The UltraLog Slide Rule
"Hi Zvi. Looks like you are onto
something big..." (Atsushi Tomozawa - engineer and slide rule collector)
The UltraLog is the
proposed design of what I believe could become the most advanced
general engineering slide rule ever produced. It borrows ideas
from many slide rules including the Aristo 0972 HyperLog, Pickett
N3 and N4, Hemmi 260, Flying Fish 1003 and the Keuffel &
Esser Deci-Lon and KE-Lon (Deci-Lon's intended successor, never
produced), as well as the original insight here and there. Had it
not been for the HP35 electronic calculator, it is very likely
that similar slide rules would have appeared during the late
1970s.
I am convinced that some 500 slide rules could be produced and
sold at not much more per unit than what collectors are already
willing to pay for an 'as new' Deci-Lon or a Faber Castell 2/83N
for example. The following pages describe the UltraLog and the
emerging project that will turn it from a vision to a reality.