Thread: Clock Parts Terminology
01-04-2007, 06:07 AM #1
Clock Parts Terminology
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. 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)
Last edited by bangster; 06-04-2014 at 06:22 PM.
05-05-2008, 12:53 PM #2
Clock Parts Terminology
Ref. "Practical Clock Repairing", Donald de Carle, FBHI, pgs. 9 - 12, 161.
05-31-2008, 06:15 AM #3
Clock Parts Terminology (By: bangster)
Last edited by bangster; 12-22-2012 at 11:03 AM.
09-22-2008, 08:29 PM #4
12-03-2009, 07:35 PM #5
12-03-2009, 08:05 PM #6
Deadbeat escapement description (By: LaBounty)
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.
Last edited by Scottie-TX; 12-05-2009 at 09:44 PM. Reason: Title change
01-02-2010, 11:47 AM #7
09-15-2010, 01:43 AM #8
Hairspring lever escapement (By: LaBounty)
Last edited by bangster; 10-19-2011 at 01:14 PM.
09-15-2010, 10:53 AM #9
10-19-2011, 11:52 PM #10
10-28-2011, 10:10 AM #11
11-02-2011, 01:02 PM #12
11-10-2011, 04:49 PM #13
11-11-2011, 01:51 PM #14
Grand Sonnerie Movement --Gustav Becker (By: bangster)
Last edited by bangster; 11-11-2011 at 09:27 PM.
11-12-2011, 05:31 PM #15
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