Patent ID: 7129468

Claim:
An electronic assembly that makes possible the production of wireless electric stringed musical instruments that do not need a connecting cord or amplifier but senses said instruments' vibrations and broadcasts them by means of radio waves to any near by radio receiver where they are reproduced at an amplified level said assembly comprising: A. a removeable battery, mounted inside the assembly, and connected by means of a switch to provide power to said electronic assembly B. an opto-electric sub-assembly comprising a light source 38 and a light detecting element 36 for each of the strings of said musical instrument mounted on either side of said string in such a way that the light from said light source impinging on said detector is interfered with when said string vibrates causing a fluctuating current in said detector that in conjunction with current resistor r 2 where the emitter of said detector is connected causes a fluctuating voltage that is analogous to said strings vibrations C. a cover for said sub-assembly that shields it from ambient light D. a radio transmitter that processes said fluctuating voltage and broadcasts said musical instruments' vibrations to any near by radio receiver.