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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
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Front Side INSIDE [ inverse / RED ] Back Side
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( 0 ... 28 cm Ruler ) ( 0 ... 30 cm Ruler )
E exp(0.1X)
A X2
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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)
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D X
E exp(X)
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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
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 ...
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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 ...