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 143,388 pages of information and 230,040 images on early companies, their products and the people who designed and built them.

Tungsten Lamp Association

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1912 BTH, GEC, and Siemens pooled their patents on metal filament lamps; with Ediswan they formed the Tungsten Lamp Association.

1919 The British Carbon Lamp Association and the Tungsten Lamp Association combined to form the Electrical Lamp Manufacturers Association of Great Britain. Principal members were BTH, GEC and Siemens Brothers and Co; 6 other companies had also joined and 7 others were non-associates[1].

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Sources of Information

  1. The Times, 17 March 1920