In the 1960s the development of the Microdensitometer attracted the attention of an American company, Technical Operations Inc of Burlington Massachusetts. Technical Operations Inc carried out research in advanced optical and associated techniques for government customers in atomic energy, space and defence. Following the purchase of a number of Microdensitometers, Technical Operations Inc developed an attachment which would extend the capability of the Microdensitometer and enable it to carry out a process later named Isodensitometry. The isodensitometer attachment resulted in growing contact and technical cooperation between Joyce-Loebl and the Technical Operations company.

In 1967 Joyce-Loebl sold Technical Operations Inc a quarter of their equity. In 1969 Joyce-Loebl sold the rest of their shares to Technical Operations, although Herbert Loebl remained Chairman of the Board and Managing Director for a further 18 months. In 1972 the name of Joyce-Loebl & Company Ltd was changed to Technical Operations Ltd. In 1974 Herbert Loebl retired from the Technical Operations Board.

Scrapbook and movie commemorating the opening of the new Sevcon factory at the Team Valley trading estate.

These annotated scrapbooks contain collections of photographs, ephemera from events, letters, newspaper clippings and other personal items. They cover a large range of topics including family events and interests, local events in Newcastle upon Tyne and Northumbria, events within the local Jewish community, vists to Herbert Loebl's hometown of Bamberg in Germany, Herbert Loebl's many awards and achievments and items relating to the many local organisations with which Herbert Loebl was involved during his lifetime including:

Certificates confirming Loebl's membership of the Society of Instrument Technology and the Institution of Mechanical Engineers.

Comprises of source material for Loebl's thesis, a bound copy of the theses, Loebl's certificate and a graduation photograph.

Small collection of personal correspondence and ephemera, mainly dating from the time of Herebert Loebl's emigration from Germany to England, but including one correspondence file from the 1990s relating to donations to the Temple b'nai Israel.

The Optica Veture 1957 – 1963

In 1957 Joyce-Loebl entered into a collaboration with Optica Milano SpA, a small optical instrument company based in Milan who had began to develop a Spectrophotometer for the ultra violet region.

In 1957 Joyce-Loebl signed a 50-50 agreement with Optica to establish a joint venture to produce the Spectrophotometers under licence and in the same year secured a 6,000 sq. ft factory for the venture at Team Valley, Gateshead. The venture continued until 1963 when the business was acquired by the laboratory supply house Baird and Tatlock.

Joyce-Loebl and Optica also established Optica France S.A. in 1958 with Joyce-Loebl holding a 49% share. Joyce-Loebl withdew from Optica France in 1963.

Comprises of Loebl's MPhil certificate and a graduation photogrpah.