Pocket calculator

Object/Artifact

-

Waterperry Museum

The Otis King's Pocket Calculator

The Otis King's Pocket Calculator

Name/Title

Pocket calculator

Entry/Object ID

2025.1.157

Description

Otis King's Patent Pocket calculator. Scale N423.

Context

Cylindrical Pocket Slide Rule with Helical Scales, Made in England by Carbic Ltd., London 1921-1972. Patent 183723. It was designed by Otis Carter Formby King (1876–1944) who was a grocer and electrical engineer.

Category

Domestic

Acquisition

Accession

2025.1

Source or Donor

Gordon Dempster

Acquisition Method

Transfer

Made/Created

Manufacturer

Carbic Ltd, London, UK

Date made

1960

Dimensions

Width

30 mm

Length

150.5 mm

Weight

212 g

Dimension Notes

The length extended is 28 cm

Material

Brass, Chrome

Condition

Overall Condition

Good