Deadbeat Escapement adjustment

Paddyt

Registered User
Jul 22, 2021
16
0
1
Country
Hello,

I acquired an old school clock that was decommissioned in the 50’s when clocks were converted to electric.

The suspension spring was broken and the previous owner bent over the suspension rod and hung it on the verge rod. I straightened the suspension rod and replaced the spring with one as close to the original as I could find.

I can’t get the clock to run for more than a minute but being new to clocks I’m not surprised.The video shows how the verge rod is not in sync with the suspension rod. What should I be focused on? I don’t want to start tweaking things like the pallets if they are not the problem only to create bigger issues.

Any help or suggestions would be greatly appreciated.

 
Last edited:

bruce linde

ADMIN / MODERATOR
NAWCC Member
Donor
Nov 13, 2011
9,116
1,468
113
oakland, ca.
clockhappy.com
Country
Region
first off, re-do your video and make it five times longer are regular speed... it's impossible to tell what's going on with effects.

what is your level of experience? do you have tools? have you ever disassembled and cleaned a movement? this movement? most important: is it in beat?
 

Paddyt

Registered User
Jul 22, 2021
16
0
1
Country
I started playing around with clocks about two months ago. I have disassembled a few and put them back together. They have not been complete overhauls, just cleaned them, tried my hand at installing bushings and got them back together. By no means an expert and probably did not do everything correctl. I have enough tools to feel confident in doing most tasks.

I have taken this movement apart, cleaned it and put it back together. It has no chime mechanism so is easier to deal with.

 

Mike Phelan

Registered User
Dec 17, 2003
10,257
104
63
West Yorkshire, England
Country
Region
Crutch loop is loose, but that's not enough to stop the clock. How are the pivot holes and lantern pinions?
 
Last edited:

shutterbug

Moderator
Staff member
NAWCC Member
Oct 19, 2005
47,341
2,124
113
North Carolina
Country
Region
I can't tell for sure if the little wire that keeps the verge on is touching the verge or not, but it can't. It needs to rest on the pin only.
You have what is commonly known as a half dead beat escapement. It is not likely causing any issues unless it's badly grooved at the ends.
 

Willie X

Registered User
Feb 9, 2008
14,744
1,733
113
The escapement looks to be close enough. The pallets are a little deep and could be lowered a bit.

Have you checked the movement closely for wear?

Willie X
 

Paddyt

Registered User
Jul 22, 2021
16
0
1
Country
The escapement looks to be close enough. The pallets are a little deep and could be lowered a bit.

Have you checked the movement closely for wear?

Willie X
thanks for the feedback. I have looked it over and though I don’t have a seasoned eye at what to look for, everything appears to be fine, no obvious signs of wear and the pivots are not loose in the holes.
 

Paddyt

Registered User
Jul 22, 2021
16
0
1
Country
I can't tell for sure if the little wire that keeps the verge on is touching the verge or not, but it can't. It needs to rest on the pin only.
You have what is commonly known as a half dead beat escapement. It is not likely causing any issues unless it's badly grooved at the ends.
Thanks, I looked and the wire is not touching. Dang I wish it were that easy!

E4A3AF0B-9890-4B04-B6A6-0B1B6E4ED00C.jpeg
 

Paddyt

Registered User
Jul 22, 2021
16
0
1
Country
Crutch loop is loose, but that's not enough to stop the clock. How are the pivot holes and lantern pinions?
Hi Mike, I think what is causing the clock to stop is the crutch loop is out of sync with the pendulum. You can see in the video how the pendulum rod and crutch loop have a strange interaction and that is in effect slowing and eventually stopping the pendulum. I would expect the crutch loop to always be traveling in the same direction as the pendulum except at the extreme ends of the swings.

I have tried to put the clock into beat as best as I can but with the crutch banging against the pendulum rod it is difficult.
 

Willie X

Registered User
Feb 9, 2008
14,744
1,733
113
It can't be out of sync unless the crutch wire is loose in the verge, a distinct possiblity. Willie X
 

shutterbug

Moderator
Staff member
NAWCC Member
Oct 19, 2005
47,341
2,124
113
North Carolina
Country
Region
Can we see a pic of the impulse faces of the verge? Especially the exit side.
 

Paddyt

Registered User
Jul 22, 2021
16
0
1
Country
Can we see a pic of the impulse faces of the verge? Especially the exit side.
I’m afraid my photography skills aren’t the best. Not sure which is the exit side, but the pallet on the left is the one with the burr.

Two things have happened today. I played around with the verge (probably a bad idea) and I narrowed the crutch loop which improved the noise and I was able to get the clock into beat. It ran for over 7 hours before I stopped it to take the pictures. Went to start it up again and it was out of beat. 87B690AB-9F94-4531-B1CE-6F062C568BCC.jpeg 79FC3B2B-0409-4B76-9123-42A2B62903CA.jpeg 8A2C0ECD-1BFF-4FA0-9763-944987D1BE38.jpeg 736A0D7D-EA25-49C3-A542-4B091D36426B.jpeg 34CCBDDD-E510-4F1D-A07E-C0985F5E79F4.jpeg
 

Hudson

NAWCC Member
Jul 19, 2010
217
19
18
Spicewood
Country
Region
The escapement is often referred to as "half deadbeat", and can be a bit tricky to fine tune. I followed Steven Conover's method to correct problems on my clock.
The escapement is covered in "Clock Repair Basics, by Steven Conover, pages 43-45" , and "Escapements, by Steven Conover, pages 59-63".
David LaBounty has also published very clear methods for setting up the half deadbeat.
If you search this forum for "half deadbeat" you will find some good information.

Additionally, it appears that the verge you have is more like a recall verge than a half deadbeat. Maybe replace it with a better formed verge?
 
Last edited:

shutterbug

Moderator
Staff member
NAWCC Member
Oct 19, 2005
47,341
2,124
113
North Carolina
Country
Region
The impulse faces both have to be 1.5°, and nicely defined. Yours appears to be more rounded. If you read the articles that Hudson mentioned, you should be able to fix the faces. That will make a dramatic improvement in your escapement action. Use emery paper in increasingly smaller grit size until you get a mirror-like shine.
 

Willie X

Registered User
Feb 9, 2008
14,744
1,733
113
Look up 'frog'. It's a simple tool to maintain the correct angle on those faces that Bugs just mentioned.

Willie X
 

Paddyt

Registered User
Jul 22, 2021
16
0
1
Country
Excellent, thank you all for the advice. I’ll start reading up on it and working on the impulse faces.
 

Willie X

Registered User
Feb 9, 2008
14,744
1,733
113
Or, you can move the anchor (or escape wheel) over 1/16" and use an unaltered/unworn area of the pallet faces.

I always look into this option first.

Willie X
 

Paddyt

Registered User
Jul 22, 2021
16
0
1
Country
Or, you can move the anchor (or escape wheel) over 1/16" and use an unaltered/unworn area of the pallet faces.

I always look into this option first.

Willie X
Thanks Willie, I’m not sure I understand, are you saying you are able to move the verge from front to back or vice versa so the escape wheel is touching the pallet faces in a different spot?

By the way your comment above about the crutch loose in the verge, well I put the verge in a vise and I could feel the crutch was loose. It was so slight that I did not notice it before. But now I’ve started down this rabbit hole so I’m going to see it through. I like the ‘frog’ and other ideas for reshaping the faces. The one thing I am struggling with is the angles, I don’t get the 1.5°, I will have to really sit down and draw it all out.

I picked up Conover’s book at the library today. What a great resource.
 

Forum statistics

Threads
168,146
Messages
1,466,312
Members
48,110
Latest member
Stevemn
Encyclopedia Pages
1,060
Total wiki contributions
2,955
Last update
-