This is a quick one to thank my peers in the craft. Its how to adjust the pendum settings on a domed top, arabic with brass bezel, long case clock. If you are reading this you already know what Im talking about. That said this is for my more advanced readers as well so Ill publish with that in mind.
The pendulum leader has a turning wheel on it. This is there to allow for horizontal alignment of the beat/balance settting process. This hower has a larger guage balance setter in the form of a pallet arbour clutch.
If you get a situation where the wheel doesnt achieve the desired horzontal offset you can remove the pendulum and while holding the suspension spring, force the whole leader left of right beyond its point of natural resistance. I had one of these as a job, and I did this without removing the face or taking the whole shelf and movement out. This is why Im pulishing it; it took half the time and money discovering this “blind”, so I know it can be done by others.
Also these clocks are absolute nightmares to repair generally. The chime control system is under-specified, for the size and of forces the the massive wheights they have can take. Basically, in my opinion the things are a large mantle clock movements in a long cases…….
With massive torque and revolutions per operation. The top level flys clutch sytem fails, then top pinions on it spiin too fast and its rattling or so badly bush worn it take the whole gear train torque transfer down by about 50%. If this was a car (an analogy I ofter use), it would be an Alfa Romeo. Absolutely beautiful, exquisite lightly specified components, and a lot of power in comparison to other long case, and generally much older, clocks. Im not sure if the people who get to own these clocks, often inherited, understand that have been handed a financial bomb with a lit fuse.
Still, intersting clocks when they are completely mechanically restored as they normally have epic chimes.