Ahmed wrote:I understood that it was paraffin or other similar bodies and that this device exploited the change of solid / liquid phase; it would be consistent with a trigger at a given temperature, while a dilation is linear ...
yes indeed any change of state from solid to liquid is accompanied by an increase in volume (except for water) and paraffin it would correspond well, not being a pure body it changes state on a beach of temperatures and not at a fixed temperature
after following the mixture must be able to have ranges of different values indeed, after it is a question of leverage to have a large opening with a small displacement, which requires a big couple, so we gain in offset but we loses strength