POUVILLON RESTORATION PROJECT - August 2012
Continue final finishing, lacquering,
crystalline waxing and reassembly of the movement
Buchanan now turns to
the orrery wheel pack. Shown in the first four photos is one of a pair of a
clever type of ‘quick release’ pivots Pouvillon uses to allow one to readily
remove the spur gears that otherwise would require a much more complex
The demonstration crank
function is added to the tellurian/orrery platform, first photo. The second
photo is a close up of one of Pouvillon's clever wheel designs. Here we have
a tooth profile that allows this wheel to double as a conventional wheel as
well as a bevel wheel. The third photo shows the leap year dial and the two
banks of perimeter dials end-on. This would be the front elevation.
Next the perimeter dials
are installed on the left and right sides of the platform. Can you see the error
in the second photo?
The first photo shows some of the parts that go into the
restored zodiacal precession and year indicator complications. The second
photo is the matching mirror plate that is sandwiched to the extant plate in
the clock which holds all of the mechanism for those two complications. The
third photo shows the input ratchet mechanism for those functions.
The entire under dial wheels works for the two
complications is shown. Frames lacquered, wheels waxed.
The first photo shows the 450 toothed drive ring attached to the lower
zodiac band. Next a side view of that ring and band.
The annular year date ring is attached. Next a view from the top with the
enamel tellurian dial attached. Note the number '2' showing through the enamel dial
at the 4 o'clock position.
Shown here are views of the movements located below and above the tellurian
The first photo shows a close up of the planetary sign indicators
/counterweights. The second shows a sphere that connects the horizontal and
vertical wires to the individual planets and is faithful to what Pouvillon
had originally designed according to historical photographs.
The completed tellurian, orrery and subsidiary dial banks. This is the
"crown" to Pouvillon's creation and contains 563 parts. Compare
this to the several examples
of how this would have looked originally before Pouvillon's
addition of the orrery and subsidiary dials. I think that original maker
would have been impressed.