previous <<==>> next

NESTLER   POCKET » ELEKTRO «
( 12.5 cm Scales )



Albert Nestler, Lahr in Baden / Germany                    (1950)
*****************************************************************
                                                      VERSION (A)

SCALES  of  the  NESTLER    P O C K E T    ELEKTRO    Model  0137
=================================================================
Front Side       [ inverse / RED ]                      Back Side
=================================================================
( 0 ...  13 cm Ruler )

   [ Dynamo 20 .. 30 ... 100 ] .. 90 ... 30 .. 20 Motor
     Volt   0.5 .. 0.6  ...  1 .. 2 .. 3  ...  9 .. 10
(A)  kW     X2
-----------------------------------------------------------------
(B)  PS     X2                      (S)     sin(0.1X); sin(0.01X)
[CI]        [1/X]                   (L)     lgX
(C)         X                       (T)     tan(0.1X)
-----------------------------------------------------------------
(D)         X
     cosφ   0.7 .. 0.8 .. 0.9  ...  0.99 .. 0.95
            0.1 .. 0.15 .. 0.2  ...  0.6 .. 0.7

R E M A R K S :                        (  1° = 60' ;   1' = 60" )
=================================================================
The  TRIGONOMETRIC  SCALES  are  divided  in   MINUTES  & SECONDS

S keyed to A/B ;  T keyed to C/D

There are 2 VERSIONS of the MODEL 0137 in the Collection:
( Both came in a leather cases )

Newer (1960) Version (B)
------------------------
The SLIDER is GREEN and the (same) scales are marked A/B,CI,C/D.
The newer CURSOR has an additional HAIRLINE left-up (= Area-Mark)

 

                    Historical Remarks ...
impressum:
*****************************************************************
© C.HAMANN   http://public.beuth-hochschule.de/~hamann   11/01/11