Keywords: Tidens naturlære fig27.png Tidens naturlære 1903 af Poul la Cour Fig 27 Cylindergang <br> Bogen findes digitalt på s da Tidens Naturlære Diagram of a cylinder escapement an escapement used in pocketwatches from the 18th to the 20th century from Tidens naturlære Nature of time 1903 by Poul la Cour Ill 27 An escapement is a linkage in a mechanical watch that gives the timekeeping balance wheel pushes to keep it swinging and at each swing allows the watch's gear train to advance a fixed amount moving the hands forward at a steady rate The cylinder escapement was invented by Thomas Tompion in 1695 and perfected by George Graham in 1726 It was widely used in inexpensive Swiss and French pocketwatches from the mid-19th century to the 20th century One attraction was that it was much thinner than the previous escapement the verge escapement allowing watches to be made fashionably slim The book is digitized at s da Tidens Naturlære From the book Tidens naturlære 1903 by Poul la Cour 2006-08-07 Morten Bisgaard PD-Old PD-old Tidens naturlære Cylinder Escapement Old horology prints |