7 Mar
2013
7 Mar
'13
12:24 p.m.
> I recall a "spiral" slide rule in
a round cylindrical package also.
> Done to extend the length of the scale but not the physical length of
> the rule.
In addition to the Otis Kings, there were Fullers, Thachers, Nestler
cylinders, and probably others. Were there ever slide rules made for bases other
than 10 (say scales
from 1 to 8 or 1 to 16)? Those little 'move the sliders with a stylus
and hook roudn for carry' adding machiens did esist for other bases. The
octal and hexadecimal oens showed up on Ebay a few years
ago. Unfortuantely they sold for about \pounds 500 each (due to their
rarity) which was a lot mroe that I would spaend on a curiousity
Octal and hex addiators? Neat, hadn't seen those. From waht I rememeber they arre like the decimal
version, just with the
right number of slots on the slides. IIRC they had 2 sets of
'uutput
windows', one above and one below the entry area. The second ouytput was
the inverse of the first (so on the octal model 0<->7, 1<->6, etc)
-tony