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Crypton Equipment of Park Royal, London, of Bridgwater, Somerset. Now Crypton, of Birmingham.
1890 A business was established under the name of Newton (Newton Electrical Works?) to manufacture electric motors and generators.
1920s The business developed testing equipment for the motor industry. This business was then sold to Lancashire Dynamo and Motor Co, who wanted to expand their garage equipment interests.
1936 Produced one of the world's first engine testers.
1950s Pioneered the concept of 'area testing' and the use of oscilloscopes in testing.
1961 Manufacturers of automobile engine, battery and electrical testing and servicing equipment. 300 employees. 
1960s Research into computer controlled equipment
1963 Motor Show exhibitor. Engine performance equipment. 
2012 Bought by Continental of Germany.
2020 Company website - Crypton's History.
The original art deco factory frontage in Bridgwater survives, bearing the Crypto name.