset. One has to take > its complement > >from 24 to know the time left until suntime. > >Why > sundials with Italian hours do'nt indicate directly the result of > >this calculation? Is there a practical or historical reason? > >Willy > LEENDERS >Hasselt in Flanders (Belgium) > > > >--- > >https://lists.uni- koeln.de/mailman/listinfo/sundial > > > > > > --- > https://lists.uni-koeln.de/mailman/listinfo/sundial > --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Italian hours
Could you not, just as logically, ask why clocks, watches and normal sundials don't indicate directly the time left until midnight? Chris Lusby Taylor 51.4N, 1.3W - Original Message - From: Willy Leenders To: sundial List Sent: Monday, May 07, 2007 11:36 AM Subject: Italian hours Italian hours are counted from sunset. One has to take its complement from 24 to know the time left until suntime. Why sundials with Italian hours do'nt indicate directly the result of this calculation? Is there a practical or historical reason? Willy LEENDERS Hasselt in Flanders (Belgium) -- --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Irish Maker
Hi Tony, From the forthcoming Second Edition of Jill Wilson's Biographical Index of British Sundial Makers from the Seventh Century to 1920 we have: SEWARD John A Dublin mathematical instrument maker, known to have made ring dials. Apprenticed to Gabriel Stokes in 1715, John Seward was working on his own account at least to 1740 and perhaps 1750. A mechanical universal equinoctial dial is in the National Museum of Dublin (No. 578-1910) and another has been listed in a sale catalogue. A ring dial is also understood to be in a private collection. Sources: i) Clifton, p.248. ii) V & M, pp. 4, 134. ++ Does this sound like your man? I can look up the Sources if you haven't got them. Jill and I would be grateful for details to add to the database, please. Regards, John Davis --- Tony Moss <[EMAIL PROTECTED]> wrote: Fellow shadow Watchers, I've been asked to reproduce an Irish dial but the florid engraving has deteriorated in places. It may possibly be 'Seaward DUBLIN 1750'. Can anyone throw light on this please/ Tony Moss Lindisfarne Sundials. --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Irish Maker
Fellow shadow Watchers, I've been asked to reproduce an Irish dial but the florid engraving has deteriorated in places. It may possibly be 'Seaward DUBLIN 1750'. Can anyone throw light on this please/ Tony Moss Lindisfarne Sundials. --- https://lists.uni-koeln.de/mailman/listinfo/sundial
R: Italian hours
After the invention and the diffusion of the first bell tower clocks (1300-1400) the equal hours began to be used in Europe as a substitute for the unequal hours , used since the antiquity (for more than 1700 years!). While previously the beginning of the day was fixed at dawn or at sunset (Islam), with the new hours the beginning of the day, that is the moment from which to count the hours (hour 0) , was fixed in different ways in the different countries, in the instant of a peculiar observable astronomical phenomenon (at dawn, noon, sunset or midnight). In Italy my ancestors chose the instant of the sunset ( that is more easily observable of dawn and also of noon). The regulators of the clocks ( temperatori -as Frank King :-) ) could easily set their tools observing the disappearance of the solar disk. For this reason the Italian hours (in Latin Italic) begun to be counted from sunset (hour 24). In Italy we have a saying that tells “portare il cappello sulle 23” (to wear the hat on the 23) to point out that a person wear the hat with the brim folded down to protect his eyes from the Sun, as it is necessary to do before sunset (23h = 1hourbefore sunset) The Italian hour ware abandoned in the first half of the XIX century. Today it’s enough a look to our wristwatch to know the time, while almost nobody knows when the Sun sets (also because with the standard time the calculation is not easy). For this reason some persons built sundials with the hours missing to sunset. I always recommend them, also because as soon as a person looks at a common sundial, he also looks immediately at his wristwatch and, shaking his head, often makes bitter considerations on the planner that has not succeeded in making an exact sundial! The sundials with hours to sunset are obviously sundials with Italian hours - that only dialists know :-) - in which we have written the values of the complements from 24 . Best wishes Gianni Ferrari P.S. - One of the first clocks with equal times is that painted by Paolo Uccello (Duomo Santa Maria del Fiore- Florence) : see in http: //www.wga.hu/frames-e.html?/html/u/uccello/3florenc/3clock.html >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 7- mag-2007 12.36 >A: "sundial List"<[EMAIL PROTECTED]> >Ogg: Italian hours > >Italian hours are counted from sunset. One has to take its complement >from 24 to know the time left until suntime. >Why sundials with Italian hours do'nt indicate directly the result of >this calculation? Is there a practical or historical reason? > >Willy LEENDERS >Hasselt in Flanders (Belgium) > > >--- >https://lists.uni- koeln.de/mailman/listinfo/sundial > > --- https://lists.uni-koeln.de/mailman/listinfo/sundial
AW: Italian hours
Dear Willy Leenders, may I recommend besides all the brilliant answers you will get now from others Johann Wolfgang von Goethes brilliant essays about italic hours, - the one published in 1788 in Der Teutsche Merkur vom Jahre 1788 - and the second one including fine drawings published in Die Italiänische Reise. I have written an article about Goethes essay in Der Teutsche Merkur in DGC-Mitteilungen Nr. 108 (Winter 2006) which is still available for free download at HYPERLINK "http://www.dg-chrono.de/"www.dg-chrono.de . About Goethes second essay I will publish an article in DGC-Mitteilungen Nr. 111 (Autumn 2007). Best regards, Reinhold Kriegler * ** *** * ** *** Reinhold R. Kriegler Lat. 53° 6' 52,6" Nord; Long. 8° 53' 52,3 Ost; 48 m ü. N.N. http://www.sundials.ru/frankfurt.html -Ursprüngliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Willy Leenders Gesendet: Montag, 7. Mai 2007 12:36 An: sundial List Betreff: Italian hours Italian hours are counted from sunset. One has to take its complement from 24 to know the time left until suntime. Why sundials with Italian hours do'nt indicate directly the result of this calculation? Is there a practical or historical reason? Willy LEENDERS Hasselt in Flanders (Belgium) No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.467 / Virus Database: 269.6.5/792 - Release Date: 06.05.2007 21:01 No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.467 / Virus Database: 269.6.5/792 - Release Date: 06.05.2007 21:01 --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Ferguson Dial - London Science Museum.
Fellow Shadow Watchers, As many will know I'm slowly recovering from computer failures so may have missed contributions to the SML. The Mr. Ferguson responsible for the meantime dial in the South Kensington Science Museum was probably of Scottish extraction but lived in Eindhoven, Holland. Fer de Vries, to whom I am indebted for this information had extensive contacts with his son and the sundial/s some years ago. Tony Moss. --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Italian hours
Italian hours are counted from sunset. One has to take its complement from 24 to know the time left until suntime. Why sundials with Italian hours do'nt indicate directly the result of this calculation? Is there a practical or historical reason? Willy LEENDERS Hasselt in Flanders (Belgium) --- https://lists.uni-koeln.de/mailman/listinfo/sundial
ferguson's book
Greetings Edley, Gianni and fellow dialists, In 1816 Robert Stephenson, aged thirteen, did the calculations for the dial still standing on the Stephenson cottage in Killingworth, Northumberland. Ferguson's "Astronomy" obviously existed at that date. Robert's own account reads: "We got a Ferguson's "Astronomy" and studied the subject together. Many a sore head I had while making the necessary calculations to adapt the dial to the latitude of Killingworth. But at length it was fairly drawn out on paper, and then my father got a stone, and he hewed and carved, and polished it, until we made a very respectable dial of it." You will recall that George Stephenson was the famous railway engineer and his son, Robert, followed him. Frank 55N 1W Edley McKnight wrote: >Dear Gianni, > >Thanks very much for the hint regarding dialing resources on "Google >Books"! > >Quite a few of the full view, downloadable, books in pdf format have at least >chapters on dialing. In the mid 1800's it appears that many colleges and >universities included dialing as a subject within their mathematics >curriculum. >There are mathematics books by a Ferguson, for instance, that include >dialing from around the 1850's. Could this be the Ferguson that some of you >have been searching for? > >The idea of making a dial point whatever which way in order to either include >a fixed set of hours, or to be fully visible from a particular location ( Like >the >bell ringer or the administration offices. ) sounds really cool! > >Thanks again, > >Edley McKnight > > > -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.467 / Virus Database: 269.6.5/792 - Release Date: 06/05/2007 21:01 --- https://lists.uni-koeln.de/mailman/listinfo/sundial
