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FABER-CASTELL   ELEKTRO   ( 25 cm Scales )
Have a look at OLDER VERSIONS ...



A.W.Faber-Castell, Stein bei Nuernberg / Germany           (1961)
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S C A L E S  of the  FABER-CASTELL    » ELEKTRO «    Model 111/98
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Front Side               [ inverse / RED ]              Back Side
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( 0 ...  27 cm Ruler )

LL2    exp(0.1X)
A      X2
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B      X2                              S   sin(0.01X); sin(0.1X);
                                          [cos(0.01X); cos(0.1X)]
[CI]   [1/X]                           L   lgX
C      X                               T   tan(0.1X); [ctg(0.1X)]
-----------------------------------------------------------------
D      X
LL3    exp(X)
       [ "Degree of EFFECTIVENESS" for DYNAMOs & MOTORs ]
       [ "VOLTAGE DROP on Copper Wires" ]
-----------------------------------------------------------------
K      X3

R E M A R K S :                        (  1° = 60' ;   1' = 60" )
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The  TRIGONOMETRIC SCALES  are divided in MINUTES(') & SECONDS(")

S keyed to A/B ;  T keyed to C/D

Model 111/98                     Production Code = 561 = May 1961
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The Slide Rule is made of  plastic.  On its back side  is a table
with mathematical  &  electrical formulas  and (other) constants.
It came in a thin acrylic case.
 
The INSTRUCTION MANUAL (48 pages) can be downloaded from

   http://www.sliderulemuseum.com/SR_Library_Europe.htm

There are   M O R E   V E R S I O N S   in the collection ...

   Older Version              Model 398
   Production Code  =  0_1  = Jan. 1920

   Older Versions        Model 1/98/398
   Production Code  = 38_6  = June 1938
   Production Code  = 40_2  = Feb. 1940

   Older Versions   Models 1/98m & 1/98
   Production Code  = 49_6  = June 1949
   Production Code  = 53_10 = Oct. 1953

                     Historical Remarks ...
impressum:
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© C.HAMANN   http://public.beuth-hochschule.de/~hamann   08/05/12