Southern Instruments
of Camberley.
1938 Private company.
1957 The Oscillograph Division offered single and multi-channel Cathode-ray Oscillograph recording equipment. Pen Recorders, Transient Recorders, Engine Indicators, Recording Cameras, Electrical Gauges and Transducers for measuring Pressure, Force, Vibration, Acceleration, etc.
1960 It had taken scientists in the Design Department three years to develop, and a further year to test, the Ansafone answering and recording machine.[1]
1961 Electronic engineers and manufacturers of electronic instruments and apparatus, oscillographs, oscilloscopes; designers and manufacturers of data handling and recording equipment, analytical instruments and electrical control equipment. 450 employees. [2]
1970 Acquired by Plantation Holdings (55 percent); the remainder was held by I.C.F.C.[3]. Acquired Shandon Scientific Industries and the 2 companies' operations were to be merged[4] as Shandon Southern Instruments[5]
1971 Shandon Southern Instruments acquired 50 percent of Southern Measuring Instruments not already owned[6]. Other companies in the group were Southern Communications Ltd, maker of dictation system, and Superswitch Electric Appliances Ltd[7]
1971 As part of the continued move of Plantation Holdings into light engineering and scientific instruments, Southern Instruments acquired Bryans, maker of x-y plotters, from Seltronic Group[8]