A.W.Faber-Castell, Stein bei Nuernberg / Germany (1970) ************************************************************ VERSION (B) SCALES of the FABER-CASTELL » NOVO-DUPLEX « Model 2/83 ============================================================ Front Side [ inverse / RED ] Back Side ============================================================ 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) ------------------------------------------------------------ CF πX W2' sqrt(10X) [CIF] [1/πX] L lg(X)/2 [CI] [1/X] C X C X W1' sqrt(X) ------------------------------------------------------------ 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 ============================================================ 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 ----------------------------------------------- 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 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: ************************************************************ © C.HAMANN http://public.BHT-Berlin.de/hamann 08/10/08 |