Use of a Radial Deflection Cathode Ray Oscillograph as a Time Comparator

THE comparator principle is well known in the accurate determination of lengths. It may also be applied to the measurement of time intervals. By installing an extra electrode system in a standard type of cathode ray tube, radial deflections and spiral time bases are readily produced. Such a modified tube has advantages over the ordinary tube when the latter is used to obtain radial deflections, whether by anode voltage modulation 1,2,3,4, or by auxiliary apparatus5.