Diamond H Switches
of Gunnersbury Avenue, Chiswick, London, W4. Telephone: Chiswick 6444 (4 lines, P.B.X.) Telegraphic Address: "Diamondhart, Chisk, London". (1937)
of Great West Road, Brentford.
1905 Company founded.
1934 Became private company.
1937 Electrical switch manufacturers [1]
1937 British Industries Fair Advert for "Diamond H" Switches and Thermostats. Rotary Switches of all types. "Diamond H" Cooker Switches, flush patterns. "Diamond H" Ironclad Rotary Switch Units. "Diamond H" Perfect Automatic Oven Control. Demonstrations daily with many cookers. "Diamond H" Equipment, various electrical apparatus. (Electricity: Industrial and Domestic - Stand No. Cb.816) [2]
1937 Electrical switch manufacturers. "Diamond H" Switches. "Diathermo" Thermostats. [3]
1939 Patent - Improvements in and relating to rotary switches for electric cookers.[4]
1943 Patent - Luminous electric discharge tube or bulb. [5]
1961 Manufacturers of electrical switches, thermostats, energy regulators and relays. 600 employees [6]
c.1962 Changed its name to Diamond H Controls.
1964 Opened a new factory on Vulcan Road North, Norwich.
Later acquired by Williams Holdings which then sold the company as part of Cortworth
See Also
Sources of Information
- ↑ 1937 The Aeroplane Directory of the Aviation and Allied Industries
- ↑ 1937 British Industries Fair Advert p568; and p355
- ↑ 1937 The Aeroplane Directory of the Aviation and Allied Industries
- ↑ [1] Wikipatents
- ↑ [2] Wikipatents
- ↑ 1961 Dun and Bradstreet KBE