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The April 2002 168 meeting workshop looked at
Graham Mitchell's square dialed Schatz with a badly chewed eccentric
nut |
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Dismantle the movement after using a let down
key to take the power off the spring. Inspect the action of
the escape pallets and escape wheel |
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Take off the back plate to get a look at the inside
story |
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The movement looks pretty good otherwise |
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Fred, Richard and Howard inspectng the back plate.
The nut is really chewed but the inside looks none to flash
either. It is conical and countersunk for the pivot also |
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Dave and Carl inspect the pallets |
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Lindsay recons the pallets have been moved and
are not deep enough. |
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Doug made up a special jig for the press, with
a hole drilled in a piece of bar big enough to take the nut
and an inside conical punch to press out the nut |
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The nut popped out with no trouble. The slot can
now be tidied up and a special fitted screwdriver used to adjust
it |
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Doug discovered that the pallets are way too high
with respect to the escape wheel and adjusts them downwards |
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This was the mystery clock, easily recognised
by its Badische pendulum. A 30 day front wind model. |
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Always compare with the Horolovar Guide. There
are apparently 2 types of these 3 ball (or 5 ball if you like)
pendulums. |
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The adjustment on these is assisted by a spring
in the inside bottom ball which keeps the assembly tight |
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Another example of pendulum adjustment. this time
on another 30 day, much later flat pendulum (not visible) model |
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The flat pendulum is in the base and the balls
visible on top |
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There was also an alarm model |
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?? 200 day clocks |
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A selection of Schatz 1000 day models |
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The ultimate torsion pendulum clock for running
time is the Atmos which may run perpetually! |
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An 8 day Schmidt torsion model with a push rod
in the back to stop the pendulum - and the balance wheel movement |
