I, the copyright holder of this work, hereby publish it under the following license: This file is licensed under the Creative Commons Attribution-Share...
driving weight every 30 seconds, and a unique escapement invented by Sigmund Riefler in 1889 that impulsed the pendulum by flexing its suspension spring....
the spring. The constant force applied to the watch's escapement improved timekeeping accuracy. Fusees became obsolete in the 19th century with the wide...
