Pickett 120 & 121-T  
Written by Accutron on 2017-07-05  

Devices included in this entry:

Pickett 120 Trainer 10" polyphase slide rule
Pickett Microline 121-T 10" polyphase slide rule (pictured in thumbnail)


In the 1960s, Pickett began manufacturing low-cost plastic student slide rules under the Microline brand name. Their first model was the 120 Trainer, introduced in 1964. The 120 Trainer is a 10" simplex polyphase slide rule with a non-reversible slide. Pickett later upgraded the 120 Trainer by adding conversion tables to the reverse side, creating the Microline 121-T. Early Microline slide rules have a 1.5" body and similar proportions to a Pickett aluminum slide rule, while later examples have a 1.9" body and a more robust cursor construction, and were available in white or Eye-Saver yellow variations.

Available Scales: K A [B T Cot S Cos CI C] D L (T/Cot and S/Cos reversed in later examples)

Pickett 120 Trainer simulation, adapted from the Virtual Slide Rule script by Derek Ross.



Pickett 120 Trainer simplex polyphase slide rule.


Pickett Microline 121-T simplex polyphase slide rule, obverse view.


Microline 121-T slide rule, reverse view.

This article is part of the [Slide Rules] exhibit.

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