Jump to content

Two Unusual Clocks


clockboy

Recommended Posts

Last night arrived two unusual clocks for repair/service. The first one is a bit unusual but the second one is a real strange one that I have never seen before & should imagine is quite rare.

 

The first one is a mantle clock with a typical French striking movement. What is a bit unusual is the case is not the usual slate/marble but wood. Also the decretive fretting is metal attached to the case. It is a mile out of beat & the metal fretting on the front has been damaged. see pics.

 

post-234-0-15997400-1432124809_thumb.jpg

 

French Movement

post-234-0-74732600-1432124838_thumb.jpg

 

Damaged part

post-234-0-51081000-1432124863_thumb.jpg

 

 

HOWEVER The second clock is a real strange one it is a gravity clock. If my research is correct there is no mainspring or winding it is just the weight of the clock traveling down a geared post that drives it. It is a non runner and I have already told the customer that if anything is broken or missing most likey they will have to be made. The clock is quite rare worth approx. @250. See Pics

 

The glass front also acts as the dial  with numbers painted onto it in reverse.

post-234-0-53176100-1432125130_thumb.jpg

 

Dead beat escapement with pendulum in the front

post-234-0-31698200-1432125154_thumb.jpg

 

Hopefully this pic shows the gearing it travels down & notice the lead attached to the bottom of the clock to add weight

post-234-0-76262000-1432125177_thumb.jpg

 

 

Time is going to be an issue with these but will keep you guys if interested updated

Link to comment
Share on other sites

Hi Guys,

A little story about a gravity clock I repaired recently.

A fellow clockmaker from Tiffanies had a gravity clock on his bench for month's. The problem was that it failed intermittently, no particular time or position on the gear bar. While it worked, it had lots of pendulum overswing, until it stopped, my friend bushed everything and asked if I would try to fix it before it found a home in the parking lot.

I suspected the gear bar assembly since my friend did beautiful bushing work.

In order to test the gear bar, I disabled the click so I could run the movement up and down the bar to see if it would bind up, it did but not always in the same place. I looked in the movement and there were two large round brass guides that slid on the back of the gear bar, they both had developed flat spots where they rubbed on the bar. I rotated the guides about 15 degree's to expose an unused curved area, readjusted clearance as well. Gear Bar and guides must be kept dry.

 

Took a 1/2 hour to repair and now the customer is very happy with it.

My friend owes me a beer

 

Al Takatsch

  • Like 2
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.



  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • I would harden and temper (to a light blue). It's so easy to do and only takes a couple of minutes. A search on ebay UK for "spring steel strip cs" finds plenty available in small quantites and thicknesses from 0.1mm up.  But the question is ( @nickelsilver) which "CS" number is best for watch parts ?  Also, from one of the ads : "CARBON SPRING STEEL. SIZE IS METRIC 15.00mm X 0.10mm X 304 MM  CS100 FINISH BRIGHT . HARDENED AND TEMPERD TO 480-530VPN" I've no idea about 480-530VPN. Does that mean it needs annealing before working?      
    • Here is the insert ring for rectangular or elliptical movements: Note that the length is the side with the stem cut out on the spreadsheet (in the picture below this is 15.15: Here is the fake pdf file, again you need to convert to .zip after download to access the FreeCAD and 3mf files. Rectangular insert disc.pdf    
    • as you took the mainspring out what did it look like? It's amazing how much amplitude you can get if the mainspring actually has the proper shape. last week I was doing a 12 size Hamilton and was very much surprised with the beautiful back curvature the mainspring had. Then the watch had a really nice amplitude the group would be so proud it was 350 until I dropped the lift angle down to 38 that drop the amplitude quite a bit below 300. then with the beautiful back curve it still had really nice amplitude the next day. I really wish all my mainspring's look like this as the watch had beautiful amplitude the next day. So many of the aftermarket pocketwatch Springs I see now do not have anything resembling a back curve may be a slight curve and that's about all. They still work but they just don't work as nice as a properly made spring. then Omega as all sorts of nifty technical documentation unfortunately every single corner is watermarked with where it came from who downloaded it etc. very paranoid company. On the other hand I will snip out images like from the document on recycling a mainspring barrel. for instance here's the section on what your mainspring should look like. water damaged a lot of times means rust was there rust on this watch?
    • I dont understand why a patreon membership would have limited places ??
×
×
  • Create New...