Gage
First Claim
1. A gage for measuring the width of a gap, said gage comprising:
- a gaging conduit having an inlet and an outlet;
pressure means supplying gas under pressure to the inlet of the gaging conduit, said pressure means maintaining the gas pressure at such a value that gas flow through the gaging conduit is in the non-compressible aerodynamic regime, said gaging conduit exhausting gas to a region of lower pressure;
a hot-wire anemometer in the gaging conduit; and
means responsive to the condition of the anemometer conduit to measure the size of the gap between the outlet of the gaging conduit and a surface as a function of gas flow rate in the gaging conduit.
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Accused Products
Abstract
A gage for measuring the width of a gap. The gage includes a gaging conduit with an inlet and an outlet. Pressure means supplies gas to the inlet. A hot-wire anemometer is placed in the gaging conduit, and means is responsive to the condition of the anemometer to measure the size of the gap between the outlet of the gaging conduit and the surface as a function of the gas flow rate in the gaging conduit. In a preferred embodiment, a reference conduit is provided which has an inlet and an outlet, and which receives gas under pressure from the pressure source, and a reference orifice through which gas flows when exiting through the reference conduit. A hot-wire anemometer is placed in this reference conduit, the said means being responsive to differences in conditions of the two anemometers.
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Citations
33 Claims
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1. A gage for measuring the width of a gap, said gage comprising:
- a gaging conduit having an inlet and an outlet;
pressure means supplying gas under pressure to the inlet of the gaging conduit, said pressure means maintaining the gas pressure at such a value that gas flow through the gaging conduit is in the non-compressible aerodynamic regime, said gaging conduit exhausting gas to a region of lower pressure;
a hot-wire anemometer in the gaging conduit; and
means responsive to the condition of the anemometer conduit to measure the size of the gap between the outlet of the gaging conduit and a surface as a function of gas flow rate in the gaging conduit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
- a gaging conduit having an inlet and an outlet;
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18. A gage for measuring the width of a gap said gage comprising:
- a plenum change;
pressure means maintaining gas in the plenum change under pressure;
a reference conduit having an inlet in the plenum chamber, an outlet exhausting gas outside the plenum chamber, and a reference orifice through which the gas flows when exiting the plenum chamber through the reference conduit;
a gaging conduit having an inlet in the plenum chamber and an outlet exhausting gas outside the plenum chamber through which gas flows when exiting the plenum chamber through the gaging conduit, said pressure means maintaining the gas pressure at such a value that gas flow through the gaging and reference conduits is in the non-compressible aerodynamic regime, a first hot-wire anemometer in the gaging conduit;
a second hot-wire anemometer in the reference conduit; and
means responsive to the condition of both of said anemometers in their respective conduits to measure the size of the gap between the outlet of the gaging conduit and a surface as a function of gas flow rate in the gaging conduit compared to gas flow rate in the reference conduit. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
- a plenum change;
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32. A gage for measuring the width of a gap, said gage comprising:
- a gaging conduit having an inlet and an outlet;
pressure means supplying gas under pressure to the inlet of the gaging conduit, said gaging conduit exhausting gas to a region of lower pressure;
a hot-wire anemometer in the gaging conduit;
means responsive to the condition of the anemometer conduit to measure the size of the gap between the outlet of the gaging conduit and a surface as a function of gas flow rate in the gaging conduit;
a calibrtion conduit connectible to the gaging conduit downsteam from the anemometer;
a calibration orifice in said gaging conduit; and
selector means for selectively connecting the inlet of the gaging conduit to the outlet or to the calibration conduit.
- a gaging conduit having an inlet and an outlet;
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33. A gage for measuring the width of a gap, said gage comprising:
- a plenum chamber;
pressure means maintaining gas in the plenum chamber under pressure;
a reference conduit having an inlet in the plenum chamber, an outlet exhausting gas outside the plenum chamber, and a reference orifice through which the gas flows when exiting the plenum chamber through the reference conduit;
a gaging conduit having an inlet in the plenum chamber and an outlet exhausting gas outside the plenum chamber through which gas flows when exiting the plenum chamber through the gaging conduit;
a first hot-wire anemometer in the gaging conduit;
a second hot-wire anemometer in the reference conduit;
means responsive to the condition of both of said nemometers in their respective conduits to measure the size of the gap between the outlet of the gaging conduit and a surface as a function of gas flow rate in the gaging conduit compared to gas flow rate in the reference conduit;
a calibration conduit connectible to the gaging conduit downstream from the anemometer;
a calibration orifice in said gaging conduit; and
selector means for selectively connecting the inlet of the gaging conduit to the outlet or to the calibration conduit.
- a plenum chamber;
Specification