A rapid magnet-operated multisign plotter
B Fjeld, Svein Prydz · Journal of Physics E Scientific Instruments · 1971
A fast magneto-operated plotter with seven different signs appearing in either of two colours has been constructed and tested. It is half miniaturized and can be further scaled down. It is suitable for isodose and similar recording on XY plotters, and for display of as much as fourteen inputs on strip chart recorders.