Partially asembled 2-valve radio receiver, 1947.
© Science Museum / Science & Society Picture Library
Radio receiver made on the ECME machine. In 1947, John Sargrove developed a machine for automatically producing electronic circuits for radio sets. This took the name 'ECME' - Electronic Circuit Making Equipment. ECME worked by automatically milling the bakelite blanks that formed the circuit boards. It then added resistors, capacitors and the metallic circuits by a spraying proces, leaving only the final asembly to be completed by hand. Though ECME worked succesfully it required high tooling costs and long production runs were needed to make the proces economic. FInance and orders were insufficient and the project ceased within a year.