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HUGHES-OWENS / HEMMI » 1771 »
( 10" / 25 cm Scales )
H U G H E S - O W E N S / CANADA (1946)
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made by HEMMI / Japan
S C A L E S of the HUGHES-OWENS Bamboo-Based Model 1771
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Front Side [ inverse / RED ] Back Side
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( 0 ... 10" Ruler )
A X2
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B X2 S sin(0.01X); sin(0.1X)
[CI] [1/X] L lgX
C X T tan(0.1X)
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D X
K X3
( 0 ... 27 cm Ruler )
R E M A R K S : ( 1° = 60' ; 1' = 60" )
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The TRIGONOMETRIC SCALES are divided in MINUTES & SECONDS
The SR came in a brown leather case. It is made of bamboo. The
sides are held together with a metal sheet. Its back side is
empty. HEMMI started a year code in 1950. NO CODE was found!
Behind the "SUN"-Logo is a carved-out 1_1/4" LINE - May be the
former(?)TEXT "Made in Occupied Japan" upset the Japanese user?
This dates the slide rule: Made just after WWII in 1946.
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