Bourdon pressure gauge having direct-coupled electronic and visu

Details Bourdon pressure gauge having direct-coupled electronic and visu Bourdon pressure gauge having direct-coupled electronic and visu

1975-06-05

1976-11-23

Woodiel, Donald O.

Measuring and testing

Gas analysis

Moisture content or vapor pressure

73411, 338 40, G01L 902, G01L 704

Patent

active

039929450

ABSTRACT:
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.

REFERENCES:
patent: 1986695 (1935-01-01), Warner
patent: 2752558 (1956-06-01), Kane
patent: 3068700 (1962-12-01), Bourns
patent: 3123791 (1964-03-01), Roche et al.
patent: 3599493 (1971-08-01), Thomas
patent: 3629774 (1971-12-01), Crites

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