Tekniska Museet
100 Innovations - Tekniska museet

An exhibition at the National Museum of Science and Technology in Stockholm, 2012 – 2018

The adjustable spanner

The adjustable spanner

Ingress för att beskriva innovationen

The adjustable spanner

This adjustable spanner is one of those used at the National Museum of Science and Technology every day. Photo: Anna Gerdén.

The adjustable spanner

Adjustable spanner head with a screw set for moving the spanner jaw. Photo: Truls Nord.

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Kort fakta (2) om innovationen

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The adjustable spanner

What would Mr. Green have done with the adjustable spanner in the library? In the game Cluedo the tool is a classic murder weapon but JP Johansson´s invention in 1892 is also one of the most successful Swedish innovations ever.

During the 1800s the engineering industry developed. There were nuts and bolts of all possible sizes and everything required different spanners. What was fantastic about JP Johansson´s spanner was that it was adjustable and could be adapted to fit various dimensions. The adjustable spanner has now existed for 120 years but has not changed much.

Danes call the adjustable spanner svenskøgle and in Russia they say sjvedik, which means little Swede.

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