Patent ID: 6684712
Filing Date: 2004-02-03
Classification: G01L,Y10T

Abstract:
A measuring instrument for a pressure gauge comprising:an indicator unit, including: a top plate, a bottom plate, wherein the top plate and the bottom plate are joined to each other and arranged essentially parallel to and distanced from each other, an indicator shaft, including an indicator pin projecting from the top plate, a pinion carried on the indicator shaft, and a gear segment, wherein the indicator shaft and the gear segment are borne rotatably in and between the top plate and the bottom plate and wherein the gear segment includes: a lever section, and a toothed section that engages the pinion, a spring carrier, an arc-shaped Bourdon tube including: an interior, a first end joined to the metal spring carrier through which a measurement pressure can flow into the interior of the Bourdon tube, and a second end; and a spring end-piece rigidly joined to the second end of the Bourdon tube, wherein the spring end-piece is displaced depending on the measurement pressure applied to said Bourdon tube, connected to the lever section such that the displacement of the spring end-piece is transferred to the lever section, and is attached to either the top plate or the bottom plate prior to the Bourdon tube being joined to the spring end-piece and is separated from either the top plate or the bottom plate once the Bourdon tube has been joined to the spring end-piece, wherein the either top plate or the bottom plate comprise a plate to which the spring-end piece is attached prior to separation.