Electric Guitar

History

The first electrically amplified stringed instrument to be marketed commercially was designed in 1931 by George Beauchamp, the general manager of the National Guitar Corporation, with Paul Barth, who was vice president. The maple body prototype for the one-piece cast aluminum “frying pan” was built by Harry Watson, factory superintendent of the National Guitar Corporation.^[4] Commercial production began in late summer of 1932 by the Ro-Pat-In Corporation (Electro–Patent-Instrument Company), in Los Angeles, a partnership of Beauchamp, Adolph Rickenbacker(originally Rickenbacher), and Paul Barth.In 1934, the company was renamed the Rickenbacker Electro Stringed Instrument Company. In that year Beauchamp applied for a United States patent for an Electrical Stringed Musical Instrument and the patent was later issued in 1937

To produce sound, an electric guitar senses the vibrations of the strings electronically and routes an electronic signal to an amplifier and speaker. The sensing occurs in a magnetic pickup mounted under the strings on the guitar’s body. A simple magnetic pickup looks like this:

This pickup consists of a bar magnet wrapped with as many as 7,000 turns of fine wire. If you have read How Electromagnets Work, then you know that coils and magnets can turn electrical energy into motion. In the same way, they can turn motion into electrical energy. In the case of an electric guitar, the vibrating steel strings produce a corresponding vibration in the magnet’s magnetic field and therefore a vibrating current in the coil.