David has completed much in the last weeks.
Following is the description in Davids own words.

For those of you who didn't see the earlier installments of this series, you can catch up by looking here:
    - Installment 1 – Introduction and Cutting out the plates
    - Installment 2 – Making the Barrel
    - Installment 3 – The Suspension
    - Installment 4 – Invar Pendulum Parts
    - Installment 5 – Making the Wheels
    - Installment 6 – Completing the Barrels, Cutting some Pinions
    - Installment 7 – The Escape Wheels
    - Installment 8 – The Mean/Solar Movement Main Train
    - Installment 9 – The Equation Wheel
    - Installment 10 - The Equation Movement is Finished
    - Installment 11 - Making a Cock
    - Installment 12 - The Support Plates
    - Installment 13 - Perpetual and more


"The Planisphere train is now
made and fitted to the lower front plate, the Lapis Lazuli disc has been
cut, inlaid and fitted to its cup, along with a few clever ideas for
the components working together which came to mind when I was making the
various parts.
There are 12 parts, 12 screws, 1 steel spring, 4 jewels and a hollow
steel post to support the Lapis Lazuli disc.

Descriptions;

Cutting the Planisphere Change Wheel; This wheel has 40 ratchet shaped teeth.

Planisphere Date Pinion; The steel pinion has 8 leaves.

Planisphere Train; The complete train is set in place, the wheel
meshing with the hour wheel moves the Date Change Wheel once per 24
Sidereal hours.

Night Sky; The Lapis Lazuli disc has been cut to dimension, the stone is
carefully cut into 12 segments radiating from the center.
Each segment has the correct division for each month.
The inset lines are 22K gold, 0.60mm wide.
A temporary paper calendar dial placed around the Night Sky is a
printout of the engraved brass dial which will be fitted at a later date.


Now that the Lapis disc is made and fitted, I will begin making and fitting
the gold stars to the stone, there will be 4 or 5 sizes of gold stars
and pinpoints representing the varying magnitudes of the stars.


As you know I prefer the ability to remove the calendar plate, or in
this case the Wandering Moon plate and its mechanism, without
interfering with the running of the clock.
The escape wheel which is independent and Co-Axial with the seconds
arbor and rotating  at different rates on the Sidereal movement must be
all the way forward to intersect with the pallets, in previous versions
of this clock I was able to use the front plate to support both arbors.
However as this Sidereal movement will have the addition of the
Wandering Moon complication and a Sidereal Time/Civil Time conversion
train to drive the Wandering Moon this movement now has 3 plates.
Naturally I want to be able to remove the 3rd plate with the Lunar
mechanism from the movement and not interfere with the running of the clock.

To achieve this and to have the escape wheel forward where it needs to
be I have designed and fitted 2 separate cocks, one for the escape wheel
front pivot, the other for the seconds front pivot.  I made the seconds
cock the same height as the inner face of the 3rd plate then cut the
plate to accept the seconds cock and simultaneously profiled the outer
portion of the cock to match the serpentine shape of the plates.

Descriptions;

Co-Axial escape arbors1;  Top view of the 3 plates, the upper 3rd plate
will be home to the Wandering Moon and the Sidereal/Civil time
conversion train. The 3rd wheel is shown driving the seconds arbor which
is under the uncrossed 1st wheel in the sidereal conversion train. The
shaft with the brass collet is for the escape wheel.

Co-Axial escape arbors 2; The 3rd plate has been removed to show the two
cocks supporting the escape wheel/seconds arbor.

Co-Axial escape arbors 2a;  A side view of two cocks with the top plate
fitted,  the gap  between the cock and the top plate is visible each
side of the upper cock, I have also made the cock 0.2mm lower than the
upper for safety clearance with any part of the .

Co-Axial escape arbors 3; The upper cock for the seconds arbor has been
removed showing the seconds shaft passing through the hollow escape
wheel arbor.

This arrangement is very rare to find in a clock.



This message has been edited by MTF on 2015-11-17 00:53:09