Verge Fusee English Pocket Watch Example

Verge Fusee English Pocket Watch Example

Although the history behind the invention of the fusee is not known, some give credit to Leonardo da Vinci based on drawings he did in 1490.

In the picture below, the fusee chain can be seen on the left. Look over to the right to see the fusee cone. As you can see in this example, the watch is completely unwound. The watch shown here also features a Tompion regulator and a verge escapement.

Verge Fusee English Pocket Watch Chain

How it works:

When winding the movement, the fusee chain would unwind from the mainspring barrel and transfer over to the fusee. As the watch winds down, there is a loss of torque in the mainspring, that’s where the fusee saves the day with “constant force”.  The fusee balances out the distribution of force from unwinding mainspring, which in turn improves accuracy.

This setup also creates a disadvantage for watch repair. The chain and the mainspring are dependent on each other, so replacing the mainspring also means readjusting the chain.

How to open a fusee pocket watch?

If you have a fusee pocket watch, it may have a cover with no obvious way inside. There should be a tiny lever to slide and gain access to the movement beneath the cover. Here is a video:

Modern Fusee Movements:

A great example of a modern watch using fusee technology is the Zenith Academy Georges Favre-Jacot. The video below shows more on how a fusee works.

This post is still actively being created, so more will be added later.

 

Caliber Corner is the world's most popular resource for watch movement pics, specs, mods and DIY repairs. Be sure to check out the member's forum and follow @calibercorner on Twitter, Instagram and YouTube (NOT Facebook). Join our mission to spread movement awareness! Login/Sign-up

Community Reviews & Questions:

  • Keep comments respectful and follow our community guidelines.
  • Keep comments on the topic of Fusee

For off topic or general watch questions, post in the Caliber Corner Forum.

guest

1 Comment
oldest
newest most voted
Inline Feedbacks
View all comments
trackback
Lépine Caliber Watch Movement | Caliber Corner
1 year ago

[…] the concept of the Lepine movement was seen as a radical break from tradition, particularly the fusee which used two parallel plates. The Lepine only uses a bottom plate, with bridges. This made pocket […]

Seagull Caliber St19

Join our mission to spread movement awareness!

Members Online

  • Piet sma2499

Recent Forum Posts

Trending Comments

4

Miyota Caliber 2115

Found in the Aviator branded Special OPS AVW78341G350. It ticks along with +2 sec./month, thats…


4

ALTO Caliber A01

One of the coolest looking movements I've seen in a long time!


2

Miyota Caliber 2115

El casio marlin duro mvd 106 usa el miyota 2115. Cuando busco el repuesto aparecer…


2

ALTO Caliber A01

What's with these prices. It's 20k and has the same regulating system in my $500…


CJDUDHF
2

Sunon Caliber PE11

Sunon is a part of GUANGZHOU Pearl Time Group, PE11 is the only repairable movement…


Sponsors

1
0
Would love your thoughts, please comment.x
()
x