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US3992945A Bourdon pressure gauge having direct-coupled electronic and visual readout 失效
波登压力表具有直接耦合的电子和视觉读数

Bourdon pressure gauge having direct-coupled electronic and visual
readout
摘要:
A Bourdon pressure gauge is provided with a direct-coupled electronic and visual readout. Specifically, the electronic and visual readouts are direct-coupled in that they are taken along a common linkage from the Bourdon tube. In addition, they are of comparable accuracy because the electrical readout is taken at a point of relatively small displacement amplification on the commmon linkage whereas the visual readout is taken at a point of substantial displacement amplification. In a preferred embodiment, the Bourdon tube is linked to a pivotally mounted linkage element having a cam head for driving a helicoidal gear. An electrical contact in cooperation with resistor disposed on the pivotally mounted element is used to take a variable resistance electrical readout, and a pointer for taking a visual readout is connected to the helicoidal gear. Circuitry is provided for producing an electrical current proportional to the pressure sensed by the tube, and the visual readout provides a readily accessible check on the accuracy of the electrical readout.
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