Vislok
From Graces Guide
Maker of a design of locking nut, of Salisbury Sq, London (1916)
of Market Harborough.
1913 Vislok nuts first offered for sale.
1914 Company formed
1916 Offered a range of safety nuts which were used by a wide range of clients[1]. Based on the coincidence of address, and the fact that the advertising was handled by Haddon Advertising[2] it seems likely this company was part of Haddon group of companies
1922 Walter Haddon was managing director
1926 Vislok were used in Tungstone batteries[3]
1928 Patent with William Haddon on "Improvements in the manufacture of cap nuts"
See Also
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