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FABER-CASTELL   » DISPONENT «   111/22
( 25 cm Scales )



A.W.Faber-Castell, Stein bei Nuernberg / Germany               (1967)
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S C A L E S   of  the   FABER-CASTELL    »DISPONENT«     Model 111/22
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Front Side           Scales in [RED] & {GREEN}              Back Side
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( 0 ...  27 cm Ruler )

     ... M A R K S  for non-metric conversions ...
DF       3.6*X     KZ:   K = Start-Kapital,  Z = Zinsen
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[CF]     [3.6*X]           T = Tage               (LL1)    exp(0.01X)
                                                  (LL2)    exp(0.1X)
{CI}     {1/X}     Val.;  p% = Prozentsatz           p% = Prozentsatz
[C]      [X]       E ;     T = Tage               (C)      X
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D        X               Z = Zinsen
L        lgX
Shilling (sh/d)  /  Pound (£)  Conversion Scales

R E M A R K S :                     Production Code = 5 67 = May 1967
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To use the LL-Scales from the back side, the slider has to be turned.

This »DISPONENT« (=Merchant) Slide Rule is made of plastic.
On the BACK SIDE are conversion tables and how to calculate interest.

The DF,[CF]-Scales are folded at  3.6 * X  for Days-of-the-Year.

The formula & translation:

  Zinsen (in % ) = Z = ( K * p * n )/100 ;   n = Jahre = Tage/360

( Z = Interest; K = Capital; p = Interest Rate; n = Years; T = Days )

                    Historical Remarks ...
impressum:
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© C.HAMANN     http://public.beuth-hochschule.de/~hamann     10/23/10