Holding ratchet wheel

[jdm]

8 days alarm, the wheel is external to the plate. The alam winding is the same, just a bit smaller.

I suppose that square hole bent washers (now missing) friction fit the arbors and keep the wheels from coming out. My question is, for the best execution should I also fit a flat washer between the bent one and the ratchet wheel? 

[wls1971]

I've never seen this type of ratchet wheel held with a friction fit washer they are usually held captive with a ratchet wheel bridge or a pin through the winding arbour.

[jdm]

2 hours ago, wls1971 said:

I've never seen this type of ratchet wheel held with a friction fit washer they are usually held captive with a ratchet wheel bridge or a pin through the winding arbour.

There are no holes for bridges on the plate, neither the arbors have holes. If you look closely there are witness marks on the inner portion of the wheel.

Now i think that a bent washer alone will work just fine.

[nickelsilver]

The only time I have seen a ratchet like this with no positive means of keeping it in place is on fusee movements, where it holds the pretension on the mainspring, and is thus under constant load and can't move.

[jdm]

On 12/2/2020 at 10:20 AM, wls1971 said:

I've never seen this type of ratchet wheel held with a friction fit washer they are usually held captive with a ratchet wheel bridge or a pin through the winding arbour.

 

On 12/2/2020 at 1:21 PM, nickelsilver said:

The only time I have seen a ratchet like this with no positive means of keeping it in place is on fusee movements.

Of course right you were! I wasn't looking at ALL the parts 

I am now almost ready to post the entire story about the clock.