Electrostatic discharge disc for sound record disc - has centre with radial arms supporting ring with peripheral spikes

摘要

The disc has one or more spikes at or around its periphery and is made of a material that conducts electrically or electrostatically. The spike or spikes are bent towards the record disc. The radial arms from the centre of the disc to its peripheral ring are tapered. The sound record disc is located above the spikes, which are at right angles to the plane of the disc. The advantages of the disc over usual devices for removing electrostatic charge lie in its not damaging the disc and in being simple and cheap.