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FABER-CASTELL NOVO-DUPLEX
( 25 cm with 50 cm Scales W1/W1' & W2/W2' )
Have a Look at the POCKET NOVO-DUPLEX
A.W.Faber-Castell, Stein bei Nuernberg / Germany (1974)
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S C A L E S of the FABER-CASTELL »NOVO-DUPLEX« Model 2/83N
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Front Side [ inverse / RED ] Back Side
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T1 tan(0.1X) ; [cot(0.1X)] [LL03] [exp(-X)]
T2 tan(X) ; [cot(X)] [LL02] [exp(-0.1X)]
K X3 [LL01] [exp(-0.01X)]
A X2 [LL00] [exp(-0.001X)]
DF πX W2 sqrt(10X)
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CF πX W2' sqrt(10X)
B X2 [CI] [10/X]
[CIF] [10/πX] L lg(X)/2
[CI] [10/X] C X
C X W1' sqrt(X)
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D X W1 sqrt(X)
[DI] [10/X] D X
S sin(0.1X) ; [cos(0.1X)] LL0 exp(0.001X)
ST arc(0.01X) LL1 exp(0.01X)
[P] [sqrt(1 - (0.1X)2)] LL2 exp(0.1X)
LL3 exp(X)
R E M A R K S : Production Code = 3 74 = March 1974
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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.
Historical Remarks ...
Compare the SCALE DESIGN with
the NESTLER »PRAEZISION«,
the »WICHMANN-1417« ( made by A.N. = Albert Nestler),
the POST-1442 » Dual 10"/5" POCKET-SR « and
the FABER-CASTELL »COLUMBUS/A.Rohrberg«
impressum:
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© C.HAMANN http://public.BHT-Berlin.de/hamann 12/27/07
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