A high-speed recording oscillograph
I. S. Blumenthal, A. R. Eckels · Electrical Engineering · 1952
The Oscilloscribe is a high-speed oscillograph which makes ink records on a fast-moving chart of voltages having frequency components ranging from direct current to 200 cycles per second. The basic element of the instrument, which is actually a servomechanism, is a D'Arsonval meter movement with no restoring springs.