US 4,502,334 AGranted

Combined pressure gauge-transmitter

AssigneeDresser Industries, Inc.

InventorsJoseph E. Gorgens, Randall Goff, Stephen G. Sardi

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Abstract

A Bourdon tube adapted for connection to a source of fluid pressure operates both a mechanically driven gauge pointer and an optical-electronic transmitter for providing operatively parallel output signals corresponding to values of pressure incurred by the fluid source. Simultaneously operative from the displaceable end of the Bourdon tube are both a mechanical movement for effecting amplified displacement of the pointer relative to a dial plate and an opaque vane displaceable within the transmitter between a photoemitter and a pair of photosensors. Circuitry in the transmitter responsive to discrete changes in light interruption between the vane and one of the photosensors emits a signal current corresponding to the pressure value at any given position of the vane.

Claims8

Dependent claims

A combination pressure gauge-transmitter for providing indications of pressure values comprising:

(a) a gauge case;
(b) a Bourdon tube within said case of selected configuration having a fixed end connected to an inlet socket adapted for connection to a source of fluid pressure and a free end adapted for displacement in response to changes in values of pressure incurred by the connected fluid source;
(c) a pointer operatively connected to the free end of said Bourdon tube for displacement therewith relative to a dial plate in correlation to pressure changes incurred by the connected fluid source;
(d) a vane operatively attached to the free end of said Bourdon tube for displacement therewith in a predetermined travel path in correlation to pressure changes incurred by the connected fluid source;
and
(e) a photo-optic transmitter geometrically positioned within the operative tube arc of said Bourdon tube and including a pair of photosensors, a photo emitter arranged to define a light path projecting toward said photosensors in a direction transverse to the travel path of said vane for said light path to incur gradual increased and decreased interruption by the position of said vane in the course of its displacement and electric circuit means operative continuously to generate an analog signal at any given position of said vane in said light path corresponding to a value of pressure being incurred by the connected fluid source.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/520,353Filed 4 Aug 1983
Granted: 5 Mar 1985
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

G01L 7/043
In the form of flexible, deformable tubes, e.g. Bourdon gauges: with mechanical transmitting or indicating means
G01D 5/34
With attenuation or whole or partial obturation of beams of light: the beams of light being detected by photocells
G01L 9/0032
Transmitting or indicating the displacement of flexible, deformable tubes by electric, electromechanical, magnetic or electromagnetic means: using…
G01L
Measuring force, stress, torque, work, mechanical power, mechanical efficiency, or fluid pressure