WatchTech

A David Walter Double Pendulum Clock – Part 17, The First Tick

 

First "Tic" today, 20th December, at 2.35pm.

The clock did its first "tick" and we can see it working in the video below

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

In this installment we have lots of pictures of the making of escapement parts.

We start with the support plates with the pillars mounted...

...the movement back plates mounted on the pillars...

...and then the pendulum supports mounted.

Here we see the pallet blanks, the lower pallets roughed out, the upper ones will be cut from the steel bar in front.  Two sets will be made, left and right, one for each movement.

After shaping the slot for the jewel is cut in each pallet.

Milling the upper pallet, the upper pallet is stepped so the pallet faces are alligned.  The upper arm must clear the pins in the escape wheel.

The 4 pallet arms have been cut to size and shape.  The slots are cut for the sapphires which will be cut from the sapphire half boule seen in the front.

The left pallet arms screwed together and ready for stone fitting.

Here we see several steps in the making of the adjusting cages.  This is a critical part for this kind of pin wheel escapenet used to set the pallet arms to the optimal depth.

All the pallet assembly parts, that is quite a pile!

Differrent views of the pallet assemblies fitted to the lower suspension block.

Slicing the sapphire using a diamond saw.  A 2.1mm slice is cut off the boule.

The next cut leaves a 2.1mm square rod of sapphire.

A full view of the case with the thermometer inlaid into the back of the case.

The thermometer scale with its ebony trim.  The scale will be silvered before the thermometer tube is fitted.

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