US Patent 8101876 Electro-mechanical pulse generator

An electromechanical pulse generator and a method of generating electrical pulses are disclosed. The electromechanical pulse generator comprises very few parts and includes an effective mechanism to prevent contact rebound. An upper, user-actuable and rotatable part has a surface with a plurality of projections. A lower part has an electrical conductor with a displaceable resilient contact portion biased against the projections and two electrical contacts positioned, in the plane of rotation, on either side of the displaceable contact portion.