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FABER-CASTELL NOVO-DUPLEX
( 25 cm with 50 cm Scales W1/W1' & W2/W2' )
Have a Look at the NOVO-DUPLEX 2/83N
A.W.Faber-Castell, Stein bei Nuernberg / Germany (1970)
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VERSION (B)
SCALES of the FABER-CASTELL » NOVO-DUPLEX « Model 2/83
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Front Side [ inverse / RED ] Back Side
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K X3 [LL03] [exp(-X)]
T1 tan(0.1X) ; [cot(0.1X)] [LL02] [exp(-0.1X)]
T2 tan(X) ; [cot(X)] [LL01] [exp(-0.01X)]
DF πX W2 sqrt(10X)
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CF πX W2' sqrt(10X)
[CIF] [1/πX] L lg(X)/2
[CI] [1/X] C X
C X W1' sqrt(X)
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D X W1 sqrt(X)
S sin(0.1X) ; [cos(0.1X)] LL1 exp(0.01X)
ST arc(0.01X) LL2 exp(0.1X)
[P] [sqrt(1 - (0.1X)2)] LL3 exp(X)
R E M A R K S : Production Code = 10 70 = October 1970
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Because the scales W1/W1' start at 1 and end at sqrt(10)
and the scales W2/W2' start at sqrt(10) and end at 10
the 25 cm NOVO-DUPLEX has the PRECISION of a 50 cm SlideRule
The slide rules is shielded in an acrylic box. A ruler with
physical constants and conversion factors belongs to the set
together with an instruction booklet.
There is an older Version (A) in the Collection
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Production Code = 6_63 = June 1963
o On Front the Scales ST & S are switched
o There are no Rubber Feet on the Side Bars
o The Cursor looks different
o The Slide Rule came in an Acrylic Case
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