Patent US5333002A successfully refreshed from Google Patents.
Patent US5010771A successfully refreshed from Google Patents.
US5010771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fast response, high sensitivity manometric wind sensor
Assignee: United States Department of the Army
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Filing: 1990-04-04
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Granted: 1991-04-30
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Expires: 2010-04-04
Abstract
Abstract A gas flow alternator cyclically connects a microphone to a dynamic flow ssure and then a reference static flow pressure. The microphone converts the pressures to a resultant alternating differential signal providing a first input to a phase-locked amplifier. A second amplifier input is derived from an optical pickup mounted within the housing. A readout connected in the circuit with the amplifier indicates the dynamic flow pressure.
Inventors
- 👤 Charles W. Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:24
CPC Classifications
G; G01; G01P; G01P5/00; G01P5/14; G01F; G01F1/00; G01F1/05; G01F1/34; G01F1/36; G01F1/363; G01F1/38; G01F1/383
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
101 words
A sensor for measuring gas flow comprising: a housing having a first orifice for receiving dynamic gas flow therethrough, a second orifice spaced from the first orifice and communicating with a static gas, and a plenum spaced from the first and second orifice communicating with a microphone; an oblong flat plate alternator means located inwardly of the housing and having an aperture located thereon for alternately completing a passage between the phenum and the first and second orifices thus subjecting the microphone to a resultant acoustic wave dependent upon the dynamic gas flow, said alternator means driven by a tuning fork.
Claim 2
Dependent Claim
101 words
A sensor for measuring gas flow comprising: a housing having a first orifice for receiving dynamic gas flow therethrough, a second orifice spaced from the first orifice and communicating with a static gas, and a plenum spaced from the first and second orifice communicating with a microphone; an oblong flat plate alternator means located inwardly of the housing and having an aperture located thereon for alternately completing a passage between the phenum and the first and second orifices thus subjecting the microphone to a resultant acoustic wave dependent upon the dynamic gas flow, said alternator means driven by a tuning fork.
Claim 3
Dependent Claim
25 words
The device of claim 1 further comprising means mounted in the housing and adjacent the alternator means for photo-optically detecting the alternation of the alternator.
Claim 4
Dependent Claim
37 words
The device of claim 2 further comprising a phase-locked amplifier having first and second inputs, said first input being connected to said microphone, and said second input being connected to the output of said photo-optically detecting means.
Claim 5
Dependent Claim
24 words
The device of claim 3 further comprising an indicating means connected in circuit with the output of the amplifier for displaying gas flow data.
Claim 6
Dependent Claim
95 words
A sensor for measuring gas flow comprising: a housing having a first orifice for receiving dynamic gas flow therethrough, a second orifice spaced from the first orifice and communicating with a static gas, and a plenum spaced from the first and second orifice communicating with a microphone; a circular flat plate alternator means located inwardly of the housing and having a plurality of apertures located thereon for alternately completing a passage between the plenum and the first and second orifices thus subjecting the microphone to a resultant acoustic wave dependent upon the dynamic gas flow.
Claim 7
Dependent Claim
95 words
A sensor for measuring gas flow comprising: a housing having a first orifice for receiving dynamic gas flow therethrough, a second orifice spaced from the first orifice and communicating with a static gas, and a plenum spaced from the first and second orifice communicating with a microphone; a circular flat plate alternator means located inwardly of the housing and having a plurality of apertures located thereon for alternately completing a passage between the plenum and the first and second orifices thus subjecting the microphone to a resultant acoustic wave dependent upon the dynamic gas flow.
Claim 8
Dependent Claim
25 words
The device of claim 5 further comprising means mounted in the housing and adjacent the alternator means for photo-optically detecting the alternation of the alternator.
Claim 9
Dependent Claim
37 words
The device of claim 5 further comprising a phase-locked amplifier having first and second inputs, said first input being connected to said microphone, and said second input being connected to the output of said photo-optically detecting means.
Claim 10
Dependent Claim
24 words
The device of claim 5 further comprising an indicating means connected in circuit with the output of the amplifier for display gas flow data.
References Cited (Backward Citations)
US4489592A
Cited
US4506553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-04-29 | 1994-10-29 | 1995-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-29 | 1998-10-29 | 1999-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-29 | 2002-10-29 | 2003-04-30 | $7700.00 | Window Closed / Lapsed |