Grace's Guide To British Industrial History

Registered UK Charity (No. 115342)

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 163,136 pages of information and 245,598 images on early companies, their products and the people who designed and built them.

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,919 pages of information and 233,587 images on early companies, their products and the people who designed and built them.

Hivac

From Graces Guide
September 1947.
August 1948.
January 1949.
March 1949.
December 1951.
September 1953.
June 1955.

of South Ruislip. The first UK company to manufacture a miniature valve.

1934 Paul Freedman was granted an exemption under the Aliens Restrictions Act, in respect of Industrial Development Laboratories, engaged in Research and Development of New Products; 6, Hillside Gardens, Highgate, N.6[1]

1930s Established as the Freedman Valve Co

Name changed to the High Vacuum Valve Co, later Hivac

1939 Private company. Automatic Telephone and Electric Co took a controlling interest in Hivac as basis for facilities for electronic development in telecommunications[2].

1944 Automatic Telephone and Electric Co gained full control of Hivac[3].

1945 First patent to Hivac, with Alexander R. Rangabe, on electronic tube.

By 1949 manufacturer of miniature and midget thermionic valves for deaf aids, etc

1961 Manufacturers of thermionic and electronic devices, including subminiature valves, cold cathode tubes, filamentary and neon indicator lamps. 700 employees. [4]

See Also

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Sources of Information

  1. London gazette 4 May 1934
  2. [1] Competition Commission
  3. [2]Competition Commission
  4. 1961 Dun and Bradstreet KBE