Impulse Jewel Banking Against Fork

[jdrichard]

Here is the issue. Just repaired This Old Waltham (sounds like a TV Show) and it is runn My great with one exception. After a few hours of running, the impulse jewel ends up on the other side of the fork. Assuming at some point, it just snaps back to the wrong side. There is no double roller as it is from the late 1800s. Wonder how this happens and how to simply fix this condition.

Thanks Guys

JD

Here is the Assembly video

 

[nickelsilver]

It's almost certainly that the guard pin is too far from the roller*. This could be because it is bent, but also due to excessive play between the pivots of the pallet fork, balance wheel, or both in their jewels- or a combination of all of the above. The adjustment of a vertical guard pin to roller table is much touchier than with a double roller and more modern horizontal guard pin.

 

 

[jdrichard]

10 minutes ago, nickelsilver said:

It's almost certainly that the guard pin is too far from the roller*. This could be because it is bent, but also due to excessive play between the pivots of the pallet fork, balance wheel, or both in their jewels- or a combination of all of the above. The adjustment of a vertical guard pin to roller table is much touchier than with a double roller and more modern horizontal guard pin.

 

 

Thanks NS. I will look into this today and see if I can resolve this issue.