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FABER-CASTELL   DARMSTADT   ( 25 cm Scales )



A.W.Faber-Castell, Stein bei Nuernberg / Germany      (1937)
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                                                 VERSION (A)

S C A L E S  of the FABER-CASTELL  » DARMSTADT «  Model 1/54
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Front Side       [ inverse / RED ]                 Back Side
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( 0 ...  27 cm Ruler )

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

R E M A R K S :
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There are 3 Versions in the Collection:
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VERSION (A)  Production Code = 37_12 = Dec. 1937

This historic wooden model came in a black cardboard case.
It has instructions how to use the slide rule on its back.
In the body under the slider is a 34 ... 56 cm ruler.

VERSION (B)  Production Code = 55_2  = Feb. 1955
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The scales are glued only and have no longer "Fix-Points". 
The CURSOR has changed  and the LOGO "CASTELL" is printed.
The data sheet on its back side is the same as in Vers.(A)
The slide rule came in a green cardboard case.

Have a look at the NEWER VERSION (C) in this collection ...

                  Historical Remarks ...
impressum:
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http://public.beuth-hochschule.de/~hamann           06/12/10