Grace's Guide To British Industrial History

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Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 167,394 pages of information and 247,064 images on early companies, their products and the people who designed and built them.

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,919 pages of information and 233,587 images on early companies, their products and the people who designed and built them.

Sumlock Comptometer

From Graces Guide
Sumlock comptometer
1973.

Sumlock Comptometer Ltd. of Anita House, Rockingham Rd., Uxbridge, Middx.

Bell Punch Co developed a full keyboard (mechanical) calculator over the few years before WWII.

1940 Launched under the name Sumlock.

1961 Bell Punch Co founded Sumlock Anita Electronics, perpetuating the Sumlock name.

1973 Part of Lamson Industries Group

1973 After reorganisation to stem losses, the business was one of 3 sold to Rockwell International[1]

See Also

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Sources of Information

  1. ↑ The Times May 22, 1973
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