Canon Pinion Problem

[syfre]

Hello dear members,

I need some help about a problem i have on an old Illinois 18s

When i set the time, the canon pinion raise up and disengage the setting wheel.

I think this is a pretty common problem on vintage pocket watch, not the first time i get that.

As the CP was very tight i tried to loose it using a small broach, it help but not resolved totally the problem.

i would appreciate if anyone can help

Regards
 

[bobm12]

Sorry I can't help, syfre, but someone here, who knows pocket watches of that time, may be able to help soon. I will also be following this post so I can learn from it!

 

Cheers,

 

Bob

[Rafal]

Have you put between dial and hour hand wheel a washer? There should be special shaped washer installed to crate small tension to stop hour hand wheel from rising. Im not sure if I understud your problem correctly from your description...

Edited December 11, 2015 by Rafal

[clockboy]

I have read that the only way to fix a over zelous indentation or as I had just too many indentations to create the friction is to broach them out. However it was not possible so I had to purchase a replacement one. Being a vintage pocket watch it will be difficult to source one.

There is an excellent artical (pp209 / 211) in one of Donald Carle books "Practical Watch Repairing" that covers this subject.

[syfre]

Thanks for the answers,

yes there is dial washer but a dial washer is for preventing the hour wheel to raise up.

Thanks for the Donal Carle tip, i don't know why i missed it ; my opinion was to turn a shoulder on the arbor at the position of the snap, this what DC describe. But before altering the arbor i wanted to be sure.

 

There is an interesting paper about canon pinion friction here :

 

http://elgintime.blogspot.fr/2012/01/mechanics-of-canon-pinion-friction.html

 

when reading it after DC explanations it become clearer.

[ramrod]

i've got to read about this. i keep hearing about cannon pinions and i've seen several watchmakers pull them when servicing, but i don't know their function or adjustments. time for school.