Otis King's Patent Calculator

Contributed by sdr

Otis King's Patent Calculator

I bought this calculator in 1962 when I started an undergraduate course in Chemistry.

The helical scale around the cylinder form enabled calculations to be made with the same accuracy as would be possible with a very long slide rule.

It was a required tool for Science and Mathematics students in the early 1960s but was the last of its kind as it was rapidly rendered obsolete with the advent of pocket electronic calculators.

Comments are closed for this object

Most of the content on A History of the World is created by the contributors, who are the museums and members of the public. The views expressed are theirs and unless specifically stated are not those of the BBC or the British Museum. The BBC is not responsible for the content of any external sites referenced. In the event that you consider anything on this page to be in breach of the site’s House Rules please Flag This Object.

About this object

Click a button to explore other objects in the timeline


54 Dundonald Road, LONDON SW19


Early 1960s


View more objects from people in Hereford & Worcs.

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.