1945 - manufacturer of cathode ray tubes and radiation and optical sensing equipment; founded by Gilbert Tomes and Alec Tidmarsh;

1949 - became limited company in 1949 with Tomes as sole owner;

1953 - moved to Croydon, pioneering work in neutron detectors;

1978 - company name changed to Centronic Ltd;

early 1990s - ceased manufacture of photomultipliers, cathode ray tubes and mass spectormeters;

2000 - management buyout