Comprises a 150 x 150 x 5mm transparent acrylic base with four rubber feet fitted to insulate it from the surface it is sitting on.
When the acrylic base is rubbed with fur, or other suitable charging material, it produces a strong charge which can be repeatedly transferred to a 90mm dia. aluminium plate fitted with an insulated handle.
The aluminium plate can then be used to transfer a charge to other apparatus.
(Wikipedia excerpt:.. “..The (E) consists of a dielectric plate (originally a ‘cake’ of resinous material such as pitch or wax, but in modern versions plastic is used) and a metal plate with an insulating handle.The dielectric plate is first charged through the triboelectric effect by rubbing it with fur or cloth. For this discussion, imagine the dielectric gains negative charge by rubbing, as in the illustration below. The metal plate is then placed onto the dielectric plate. The dielectric does not transfer a significant fraction of its surface charge to the metal because the microscopic contact is poor. “)