securing tungsten contact points

securing tungsten contact points

This topic has 4 replies, 4 voices, and was last updated 28 January 2016 at 17:12 by Roger Provins 2.

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28 January 2016 at 16:15 #3713
derek hall 1
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@derekhall1
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28 January 2016 at 16:15 #222940
derek hall 1
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@derekhall1
Hello all,

I have an electric clock (GPO type 36) that impulses the pendulum by a "Hipp Toggle" which has its original contact points burnt out and destroyed. I have purchased a couple of tungsten points from our good friend Kirk at Hemmingway Tools (no connection other than a regular customer), thinking that I could use these to replace the original burnt out ones.

My line of thinking is that loads of old petrol cars used to use "points" and distributors etc, these points being tungsten I assume.

So to my question how do I secure these tungsten points to the thin brass parts of the Hipp Toggle? can I soft solder tungsten to brass?, is there such a thing as conductive glue for example?

I am looking forward to your replies!

Best wishes

Derek
28 January 2016 at 16:20 #222942
JasonB
Moderator
@jasonb
I have silver soldered Tungsten contacts for some of my engines.

J
28 January 2016 at 16:27 #222943
KWIL
Participant
@kwil
This was the advice given to Jason by Cup Alloys

"Proceed as you thought with your silver solder and flux.

Keep joint gaps small say 2-3 thou.

Use propane to heat so you get good all-round heating of the joint.

Allow to cool slowly.

Regards

Keith"

and it obviously worked
28 January 2016 at 17:12 #222947
Roger Provins 2
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@rogerprovins2
Silver soldering will be the best but electro conductive glue is available.

See eBay 262244630569 for instance.
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