Description
Vintage Picket Industries Microline model 140 duplex slide rule with clear indicator manufactured in Santa Barbara, CA. Mid century MCM made in USA collectible school and engineering marking and measuring tool
S C A L E S of the » M I C R O L I N E – 140 «
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Front Side Back Side
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LL0 exp(-0.001X) L lgX
LL00 exp(-0.1X) LL1 exp(+0.01X)
A X2 DF πX
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B X2 CF πX
S sin(0.1X); cos(0.1X) CIF 1/πX
ST arc(0.01X)
T tan(X); tan(0.1X) CI 1/X
C X C X
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D X D X
K X3 LL3 exp(+X)
LL2 exp(+0.1X)
REMARKS:
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The scales LL0 & LL00 are keyed to scale A.
This slide rule is one of the last models made by PICKETT ( and has the typical “Pickett-Yellow” body ).
Pickett (or Pickett & Eckel as they were first known) quickly distinguished themselves with their high quality designs. Well-known for their “eye-saver” yellow surfaces (see below), Pickett was a popular favourite among American slide rule users. They featured an impressive range of specialized rules for a variety of applications along with teaching and student rules.
