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THALES   GEO/R



Have a look at the  THALES  MEZ ...
Have a look at the  THALES  CER ...
Have a look at the THALES »KA« ADDING MACHINES ...
T E C H N I C A L   D A T A   of the Mechanical Calculator  THALES  »GEO/R«
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Serial Number:       GEO 159884                   ( right on base / front )

Dimensions:   (ca.)  Width   =   16_1/2" /  42 cm
                     Depth   =    9    " /  23 cm
                     Height  =    6_1/2" /  17 cm

Weight:       (ca.)  31 lbs  /  14 kg

Mechanics:           Pin-Wheel / Sprossenrad
                     10s Carry Mechanism

Functions:           Double-Calculator for Geo-Data Calculations
                     Add, Subtract, Multiply, Divide
                     Back-Transfer / Rueckuebertragung ( also cross-over !)

Registers:           Counter     =  2 x  8 Decimals (on Top)
                     Input       =  2 x  9 Decimals
                     Arithmetic  =  2 x 13 Decimals
Manufacturer:
                     THALES-WERK 
                     Rastatt / Baden
                     Germany
                     1960

H O W   T O   U S E   the  THALES  GEO/R
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The DOUBLE CALCULATOR is symmetrical shaped. Each calculator works like the
THALES-CER.  The BACKTRANSFER-Lever (RED TOP) is located down behind crank.
Because the CARRIAGE is "shiftable through", it is possible to BACKTRANSFER
the content of the RIGHT ARITHMETIC to the LEFT INPUT-UNIT  and the content
of the LEFT ARITHMETIC to the RIGHT INPUT-UNIT.  The DIRECTIONS OF COUNTING
are settable independent: Equal, Non, Counter-directionional  ---  Also the
way the ARITHMETIC-UNITS working ref. to the CRANK(+/-)DIRECTION: Add./Sub.
The COUNTERs & ARITHMETICs are pre-settable with affiliated toothed wheels.

E X A M P L E :       ( 987 - 6 )*54 - ( 321 + 9 )*54  =  35154
                        ===              ===
           assume in    AL      and      AR    are INTERMEDIATE RESULTS ...

Pre-Set ARITHMETICS                           AL =   987  &  AR =   321
Set INPUT-UNITS                               IL =     6  &  IR =     9
Set LEFT DIRECTION-Lever to MINUS 
Make ONE POSITIVE CRANK-Turn                  AL =   981  &  AR =   330
BACKTRANSFER   AL -> IL  &  AR -> IR
                                              IL =   981  &  IR =   330
                                              AL =     0  &  AR =     0
Set LEFT DIRECTION-Lever back to PLUS 
Clear COUNTING-UNITS                          CL =     0  &  CR =     0 

M U L T I P L I C A T I O N :
Shift Carriage right to Position 2; Make 5 POSITIVE CRANKs 
Shift Carriage left  to Position 1; Make 4 POSITIVE CRANKs 
Clear   IR = 0                                CL =    54  &  CR =    54
                                              AL = 52974  &  AR = 17820
S U B T R A C T I O N :
Shift Carriage so, that AR is under IL 
BACKTRANSFER   AR -> IL                       IL = 17820  &  IR =     0
Shift Carriage back to "normal" Position      AL = 52974  &  AR =     0
Make ONE NEGATIVE CRANK-Turn                  AL = 35154
                                                   =====

   Further INFO see ...  http://www.rechnerlexikon.de/artikel/Thales_Geo

INSIDE VIEW: With the BIG KNOB right on top a PAPER-HOLDER is to flip up ...
   ... thread-in the DUAL-POSITION-MARKERs before TOP-COVER replacement !!!
                                        ( see MARKS [ >>>>> ] & [ >>>>> ] )
impressum:
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© C.HAMANN        http://public.beuth-hochschule.de/~hamann        04/14/17