8 Day Wall Clock
Filed under: Virtual Exhibition 2020
8-Day, Weight-Driven Wall Clock
with Striking Mechanism and Perpetual Calendar
John Wilding designed this clock, which has a basic weight-driven going train. Most of the wheels were cut using a home-made cutter frame and single-pointed fly cutter; the pinions were cut with a home-made multi-tooth cutter. Division was accomplished with a simple dividing head using the Myford change wheels.
The pendulum bob was constructed from two brass shells spun over a wooden former and soft-soldered together before filling with lead. The weight is a length of brass bar.
The striking mechanism derives its power from the pendulum. Thus only one train is required. Henry Ward invented this system in 1805.
The datework was devised around 1740 by William Ludlum; it makes allowances for different lengths of months and leap years.
The case is constructed from oak-veneered ply-wood, with solid oak sections and flat pieces, e.g. the doorframe, supports for the shelf and various mouldings.
The dial is made in the traditional manner. The chapter ring was engraved on the lathe, the numerals being wax filled before silvering the ring. The Arabic numerals on the date ring were engraved by a professional engraver; the numerals were wax filled before the ring was silvered.
Bought-in items:
Spandrels (corner decorations on the dial)
Cartouche (name and date plate)
Engraved numerals on date ring
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