Clocktime: Teiger Shelton Solar Longcase 1736, 05 Gridiron Pendulum

John Shelton - The Teiger Shelton walnut month-going longcase clock, concentric apparent and solar hands, annual calendar.
Join Dr John C Taylor OBE from the Clocktime digital museum as he discusses the gridiron pendulum of the Teiger Shelton Solar Longcase, dated 1736.
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So, if I open the door, you can see the single weight here just driving the mechanism and the Shelton version of John Harrison's gridiron pendulum compensation for the changes of temperature. You have the five steel rods and you've got the four brass rods giving differential expansion, which means the bob stays in the same place.