John Harrison's Wooden Clocks - Part 1

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John Harrison's Wooden Clocks - Part 1

John Harrison's Wooden Clocks - Part 1

This video explains the origin of the 1714 Act that offered the 'Longitude Prize' and how the humble country carpenter John Harrison progressed from making simple domestic clocks to more sophisticated precision timekeepers...

Home Made Clock

Home Made Clock

Being a fan of John Harrison who made the first successful chronometer (read the book, Longitude by Dava Sobel) I couldn't resist watching this extract from a BBC documentary (The Clock that changed the World) where the narrator Adam Hart-Davis makes a basic wooden clock. The full documentary is loc...

Big Grasshopper Escapement

Big Grasshopper Escapement

This is an artistic representation in wood inspired by John Harrison's grasshopper clock escapement design at 1726. A bag of stones drives a big wooden gear which in turn drives a small pinwheel which is part of the big 10 pin escapewheel. My aim was to test out the maximum limits of a grasshopper e...

Dynamic Geomag: John Harrison's H1 Clock

Dynamic Geomag: John Harrison's H1 Clock

This model is inspired by John Harrison's H1 clock. The balls in the middle of the red and green rods are magnetic poles: their attraction guarantees the perfect synchronization of the two pendulums.Questo modello si ispira all'orologio H1 di John Harrison. Le sfere in mezzo ai tiranti rosso e verde...

John Harrison

John Harrison

His clock and longitude problem...

John Harrison's Wooden Clocks - Part 2

John Harrison's Wooden Clocks - Part 2

With the aid of a replica clock this video shows the unusual features of the precision pendulum clocks built by John Harrison and his brother James between 1725 and 1730...

The Clock That Changed The World (bbc History Of The World)

The Clock That Changed The World (bbc History Of The World)

Of international scientific importance, the Harrison Clock is only one of only three precision pendulum clocks made by John Harrison and instrumental in solving the Longitude problem. The clock was made in 1727 with an amazing fully working wooden mechanism. Plans are in place to display it as part ...

John Harrison Ras Regulator 'replica' - Video 5 Of 13

John Harrison Ras Regulator 'replica' - Video 5 Of 13

Apologies for the brief 'DVD Video RAM' message at 2 mins 10 seconds: please don't be mislead into thinking that the video has ended. Spielberg need have no fears of competition from me, that's for video shows the first stages of construction of the 'replica' of Harrison's masterpiece, beginning wit...

Harrison H1 Clock

Harrison H1 Clock

Replica of John Harrison marine chronometer clock to help calculate Longitude. a long-sought after device for solving the problem of establishing the East-West position or longitude of a ship at sea, thus revolutionising and extending the possibility of safe long-distance sea travel in the Age of Sa...

Longitude  Full Movİe 2000 Uk

Longitude Full Movİe 2000 Uk

Parallel stories: 18th century Harrison builds the marine chronometer for safe navigation at sea; 20th century Gould is obsessed with restoring it. In the 18th century, the only way to navigate accurately at sea was to follow a coastline all the way, which would not get you from Europe to the West I...