Richardson’s Pantocrat Six In One slide rule

Made 1912-1920

Over the 19th and much of the 20th centuries the slide rule was the primary instrument for calculation used by many people engaged in the trades and in engineering. Although originally invented in the 17th century, and widely used for gauging (or estimating the quantities of certain products such as alcoholic spirits) it took until around 1850 for the slide rule to become generally popular.

This slide rule is an example of a unique construction of the slide rule. In order to produce a device w...


Slide rule with case, Richardson's Pantocrat Six-In-One, metal / leatherette, made by the Richardson Slide Rule Company, Chicago, Illinois, United States of America, 1912-1920

Richardson's Pantocrat Six In One Slide Rule, 28cm metal stock with 5 interchangeable slides. The stock and each slide has a folded tin backing with a white painted tin rule inserted into it. The scales are printed onto the white painted surface. The slides are then inserted into the stock as required for the calculation to be performed. In dark leather (snakeskin-look) case with gilt lettering.
US Patent 1911/1/31 & 1912/3/26
Missing cursor and possibly one slide.

Stock, upper: Sin, A,
Slides, interchangeable:
1776: B, CI, C
1812: B, +-, C
1860: D2, CI, %
1860 LL: C, LL1, LL2, LL3 (folded at e) - Richardson's Logometric Slide
1865 O: C, CI, R - Engineer's Binary Polymetric Slide
Stock, lower: D, Tan, Log (equal parts)

Mfr: Richardson Slide Rule Co, Chicago, Illinois.


42 mm
6 mm




Donated through the Australian Government Cultural Gifts Program in memory of Associate Professor Allan Bromley, 2010
20 January, 2010

Cite this Object

Richardson's Pantocrat Six In One slide rule 2016, Museum of Applied Arts & Sciences, accessed 24 July 2017, <>
{{cite web |url= |title=Richardson's Pantocrat Six In One slide rule |author=Museum of Applied Arts & Sciences |access-date=24 July 2017 |publisher=Museum of Applied Arts & Sciences, Australia}}
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