Re: Switch Contacts

Cursitor Doom <cd999666@notformail.com> wrote:

On Sun, 15 Sep 2024 21:44:07 +0100, Liz Tuddenham wrote:
 

Nick Hayward <nhayward8990@protonmail.com> wrote:
 

Hi all,
 
I have a switch which isn't making electrical contact. It consists of
two leaf springs. Dead simple. They're springy enough to push against
each other alright. And I've cleaned them with ethanol (didn't work)
isopropyl alcohol (didn't work) and Servisol switch cleaning lubricant
(didn't work either). I am at a complete loss here. Has anyone come
across something like this? I can confidently say I never have!

 
I have had this happen when Hypoy gear oil has got on the contacts, but
as other have said, the fault may be elsewhere.  Were you making your
measurements directly on the springs or on something attached to them?

 
No, I got the probes directly on the leaves themselves.

For the future, it is best to arrange the contacts so the gap between
them is vertical; that way any dirt falls out of them instead of being
ground into the surface.  GPO telephone exchange equipment always had
the relays aligned that way.


--
~ Liz Tuddenham ~
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www.poppyrecords.co.uk