MONROE   Model » KA «


T E C H N I C A L   D A T A    of  the  Electro-Mechanical  Calculator  MONROE  » KA «
**************************************************************************************

Serial Number:      137807    ( Only a Motor ID Plate - No Calculator ID Plate found )

Dimensions:  (ca.)  Width   =  19" /  49 cm
                    Depth   =  17" /  43 cm
                    Height  =  10" /  26 cm  ( with feet )

Weight:      (ca.)  46 lbs  /  6.5 kg

Power Supply:       110 V AC ;  1.2 Amp

Mechanics:          8*10 Full-Keyboard
                    Split-Stepped Drum / Geteilte Staffelwalze 
                    10s Carry Mechanism
                    Counter Stepping Mechanism Animation

Functions:          Add, Subtract, Multiply, Divide
                    Division-Automatic!

Registers:          Input       =   8 Decimals
                    Counter-R   =   8 Decimals 
                    Counter-L   =   8 Decimals (NO 10s-Carry; Neg.Figures RED)
                    Arithmetic  =  16 Decimals
Manufacturer:
                    MONROE Calculating Machine Co.
                    New York / USA
                    1925

H O W   T O   U S E   the  MONROE  » KA «
*****************************************
REMARK: Because Counter-R has 10s-Carry, "Short-Cut"-Multiplication can be performed !
-------
                    See Chapter  » MONROE Model-1 «  ...
R E M A R K S : 
======================================================================================
Friends inherited this old calculator and asked me: "Can you bring it to life again ?"
After removing years of dust from outside  and dust-balls from inside,  application of
WD-40, moving the clogged Split-Steped Drum Codings, ... , Unmount the motor, MAKING A
MANUAL GRIP FOR THE MOTOR AXLE ( in addion to the SILVER KNOB on the right side ), ...
Tuning until ADD & SUBTRACT worked right ...  Example:  37037037 x 9  =  33333333  ...

...  B U T  S O R R Y ,  Repair of AUTOMATIC DIVISION failed because worn-out machine?

H A V E   A   L O O K   I N S I D E  ...
**************************************************************************************

 

 

 

impressum:
**************************************************************************************
© C.HAMANN              http://public.beuth-hochschule.de/~hamann             11/08/12