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  1. URGO'S 32 PENDULUM LENGTH - NAWCC Forums

    Mar 27, 2025 · Stick pendulums are readily available and easy to adjust. You will have to do some looking around to find a lyre pendulum and modifications will be more difficult.

  2. Catalog of 400 Day Torsion Clock Pendulums - NAWCC Forums

    Sep 6, 2021 · Catalog of 400 Day Torsion Clock Pendulums 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 …

  3. Broken pendulum - NAWCC Forums

    Nov 29, 2024 · while trying to assess and fix the rubbing of the pendulum, I broke the wooden rod to a e Howard figure 8. I have looked on the time savers website but not sure what exactly I need to type in …

  4. "R=A" label/decoration on pendulums - NAWCC Forums

    Jul 18, 2021 · This apparently is such a basic question that the board's search function won't deign to help me, but what is the significance of the "R=A" seen on some wall clock pendulums?

  5. French Gridiron Pendulum differences? - NAWCC Forums

    Oct 4, 2024 · What's the significance, if any, of some early 19th century French gridiron pendulums having this extra steel component on the front? Some table regulators seem to lack this while others …

  6. Seth Thomas 48S Pendulum's Mercury tube missing. - NAWCC Forums

    Mar 14, 2025 · Just got this in yesterday. I have several questions regarding the missing glass mercury tube. The existing tube appears to have small bits of lead and is capped with a silver type metal cup …

  7. Safety of Mercury in Pendulums - NAWCC Forums

    Dec 15, 2002 · How safe are mercury pendulums used in large regulator clocks (jewelers regulators and standing floor regulators) ? Are the jars generally sealed ? If they are not fully sealed then it would …

  8. Mercury pendulum - NAWCC Forums

    Dec 16, 2025 · Leave them alone. These deposits are a sure sign of an old, real mercury pendulum. Most "mercury" pendulums you find are fake and have solid metal inserts. Uhralt

  9. pendulum bob weight differences + thick head = (more) ?s

    Mar 28, 2016 · Both pendulums were seconds pendulums, about 1 meter (39 in) long, with a period of 2 seconds; each swing of the master took exactly one second, with the slave's natural rate very slightly …

  10. Does temperature affect pendulum clocks? | NAWCC Forums

    Dec 5, 2004 · I do not heat my shop at night and was wondering if the nightly drop in temperature would affect the time on my pendulum type clocks?