Newsgroups: comp.robotics
Path: brunix!uunet!world!moroney
From: moroney@world.std.com (Michael Moroney)
Subject: Re: What *IS* that stuff?
Message-ID: <CALpq0.82s@world.std.com>
Keywords: metal, switch, contact
Organization: The World Public Access UNIX, Brookline, MA
References: <22mtcdINN3ro@uwm.edu>
Date: Fri, 23 Jul 1993 04:56:23 GMT
Lines: 15

rick@ee.uwm.edu (Rick Miller) writes:

>The thing is, there are these little bits of metal welded to the two strips
>right where they contact.  I'd imagine that this is to make a more reliable
>connection and perhaps to prevent arc-damage or corrosion...

>WHAT METAL ARE THOSE CONTACTS MADE OF?

>Where can I get some? or what might I use as a cheap substitute?

The points used in old cars (similar application, but much harsher
environment) used tungsten as the point contact point.  Get some from
a blown light bulb, but don't expect to machine/melt/reshape it.

-Mike
