What the work is
Russell Hobbs introduced the K1 automatic electric kettle in 1955. Its defining feature was an automatic shutoff mechanism, rather than electric water heating by itself.
Wikipedia’s account of Russell Hobbs says the company was founded in 1952 by William Russell and Peter Hobbs, with Russell on design and engineering and Hobbs on marketing and sales. Both had worked for Morphy Richards. In 1952 they designed the CP1 automatic coffee percolator, and the K1 followed in 1955 as the first electric kettle that switched itself off as soon as the water boiled.
How it was made
Steam reached a bimetallic strip near the rear of the kettle. The strip actuated a switch that turned off the appliance, connecting a physical consequence of boiling to control of the electrical heating process. The K1 was designed in October 1955.
What works
The design closed a loop between the task and its completion. Heating water no longer depended solely on a person noticing the boil and operating the switch at that moment.
What does not
An automatic endpoint is only one part of a kettle’s usability. Filling, lifting and pouring remain separate interactions; the shutoff mechanism alone does not establish how well the whole appliance performs those tasks.
What it influenced
The K2 followed in 1960 and remained in production for decades. Later Russell Hobbs models explored new materials and forms, showing that control, enclosure and handling could continue to develop independently.
The next steps are documented. In 1972 the company produced what Wikipedia calls the world’s first all-plastic kettle, the Futura, designed by Julius Thalmann. It kept the traditional kettle shape, was spout-filled and had an external liquid level indicator. It sold at the expensive end of the market and was well reviewed, but did not sell well as the 1970s went on. The plastic used, Noryl, was found to discolour with heat after regular use, the kettle was slow to boil, and the spout-filling design prevented a view inside to confirm the kettle was clean. In 1978 the company changed the plastic to Kematal, which had greater heat resistance, but sales did not greatly improve and the model was discontinued in 1979, when Redring’s tall Autoboil jug kettle arrived.
The company’s new 1980s kettles were switched off by a thermistor, and its new plastic jug kettles began around 1983. In 1996 the Millennium 1.7 L kettle used a 3000 W/240 V printed thick film OPTEC flat disc element, which boiled water in about half the time, with a limescale filter.
Is it worth your time
Worth studying for appliance design. Diagram the sequence from heat to steam to switch and compare it with the user’s actions. The important feature is a change in behaviour, even when the product remains recognisably a kettle.
