Company Data
Companies linked to Bell Punch Co.
Bell Punch Co. Ltd. - Founded 1878, broken up 1986. The original company and the manufacturer of the mechanical and electronic calculators until 1966 when Sumlock Anita Electronics was split off.
Control Systems Ltd. - Founded 1927. Holding company for Bell Punch and its subsidiaries.
London Computator Ltd. - Founded 1940. Subsidiary, distributor of the first Bell Punch mechanical calculators. Replaced by Sumlock Limited.
Lamson Industries - Bought Control Systems and its subsidiaries in 1957.
Sumlock Limited - Founded ????. Subsidiary, British distributor of the Bell Punch mechanical calculators. Replaced by Sumlock Comptometer.
Bell Punch Export Co. Ltd. - Export sales subsidiary of Bell Punch Co.
Sumlock Comptometer Ltd. - Founded 1961. Subsidiary, incorporating Comptometer Ltd. for distributing Bell Punch calculators.
Sumlock Anita Electronics - Founded 1966, split off from Bell Punch Co.. Subsidiary, manufacturer of the electronic and mechanical calculators.
Rockwell Anita - Founded 1973.
Facilities:
Control Systems Ltd.:
The Island, Uxbridge, Middlesex.
Bell Punch Co.:
Original site:
Tabernacle Street, London.
Headquarters and factory of Bell Punch Company, from 1922:
The Island, Uxbridge, Middlesex.
Bell Punch parts manufacture:
Uxbridge and at Herne Bay.
Research and development department for electronic calculators:
Uxbridge.
Administration Sumlock Anita Electronics and Sumlock Anita:
Rockingham Road, Uxbridge.
Electronic and mechanical calculator factory, opened in 1966:
Sumlock Anita Electronics, Rodney Road, Portsmouth, Hampshire.
London Computator Ltd. which later became Sumlock Limited. and then Sumlock Comptometer Ltd.:
London premises at:
1 Abermarle Street, London, W1.
39 St. James St, London, SW1. - Head London office and Export Division.
102/106 Clerkenwell Road, London EC1. - This site housed the London service and sales
branch for both mechanical and electronic calculators, a training school for mechanical "Comptometer" operators, and the national training centre for the electronic calculators.
Apsley, Hertfordshire - From about 1970 became the national training centre and a central servicing facility for the later electronic calculators.
Bell Punch Export Co. Ltd.:
39 St. James's Street, London S.W.1.
U.S. distributor of Plus adding machines:
Plus Computing Machines Inc., 5 Beekman St., New York 38, N.Y.
A subsidiary of Bell Punch Co. Ltd.
The Bell Punch Company & the Development of the Anita Calculator
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Text & photographs copyright © 2002, 2003 Nigel Tout, except where noted otherwise.