Pickett N1010-T Duplex Slide Rule

This ten-inch aluminum linear slide rule is coated with white plastic (the "traditional" color). It has a nylon indicator and is held together with stamped aluminum squared posts. The front of the base has K, A, D, and DI scales, with B, ST, T, S, and C scales on the slide. The left end of the slide is marked: MODEL (/) N1010-T (/) TRIG. The left end of the slide bears the style of Pickett logo used between 1958 and 1962. The number 74 appears above the logo.
The back of the base has DF, D, DI, and L scales, with CF, CIF, CI, and C scales on the slide. The left end of the slide is marked: COPYRIGHT 1959 © (/) PATENT APPLIED FOR. The right end of the slide is marked: PICKETT & ECKEL, INC. (/) 272.
The slide rule fits into a clear plastic bag and then into an orange-brown leather case lined in clear plastic. The triangular Pickett logo is embossed below the slot for the case's flap, and there is a metal ring on the back of the case for attaching to a belt. The slide rule arrived in a white, black, red, and yellow cardboard box. The 1958-1962 Pickett logo is superimposed on a model of the atom on the box. The top and bottom of the box are marked with several of the instrument's selling points: lifetime accuracy, all metal permanence; select a handy pocket size rule too (/) matched for your convenience by Pickett; micro divided scales; world's most accurate; safety liner case; completely guaranteed; complete instruction manual; slider tension springs.
Inside the box are four pieces of paper: a welcome note from company president John W. Pickett, marked Form 247; care instructions for the rule, marked Form 543; a guarantee, which indicates this instrument has serial number 252372; and a promotional flyer on Pickett's "eye-saver" yellow color, marked Form 225-A. See 1993.0559.01.01 for an instruction manual received in the box. One end of the box is marked: Pickett SLIDE RULE (/) all metal • guaranteed (/) A PRODUCT OF AMERICAN ENGINEERING AND MANUFACTURING. The other end of the box has a product label, which notes the Model N-1010-T Trig Slide Rule has the: Approved Scale Arrangement for basic work in all fields (Schools, Business, Industry) where Log Log scales are not needed.
The logo, nylon indicator with flat lens, straight style of posts, and company addresses in Chicago and Alhambra, Calif., are all consistent with a date around 1960. However, according to the donor, the slide rule was given to him by his parents as a Christmas gift in 1944.
References: Alan Boardman, "Recollections of a Pickett Industries Employee," Journal of the Oughtred Society 16, no. 2 (2007): 8; Walter Shawlee, "Pickett Slide Rules," http://www.sphere.bc.ca/test/pickett.html; Dieter von Jezierski, Slide Rules: A Journey Through Three Centuries, trans. Rodger Shepherd (Mendham, N.J.: Astragal Press, 2000), 75–76.
Currently not on view
date made
ca 1960
Pickett & Eckel, Incorporated
place made
United States: California, Alhambra
Physical Description
aluminum (overall material)
plastic (cursor material)
leather (case material)
paper (case material)
overall: 3.2 cm x 33.8 cm x 9.2 cm; 1 1/4 in x 13 5/16 in x 3 5/8 in
ID Number
accession number
catalog number
Credit Line
Gift of D. L. Leary
Rule, Calculating
General Calculation
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Slide Rules
Data Source
National Museum of American History, Kenneth E. Behring Center


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