Rockin’ Patent – Constant Martin’s “Electronic Musical Instrument”
Rockin’ Patent: US Patent No. 2,563,477 Filed: 1 May 1948 In the name of: Constant Martin (inventor) Title: Electronic Musical Instrument What’s claimed: “In an electronic musical instrument in combination with an oscillator unit, a tube-coupling unit, a filter unit, an amplifier unit and a loud-speaker mounted in sequence from the output of said oscillator, said oscillator unit comprising a first tube and a second tube having its grid coupled through a capacity with the anode of said first tube and having its anode coupled through a resistance with the grid of said first tube, variable grid-resistance means for said second […]
