Company Information

Chart showing the relationship between the Bell Punch Company and its associated companies

Companies associated with 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.
Owners of the entire issued share capital of: Bell Punch Co. Ltd., Automaticket Ltd., Sumlock Ltd., Bell Punch Taximeters Ltd., Plus Computing Machines Inc. U.S.A., Isaac Warwick & Co. Ltd.[1]

London Computator Ltd. - Founded 1940. Subsidiary, marketing company of the Plus and Sumlock mechanical calculators. Renamed to Sumlock Limited in 1950.

Sumlock Limited - Founded 1950 by renaming London Computator Ltd.

Lamson Industries - Bought Control Systems and its subsidiaries in 1957.

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.

Sumlock Anita Ltd. - Renamed from Sumlock Comptometer Ltd. in 1974. Separate financially from Sumlock Anita Electronics, but the main UK distributor of its calculators, as well as those of other manufacturers.

 

 

Facilities:

Control Systems Ltd.:

 

Bell Punch Co.:

 

London Computator Ltd. which later became Sumlock Limited and then Sumlock Comptometer Ltd.:

 

Bell Punch Export Co. Ltd.:

 

U.S. distributor of Plus adding machines:

 

Advertisements of 1957 give the following addresses of the marketing companies of the Sumlock and Plus calculators:

"Two companies of the Bell Punch Group".

 

References:

  1. "Control Systems Limited", The Times, 18th May 1955.

The Bell Punch Company & the Development of the Anita Calculator
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