NotesMinibrix construction bricks were made by the Premo Rubber Co Ltd of Petersfield, Hampshire, England, between 1935 and 1976. Premo was a subsidiary of I.T.S. Rubber Ltd, which had been founded in 1919 by Arnold Levy, and was located at Sandringham Road, Petersfield.
Arnold Levy went into the leather and grindery trade, as a wholesale supplier to the shoe repair industry. His business took him to the United States of America where he learnt about a revolutionary new style of rubber shoe heel and the Petersfield factory was initially established to manufacture the heel under licence. At its peak, the factory employed 250 workers and was the largest employer in the town. The company prospered and decided to diversify with the shoe supply side conducted under the name 'Itshide' while Premo was used as the trade name for a further range of rubber goods including bath brushes, complexion brushes, rubber bath mats and various medical items.
The origin of the Minibrix idea is unclear but Arnold may have seen the fibre-interlocking toy bricks of the early 1930s introduced by the Erector Company in America and the rubber interlocking bricks, called 'Bild-O-Brik made in Pennsylvania, in 1934.
The Minibrix system consisted of small red rubber bricks, 1 in x ½ in ? in, (25mm x 12.5 mm x 9mm) which had two lugs or "pips", protruding from the bottom which connected to the brick below which had two holes in the top. The construction method, later reinterpreted in plastic, came to dominate construction toys to the present day. Initially eight sets were available, numbered 0 (Junior Set) to 7 ranging from 147 to 1,376 parts to build from 54 to 116 models. The sets were launched in 1935 and contained whole bricks, half bricks, angle bricks, lintels, and thin plastic windows and doors and roofs made of cardboard. A series of four accessory outfits was also available to build up to the larger sets and an instruction manual contained photographs of the models together with a set of architectural-style 'blueprints' with plans and elevations. These models were advertised as having been designed with the aid of a 'well known' architect, W.A.T. Carter A.R.I.B.A. At the end of the catalogue photographs of 'supermodels' depicted Hampton Court, Tower Bridge and a skyscraper modelled on the Empire State Building measuring nearly 4 feet (1.2 metres) in height. There were no instructions for these but could be obtained from a toy dealer who also kept a range of spare parts for separate sale. By this time the factory was also making models for shops and exhibition displays.
The range of parts increased in 1936 and the sets were revised with new parts added including balustrades, Corinthian pillars, double-angle bricks and universal pins in the larger sets. The roofs were changed from cardboard to rubber sheets and rubber base plates could be purchased on which to build the models. The blueprints were discontinued in favour of a new colour instruction manual.
Minibrix was a very labour-intensive to make. Each rubber brick was moulded individually and emerged from the moulds with a ring of waste rubber around the top and bottom of each brick. This was removed by hand in the trimming shop, a process which required eight separate scissor cuts. After about 1959, and under new management, a new process was introduced which saw several bricks moulded at once in a pad which was then cut into separate bricks afterwards. Unfortunately, the bricks were no longer identical and when walls were built they did not fit as precisely as before.
In common with many construction toys such as Meccano and Airfix, a club called Minibuilders' was established to encourage modellers. An application form was provided with every set and members received a badge, certificate, special Minibrix pencil and newsletter, the 'Minibuilders' Bulletin'. A prize was offered for any model design sent in that was later published in a manual.
During the Second World War production of Minibrix ceased between 1942 and 1947 as the factory went over to making rubber tank treads and other items with a military application. One of the post-War consequences was an increase in the price of Minibrix sets due to the sharp rise in the cost of rubber. Nevertheless, post-War sales of Minibrix increased with the economic climate and birth of the baby boomers. But the firm became complacent, especially after the death in March 1955 of Arnold Levy, and he was succeeded by his brother, Moss, as managing director. In 1959 the Levy family's controlling was bought by Colstons Ltd. Cost-cutting measures saw the production methods of Minibrix change, the Tudor Minibrix were dropped from the range altogether, and the base plates, individual roof tiles and purlins removed from sets. The Corinthian columns were replaced by much longer plastic versions called 'supporting poles', the doors and windows were redesigned to bring them more up-to-date and a large picture window was added, together with a set of garage doors to acknowledge the increased popularity of the family car. By this time the sets were revised and reduced in number to just four: Starter, Premier, Super and De Luxe, the latter of which was only the size of the old 433-piece No.4 set. There were three accessory sets, Nos 0, 1 and 2, which upgraded the four sets. The sets were packaged in cardboard mailing tubes, rather than a box and the manual was reduced to 14 pages.
By the 1960s competition from plastic building toys, especially from LEGO, was intense so in a final desperate attempt to update, a series of accessories including plastic trees, flowers, window boxes, hanging lamps, a sundial and balconies with canopies were introduced. These were not made by the firm but were sold in a new range of 22 Minibrix Extra sets.
The last Minibrix sets were introduced in the late 1960s, Nos 1, 2 and 3, and came in red or rainbow versions. Production faded in the early 1970s and had ceased altogether by 1976.