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of Pyro Works, Foundry Street, Whittington Moor, Chesterfield.
1923 January 31st. Proflex trade mark (no 433799) was registered by King, Taudevin and Gregson and transferred to John King and Son (Enamellers) Ltd
1925 July 22nd. King, Taudevin and Gregson paid deposit on land and buildings to be known as Pyro Works,
1931 'John King specialise in the production of Enamel Steel Cooker liners and crowns manufactured from 18 gauge steel. Coated with proved and time tested high temperature enamel which definitely reduce maintenance costs. Excellent adhesion of the enamels to the metal. They supply many various makes, designs and sizes of cookers on the market at the present time. These are supplied to a large number of the principle Gas Companies throughout Great Britain. The works are well equipped with the most modern type of plant, and the management are to be congratulated that in these days of trade depression they have found it necessary to put down extra plant to enable them to cope with increased demand for their products which are marketed under the registered Trade mark of PYROFLEX.'
1938 Wheatley, Kirk, Price & Co, Valuers of London did a ground plan of the factory (held with Sheffield Archives). It shows that the company is on both sides of Foundry Lane:- 21 shows office block, mixing rooms, enamel grinding machines, packaging and stores. 42 opposite shows garage, enamelling shops, machine shop, pickling shop and drying room.
1952 May 4th. John died and the firm passed to his son John.
1953 February 8th. John (son) died.
c1965 John Mitchell joined the company.
1969 on 14th February John King & Sons ( Enamellers) Ltd went into voluntary liquidation. John Mitchell, chairman said that the firm had been slowly going down, pointed out that the Government's squeeze had brought the matter to a climax. We hoped to continue with the business, but the bank was pressing for a reduction in the overdraft, hence the closure. In recent years he had extended the business to include a wide range of enamel goods.
1975 January 21st. The company was dissolved.