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PICKETT & ECKEL   N800-ES / N800-T   ( 10" / 25 cm Scales )



PICKETT & ECKEL INC., Chicago, ILL. / USA                 (1948)
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SCALES of the  » ALL METAL LOG LOG SPEED RULE «  Model N800-T/ES
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Front Side                                             Back Side
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LL1     exp(+0.01X .. +0.1X);      LL2         exp(+0.1X .. +X);
         exp(-0.01X .. -0.1X)                   exp(-0.1X .. -X)
A                          X2      DF                         πX
----------------------------------------------------------------
B                          X2      CF                         πX
ST                 arc(0.01X)      CIF                      1/πX
T           tan(X); tan(0.1X)      L                         lgX
S        sin(0.1X); cos(0.1X)      CI                        1/X
C                           X      C                           X
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D                           X      D                           X
DI                        1/X      LL3          exp(+X .. +10X);
K                          X3                    exp(-X .. -10X)

REMARKS:
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These models N800-T/ES are the followers of the N-500-T/ES. They
are made of aluminum. Both came with leather cases, which can be
clipped on the user's belt - typical for the USA: As seen in the
"Western Movies" ready for a "quick draw".

The "-ES" SlideRule  has the typical "Pickett-Yellow" body:  The
"-ES"-Ext. in the model-number means "Eye-Saver"  -  Models with
"-T"-Ext. (for "Traditional") have a white body. ...

 

The term "synchro scale" stands for the combined LogLog scales:
They are designed as a uniquely, split long scale, and, because
LL+/- are reciprocal, 2. & .5 (eg.) share the same tick.

                 Historical Remarks ...
impressum:
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© C.HAMANN  http://public.beuth-hochschule.de/~hamann   12/14/07