Posted by John Haine on 04/04/2015 09:17:05:
Michael, thanks for that, just what I need for a project I'm thinking about! Also similar to a clock in the Liverpool museum I think that Philip Woodward describes in My Own Right time that is driven by a continuously rotating disc powered by a falling weight regulated by a conical pendulum governer.
.
John,
The device in Liverpool Museum is amazing, and very beautiful.
Sadly; due to funding cuts, it is no longer running, and is very poorly lit 
It was built by Bond, in the USA and was 'improved' whilst at the Liverpool Observatory.
… I don't want to hi-jack Mike's thread, so I will send you some links by 'Personal Message'.
MichaelG.