12 Nov
2000
12 Nov
'00
5:22 p.m.
"Rick Bensene" <rickb(a)bensene.com> wrote:
> in some sort of Genrad whatsit that he was
getting ready to scrap.
> (He's keeping the display digits though.) Each digit is a box with a
> bunch of tiny incandescent bulbs mounted in the back; each bulb
Check out the following electronic calculator in my
museum of old calculators:
http://www.geocities.com/oldcalculators/canon161.html
It uses this exact type of display. Pretty amazing stuff.
Thanks. Yes, that is the same sort of thing. One difference (perhaps
an improvement) in the Genrad digit-display modules is that the
grain-of-wheat bulbs are just slid into tubes in the back of the
module -- their contacts poke out the back of the module and mate up
with spring-loaded contacts in the display chassis. Also, the modules
slide out from the front of the unit, so replacing the bulbs is fairly
straightforward and can be done without soldering.
-Frank McConnell