I know that the air pressure affects the aneroid capsule by making it expand and contract slightly, but how do the mechanisms inside display it on the face of the instrument?
In: Engineering
levers magnify the motion of the capsule, the linear movement of the last lever is attached to a tiny chain that is wrapped around the shaft of the pointer.
The inside of an aneroid barometer is a little copper box. When pressure rises, this little copper box starts to get compressed. This capsule is attached to a bunch of tiny levers which move the needle as the air pressure squeezes it.
It is not very accurate, especially compared to mercury.
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