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A London long case
clock by John Hubert circa 1690 this clock has a Month wind
duration.
It has its striking rack
assembly mounted on the back plate as shown, its snail is
driven by a star wheel that is mounted to the front plate of
the clock and a arbor connects both running through both
plates.
It strikes hours and half hours on two bells of different
sizes and the clock plates are six posted. |
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A replacement moon disc pusher also known as a ( nodding donkey
) missing from a Thomas Lister 30 hour
brass dial long case Clock.
Notice that its post or stub arbour is riveted through the
dial plate, I can only assume this post had broken at some
stage and all of the items were discarded. This is a good
system as it is pushed from the bottom of the tooth and is not
as critical to damaged tooth tips as other systems.
A recommended book on this
subject is MOON Mechanisms by Peter Grimwood.
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A customer arrived with this clock for
restoration. When asked for the rest of it we were told "this
is all there is". On examination all the customer had was the
two main plates including the front studs, the front plate and
dial, three posts and two fusee stop irons.
A guesstimate for the
cost of making and replacing all missing parts was given and agreed.
The customer also
insisted on having a dead beat escapement with maintaining power.
This
type of clock would normally have had a recoil escapement.
What was missing -
all the internal workings both strike and going, bell , gong,
porch, steps, base, dome, pendulum, hands, etc etc.
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