Keywords: Huygens first pendulum clock - front view.png Drawing of the first pendulum clock designed by Dutch scientist Christiaan Huygens in 1657 Huygens contracted his clock designs to clockmaker Salomon Coster of The Hague who actually built the clock The pendulum had a wider swing than modern clocks perhaps 80°-100° due to its verge escapement The drive force for the clock was provided by the two weights at bottom in an ingenious endless rope mechanism Downloaded 2010-03-07 from http //books google com/books id UlJKAAAAMAAJ pg PA182 Ernst Gerland and Friedrich Traumüller 1899 Geschichte der physikalischen Experimentierkunst Wilhelm Engelmann Leipzig Germany p 182 fig 182 on Google Books 1899 Author Public domain PD-old-100 Pendulum wall clocks Christiaan Huygens 17th-century technical drawings Old horology prints 17th century domestic interiors and homewares in drawings and engravings |