Breguet hairsprint magnetized

[Khan]

Hi

After cleaning I tried to be smart and try to de-magnetize it with my blue "etic" Swiss de-magnetizer which usually works but the hairspring is now super magnetized!

[nickelsilver]

Wrap the whole thing in tissue paper, constricting the spring as much as possible, and try again.

[HectorLooi]

Your hairspring looks like it has become coned. It needs to be flattened or it won't be able to run properly.

[Khan]

Thanks its now de-magnwtized

Now I think the problem is that its not flat. It looks like a basket from the side. How to flatten? I might have pulled in the spring to release it when it was curling together when magnetized

[caseback]

One way to avoid hairsprings getting tangled by a demagnitizer is to have them submerged in a jar of one dip while doing so.

I must say I've never seen a hairspring looking like this. It appears that the spring is deformed/damaged evenly along its length. Usually, when it's bent out of flat, you can locate one or more individual points where it is deformed, but not a gradual deformation like this. Even when you stretch it by pulling on it, you would think that there is a weakest point where it bends first, not gradually..

Are you really really really sure it's not magnetized anymore? 

Edited August 14, 2024 by caseback

[rjenkinsgb]

The cheap, simple demagnetisers do not automatically "fade out" the magnetic field, which is an essential part of degaussing.

With those, you need to start with the tool or part against the device, press the button then move the item slowly away from it, out to a couple of feet or more away, before releasing the button.

If you just press and release the button, the residual field will depend on what point in the AC cycle the button was released; it could be small, or it could be strong.

[Neverenoughwatches]

6 hours ago, Khan said:

Thanks its now de-magnwtized

Now I think the problem is that its not flat. It looks like a basket from the side. How to flatten? I might have pulled in the spring to release it when it was curling together when magnetized

A blue spring that has lost its elasticity ? Looks like its been overstretched.  Visit youtube and search for "hairsprings 101"  Fried the old master demonstrates restoring a spring of this shape by pulling it through on itself.

[caseback]

31 minutes ago, Neverenoughwatches said:

A blue spring that has lost its elasticity ? Looks like its been overstretched.  Visit youtube and search for "hairsprings 101"  Fried the old master demonstrates restoring a spring of this shape by pulling it through on itself.

This one you mean? Look at 12m15s:

Edited August 14, 2024 by caseback

[Neverenoughwatches]

2 minutes ago, caseback said:

Deze bedoel je, te zien op circa 12m15s:

Ziet er frustrerend eenvoudig uit 

Yes thats the MAN himself performing miracles. It looks easy because he was extremely good and checkout the size of that spring   

[HectorLooi]

1 hour ago, Neverenoughwatches said:

checkout the size of that spring

Must have come out of a turret clock.

[watchweasol]

Hi. Blue spring steel hairsprings are best wrapped as per nicklesilvers advice to constrict any movement. This advice is also given in De Carles book..