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1927 B. I. M Ltd was established, manufacturer of gas mantles with works at Roden Street, Ilford. John Ismay was chairman.
1931 Introduced electric lamps.
1933 John Ismay and Sons Ltd was floated to acquire B. I. M. Ltd, manufacturer of electric lamps and gas mantles. Subdidiary companies included an organisation selling the products, and a glass manufacturing making the glass used in electric lamps
1933 Public issue of shares to fund expansion. The electric lamp business was growing rapidaly mainly supplying lamps carrying the name of the retailer but next season the company would introduce its own brands - Relma and Fenbo
1934 British Crystalite Co was marketing the Fenbo crystal lamp; had established a subsidiary to manufacture the neon tubular lamp; had acquired large interest in merchants H. C. Rawson which also was interested in Halcyon Radio Co which had recently introduced a new model and was also interested in television
1934 Increase in capital; rights issue
1935 Further issue of shares
1935 Ismay Industries was formed to take advantage of various opportunities in the electrical industry and acquired this company, whose shareholders gained rights to subscribe for the new company. This would enable the company to obtain parts from associated companies.
1935 Testing a radium ray lamp
1936 Had developed a low tension neon lamp which provided a light close to daylight.
1937 The company had sold some of its investments; the company was concentrating on lamps made at the Ilford factory
1938 Ismay Industries sold the electric lamp business of John Ismay and Sons as well as its holding in Britannia Electric Lamp Works, which was John Ismay's principal customer, and its interests in Briton Lamps Ltd
1940 The company was still in existence at this time