This section is from the book "The Engineer's And Mechanic's Encyclopaedia", by Luke Hebert. Also available from Amazon: Engineer's And Mechanic's Encyclopaedia.
Tympanum or Tympan. In Mechanics, a kind of wheel placed round an axis, or cylindrical beam, on the top of which are two levers for turning the axis, and therewith the weight required.
© 2007-2021 StasoSphere.com