Finding Number (Click this to view full catalogue structure)MS41
TitlePapers of Sir Henry William Hugh Warren
Extent1 file
DescriptionMinutes and memoranda of internal and external meetings and discussions which Warren attended as Head of Research, British Thomson Houston Company Laboratories (BTH), Rugby, together with associated papers relating to radar developments.
Access ConditionsAccess to all registered researchers.

A typed note at the front of the file signed by Donald H. Tomlin, 20 May 1987, states much of the content was originally marked 'secret' or 'confidential' but this was downgraded to 'unclassified' in 1946, and most of the material was disclosed at the IEE Radiolocation Convention in 1946.
Finding AidsA catalogue of this collection is available on the online archive catalogue. Click on the Finding Number to display the summary contents list of the catalogue and to view the full catalogue.
Access StatusOpen
Administrative HistorySir Henry William Hugh Warren, 1891-1961. Warren attended Merchant Venturers' Technical College, Bristol. He worked as a Demonstrator (Chemistry and Physics) at Bristol University, 1907-1911; and was employed by the British Thomson-Houston Co. Ltd, Rugby from 1911 until 1947, where he was Director of Research (for 24 years), Director of Engineering and Managing Director. He was Managing Director of Associated Electrical Industries Limited from 1948 until his retirement in 1954. Warren was knighted in 1951. His publications include Electrical Insulating Materials, 1931; various technical papers on electrical ignition, synthetic resins, engineering materials, education, research, production of light; and miscellaneous essays. Reference: Who Was Who ( A&C Black ).

A typed note at the front of the file states "The content of this file are of utmost historical interest being probably the only remaining source of information relating to the early use of the cavity magnetron, as opposed to the much published 'development' at Birmingham University. It is also probably the only source of information on the B.T.H. role in the development of the high power magnetron, high power modulators, and the GL111".
AcquisitionThis collection was deposited in 1997. A typed note at the front of the file reads "This file is being handed to Birmingham University in 1997, for safe keeping in perpetuity, being intimately connected with both B.T.H. [British Thomson Houston Company Laboratories] and BU [University of Birmingham] Physics Department, particularly with Oliphant".
Associated MaterialsA typed note at the front of the file states minutes can also be found in the AVIA 7 series at [The National Archives], in the area of 3500, (ADRDE file R1101 series).