A method of displaying vectors on a cathode-ray tube

A form of vector presentation is described in which one vector is used as reference and displayed as a radial line from the centre of the display-tube screen. Other vectors are represented as dots which mark their extremities. Each vector is replotted during each cycle. This enables locus diagrams to be observed and recorded, such diagrams including a time scale. Some examples of the application of the apparatus to the study of electrical machinery are included.