What safety feature was perfected over time to prevent the kettle from boiling dry?
Answer
Automatic shut-off mechanism.
Safety improvements were a key focus in the design evolution of the electric kettle. The automatic shut-off mechanism evolved into a critical, non-negotiable feature because it directly addressed the danger of the appliance boiling dry. This feature automatically deactivates the heating element when all the water has boiled away, thereby preventing potential damage to the kettle itself or reducing the risk of fire hazards.
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