An Impulse Electric Motor for Driving Recording Instruments
A 1923 technical report from the NASA Technical Reports Server, describing an impulse electric motor built to drive recording instruments, probably for an engineering or research audience. The four plates are line drawings and photographs of its magnet coils, rotating disc armature, and a chart of magnetic force against air gap. For a designer, the plates offer clear mechanical diagrams and a graph style with a plotted curve and grid, useful for technical or scientific visual references.
