Jump to content

Suspension spring supplier


mbhorology

Recommended Posts

I've got a broken suspension spring which is 0.08mm thick x 10mm wide.   Problem is that I can't find a supplier for this thickness of suspension spring steel.  0.15mm x 6mm easy to get, but what about other sizes?  Any thoughts on where I can get some from before I consider butchering some cheap feeler gauges.

Link to comment
Share on other sites

The movement is from a Gledhill Brooke time recorder.  It is a very heavy duty fusee movement with maintaining work.  I have started to remove the rivets from the suspension spring in preparation for a new spring steel:

https://drive.google.com/file/d/1PxWHamrbkNqVzRzn3jGQUvOKT8ERgPr2Xg/view?usp=sharing

This is a picture of the movement out of interest, but the suspension spring is attached to the back of the case and not the movement.  Note the back cock.

https://drive.google.com/file/d/1-nVR7AElMVF6sKuqTx4sEJs-p2-zCssVRg/view?usp=sharing

 

Link to comment
Share on other sites

That’s an odd fellow. Looks like you are going to have to make one. You can buy s/spring sheet and cut it to size. You need to buy slightly thicker and with some wet and dry emery rub it down to the thickness you need. If you google clock suspension spring sheet you will be able to find it. No Longcases or fusee s/springs have the width.   

Nice movement with maintaining power and looks like a deadbeat escapement.

Link to comment
Share on other sites

Thanks for the replies.  Looks like I'll be going down the route of reducing the thickness some spring sheet sheet to get the right size.  I already have some 0.15mm so its not going to take much effort to bring that down to 0.08 as needed.

Yes you are correct it is a deadbeat escapement.  Specifically it is a Brocot deadbeat escapement which I've not seen on an English made clock before.  They must have stolen the idea from a French clock!

https://drive.google.com/file/d/1jy65s5Km7TtQ-z60-p4-C5lrXYJhdredXw/view?usp=sharing

 

 

Link to comment
Share on other sites

I am not sure why you would bother trying to reduce the 0.15 to 0.08 as I doubt you can get it 0.08 as an even thickness and this would lead to it hinging on the thinnest part or even a wobble on the pendulum. Why not try using the 0.15 as a test to see if it runs and adjust the pendulum to get the time right.

Also adjusting the length of the SS would give it more flexibility.?

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

    • The problem sounds very much like what might happen when failing to do the reset procedure. The stopwatch not working could be a few things.  There are two different motors, one for the center sweep seconds and one of the minute counter.  Damaging a coil is the most likely thing to do wrong when changing the battery, but that would likely just take out one of the two.  So "start" it wait and see if the minute counter doesn't tick over.  If that ticks, and you've done the reset procedure, it's probably damage to the sweep second coil. If neither works, then it could be the button contact is damaged.  It's a tiny bit of copper trace on the PCB that curls around the edge to make a circuit and it can break off.  There's a way to trigger the buttons from the small pads on the back of the movement, as well as check them with a multimeter, if you are familiar with one. But give this a try, pull the crown out to the second position and hold down button "B" (10 o'clock) for a few seconds.  This is suppose to spin the minute counter to let you reset it to 0.  If it doesn't move and (I assume) button 'A' (2 o'clock) doesn't start the chronograph, then either both buttons have failed at the same time or there is something else wrong. A leaking battery can take out the traces on the circuit board, and this can take out the motors and/or buttons, but you didn't say anything about it and it should be obvious if it leaked enough to do that.  
    • Perhaps not where you live, but here in DK, you get by the taxman financially quartered if you order from outside the EUSR. These center wheel weren't that expensive 5 - 7 years ago, around $45-$50. I guess stock is drying up and these days we have to pay with worthless confetti money.
    • A little cleaned up, don't think I will polish the brass. Nice caramel color I think. Looks like the inscription says: Ludwig & Fries Frankfurt A.M.  The lanterns were a little tweeked but able to gently flatten out with no breaks. The 6 and 7 pivot beds are broken but the rest of the beds are intact. Box and velvet a bit rough but still functional. Overall nice and just a bit larger than the one above. Why I need 2 I haven't figured out yet...
    • Good job! Wear it well.. .  
×
×
  • Create New...