Electrical contacts

[anarxi]

By the way, your relay has a soldered housing.
That small mound at the top is a sealed hole for air to escape.
The black cap with the circuit is simply soldered in a circle to the base.
if you heat the relay properly (electric stove, hair dryer, burner), then simply remove the cap.

 

[anarxi]

a relay is nothing more than an electrically operated switch. putting power to the electrical coil is what pulls the contacts closed (or open depending if it's a NO or NC relay), instead of a manual switch. either relays or contacts will have contacts containing PMs in them. the higher the ampacity rating, the larger the contacts. (and the more PMs)

very ambiguous...
silver is 80 times cheaper than gold...
It is easier to disassemble one relay with 60 milligrams of gold than 5 relays with 1 gram of silver each.
less time for one relay than for five.

and the older you get, the more you value your time....

 

[Shark]

and the older you get, the more you value your time...

 

[anarxi]

And here comes the gold.

 

[anarxi]

Today is Saturday - that means flea market.
very rare relay...
It’s not even in reference books, I found mention of it only on 1 Russian site...

 

[niks neims]

https://www.lomkmm.lv/shop/114-220-009-rps25-pase-811-1594?category=46#attr=

we buy them eur 2.24 a piece

Sorry, no english site yet.

 

[anarxi]

About this site I have on my work computer.

Yes, I entered a query in Russian into the search, so the phone (Google on a smartphone) did not show it to me.
but the price on this Latvian site is very modest.
Here, in Ukraine, prices for relays with gold and platinum actually correspond to the price of the precious metal contained in it.
-10-15% of the exchange value.
If you deposit large volumes (several thousand euros), the gap from the exchange may be 5%

this relay approximately corresponds to RPS 32 (I’ll tell you exactly tomorrow when I fuse it and weigh it)
So RPS 32, passport 213 we accept for 7.8 euros....
I handed them over in person a couple of weeks ago...

although in these gold/nickel 5%
and in RPS 32 -999%

 

[anarxi]

There's a problem.
the holders of fixed contacts did not want to dissolve.
The alloy is magnetic.
adding sulfuric acid, boiling, time (about 18 hours in solution) did not dissolve.
fortunately I have a laser machine, I just cut a hole with a diameter of 1.3 mm in the plexiglass.

 

[anarxi]

lost one contact,

I'll tell you the total weight and sample later...

 

[BShan]

This is not something you can do on a large scale, unless you have superhuman hands. But, for removing contacts which are rivets going through a holder, sometimes you can snip it with wire snips, and one or both sides of the holder will pop.

Here's an awful ascii drawing. Imagine that you are looking at the angle snips head-on, so the jaws look like little triangles. This is the approximate arrangement:

>|o|<

Squeezing with very steadily increasing pressure, you'll feel the "pop", and at that point should be able to stop cutting and pull the holder apart.

 

[anarxi]

You are not right.
one blow, better than controlled compression.
In general, in large relays with a large number of contacts, I simply use a grinder, cutting them all off at once, with a piece of the contact holder.
All this is done in a deep bowl so that the contacts do not scatter to the sides.

however, the dimensions here are too microscopic and the thickness of the holder material is too thin for cutting across.
It will simply be crushed.
(The plate in which the contact is pressed.)
In the die and punch method, which I essentially used, the exact diameter of the hole is important.
In which the contact is inserted.
That's why I mentioned the laser machine.

Believe me - tested by experience

 

[anarxi]

like in this relay.
Now I'm at home, there's only one, so I just used side cutters.

when there are a lot of them, several dozen pieces, then the grinder is an indispensable tool

By the way, this is a relay with contacts made of silver palladium 70/30 alloy.
This is a relay made in East Germany.
It comes with different numbers and different materials of contacts.
The contact material is determined visually by the color of the paint on the screw.
red - palladium
black - silver
yellow - gold (gold/nickel alloy 5%, it looks almost white)

will go for a swim in a solution of citric acid, salt and hydrogen peroxide.

to dissolve the holder and maintain the contact itself.

 

[anarxi]

I'll tell you the total weight and sample later

Edit to add by moderator:
This text is now translated by the OP

 

[Yggdrasil]

English please!

 

[Sabo Hosepian]

I'll tell you the total weight and sample later

Edit to add by moderator:
This text is now translated by the OP

shiny *** gold , unique can blow,on water can flow…
'solved"? :d

Edited by moderator to keep language in line with forum rules.

 

[Yggdrasil]

shiny *** gold , unique can blow,on water can flow…
'solved"? :d

Edited by moderator to keep language in line with forum rules.

Welcome to us.
Keep a proper language in here.
Besides that what kind of text was that?
Some kind of attempt on Haiku?

We do chemistry for recovery and refining here so please keep to that.

Here are a few links for your studies:

We ask our new members to do 3 things.
1. Read C.M. Hokes book on refining jewelers scrap, it gives an easy introduction to the most important chemistry regarding refining.
It is free here on the forum: https://goldrefiningforum.com/phpBB3/viewtopic.php?f=54&t=19798
2. Then read the safety section of the forum: https://goldrefiningforum.com/forums/safety.47/
3. And then read about "Dealing with waste" in the forum: https://goldrefiningforum.com/threads/dealing-with-waste.10539/

Suggested reading:
https://goldrefiningforum.com/forums/the-library.101/
https://goldrefiningforum.com/threads/when-in-doubt-cement-it-out.30236/
https://goldrefiningforum.com/threa...le-read-this-before-you-post-about-ore.33333/


Forum rules is here.
https://goldrefiningforum.com/threads/gold-refining-forum-rules.31182/