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 ```