Buren 1321/hamilton 630 Movement Info

[Marc]

Per Marc's request, a picture:

Set Train.jpg

 

Yellow goes on post purple and meshes with stem clutch, orange. Red stacks on top of yellow and should drive blue but spins free. Blue goes on post green, (this is the cracked gear).

 

This is what puzzles me. There is no transfer of force between yellow and red and I can not see that a part is missing. Maybe some sort of spring washer? Can't see it in the part lists.

 

I hope that is clear and someone can explain the relation to these parts. This doesn't seem that complex but I must be missing something!

 

Best,

Stu

 

Hi Stu,

 

I have just had a look at the set up in my Buren 1281 and Hamilton 92 and they both show the same layout (not really surprising), below is 1281.

 

 

You are correct that the yellow wheel goes onto the purple post to mesh with the stem clutch. However, it's the red wheel that goes onto the green post. This is a little awkward as the intermediate wheel at 10 o'clock (in my pic) is sprung loaded to push against the red wheel so this needs to be pushed away slightly for the red wheel to go on properly.

 

It is the blue wheel that stacks on top of the yellow wheel, however, not only should it not be split, but it should be riveted securely to the yellow wheel and should not turn independently. The yellow and blue wheels should be a solid assembly that turns as a unit, which is how rotation is transferred through the system.

 

I suspect that the split in the blue wheel has allowed it to ride over the rivet on the yellow wheel to become a separate entity.

 

I think you need a new part.

 

Marc.

[Geo]

Very interesting Marc, thank you for taking the trouble to strip your movement. All this micro talk is putting me in the mood to service mine, but I really must finish a few other projects first.

[Marc]

I'm in the same boat Geo, I have to resist the temptation to dive into my Hamilton until I have finished a couple of other projects otherwise nothing will get completed.

[clockboy]

Excellent explanation Marc.  As said a new part is required.

[Gotwatch]

Hi Marc,

 

I can't tell you how much I appreciate your grand effort to strip your's to solve this mystery. I owe you a pull or two when you're off your diet. It also saved me pulling my other movement apart to achieve the same answer. As I suspected, the stacked gears should not turn independently.

 

Patrick, I think I'll give your idea a go with the epoxy between the two gears, not the crack, as a temporary fix while I source the part or a parts movement. I may also try to stake the two together. I have nothing to lose at this point.

 

Thank you all for your input. This is by far the best place on the internet!

 

Cheers,

Stu

 

Edit to add: Marc, I'm glad you confirmed that one gear is spring loaded. I noticed that and was worried there was something amiss deeper in the movement.

Edited March 11, 2015 by Gotwatch

[doubleset]

Hi Stu, did you ever figure out what was wrong. I have the same thing with the split wheel.

[Gotwatch]

Hi Stu, did you ever figure out what was wrong. I have the same thing with the split wheel.

Yes, that wheel should not be split. I bought another movement (Hamilton 628, which has the same architecture without the date complication) on the bay that has a broken staff for the part. It was not split, however, the spring loaded pinion is jammed somewhere inside the movement which I'm sure caused the overload of this part so it split. I have not had time to dive into it deeper but luckily have the spare movement for parts if needed.

 

When I strip this down, I'll post what I found.

 

Hope that helps :)

[doubleset]

Thanks Stu, I think it has an off center cannon pinion that conects to the intermediate wheel and minute wheel. That pinion has to be removed and lubed so it can spin when setting the time. I was unsure if it was supposed to be split but that verify's it for me.

Steve