This paper summarizes data obtained at Oklahoma State University under contract with ASME through RCMPE to measure the deflection characteristics of commercially produced Bourdon tubes. The method of measurement was designed to produce accurate results without including effects of end constraints. Reasonably good agreement with theory was shown. Deviation of the cross-sectional shape of the tube from ideal flat oval shape could not be shown to influence the behavior. An outline of a method of preliminary design of a Bourdon tube is given. Suggestions are made for additional research using stress free electroformed tubes of ideal shapes.

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