Rather like the Shortt clock, only magnetically coupled.
Nifty idea.
Tom Frank, KA2CDK
On Jan 9, 2010, at 3:36 PM, Bob Camp wrote:
Hi
How about a rotary pendulum on a quartz fiber spring with some kind
of trick magnets to drive it / read it out? Put the pendulum and
spring inside an evacuated glass envelope to get around the vacuum
pump issue. The enclosure could be pretty small.
Drive the magnets with a second external clock, and feedback
compensate it. Let the external clock do all the readout via a very
normal gear and pointers system. The trick would be getting the
feedback loop to work purely mechanically with enough gain to
"unload" the master pendulum.
Bob
On Jan 9, 2010, at 2:07 PM, Lux, Jim (337C) wrote:
OK.. So we're moving back in electrical technology....
But what about mechanical? Could modern technology get a
substantial (>order of magnitude) improvement over 19th century
chronometers (either pendulum or balance wheel or whatever). I
know there's some really good quartz fiber torsional spring
schemes, but I think they still need electrical means to keep them
moving and to read it out.
So how good can one do with a mechanical, hydraulic, (or chemical,
I suppose) system? Let's assume it has to have a "direct" readout
that is human readable by a causal bystander. (this starts to
sound like the 10,000 year clock or whatever it is..)
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