During an illness he read Lamb’s Infinitesimal Calculus which sparked a lifelong fascination with logic and maths.

He attended Roundhay School and then Leeds University, but dropped out of college to join the family firm, Kingfisher (Lubrication) Ltd. Fisher married Elizabeth Stephenson in 1940.

In 1961 the company won a contract with NATO to supply springs and precision components for its 20 mm cannon.

Between 1962 and 1964 he developed various drawing machines from Meccano pieces, eventually producing a prototype Spirograph.

Through the 1980s and 1990s Fisher continued to work with Hasbro in developing new toys and refining Spirograph.