Hermle Schwebe Anker Movement runs fast

[glbarwick]

I have a Hermle Schwebe Anker Mantel Clock that appears to be 1960s or before according to the minimal research i have done. This clock was given to us several years ago. It has always ran and kept close time. Unfortunately, it has been through several house moves. The movement seemed to have shifted during a recent move. I adjusted and now the chimes sounds close to right, but the movement runs about 10 minutes fast per 12 hours. The adjustment does not seem to make any difference. Any thoughts or advice would be appreciated.

I collect various clocks, but not skilled in repair except for minor adjustments.

Thanks.

 

[Willie X]

Well, that floating balance spring has been deformed at the top. This may, or may not, be your problem. Check to see if you still have about 1mm clearance between the bottom of the balance tube and the lower balance frame.

Next thing, running fast is a sure sign of power loss on these clocks. This is usually caused by wear in the train. If the time train is in good condition, the balance wheel will turn about 360°. That's 180° out from the 'at rest' position, in both directions.

Your movement is a good one, worthy of a rebuild, unlike the planned obsolescence Hermles that came along a few years later.

Willie X

 

[glbarwick]

Thanks for your quick reply and apologize again for my lack of knowledge. I have attached a short video that I hope will help. It appears to me the balance wheel is moving 90 degrees from the rest position and back 180 degrees. Believe this makes since. Is there something I can read or study to learn the terminology better? I am lost when you say "balance tube" and "lower balance frame" as an example.

Again, thanks for your reply.

 

[new2clocks]

Welcome to the forum.

I have a Hermle Schwebe Anker Mantel Clock that appears to be 1960s or before

'Schwebe Anker' is the German term for 'floating balance escapement'.

The floating balance was first used in the mid-1950s, so your estimate of the vintage of your clock is probably accurate.

Regards.

 

[Willie X]

The 'balance tube' is the vertical brass tube on which the balance wheel is attached. It actually has a nice little (non removable) synthetic jewel, top and bottom.

The 'balance frame' is the "C" shaped steel frame that holds the balance tube, balance wire, and balance wheel, in a precice position. A better term might be 'balance assembly'. It's held to the back plate with two screws and easily removable.

There are many ways to test your clock's condition but it would be better to search the archives for the later, and very similar, 340-020 series movement, for which tons of test & repair info is available.

Good luck and report back, Willie X