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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
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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. ...
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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.