Cast iron presure cooker, 1850-1870.
© Science Museum / Science & Society Picture Library
Cast iron presure cooker of four quart capacity, with latches to secure the lid and steam release safety valve in centre of lid, made by E Pugh and Co of Wednesbury, Staffordshire. This is an example of a very early presure cooker, which would have been an expensive novelty purchase. Although the presure cooker was invented by Frenchman Denis Papin in 1681, they didn't become popular household appliances until the mid 20th century.