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RESULTA - BS7
Have a look at the RESULTA-7



An old PEN is used as a STYLUS
T E C H N I C A L   D A T A   of the Mechanical Calculator  RESULTA-BS7
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          Clearing Crank with VISIBLE LOCK against turning in (S) State

Dimensions:   (ca.)  Width   =  3_1/2" /   9 cm
                     Depth   =  6    " /  15 cm
                     Height  =  4_3/4" /  12 cm

Weight:       (ca.)  3 lbs  /  1.4 kg

Mechanics:           Setable Counter with Input Display

Functions:           Add, Subtract

Registers:           Input          =  7 Decimals
                     Input-Display  =  7 Decimals
                     Arithmetic     =  7 Decimals
Manufacturer:
                     Paul Bruening
                     Berlin
                     West Germany
                     1954

H O W   T O   U S E    the  RESULTA-BS7
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CLEAR THE ARITHMETIC UNIT:
--------------------------
Make sure the left vertical lever on front is set to (A) ADDITION.
If not, push it to the right to release the lock and move it from
(S) SUBTRACTION to (A).  Pull and turn the little crank on the
right side clockwise one rotation.

ENTER A NUMBER:
---------------
Use a pen and pull-down the appropriate number. Depending of the
left vertical lever on front, the input is (A) ADDED or (S)
SUBTRACTED. The result is visible in the arithmetic unit.

INPUT CHECK:
------------
When the lever on the right side is set counter-clockwise, the input
will stay and show the number entered in the lower display.  Before
entering a new number, press the bar on front to release the input
segments. If the lever is set clockwise, the release bar on front is
locked down and each input segment snaps back immediately.

NEGATIVE RESULTS:
-----------------
Negative results are displayed in the arithmetic unit as the
COMPLEMENT of the next higher 10, 100, 1000, ...

Example:   -12  =  9...988

As with all OLD RESULTAs, this »BS7« get blocked, when a neg. number is
entered as a start value ( because too many 10s-Carries are involved ).

REMARK:  "1154" = Nov.1954 = PRODUCTION-Code is scratched in the bottom

impressum:
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© C.HAMANN      http://public.beuth-hochschule.de/~hamann      05/10/09