• Important Executive Director Announcement from the NAWCC

    The NAWCC Board of Directors is pleased to announce that Mr. Rory McEvoy has been named Executive Director of the NAWCC. Rory is an internationally renowned horological scholar and comes to the NAWCC with strong credentials that solidly align with our education, fundraising, and membership growth objectives. He has a postgraduate degree in the conservation and restoration of antique clocks from West Dean College, and throughout his career, he has had the opportunity to handle some of the world’s most important horological artifacts, including longitude timekeepers by Harrison, Kendall, and Mudge.

    Rory formerly worked as Curator of Horology at the Royal Observatory, Greenwich, where his role included day-to-day management of research and digitization projects, writing, public speaking, conservation, convening conferences, exhibition work, and development of acquisition/disposal and collection care policies. In addition, he has worked as a horological specialist at Bonhams in London, where he cataloged and handled many rare timepieces and built important relationships with collectors, buyers, and sellers. Most recently, Rory has used his talents to share his love of horology at the university level by teaching horological theory, history, and the practical repair and making of clocks and watches at Birmingham City University.

    Rory is a British citizen and currently resides in the UK. Pre-COVID-19, Rory and his wife, Kaai, visited HQ in Columbia, Pennsylvania, where they met with staff, spent time in the Museum and Library & Research Center, and toured the area. Rory and Kaai will be relocating to the area as soon as the immigration challenges and travel restrictions due to COVID-19 permit.

    Some of you may already be familiar with Rory as he is also a well-known author and lecturer. His recent publications include the book Harrison Decoded: Towards a Perfect Pendulum Clock, which he edited with Jonathan Betts, and the article “George Graham and the Orrery” in the journal Nuncius.

    Until Rory’s relocation to the United States is complete, he will be working closely with an on-boarding team assembled by the NAWCC Board of Directors to introduce him to the opportunities and challenges before us and to ensure a smooth transition. Rory will be participating in strategic and financial planning immediately, which will allow him to hit the ground running when he arrives in Columbia

    You can read more about Rory McEvoy and this exciting announcement in the upcoming March/April issue of the Watch & Clock Bulletin.

    Please join the entire Board and staff in welcoming Rory to the NAWCC community.

Recent content by DeweyC

  1. D

    Question about the visual inspection of a new watch

    Leaving aside overall condition (botched screws, fingerprints, scarred plates, deranged balance or spring, dust, sluggish motion, etc). All of this begs the question: What does "serviced" mean? Was it run it through a cleaner whole and then oiled? Was it disassembled except for the...
  2. D

    Bottoming taps for watch case pendants

    There are two different aspects to your post. First: references. The only halfway complete reference on PW cases I encountered was in AWI HT articles by Archie Perkins (not the ones that were ultimately collated into his books on restoration). As for the taps, mechanics are not above...
  3. D

    Poised Collets and Gibri's balance spring weights

    Dan, You just brought this to mind. Somewheres (Jendritski???) there is a photomicrograph of a balance spring with mass added to the spring near the collet. I forget the purported purpose. But I think it was related to your question.
  4. D

    Poised Collets and Gibri's balance spring weights

    Yes, that is the complete series from Jewelers Circular Keystone. I use that book as a reference for discussions regarding watch theory. Are you wondering how poised collets would fit in with his analysis? I do know the effect of mass distribution increases as the distance from the axis. So...
  5. D

    Poised Collets and Gibri's balance spring weights

    Dan, Thank you for that link. He really laid the foundations of modern watch theory but does not seem to get much credit. A lot of companies dropped posied pallets shortly after his analysis of poising vs increased mass (momentum) was published. I think I remember reading it and IIRC it is...
  6. D

    Parting tools.

    It looks like you are using either a Sherline or Emco? I think a Sherline cutoff tool would be best. Mine is for a 102 which has an 8 inch swing. It would be much too large for your toolholder. Which brings us to parting in general. It is always a pig until you gain experience. Even then...
  7. D

    Understanding Standard Deviation

    There are two issues with this attempt to quantify rate variance using SD. The first is very basic information theory. What information is gained by this "metric"? I can see none. All the information required is in the positional rates. The gain "could" come if the observer recorded the...
  8. D

    Parting tools.

    I can tell you your geometry must be almost perfect. This is because it works even though there is way too much overhang. The blade will flex in use. The taper on the faces can be quite dramatic. I would suggest either making a tool of increased thickness, or making several tools of...
  9. D

    Understanding Standard Deviation

    As a card carrying statistician, I have never seen standard deviation used this way. As you probably know already SD is used to estimate the sample spread around the mean for that sample in order to assess if the sample mean is a good indicator of the true mean for the population being studied...
  10. D

    Waltham A 13 A Aircraft clock

    Ed, If you go to my site, you will see these are one of my bread and butter pieces. I believe the service instructions can be found in the 1958 Waltham material catalog. The problem you describe suggests the lubes on the levers and crown wheel have congealed, and likely the plunger needs to...
  11. D

    Sherline Lathe homebuilt power feed

    Color me impressed! Nice work.
  12. D

    Removing broken balance wheel screws from rim (18s Illinois)

    I think you have to be prepared for several approaches. One is as Al sez. But I would soak the balance in the freezer to get the gold to contract from the steel. If that fails, drill down through the remaining stud leaving some meat. Insert a small broach and try backing it out or screwing...
  13. D

    Initial Slowness Mystery

    Just a follow up. Did this ever get resolved?
  14. D

    Tempering Hardened W1?

    Yep, I have one of those. The enamel top is easier to keep clean than the Thermodyne. I do not bother with the brass chips. Just lay the work on the surface and cover with pyrex.
  15. D

    Can anyone identify this tool??

    Thank you both! I never took the time to research the derivation, I just used the thing (shame on me). Ya larned me some stuff! Thank you.
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