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ARISTO   ELEKTRO
( 25 cm Scales )




ARISTO-Werke Dennert & Pape, Hamburg / Germany             (1942)
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S C A L E S  of  the   A R I S T O    E L E K T R O     Model 914
=================================================================
Front Side       INSIDE      [ inverse / RED ]          Back Side
=================================================================
( 0 ...  28 cm Ruler )                     ( 0 ...  30 cm Ruler )

E   exp(0.1X)
A   X2
-----------------------------------------------------------------
B   X2            [Scale-i1]           S   sin(0.01X); sin(0.1X);
R   [1/X]                              L   lgX
C   X             Scale-i2 & -i3       T   tan(0.1X)
-----------------------------------------------------------------
D   X
E   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  =  "VOLTAGE DROP on Copper Wires"
   Scale-i2  =  "Degree of EFFECTIVENESS" for DYNAMOs & MOTORs
   Scale-i3  =  "Degree of EFFECTIVENESS" for 3-Phases D. & M.

On the Back Side is a Table with Physical Data & Conversions

Historical Remarks ...

   

Unfortunately this SR was found in a  Flea-Market  without case,
wrong cursor & broken window. Replacement was made of PVC from CD
cases:  The  3  HAIRLINES  are made with a sharp  » X-ACTO «  and
colored with permanent marker  -  AND a CUBIC-MARKER is added  -
Off-Center, because the Cubic-Scale is shifted 1 mm to the right!
"MouseOver" the cursor in the picture to get DETAILED VIEWS ...

impressum:
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© C.HAMANN   http://public.beuth-hochschule.de/~hamann   09/26/10