Clock Parts Terminology •

[bangster]

WHAT'S HERE SO FAR? (Note: Despite what it says elsewhere, David LaBounty originated this thread, following a request by another member.)
(Table of Contents...numbers are Post #'s)

2.Clock Parts Terminology •

2. Chiming clock movement
3.Count-wheel strike elements
4. Deadbeat Escapement
6. Platform Escapement
7. Hairspring Lever Escapement
8. Hermle Floating & Hairspring Balances
9. Generic count-wheel train
10. Clock Dictionary Link
11. Strip Pallet - Recoil Escapement
12. Count Wheel Lever Assemblies
13. Grand Sonnerie Movement
14. Elements of the Rack Strike
15. Hermle Chiming Movement
16. Urgos Chiming Movement
17. Count Wheel Movement-Annotated
18. Wheels 1
19. Wheels 2
20. Preacher (Tool)
21. Pronouncing Clock Names

 

[LaBounty]

Ref. "Practical Clock Repairing", Donald de Carle, FBHI, pgs. 9 - 12, 161.

 

[bangster]

 

[LaBounty]

American strike movement lever terminology...



Ref. "The Levers of American Striking Movements", David J. LaBounty, CMC FBHI, pg. 3, fig. 1.

 

[LaBounty]

Deadbeat escapement parts terminology

Hey Joe-

I'm sure Scottie can easily provide a drawing but I happen to have this one handy...

 

[Scottie-TX]

Deadbeat escapement description

THANKS LAB!
JB, you can readily see the sequence here. Escape wheel is moving CW.
1. A tooth lands on ENTrance LOCKing face and continues sliding across it.
This sliding motion and distance is called OVERSWING. During this slide and overswing, wheel freezes - motionless - ergo - deadbeat.
2. As pendulum returns, tooth meets IMPULSE or LIFT face and there, tooth pushes against face providing impulse to pendulum.
3. After a brief moment or gap, called, "DROP", a tooth lands on LOCK face of EXIT pallet. Again it glides across the face during overswing. Pendulum returns again and another impulse provided to pendulum as tooth pushes against EXIT impulse (LIFT) face. Drop precedes next entrance lock.
The terms used in this diagram are the same for a RECOIL escapement altho there are two differences in motion and design.
1. After lock, pallet pushes wheel and entire train backwards - ergo recoil.
It is the energy or potential stored in this recoil that provides impulse to the pendulum therefore;
2. There are no impulse faces on the pallets and the pallet angles will differ from a deadbeat.

 

[LaBounty]

Re: Different Mainspring Arbors

Hey Scottie-

Here's the platform escapement parts diagram you requested...

 

[bangster]

Hairspring lever escapement

 

[LaBounty]

Here are a few diagrams covering the Hermle balances...

 

[bangster]

A generic count-wheel train, with warning

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[moe1942]

Ran across this and thought it might help clarify things when a problem is being sorted out.

http://clock-dictionary.com/

Pretty general in terms. Just a supplement to the thread we already have..

 

[bangster]

Strip pallet -- recoil escapement

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[bangster]

Count Wheel Lever Assemblies

 

[bangster]

Grand Sonnerie Movement --Gustav Becker

This Now Has Its Own Separate Thread in This Forum


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[bangster]

Elements of the Rack Strike

 

[bangster]

Hermle Chime Movement

 

[bangster]

Urgos Chiming Movement

 

[bangster]

Count Wheel Movement- Annotated

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[bangster]

Wheels, 1

Big gears are "wheels"
Little gears are "pinions"
"Lantern pinions" have round "trundles" instead of teeth
"Cut Pinions" have teeth, called "leaves"​

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[bangster]

Wheels 2

 

[bangster]

Preacher (tool)

 

[bangster]

Pronouncing Clock Names (THREAD)​