previous <<==>> next

FABER-CASTELL   POCKET - NOVO-DUPLEX
( 12.5 cm with 25 cm Scales W1/W1' & W2/W2' )



A.W.Faber-Castell, Stein bei Nuernberg / Germany       (1965)
*************************************************************
                                                  VERSION (A)

SCALES  of the  FABER-CASTELL NOVO-DUPLEX POCKET  Model 62/83
=============================================================
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]   [10/πX]                        L        lg(X)/2
[CI]    [10/X]                         C        X
C       X                              W1'      sqrt(X)
-------------------------------------------------------------
D       X                              W1       sqrt(X)
ST      arc(0.01X)                     LL1      exp(0.01X)
S       sin(0.1X) ; [cos(0.1X)]        LL2      exp(0.1X)
[P]     [sqrt(1 - (0.1X)2)]            LL3      exp(X)
                              
R E M A R K S :           Production Code = 3 65 = March 1965
=============================================================
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 12.5 cm NOVO-DUPLEX has the PRECISION of a 25 cm Scale

This POCKET SR came in  F.-C.'s green artificial leather case
with the imprints »SIEMENS«  and the logos  »S+H«  &  »S+S« ,
indicating that this SR was a gift of the well known company.


There is a 2nd  » POCKET NOVO DUPLEX «  in the Collection:
**********************************************************

Version (B)
-----------------------------------
Production Code = 9_69 = Sept. 1969

This SR has another CURSOR  and  D- & DF-Scale are not longer
green marked. There are 2 RED-INDEX-MARKS right on W1/W1' and
left on W2/W2' ;  see  DETAIL PICTURE ...

  

Also this POCKET SR was a gift from the  »SIEMENS«  company.

                  Historical Remarks ...
impressum:
*************************************************************
http://public.beuth-hochschule.de/~hamann            08/23/09