Patent ID: 6530281
Filing Date: 2003-03-11
Classification: G01L

Abstract:
A pressure gauge comprising:a) a housing, b) a Bourdon tube coupled to a pressure reservoir for receiving a pressurized fluid, c) a spindle supported on said housing, d) means for recovering said spindle. e) a pinion secured on said spindle and rotated in concert with said spindle, f) a sector gear rotatably secured in said housing and engaged with said pinion, g) a disc secured to said spindle and rotated in concert with said spindle, said disc including a peripheral portion having a plurality of openings formed therein, h) a link coupled between said Bourdon tube and said sector gear for rotating said pinion via said sector gear, and for rotating said spindle and said disc in correspondence with a pressure in said Bourdon tube, i) a light emitting device disposed on a first side of said disc for generating and emitting a light through said openings of said disc, j) a detector disposed on a second side of said disc for detecting the light generated by said light emitting device and transmitted through said openings of said disc, and for detecting a rotational movement of said disc in correspondence with the pressure in said Bourdon tube, k) an electric circuit coupled to said detector for receiving a detected signal from said detector in correspondence with a pressure in said Bourdon tube, l) means for energizing said electric circuit, and m) a displayer for displaying the pressure in said Bourdon tube.