Recent content by Richard Cedar

  1. Richard Cedar

    Annoyingly random movement....

    My post about the potential of making a clock with a chaotic "double pendulum" was meant to refer to a clock with one pendulum hanging on the bottom of another pendulum (pendulums in series) as described in the Wikipedia article (Double pendulum - Wikipedia) rather than two pendulums "in...
  2. Richard Cedar

    Annoyingly random movement....

    As a maker of sculptural kinetic wooden clocks, I briefly investigated the possibility of using a “double pendulum” on a clock. Double pendulums are used to demonstrate chaotic behavior and their motion can be visually very captivating. My hope was to design a pendulum that had a random...
  3. Richard Cedar

    Clockmaking History

    To clarify, I am not trying to avoid the request as I agree that it is good practice to be able to cite references that support one’s assertions. Being a clockmaker rather than a clock historian, I am interested to know if there is a definitive book on clockmaking history that I should read to...
  4. Richard Cedar

    Clockmaking History

    I am in the process of writing an article for the NAWCC Bulletin on contemporary clockmakers that includes a brief discussion on the history of small clockmaking workshops. The draft article included the paragraph - "With the advent of the industrial revolution, the small craft workshops...
  5. Richard Cedar

    Learning by 3D designing

    Hello Rod, In case you are not aware, you might be interested in Brian Law's 3D printed Swiss Lever escapement clock shown on YouTube - with extensive details of a similar clock on his blog - A design for a Minute engine. Brian has been pioneering the use of 3D printing to create clocks...
  6. Richard Cedar

    Any one used DelphElelectronics Clock Gear Application?

    Chris, I use Gearotic software ( "Gearotic Motion Gear design Software" ) for wheel design and layout. You can see some examples at The software allow you to design numerous types of gear and also has a number of escapement design options. I do not find the Gearotics...
  7. Richard Cedar

    Shape of escapement teeth?

    Chris, I agree that "Laurie Penman: Practical clock escapements" is a great resource, but I would recommend you take a look at Mark Headrick’s work “Clock and Watch Escapement Mechanisms” ( ) which is an amazing resource on escapement design that...

Forum statistics

Latest member
Encyclopedia Pages
Total wiki contributions
Last edit
E. Howard & Co. by Clint Geller