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ARISTO   POCKET   SIMPLEX   ( 12.5 cm Scales )



   

ARISTO-Werke Dennert & Pape, Hamburg / Germany            (1951)
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S C A L E S  of the  ARISTO-POCKET    S I M P L E X    Model 812
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Front Side                                             Back Side
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( 0 ...  13 cm Ruler )

   A     X2
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   B     X2                       S     sin(0.01X); sin(0.1X)
                                  ST     arc(0.01X)
   C     X                        T      tan(0.1X)
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   D     X

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

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

Production Code = 51_2 = Hamburg, 1951, Lot 2

It came in a WORN-OUT LEATHER CASE  with a  BROKEN SPRING in the
cursor and the  MISSING TRIGONOMETRIE WINDOW  on the back side -
All restored!  The  I N S C R I P T I O N  on the  INNER BODY is
» Nr.16 KLAWUN, Hannover «   Ref. to the print  on the BACK SIDE
this Pocket Slide Rule was a gift from a  » MFD «  company.

            Historical Remarks ...

R E M A R K S:   HOW  TO  RE-SEW  THE  LEATHER  CASE ...
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With  scissors & tweezers,  remove the old threads.  Use a heavy
duty thread about 4-times longer. NEEDLES on  B O T H   E N D S.
Start with equal long halfs.  Go through the EXISTING HOLES from
both sides ( mutual right/left ). Tighten after every twin-loop.
At the end go back 3-times and cut close.

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