🚀 go-pugleaf

In article <.59@ccs.carleton.ca>, @ccs.carleton.ca writes...
>In article <1992Sep13.064605.18798@rti.rti.org> jb@rti.rti.org writes:
> 
>>"slip ring [ELEC] A conductive rotating ring which, in combination with
>>a stationary brush, provides a continuous electrical connection between
>>rotating and stationary conductors; used in electric rotating
>>machinery, synchros, gyroscopes, and scanning radar antennas."
> 
>>       - McGraw-Hill Dictionary of Scientific and Technical Terms
> 
>If that's the case, would the following work ...
> 
>Using printed circit boards, as described elsewhere, etch the a series
>of circles on the boards. Use small ball bearings as brushes and the
>circles as bearing races. Not only would you have a slip ring but also
>a fairly good load bearing joint ( at least for light duty applications)
I tryed this and it didn't work for me.  I think it was because I needed 
a spring maintain contact.  I  think the berings don't provide much surface
contact either.