This page features photographs of the main Bell Punch and Sumlock-Anita Electronics buildings remaining in 2003 and 2004.

The Sales Headquarters in London

Bell Punch had a separate sales and distribution organisation for its calculators, initially called London Computator Ltd.. It was renamed Sumlock Limited from 1950 due to the success of the Sumlock range of mechanical calculators, and was renamed again to Sumlock Comptometer Ltd. when the UK operations of Comptometer Corporation were taken over in 1961.

The first sales head office was at 1 Albemarle Street, London, W1., off Picadilly. It then moved directly across Picadilly to 39 St. James's Street, London, SW1.

The Headquarters and Main Factory at Uxbridge

As described in the section Origins of the Bell Punch Co., in the early 1920s the company moved to a new site called "The Island", off Rockingham Road in Uxbridge, to the west of London.

An aerial view of this site, taken around 1970, is repeated below:

Key to the aerial photograph:

1. The modified air-raid shelter where development of the Anita calculator began.
2. The purpose-built research and development centre of Sumlock Anita Electronics.
3. Metalwork shops, for pressing and machining metal parts for calculators, ticket machines, and other products.
4. The print factory which was full of machines printing tickets.
5. The two arms of the River Colne.
6. The canal.
7. Rockingham Road.
8. Waterwheel house which at one time had a water-powered electrical generator for generating some of the power for the site.

From 1952 calculator assembly, firstly mechanical and later electronic, was largely moved to new premises in Portsmouth, on the south coast. Concentrated on the site at Uxbridge was the printing of tickets and the manufacture of other Bell Punch Company products, including ticket issuing systems, taximeters, and totalisators.

One arm of the River Colne flows through the site and one arm flows just past it, which led to the the company's address of 'The Island', Uxbridge, Middlesex. This had been the site of a water-powered mill, and the company took advantage of this to power a generator which provided some of the electricity for the site.

In the years since the the above aerial photograph was taken and the Bell Punch Company and Sumlock Anita Electronics were closed, most of the buildings on this site have been demolished and replaced by a variety of business and industrial units. However, this appears to have taken place in a piecemeal way and the overall layout of the site has been largely preserved.

The following photographs of the Uxbridge site were taken during a visit to the site in June 2004, on a very wet day !

The only part of the original Bell Punch factory structure remaining was this section of the metalwork shop (marked C in the aerial photograph, and here looking from the top of that photograph).

Going to the right around the metalwork shop shows a further section of it, flanked on both side by later replacement buildings.

The other significant building to be seen remaining on the site was this one which is labelled H in the aerial photograph and is called "Mill House".
This building is likely to be the original mill buidling on the site before Bell Punch moved there in the early 1920s. Part of this was used as the electricians' shop, and the small structure with the sloping roof on the right housed the waterwheel which was used to generate some of the electricity required on the site.

The Portsmouth Factory

In the early 1950s the "Sumlock" and "Plus" adders were proving very successful and production was increasing. However, due to planning constraints on expanding the site at Uxbridge and a shortage of a suitable additional workforce in the area, additional premises were opened at Portsmouth, on the south coast, in 1952. These were on the then new Fratton Industrial Estate, at the rear of Portsmouth soccer club's Fratton Park ground. Soon a further building nearby was required, and at least for a couple of years in the 1960s a third building, on the opposite side of Rodney Road, was used by the company.

In these premises on Rodney Road the "Sumlock", "Plus", and in the 1960s the "Comptometer", mechanical calculators and later the "Anita" electronic calculators were assembled. Other Bell Punch products, such as the ticket issuing machines and the taximeters may also have been assembled here, and some ticket printing may have been undertaken.

The photographs below were taken on a visit in November 2004.

The first premises occupied by the Bell Punch Co. on Rodney Road, in 1952. In Novemeber 2004 it was occupied by a company specialising in fire and security equipment, and there have been some additions and alterations made to the buildings.

A view from the other direction. Note the floodlight towers of Portsmouth soccer club's Fratton Park ground in the background.

This is the second premises which Bell Punch started to occupy in the 1950s on Rodney Road, on the corner with Anson Road. The roof of the first premises can be seen behind the white van on the left. Separating the two is the set back building of Remploy Ltd., which occupied its site at the same time that Bell Punch moved to Rodney Road.

An old photograph showing Anita 1000 series calculators undergoing their final checks before despatch in one of the Sumlock Anita Electronics factories on Rodney Road in the late 1960s.

The Bell Punch Company & the Development of the Anita Calculator
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Text & photographs copyright © 2002 - 2008 Nigel Tout, except where noted otherwise.