Syphon Diaphragms : A Method for Predicting Their Performance for Purposes of Instrument Design
This is a 1922 technical report from NASA's technical reports collection on predicting the performance of syphon diaphragms for instrument design, with its figures showing test graphs and drawings of the device. The record names no publisher or place, so the pictures are the main evidence. The first figure plots deflection against central load for several syphons, the second plots deflection against pressure under constant load, and the third is a cross-section drawing of a corrugated bellows fixed to a wooden block, giving a designer clean line graphs and a mechanical sketch of wavy diaphragm profiles.
