Diameter   =  2  "
         ( 50 mm )
Thickness  =  1/2"
         ( 13 mm )



B O X  =

2 3/8" * 2 6/8" * 1 1/8"
 60 mm *  70 mm *  28 mm

MOSCOW  Research Institut for Control Equipment   Model  »KL-1«
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DEPARTMENT of Equipment for Automation & Control  / USSR (1966)

The KNOB with the BLACK DOT   t u r n s   the  FRONT SCALE
The KNOB with the RED DOT  turns the POINTERS  ON BOTH SCALES
A FIXED INDEX  is under the  "BLACK DOT" KNOB  ON FRONT SCALE

Front Scales:                                   T U R N A B L E
===============================================================
(a) X2                           Outer Scale   1 ... 10 ... 100
(b) X                            Inner Scale   1 ... 10

Back Scales:
===============================================================
(c) X                            Outer Scale   1 ... 10
(d) sin(0.1X)                                  5°45' ... 90°
(e) tan(0.01X .. 0.1X)           Spiral        1°    ... 45°


R E M A R K S :                      (  1° = 60' ;   1' = 60" )
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The TRIGONOM. SCALES  are divided  in   MINUTES(') & SECONDS(")

SCALE (c)  is   R E C I P R O C A L   refering  to  (b) SCALE:

            1/X    (c) <===> (b)    X

This clever design allows ...

I N S T R U C T I O N S   for   » Short-Cut «  -  Calculations:
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LIST OF ABBREVIATIONS:  BM = Black Mark on front
                        BK = Black Knob turns front scales
                        RK = Red Knob turns on both sides the
                        RP = Red Pointer(s)
---------------------------------------------------------------
(1)
MULTIPLICATION 2*3 = 6  Set RP over X=2 on Scale(c) with RK
                        With BK set X=3 on Scale(b) under RP
               RESULT:  Read X=6 on Scale(b) under BM
                             ===
(2)
DIVISION       6/3 = 2  Set X=6 of Scale(b) under BM with BK
                        Set RP over X=3 on Scale(b) with RK
               RESULT:  Read X=2 under RP on opposite Scale(c)
                             ===
(3)
DIAMETER  => CIRC-AREA  Set MARK "C" on Scale (b) under BM
                        Set DIAMETER with RP on Scale (b)
                        Set MARK "1" of Scale (a) under BM
               RESULT:  Read AREA under RP on Scale (a)

            ( Example:  DIAMETER = 2   ==>   AREA = π )
impressum:
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© C.HAMANN     http://public.BHT-Berlin.de/hamann      03/28/10