Goal: $300, Received: $275.00 (92%) Contribute Now
Donate whatever you can or Join the 14,000 other NAWCC members for only $80 (plus $10 for hard copy publications). Check it out here.



Page 1 of 2 12 LastLast
Results 1 to 15 of 17
  1. #1
    Registered user.
    Join Date
    Mar 2008
    Location
    Gothenburg
    Posts
    2,854

    Default Fusee cone assembly help needed....

    I am working on an old Fusee watch and am stuck on the fusee stop mechanism.
    I have not seen this type before and I am not even sure it is complete but hopefully someone here knows better what I have on my desk!

    There is no conventional fusee stop mechanism. Instead I found the parts in the picture below. Part marked B fell out when I disassembled the movement! I have a hunch that somehow part B should fit in D and work by stopping against A when the chain is close to full wind. The small spring C was found in the slot at D when I opened the lid, but I have no clue to how all of this is interacting!



    Anyone here who is familiar with this set up and can guide me to how they are assembled?
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Fusee special.jpg 
Views:	2448 
Size:	183.8 KB 
ID:	333891  

  2. #2
    Registered User gmorse's Avatar
    Join Date
    Jan 2011
    Location
    Breamore, Hampshire, UK
    Posts
    7,038
    Blog Entries
    1

    Default Re: Fusee cone assembly help needed.... (By: Skutt50)

    Hi Skutt,

    Part B should be straight and not bent as far as I know, and just slide across the top of the fusee when the chain reaches it.

    Click image for larger version. 

Name:	Fusee_Exploded_View.jpg 
Views:	20 
Size:	136.2 KB 
ID:	333900

    Regards,

    Graham

    "Ut tensio, sic vis" - Robert Hooke

  3. #3
    Registered user.
    Join Date
    Mar 2008
    Location
    Gothenburg
    Posts
    2,854

    Default Re: Fusee cone assembly help needed.... (By: gmorse)

    Super Graham

    I kind of expected you to help out in this. Many thanks.
    The movement came with a broken chain so the fuse slide may have been bent during the unwind! I will straighten it and see if I can get it back in action.

    Right now I have the pleasure of repairing the chain which includes making a new hook for the barrel. Whish me luck!

  4. #4
    Registered user.
    Join Date
    Mar 2008
    Location
    Gothenburg
    Posts
    2,854

    Default Re: Fusee cone assembly help needed.... (By: Skutt50)

    Just to let you know, it worked out nicely. Once I straightened the bent fusee slide everything made sense and it was easy to put it back together........ Everything looks great, the chain is repaired and I now need to make the barrel hook before testing the full movement.

    Thanks for your help Graham.

  5. #5
    Registered User gmorse's Avatar
    Join Date
    Jan 2011
    Location
    Breamore, Hampshire, UK
    Posts
    7,038
    Blog Entries
    1

    Default Re: Fusee cone assembly help needed.... (By: Skutt50)

    Hi Skutt,

    These stop mechanisms seem to be commoner in French and Swiss fusees like yours than in English ones.

    Regards,

    Graham

    "Ut tensio, sic vis" - Robert Hooke

  6. #6
    Registered User klokwiz's Avatar
    Join Date
    Feb 2009
    Location
    Annapolis, MD
    Posts
    1,030

    Default Re: Fusee cone assembly help needed.... (By: Skutt50)

    Skutt,

    Good job on restoring this to service. like yourself i had not seen this type of locking device. I wonder how many other versions there are? Maybe Graham could chime in?

    Joe

  7. #7
    Registered user.
    Join Date
    Mar 2008
    Location
    Gothenburg
    Posts
    2,854

    Default Re: Fusee cone assembly help needed.... (By: klokwiz)

    Interesting question Joe,

    I can't recall any other than the "conventional" arm that is pushed by the chain when close to full wind, and this!
    (After having fixed this I got a hunch I had seen one of these a long ago but I had no memory of it!)

  8. #8
    Registered User gmorse's Avatar
    Join Date
    Jan 2011
    Location
    Breamore, Hampshire, UK
    Posts
    7,038
    Blog Entries
    1

    Default Re: Fusee cone assembly help needed.... (By: klokwiz)

    Hi Joe,

    Like Skutt I've only seen the usual English stop work with a pivoted lever under the top plate, and much less commonly this sliding bar mechanism. Oh, and I seem to recall seeing Geneva stop work on a fusee somewhere a long time ago, but that was on a clock I believe.

    Regards,

    Graham

    "Ut tensio, sic vis" - Robert Hooke

  9. #9
    Registered user.
    Join Date
    Mar 2008
    Location
    Gothenburg
    Posts
    2,854

    Default Re: Fusee cone assembly help needed.... (By: gmorse)

    Hi Graham

    Geneva Stop Work on a fusee. Interesting.

    Do you remember where it was mounted? On the fusee I would imagine or the chain would live a dangerous life.

  10. #10
    Registered User gmorse's Avatar
    Join Date
    Jan 2011
    Location
    Breamore, Hampshire, UK
    Posts
    7,038
    Blog Entries
    1

    Default Re: Fusee cone assembly help needed.... (By: Skutt50)

    Hi Skutt,

    Yes, it would have to be on the fusee!

    Regards,

    Graham

    "Ut tensio, sic vis" - Robert Hooke

  11. #11

    Default Re: Fusee cone assembly help needed.... (By: gmorse)

    There's a slight variation to the 'normal' fusee stop work for watches/chronometers with reverse fusees. As it reaches the top of the fusee, the chain raises a sprung lever but instead of the cam/stop piece on the fusee cone butting into it in compression, the lever part has a slightly undercut end piece which is caught by the stop piece and puts it in tension. Its done this way simply because the fusee and barrel rotate in opposite directions in this circumstance rather than in the same direction as in an 'ordinary' watch.

    Click image for larger version. 

Name:	IMG_4091.JPG 
Views:	12 
Size:	408.1 KB 
ID:	334090

  12. #12
    Registered User gmorse's Avatar
    Join Date
    Jan 2011
    Location
    Breamore, Hampshire, UK
    Posts
    7,038
    Blog Entries
    1

    Default Re: Fusee cone assembly help needed.... (By: SKennedy)

    Hi Seth,

    I think this is a very elegant solution to that particular problem, which would otherwise need a more complicated layout.

    Regards,

    Graham

    "Ut tensio, sic vis" - Robert Hooke

  13. #13

    Default Re: Fusee cone assembly help needed.... (By: gmorse)

    I was looking at this movement a couple of days ago and remembered this discussion. Geneva stopwork on a fusee. 6 notches in the star to allow for 5 turns and the finger piece on the fusee arbor is a quite different shape to the more usual.

    Click image for larger version. 

Name:	IMG_4247.jpg 
Views:	6 
Size:	190.3 KB 
ID:	338969

    Click image for larger version. 

Name:	IMG_4249.jpg 
Views:	3 
Size:	86.2 KB 
ID:	338970

  14. #14
    Registered user.
    Join Date
    Mar 2008
    Location
    Gothenburg
    Posts
    2,854

    Default Re: Fusee cone assembly help needed.... (By: SKennedy)

    Thanks for the pictures SKennedy.

    This might been the solution Graham mentioned in his posting #8 above.
    Quite a nice solution to save the chain in a fusee movement.

  15. #15

    Default Re: Fusee cone assembly help needed.... (By: Skutt50)

    Having seen the Geneva stop for the first time in SKennedy's Post, I can only wonder: why didn't this excellent idea show up far, far more often...it seems an almost Perfect Design ! Michael.

Similar Threads

  1. English Triple Fusee Spring Replacement:Help Needed on dimensions.
    By prideofmatchingham in forum Clock Repair
    Replies: 4
    Last Post: 12-29-2016, 12:09 PM
  2. English Pocket Watch Fusee cone repair help
    By cmtul in forum Watch Repair
    Replies: 32
    Last Post: 09-12-2014, 01:28 AM
  3. English Pocket Watch Help with fusee diss-assembly
    By fuseefan in forum Watch Repair
    Replies: 10
    Last Post: 08-30-2010, 08:49 PM
  4. Fusee, verge w/mask identification help needed. Pair case.
    By Keven in forum European & Other Pocket Watches
    Replies: 6
    Last Post: 08-23-2008, 09:36 AM
  5. English Pocket Watch Fusee Movement Assembly Help
    By osbgj001 in forum Watch Repair
    Replies: 3
    Last Post: 02-23-2008, 09:55 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •