TECHNICAL DATA     of the  Electro-Mechanical  Printing-Calculator
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Model:             ASTRA (E)                                 10/11

Serial Number:     72207

Dimensions:  (ca.) Width   =   7_1/2 " /  19 cm
                   Depth   =  13_1/2 " /  35 cm
                   Height  =   6_3/4 " /  17 cm

Weight:      (ca.) 12 lbs  /  5.5 kg

Power Supply:      220 V AC

Mechanics:         10-Keyboard ( modified DALTON-Type )
                   Serial-to-parallel Conversion
                   *) Rocking Segment Mechanism

                   Black Nylon Ribbon (= Typewriter):
                   1/2" * 16'  /  13 mm * 10 m
                   Paper Roll (Standard):
                   2_1/4" * 2_3/4" * 165'  (W * D * L)
                   57 mm  * 65 mm  * 50 m  (B * D * L)

Functions:         Add, Subtract,
                   NonAdd, Repeat, Subtotal, Total

Registers:         Input       =  10 Decimals  ( = lower DISPLAY )
                   Arithmetic  =  11 Decimals  ( = upper DISPLAY )
                   Printing    =  12 Characters
Manufacturer:
                   ASTRA WERKE AG
                   Chemnitz / (East-)Germany
                   1930

H O W   T O   U S E   the  ASTRA
*********************************

ENTER A NUMBER:
---------------
The actual number of digits entered shows on the window above the
keyboard. If wrong digits are entered, push the left silver lever
to clear the keyboard.

ADDITION & Subtraction:
-----------------------
Everytime a number is entered and the keys [+] or [-] are pressed,
the number is printed and added/subtracted to/from the memory.

REPEAT:
-------
To enter the same number more than once, press & push the key [R]
before the keys [+] or [-] are pressed. The keyboard will not be
cleared after printing & calculating cycle. To release the [R] key:
Press & pull it before the next cycle.

NON-ADD:
--------
Enter the item number and press the key [#]. This item number is
printed, but it is not part of the addition/subtraction cycle. 

SUBTOTAL:
---------
The cumulated sum will be printed when the key [◊] is pressed.
The memory will hold the actual sum.

TOTAL:
------
The total sum will be printed when the key [*] is pressed.
The memory will be cleared.

CHANGING THE PAPER ROLL:
************************
Pull the silver holder and lift the paper roll with the axle.

CHANGING THE RIBBON:
********************
Open the silver locks and observe how the ribbon is spooled!

CLEANING THE FONTS
******************
The printing unit is mounted with 4 screws from the back side.
The unit is removable and all fonts are accessible!

PRINTOUT - Example          with Comments:
******************************************

^^^^^^^^^^^^^^^^^^^^^   To clear memory:
|                *  |   Press [*=Total]
|                   |
|                   |                < Max.Input = 10 decimals > 
|  98.765.432,10    |   Enter (1st) number, Press [+]
|  87.654.321,09    |   Enter (2nd) number, Press [+]
| 186.419.753,19 ◊  |   Press [◊=Subtotal] to print sum
|                   |
|           1,23 -  |   Enter (neg.)number, Press [-]
| 186.419.751,96 ◊  |   Press [◊] to print cumulated sum
|                   |
|           4,56    |   Set [R=Repeat], Enter number, Press [+]
|           4,56    |   Release [R], Press [+] 
| 186.419.761,08 *  |   Press [*] to print total sum 
|                   |               < Max.Output = 11 decimals >
|                   |
|                *  |   Press [*], Memory is clear
|                   |
|             47 #  |   Enter ID #47, Press [#=NonAdd]
|       6.789,00    |   Enter value, Press [+]
|             11 #  |   Enter ID #11, Press [#]
|       5.432,00    |   Enter value, Press [+]
|      12.221,00 *  |   Press [*] to print total sum of values
|                   |   
|                *  |   Memory is clear
|                   |
|             12    |   Enter number
|             24 -  |   Enter (larger negative) number
| 999.999.999,88 *  |   Negative sum as 9s-Complement
|                   |
^^^^^^^^^^^^^^^^^^^^^

R E M A R K S :
==================================================================
*) It is a "Modified Rocking Segment Mechanism ":  Pressing a key
   let the INPUT DISPLAY DIGIT fall in place. When all digits are
   entered ("serial"), SENSORS test their POSITIONS  and arrange
   the GEAR SEGMENTS accordingly for the ("parallel") INPUT CYCLE.

ASTRA was the first company with a 10-Block Keyboard in Europe.

                 Have a look at "Calculating Trickies" ...
impressum:
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© C.HAMANN       http://public.BHT-Berlin.de/hamann        02/22/08