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Forum Index : Other Stuff : OT: Clockwork beats electrons?

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matherp
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Joined: 11/12/2012
Location: United Kingdom
Posts: 9110
Posted: 03:19am 17 May 2015
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Completely off topic but I'm quite pleased with myself so I hope no-one objects to me sharing.

It is my father's 90th birthday in July - but what do you buy for someone who is 90? I know I'll make something






Video of it working on youtube

Built from Clock 22 plans available online. To get an idea of size the dial bezel has an outside diameter of about 11".
 
paceman
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Joined: 07/10/2011
Location: Australia
Posts: 1329
Posted: 03:57am 17 May 2015
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Gorgeous - wonder how accurate it is? Not that that matters probably.

Greg
 
twofingers
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Joined: 02/06/2014
Location: Germany
Posts: 1241
Posted: 04:07am 17 May 2015
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@PM,

Cool! I like it.

My first thought: Antikythera mechanism.

Regards
Michael
causality ≠ correlation ≠ coincidence
 
matherp
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Joined: 11/12/2012
Location: United Kingdom
Posts: 9110
Posted: 07:49am 17 May 2015
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  Quote  wonder how accurate it is?


In theory it should be very accurate - the designer quotes 12 seconds a day for his prototype.

The clever bit to get this accuracy is the Armfield gravity escapement designed in 1987 as interpreted by Brian Law. This decouples the unlatching of the escapement from the pendulum so the variability in unlatching force does not impact accuracy which is the issue with most escapements.
 
Gizmo

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Joined: 05/06/2004
Location: Australia
Posts: 5078
Posted: 12:03pm 17 May 2015
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Moved to Other Stuff.

Nice work. A wood clock is on my to do list, I have a CNC table and the other tools needed so its really just a case of finding a design I like and starting the project.

Be interesting to see how the exposed gears wear over time. Where I live is open dry farmland, very dusty.

Glenn
The best time to plant a tree was twenty years ago, the second best time is right now.
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