P3D Re: Halogen viewer bulbs

[George Gioumousis <georggms@xxxxxxxxxx>]

George Gioumousis wrote
> 
> Dr. George A. Themelis wrote
> ---------------------------- snip -------------------------------------
> > 
> > When using high current/low voltage bulbs in viewers, you have to worry
> > about light flickering, which is caused by oxidation in the switch
> > contacts.  I am now looking into installing a "microswitch" like Dave
> > Burder has done in the modified Sterolists.  It is not clear to me how
> > these switches work.  Is there a contact made?  If it is, why would
> > these switches eliminate flickering? (as some people claim - I have no
> > personal experience)
> > 
> > -- George Themelis
> > 
> I took a couple apart while in college. They have a bistable spring so
> they make or break cleanly. The spring (then, I don't know for now) is
> made of a beryllium-copper alloy which does not fatigue anywhere as
> much as most metals. They seem to last forever.
> 
> Sincerely,
> George Gioumousis
> 
> 

Dear George1 and George2,
It seems to me that a discussion of mechanical engineering of
sealed snap action switches is not appropriate to P3D. Perhaps
a standard Internet group on ME or EE, or perhaps ME3D.

Respectfully,
Dr. G. :-]


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End of PHOTO-3D Digest 2651
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