Perhaps the best example of purely mechanical technology in widespread use today
is the internal combustion engine cooling thermostat. These are used to maintain
the core temperature of the engine at its optimum operating temperature by regulating
the flow of coolant to an external heat sink, usually an air cooled radiator.
Also, research in the 1920s showed that cylinder wear was aggravated by
condensation of fuel when it contacted a cool cylinder wall which removed the
oil film, and the development of the automatic thermostat in the 1930s provided
a solution to this problem by ensuring fast engine warm-up.[3]
From
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