Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
52 words
A flueric partial pressure sensor including a flueric bridge having two legs adapted for sensing a reference-gas and a sample-gas mixture, respectively, characterised by being arranged to provide a constant pressure output signal for a predetermined constant partial pressure value of one of the gases.in the sample-gas mixture at varying absolute pressure.
Claim 2
Dependent Claim
52 words
A flueric partial pressure sensor including a flueric bridge having two legs adapted for sensing a reference-gas and a sample-gas mixture, respectively, characterised by being arranged to provide a constant pressure output signal for a predetermined constant partial pressure value of one of the gases.in the sample-gas mixture at varying absolute pressure.
Claim 3
Dependent Claim
35 words
A flueric partial pressure sensor as claimed in Claim 1, wherein the two legs each include a linear flow resistor and an orifice flow resistor arranged to provide an asymmetric flow rate through the legs,
Claim 4
Dependent Claim
132 words
A flueric partial pressure sensor including a flueric'bridge having one leg adapted for receiving a reference-gas and another leg adapted for receiving a sample-gas mixture, each said leg including a linear flow resistor and an orifice flow resistor serially arranged therein and being operably connected to flow inducement means for drawing said reference-gas and said sample-gas mixture therethrough, characterised in that said flow resistors are arranged to cause asymmetric flow rates through the respective legs, the orifice resistors providing a small degree of asymmetry in their relative coefficients of discharge so that changing values of coefficients of discharge at various operating pressure ratios cause a degree of differential pressure output from the bridge which varies with changes in absolute pressure when identical gases or gas mixtures are drawn through the bridge legs.
Claim 5
Dependent Claim
132 words
A flueric partial pressure sensor including a flueric'bridge having one leg adapted for receiving a reference-gas and another leg adapted for receiving a sample-gas mixture, each said leg including a linear flow resistor and an orifice flow resistor serially arranged therein and being operably connected to flow inducement means for drawing said reference-gas and said sample-gas mixture therethrough, characterised in that said flow resistors are arranged to cause asymmetric flow rates through the respective legs, the orifice resistors providing a small degree of asymmetry in their relative coefficients of discharge so that changing values of coefficients of discharge at various operating pressure ratios cause a degree of differential pressure output from the bridge which varies with changes in absolute pressure when identical gases or gas mixtures are drawn through the bridge legs.
Claim 6
Dependent Claim
25 words
A flueric partial pressure sensor as claimed in Claim 2 or Claim 3, wherein the respective orifice flow resistors are of different length/ diameter ratio.
Claim 7
Dependent Claim
22 words
A flueric partial pressure sensor as claimed in Claim 4, wherein the orifice flow resistors comprise two disc orifices of different thickness.
Claim 8
Dependent Claim
28 words
A flueric partial pressure sensor as claimed in any preceding claim having pressure output signal connections conduitly connected to control regions of a flueric laminar flow proportional amplifier.
Claim 9
Dependent Claim
30 words
A flueric partial pressure sensor as claimed in Claim 6 in combination with a fluid mixing valve adapted for regulation by pressure chambers connected with outputs from the flueric amplifier.
Claim 10
Dependent Claim
25 words
A flueric partial pressure sensor as claimed in Claim 6 in combination with an indicator device adapted for switching by outputs from the flueric amplifier.