The dial is the face of the clock, and the hands the smile.
David has provided us with a hand making how-to and some great pictures of the results.
Davids comments:
" the making of the Mean/Solar minute hand in steel.
The hand will be the Breguet moon hand style, the material used is
0.80mm thick high carbon steel.
The hand is 48mm long and the center boss is 9mm diameter.
After scribing a center line the hour and minute hands
are marked onto the steel.
The steel is clamped onto the drill table and holes
drilled for the holding collet and the opening in the tip of the hand.
One half of the hand is now filed to shape
With both hands drilled and the 1st half of the minute
hand shaped the hands are sheared off the parent steel.
The minute hand is now cut off the parent steel stock
ready for the other the second half of the hand to be shaped.
The hand has been brought to the desired profile.
One half of the shank is now filed half round.
The other half of the hand shank has now been filed half round.
The finished minute hand is shown now fitted to the
movement has been polished and blued, the gold hand is the Equation Of
Time minute hand, the position of the gold hand relative to the blue
steel hand indicates how far ahead or behind the sun is to Mean time."
Here we see the Wandering Moon.
The Sunburst is 22K gold and the moon disc is .925 Platinum, the moon
disc is slightly convex, the Sunburst is made in two levels to give greater depth to the sun.
New Moon
1st Quarter
Full Moon Waning
3rd Quarter
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
- Installment 14 - The Planisphere
- Installment 15 - The Sidereal Train
- Installment 16 - The Case
- Installment 17 - The First Tick
- Installment 18 - First Synchronisation
This message has been edited by MTF on 2016-02-02 00:53:58