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  • Conical pendulums. doc - NAWCC Forums
    ABOUT CONICAL PENDULUMS conical pendulum isnʼt a pendulum shaped like a cone Itʼs a weight on the end of a string thatʼs swung in a circle from a suspension point so the string describes a conical path Unlike a swinging pendulum, its motion is continuous rather than in discrete back-and-forth bits
  • Meaning of RA on German pendulums - NAWCC Forums
    Hi, everyone, I'm sittin here in Colorado's only clock repair class and a couple of us are wondering what RA stands for? I'm sure someone out there knows, it's a question that has come up before Thanks!
  • ALL ABOUT PENDULUMS - NAWCC Forums
    Clock pendulums usually have a rating nut attached to the bottom of the stick, for raising and lowering the bob, and so raising and lowering the center of gravity
  • Catalog of 400 Day Torsion Clock Pendulums - NAWCC Forums
    Latest update: Nov 3, 2025 This article is intended to provide a catalog of 400 day clock pendulums to fill in some of the omissions in the Horolovar Repair Guide and other references It will attempt cover as many of the different variations from each manufacturer as examples have been discovered Pictures and descriptions of each pendulum's characterisics will be provided along with the
  • pendulum bob weight differences + thick head = (more) ?s
    The pendulums received a push from the mechanism once every 30 seconds to keep them swinging The slave clock had two clock dials on it, showing the time kept by each pendulum, to verify that they were synchronized
  • pendulum weight and knife edge suspensions | NAWCC Forums
    Moving into high Q pendulum construction using carbon fiber or quartz rods, knife edge suspension, more sophisticated escapements, dual pendulums, on and on, can, when properly executed, give better results But, it is a case of diminishing returns All those things may become necessary when precision above 99 99% accuracy is required
  • Help identifying old pendulum clock - NAWCC Forums
    Major clock factories typically acquired pendulums, dials, gongs, etc from companies that specialized in those products The same pendulum can be found with clocks produced by different companies
  • Master Clock Pendulums. How to tell. - NAWCC Forums
    With all the different types of master clock pendulums, how can tell what they are Also what are they? i see some as Invar? What is Invar, and how to tell what it looks like? Is Invar simply a weight? Mercury How is a mercury pendulum constructed and how is the mercury contained? Any
  • advantages of mercury pendulums - NAWCC Forums
    The pendulums were designed to compensate for temperature variations As metal gets warm it expands down The metal (mercury) sealed in the vial has nowhere to expand but up This was supposed to keep the center of oscillation constant
  • Pendulum bob weight - NAWCC Forums
    The things that most of the worlds most accurate mechanical clocks have in common are a version of deadbeat escapement, small swings, and heavy pendulums The only ST 89 original equipment pendulum bob that I actually weighed was 4 0 oz, which was on a mantel clock





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