Grace's Guide

British Industrial History

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,478 pages of information and 233,901 images on early companies, their products and the people who designed and built them.


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of Meadowcroft Laboratories, Church Street, Chesterton, Cambridge.

1936 Established as a subsidiary of Pye Ltd

1947 Specialists in television pictures tubes, camera tubes, electron microscopes, and monoscopes for television test transmissions, as well as other products such as glass-metal terminals for hermetic sealing[1]

1951 Pye decided to develop their own cathode ray tubes for television sets; small scale production was done by Cathodeon Ltd a company in the Pye group[2].

1952 limited production of cathode ray tubes

1952 Some production of special valves

1953 Established Cathodeon Crystals

1954 New subsidiary of Pye formed, Cathodeon Electronic, which took over production of cathode ray tubes; this company made about 8% of Pye's needs for television tubes[3].

1968 Integrated into the new Pye Unicam[4]

1981 Making mainly hollow cathode lamps and deuterium arc lamps; also UV lamps, IR detectors, electronic storage devices and glass to metal seals.

1981 Part of Cambridge Electronic Industries when it was incorporated as a plc.[5]

See Also


Sources of Information

  1. The Times Oct. 1, 1947
  2. Competition Commission [1]
  3. Competition Commission [2]
  4. The Times Oct. 31, 1968
  5. Cambridge Electronic Industries incorporation filing