Timely Memories: A Look at Anniversary Clocks by John Hubby

This was the theme of the torsion-pendulum clock exhibit in the NAWCC Museum from June 2007 to February 2008. A history of torsion pendulum clocks as displayed in the exhibit with updates to bring it in line with recent discoveries. Color photos of clocks in the exhibit include many rare examples. Twenty-five patents tracing development of torsion-pendulum clocks are provided in a Patent Portfolio supplement, included with the book. 146 + 28 pages.