Some modifications to an oscilloscope camera, and the construction of a control unit
Martin H. Evans, G Pierson · Journal of Scientific Instruments · 1960
A Langham-Thompson series 200 camera has been modified to provide facilities for printing frame numbers along the edge of the photographic film, and to give warning when the supply of film is exhausted. The camera is used in conjunction with a control circuit that can provide either fully automatic operation or photography of single sweeps that have been preselected manually.