• 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.

Help with gears

dg23662

Registered User
Jan 26, 2012
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Poquoson Va
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Need to know how is the best way to repair the 2 teeth on this gear and how to repair the lever. Does anyone know where I can get one if repairs are not possible.

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wow

NAWCC Member
Jun 24, 2008
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The bent tooth can be straightened using flat nosed pliers but the two teeth that are broken off will have to be replaced. It is possible to replace those using the dove tail insert method. There are lots of threads on this message board about dove tailing teeth in wheels. An escape wheel is more difficult but is possible. The anchor probably just needs to be polished well.
 

bikerclockguy

Registered User
Jul 22, 2017
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The bent tooth can be straightened using flat nosed pliers but the two teeth that are broken off will have to be replaced. It is possible to replace those using the dove tail insert method. There are lots of threads on this message board about dove tailing teeth in wheels. An escape wheel is more difficult but is possible. The anchor probably just needs to be polished well.
I suggested the new parts because there is a fairly large chunk missing from one of the pallets. If everything was aligned perfectly, and the escape wheel teeth only made contact with the center of the pallet, I guess that wouldn’t be an issue, but most of the pallet wear I’ve seen on clocks is usually off-center like this one. I’ve never had a verge that was worn this badly, and never replaced one, but they all seem to have that sweet spot where they like to ride. 75D802E7-0BF7-4E19-8E28-D10E1BB88CC3.jpeg
 

wow

NAWCC Member
Jun 24, 2008
4,800
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Pineville, La. (central La.)
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I suggested the new parts because there is a fairly large chunk missing from one of the pallets. If everything was aligned perfectly, and the escape wheel teeth only made contact with the center of the pallet, I guess that wouldn’t be an issue, but most of the pallet wear I’ve seen on clocks is usually off-center like this one. I’ve never had a verge that was worn this badly, and never replaced one, but they all seem to have that sweet spot where they like to ride. View attachment 632561
Well, the anchor is in rough shape and the replacement escape wheel does have 30 teeth like the original. If the depthing is ok and they can be mounted on the arbors easily, the new ones may work. The price seems ok. I guess I would try to repair the originals first and if it doesn’t work, order the new ones. Let us know what you do.
 

howtorepairpendulumclocks

Registered User
Dec 18, 2020
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This can be repaired to preserve original/existing material. First thing would be to re-face those two escape wheel tooth tips. It is a faff but totally doable. As above, you can dovetail in a brand new tooth or leave the stub of the tooth you have and just replace the working surface. Once you have the teeth tips replaced, they will be oversized but if you don't have access to a lathe with dividing equipment and/or a depthing tool, it can be done. If you want to explore that route, just shout and I'll do some photos and a drawing or too.
 

dg23662

Registered User
Jan 26, 2012
102
0
16
Poquoson Va
Country
This can be repaired to preserve original/existing material. First thing would be to re-face those two escape wheel tooth tips. It is a faff but totally doable. As above, you can dovetail in a brand new tooth or leave the stub of the tooth you have and just replace the working surface. Once you have the teeth tips replaced, they will be oversized but if you don't have access to a lathe with dividing equipment and/or a depthing tool, it can be done. If you want to explore that route, just shout and I'll do some photos and a drawing or too.
Would love any help that I can receive. Thank you
 

Jerry Kieffer

NAWCC Member
May 31, 2005
2,889
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wisconsin
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Need to know how is the best way to repair the 2 teeth on this gear and how to repair the lever. Does anyone know where I can get one if repairs are not possible.

View attachment 632528 View attachment 632529 View attachment 632530
Over the years I have equipped myself for all Horological repairs that are almost always easily done on a small Lathe and Milling machine. While you may or may not be equipped with a lathe and compatible Mill, I will explain in case you are.

(1) I would first gas weld the verge tips with a A/O micro torch and dress as original.

(2) For the wheel you have two options. You can repair the one you have if retaining the original is desired or machine a new one if replacement is satisfactory. In this case, I will describe machining a new wheel since crossed out wheel blanks are readily available commercially and time requirements are about the same to machine a new one.

(3) I first measure the tooth radius per first photo.

(4) the radius is then scribed on a HSS lathe blank and free hand ground to the scribe line second photo. After awhile you simply touch up previous constructed tools.

(5) check fit third photo.

(6) Machine the teeth using small milling machine and Rotary table for indexing fourth photo. Shown using solid blank rather than a crossed blank.

(7) completed wheel machined on a purchased crossed blank compared to the wheel that was duplicated fifth photo.

Machining a new wheel where appropriate resolves all issues of consistency. If I had replaced the teeth in the existing wheel, I would have machined the replaced teeth in the same manner as the new wheel to assure proper function.

Jerry Kieffer


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shutterbug

Moderator
Staff member
NAWCC Member
Oct 19, 2005
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You might be able to pull that tooth a little longer. It's worth a try. This matching set might be an option too.
 

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