Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 137,386 pages of information and 220,926 images on early companies, their products and the people who designed and built them.
Armstrong Whitworth and Co (Tools) Ltd, London and Tynemouth
Armstrong Whitworth and Co (Pneumatic Tools) Ltd
1961 Manufacturers of electric and pneumatic tools. 354 employees. 
By 1962 Armstrong Whitworth and Co (Pneumatic Tools) Ltd had changed its name to Thor Tools Ltd.