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



Have a look at a Newer Version ...

A.W.Faber-Castell, Stein bei Nuernberg / Germany          (1953)
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S C A L E S  of  the  FABER-CASTELL    » ELEKTRO «    Model 1/98
================================================================
Front Side      INSIDE      [ inverse / RED ]          Back Side
================================================================
( 0 ...  27 cm Ruler )

LL2    exp(0.1X)
A      X2
----------------------------------------------------------------
B      X2         Scale-i1            S   sin(0.01X); sin(0.1X);
                                         [cos(0.01X); cos(0.1X)]
[CI]   [1/X]                          L   lgX
C      X         [Scale-i2]           T   tan(0.1X); [ctg(0.1X)]
----------------------------------------------------------------
D      X
LL3    exp(X)
----------------------------------------------------------------
K      X3

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

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

There are 2 scales INSIDE of the body for calculating ...
   Scale-i1  =  "Degree of EFFECTIVENESS" for DYNAMOs & MOTORs
   Scale-i2  =  "VOLTAGE DROP on Copper Wires"

Model 1/98                   Production Code = 53_10 = Okt. 1953
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This Model  »1/98«  is made of  box wood.  On its back side is a
table  with mathematical  & electrical formulas,  constants  and
instructions.  It has a red "Cu"-Mark on A-Scale  and the "735"-
Mark is changed ( instead 736 ).  On the back side of the slider
also "ctg" is marked red. This SR has an acrylic cursor. It came
in a green cardboard 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 ...

 

 

Model 1/98m                   Production Code = 49_6 = June 1949
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This OLDER MODEL  » 1/98m «  is made of peach wood and came in a
damaged black cardboard case. Scales are the same but it has the
mark "736" on A-Scale and red & black "Cu"-Marks on D-Scale. The
CURSOR is different.  On the back side  is a table with  math. &
electrical formulas, constants & instructions.  

   Older Version             Model 378
   Production Code =   0_1 = Jan. 1920

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

   Newer Version          Model 111/98
   Production Code =  561  =  May 1961

                    Historical Remarks ...
impressum:
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© C.HAMANN   http://public.beuth-hochschule.de/~hamann   11/12/13