Friden 1217

Details:

Friden introduced  this machine while they already had non-printing electronic machines in the market.  It is the last 4-function mechanical machine that was developed by Friden.  The calculation flexibility was high for this type of printing calculator.  It was even sold as machine that was equipped with memory. That’s not really true;  the multiplication control register is made accessible and can serve as memory under some circumstances.  Other manufacturers some similar concepts.

In there adverts Friden also claims that this is “the first printing calculator you don’t have to learn”.  That is probably the reason for a very extended user manual with many many calculation examples ....................... :)



Usage:

Addition/subtraction:   

As usual using the “+” and “-” keys.


Multiplication:

Enter 1st number,  push the ‘X’-button,  enter the 2nd number, then push one of the following keys:

the “=”-key or the “ACCUM=” or the  “NEG=” (or both) or the  “TRANSFER=”  key


Square:

Enter the number,  then push the ‘X²’-key, and next the “=”-key


Division           

Enter the  1st number,  then push the “ENTER DIVIDEND”-key,  next enter the 2nd number and then the  “:“-key . The result is stored in Memory.


Function of some keys, switches etc:

If this isn’t easy, then what is ? ............     (I hope I didn’t make any mistakes)

Nevertheless I highly respect the skills of the engineers who were capable of developing this kind of extremely complex machines!!

Calculator Info Repair information & pictures of internals
P1000418s.jpg P1000427s.jpg P1000420s.jpg
P1000423s.jpg

Click to view a full size picture (opens in a new tab)

Video Assets: adverts, brochures, etc

Serial number:

Build in:

Functions:

Rotation speed:

Market-introduction:

Production until:

Price:


4254A

Ca. 1968

Addition, Subtraction, Full automatic Multiplication,  Division and Square


1967

1969  

DM 2975,-   (Source: Büromaschinen Lexikon)