• 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.

Bishop and Bradley movement


New Member
Jan 18, 2021
Need some advice on why power seems to come and go.? Not related to any gear revolution but I suspect tooth wear may be a problem. Will run for 5 to60 min and power just stops to escape wheel. When I move either the 4th or 5th gear axially power returns. Movement is clean and also has brass pivots.. any thoughts??


Registered User
Jun 15, 2015
Downingtown, Pennsylvania USA
Moving the wheel axial seems to be a clue. I would concentrate on the 4th wheel and look from the sides. It is either in the teeth as you suspect, but might also be rubbing on the frame or somewhere else and you might be able to see something from the side. Pictures always help.



NAWCC Member
Feb 19, 2005
Cornwall, Ontario, Canada
There's a lot of things that can come into play:
How are all the bushings (or wooden pivot holes)? They can be somewhat of a sloppy fit, but excessive wear or ovaling can cause issues. If they've been modified or replaced, make sure they aren't too tight. 5 degrees tilt is a rough guide.
Are any of the pivot ends dirty or gummed up?
Is there adequate end shake in each gear? Do they run better in one area (up on front plate or against rear plate)?
Have you checked the mesh of each pair of wheels in sets of two at a time?
Any broken or poorly repaired teeth? If the repairs are too fat, or don't mesh properly you can get power loss.
Are they pulleys in the case working smoothly?
Are the pallets of the escapement nice and clean, oiled?
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