Hi Bob, If you have a look at the Jules Audemars Equation of Time watch movement in my link you will see a kidney piece.
Roderick Wall. From: Robert Terwilliger Sent: Wednesday, June 22, 2011 9:43 AM To: 'R Wall' ; [email protected] ; [email protected] Subject: RE: EoT diagram Roderick, The eot watch your link produced does not seem to be mechanical – hence no kidney piece. Google movement equation of time watch Then try the images Here’s one http://www.breguet.com/var/ezwebin_site/storage/images/equation-of-time/3646-5-eng-GB/Equation-of-time.jpg Bob -------------------------------------------------------------------------------- From: R Wall [mailto:[email protected]] Sent: Tuesday, June 21, 2011 6:06 PM To: Robert Terwilliger; [email protected]; [email protected] Subject: Re: EoT diagram Hi again, This is a good link on EOT and watches http://www.timezone..com/extras/200711101492 Roderick Wall. From: R Wall Sent: Wednesday, June 22, 2011 7:08 AM To: Robert Terwilliger ; [email protected] ; [email protected] Subject: Re: EoT diagram Hi all, After sending my last email. I thought I should have 1st searched the Internet before sending it: http://forums.timezone.com/index.php?t=tree&goto=5710449&rid=0 Note: scroll down to the larger photo. Looks as if the outer EOT ring can be adjusted (turned) to have the current EOT month at the top 12 o’clock position. And there are other “sun” information, what I’m not sure. By the way ChiLan, I think your time scale is the wrong way around. “+” should be “-“ and “-“ should be “+”. Roderick Wall. From: R Wall Sent: Wednesday, June 22, 2011 6:18 AM To: Robert Terwilliger ; [email protected] ; [email protected] Subject: Re: EoT diagram Hi ChiLian and Robert, Thanks ChiLan, your EOT curve is interesting. I suppose anything to do with sundials has a high chance of being invented before as sundials have been around for a long time. Robert, the kidney shape cam in the watch is interesting, is this watch still in production and can it be purchased. I’ve never seen a watch with EOT indication. Thanks, Roderick Wall. From: Robert Terwilliger Sent: Wednesday, June 22, 2011 5:55 AM To: [email protected] ; [email protected] Subject: RE: EoT diagram The equation graph projected on a circle is used as a "kidney piece" cam in a watch movement that can indicate the equation. Here is a picture of the gear carrying the kidney piece. It turns once a year. http://people.timezone.com/mdisher/decorte/gyro2/gyro2_3.jpg Bob -------------------------------------------------------------------------------- From: [email protected] [mailto:[email protected]] On Behalf Of Chiu ?,Chi lian Sent: Tuesday, June 21, 2011 12:11 PM To: [email protected] Subject: EoT diagram Hi, I figured out a way to plot EoT curve which I didn't see in sundial books I own. Diagram is enclosed here. For a better resolution one, see http://dl.dropbox.com/u/31382133/EoT%20.png Best regards, ChiLian 24.8N 121E -------------------------------------------------------------------------------- --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial -------------------------------------------------------------------------------- No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1382 / Virus Database: 1513/3716 - Release Date: 06/20/11 -------------------------------------------------------------------------------- --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial -------------------------------------------------------------------------------- No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1382 / Virus Database: 1513/3716 - Release Date: 06/20/11 -------------------------------------------------------------------------------- --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial -------------------------------------------------------------------------------- No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1382 / Virus Database: 1513/3716 - Release Date: 06/20/11 -------------------------------------------------------------------------------- No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1382 / Virus Database: 1513/3716 - Release Date: 06/20/11
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