Keuffel & Esser N4080-3 (1) Greg's Slide Rules
 Images
 
Front Left

Front Right

Back Left

Back Right

Edge


Keuffel & Esser N4080-3 (1) - Notes



  1. I believe that this rule probably dates from roughly 1949, the serial number is too early for 1950 and this revised model with all the details on the edge was introduced in that year. For K&E serial number dating use the link here to Ed Chamberlain's reference set of dating curves.
  2. This model appeared in the 1949 K+E catalogue but was replaced by the 4080-3 by the 1954 catalogue.
  3. This model differs only slightly from the 4081 series in that this model has the trigonometrical scales divided in degrees and minutes whereas the 4081 series has these scales divided to represent degrees and decimals of a degree.


Details



Further details about this Slide Rule:

Brand Keuffel & Esser
Model N4080-3 Log Log Duplex Trig
Country of Manufacture USA
Scales Front LL02, LL03, DF [CF, CIF, CI, C] D, LL3, LL2
Scales Back LL01, K, A [B, T, ST, S] D, L, LL1
Number of Scales 20
Slide Rule Materials Wood/Celluloid
Cursor Materials Metal/Glass
Cursor Lines 1 Front, 1 Back
Scale Length 25 cm
Length 31.7 cm
Width 4 cm
Condition Good
Documentation None
Accessories Leather and composite case


Last updated: 2002-09-28 22:00 AEST
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