Accelerometer design
A 1921 technical report on accelerometer design, issued by the NASA Technical Reports Server and drawn from its archive of early aeronautical engineering papers. The three pictures are line diagrams of instruments, with labelled schematics of spring-and-stylus recorders, a quartz-fiber optical accelerometer, a seismograph-type spring mechanism, and a line graph of spring movement against time in seconds. A designer could draw on their clean, plainly labelled mechanical drawings and the precise graph style for technical infographics.
