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Creator

Plessey Company plc Biography Biography
The Plessey Company plc (also known as The Plessey Company Ltd) was a British electronics, defence and telecommunications company. It originated in 1917, growing and diversifying into electronics. It expanded after World War II by acquisition of companies and formed overseas companies. It was listed on the London Stock Exchange and was a constituent of the FTSE 100 Index. In 1951, the Electronics Division started at Ilford and in 1955 the Electronics and Equipment Group was established. Around circa 1961, The Plessey Company set up four other businesses: Telecommunications Division, Plessey Avionics and Communications, Plessey Radar (Weybridge) and Plessey Marine. In 1988, Plessey and The General Electric Company (GEC) merged their telecom units to form GEC-Plessey Telecommunications (GPT), with the ownership then split with Siemens AG in 1989.

Scope and Content
Typescript annual research report covering the dates November 1967 - October 1968, outlining a study for developing arrays of photosensitive detectors with integral scanning on a silicon substrate. The report shows that a 100 x 100 photodiode detector is practicable and, with cooling, radiation could be detected. An analysis for the photodiode sensitivity is given. Produced by Plessey Company Ltd with P J W Noble written in ink in the top right corner
Extent
1 item
Language
English
Level of description
ITEM
Repository name
National Science and Media Museum, Bradford
Conditions governing access
Open Access
Conditions governing Reproduction
Copies may be supplied in accordance with current copyright legislation and Science Museum Group terms and conditions