The term teleforce refers to Nikola Tesla's macroscopic charged particle beam projector. The device was based upon a large Van de Graaff generator of unique design and a special type of open-ended vacuum tube. It comprised a system for the acceleration of minute tungsten or mercury particles to a velocity of about 48 times the speed of sound. The projectiles were propelled out of the tube by electrostatic repulsion. According to Tesla produ...