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FABER-CASTELL   POCKET-DARMSTADT   67/54Rb
( 12.5 cm Scales )
with a build-in ADDIATOR on its back side





A.W.Faber-Castell, Stein bei Nuernberg / Germany         (1971)
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SCALES  of the  FABER-CASTELL POCKET-DARMSTADT    Model 67/54Rb
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Front Side             [ inverse / RED ]              Back Side
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( 0 ... 14 cm Ruler )

L        lgX
K        X3
A        X2
---------------------------------------------------------------
B        X2                                  LL1     exp(0.01X)
[CI]     [1/X]                               LL2     exp(0.1X)
C        X                                   LL3     exp(X)
---------------------------------------------------------------
D        X
[P]      [sqrt(1 - (0.1X)2)]
S        sin(0.1X) ; [cos(0.1X)]
T        tan(0.1X) ; [cot(0.1X)]

R E M A R K S :             Production Code = 3_71 = March 1971
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              To use the LL-Scales, the slider has to be turned

The slide rule came in a green leather case (w.zipper). Inside
is a place for the STYLUS to operate the  build-in ADDIATOR  on
its back side. This ADDIATOR is able to show  t r u e  negative
results in its lower window.  On the upper end of the ADDIATOR
are mathematical constants and formulas and on its lower end
are US/Metric conversions printed.

Historical Remarks ...

For a more detailed picture click on  Model 67/54b ...

impressum:
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http://public.beuth-hochschule.de/~hamann              02/17/08